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Learn about Weldolet and Dimension Chart

Z0065c — Wed, 10 Sep 2025 02:00:00 +0000

What is Weldolet

The Weldolet is a branch connection fitting used in piping systems to connect branches from a main pipe to smaller pipes or pipe components. It is designed to create a smooth transition between the main pipe and the branch, promoting efficient flow of fluids or gases while minimizing turbulence. The design of the weldolet minimizes stress concentration and provides overall reinforcement. The butt-weld pipe branch is available in three pressure grades: STD, XS and Sch160.

Olet Fittings

A olet provides a branching point from a large-diameter pipe to a smaller-diameter pipe. The pipe welded onto the tee is called the main pipe, while the pipe welded onto the tee is called the branch pipe. Olet fittings come in full sizes, types, bores, and pressure ratings. Materials can include stainless steel, chromium-molybdenum alloy, or other alloy materials.

Olet fittings are providing an outlet from a larger pipe to a smaller one. They are used to instead of connected fittings such as reducing tees, reinforcing plates, and reinforced pipe sections.

There are many types based on the varity piping connected methods that weldolet, thredolet, sockolet, latrolet, elbolet, nipolet, sweepolet and flangolet. Why they are popular, because its outstanding advantages, such as safety, reliability, low cost and simple construction.

Specification of MSS SP-97 Weldolet

Standard	MSS-SP-97 Weldolet
Branch Diameter Range	1/8 to 24 inch / DN6-DN600
Pressure Rate	STD, XS, SCH160
Stainless Steel Weldolet	ASTM A182 F304, F304L, F306, F316L, F304H, F309S, F309H, F310S, F310H, F316TI, F316H, F316LN, F317, F317L, F321, F321H, F11, F22, F91, F347, F347H, F454L, ASTM A312/A403 TP304, TP304L, TP316, TP316L
Carbon Steel Weldolet	ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C
Alloy Steel Weldolet	ASTM / ASME A 182, ASTM / ASME A 335, ASTM / ASME A 234 GR P 1, P 5, P 9, P 11, P 12, P 22, P 23, P 91, ASTM / ASME A 691 GR 1 CR, 1 1/4 CR, 2 1/4 CR, 5 CR, 9CR, 91
Duplex & Super Duplex Steel Weldolet	ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760, S 32950

Characteristics of Weldolet Connection

Rational Structure: Butt-welded connections provide a smooth transition between the inside and outside, minimizing fluid resistance.

Reliable Strength: Withstands high pressure and high temperature conditions, offering excellent mechanical properties.

Various Sizes: Flexible branch pipe sizes meet diverse project requirements.

Versatile: Compatible with a variety of materials, including carbon steel, stainless steel, and alloy steel.

MSS SP-97 Weldolet Dimensions

Run pipe Nominal Size		Branch Nominal Size		Length			OD of Fitting			Cut hole Dia.
Run pipe Nominal Size		Branch Nominal Size		A			D			d
DN	NPS	DN	NPS	STD	XS	SCH160	STD	XS	SCH	STD	XS	SCH160
8~900	1/4~36	6	1/8	16	16	–	24	24	–	16	16	–
10~900	3/8~36	8	1/4	16	16	–	26	16	–	16	16	–
15~900	1/2~36	10	3/8	19	19	–	30	30	–	19	19	–
20~900	3/4~36	15	1/2	19	19	28	36	36	36	24	24	14
25~900	1~36	20	3/4	22	22	32	43	43	46	30	30	19
32~900	11/4~36	25	1	27	27	38	55	55	51	36	36	25
40~900	11/2~36	32	11/4	32	32	44	66	66	63	45	45	33
50~900	2~36	40	11/2	33	33	51	74	74	71	51	51	38
65~900	21/2~36	50	2	38	38	55	90	90	82	65	65	43
80~900	3~36	65	21/2	41	41	62	104	104	98	76	76	54
90~900	31/2~36	80	3	44	44	73	124	124	122	93	93	73
100~900	4~36	90	31/2	48	48	–	138	138	–	113	113	–
125~900	5~36	100	4	51	51	84	154	154	154	120	120	98
150~900	6~36	125	5	57	57	94	187	187	188	141	141	122
200~900	8~36	150	6	60	78	105	213	227	222	170	170	146
250~900	10~36	200	8	70	99	–	265	292	–	220	220	–
300~900	12~36	250	10	78	94	–	323	325	–	275	265	–
350~900	14~36	300	12	86	103	–	379	381	–	325	317	–
400~900	16~36	350	14	89	10	–	411	416	–	257	361	–
450~900	18~36	400	16	94	106	–	465	468	–	408	403	–
500~900	20~36	450	18	97	111	–	522	525	–	459	455	–
550~900	22~36	500	20	102	119	–	573	584	–	508	509	–
650~900	26~36	600	24	116	140	–	690	708	–	614	612	–

Weldolet Weight Table

Branch Nominal Size		BW Outlet
DN	NPS	ST D	X S	Sc h 1 6 0
6	1/8	0.04	0.05	–
8	1/4	0.04	0.05	–
10	3/8	.0.06	0.07	–
15	1/2	0.11	0.13	0.18
20	3/4	0.16	0.18	0.20
25	1	0.32	0.34	0.40
32	1 1/4	0.38	0.42	0.50
40	1 1/2	0.57	0.60	0.70
50	2	0.85	0.90	1.10
65	2 1/2	1.28	1.35	2.00
80	3	1.88	2.00	3.20
90	3 1/2	2.20	2.40	–
100	4	2.80	3.20	6.00
125	5	5.70	6.80	9.80
150	6	7.20	11.0	16.0
200	8	10.8	19.2	31.0
250	10	17.0	19.5	–
300	20	25.6	29.6	–
350	14	27.0	32.0
400	16	36.0	41.7
450	18	48.2	55.8
500	20	58.5	76.0
600	24	149	152

ASTM A105 Carbon Steel Weldolet

ASTM A105 is a commonly used standard for carbon steel forging materials, employed in the manufacture of various pipe fittings for pipeline systems, including Weldolet. The selection of this material for weldolet primarily leverages the superior properties of carbon steel to meet specific pipeline connection requirements under given operating conditions.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Cu	Ni	Cr	Mo	V
ASTM A105	MIN		0.60			0.10
ASTM A105	MAX	0.35	1.05	0.035	0.040	0.35	0.40	0.40	0.30	0.12	0.08

Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %	HARDNESS
ASTM A105	485 min	250 min	22 min	30 min	197 max

ASTM A182 Weldolet

ASTM A182 is a material standard for forged or rolled alloy steel and stainless steel pipe fittings suitable for high-temperature service. Therefore, ASTM A182 butt-welded branch seats serve as an ideal replacement for carbon steel (such as ASTM A105) in applications demanding superior material strength, corrosion resistance, and high-temperature performance.

Alloy Steel

Alloy steel grades specified in the ASTM A182 standard are typically chromium-molybdenum steels (Cr-Mo steels). These grades are made by adding chromium (Cr) and molybdenum (Mo) to improve their high-temperature strength, creep resistance, and corrosion resistance. These steels typically require heat treatment to achieve the desired mechanical properties.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	Cb
ASTM A182 F11 CL1	MIN	0.05	0.30			0.50		1.00	0.44
ASTM A182 F11 CL1	MAX	0.15	0.60	0.03	0.03	1.00		1.50	0.65
ASTM A182 F11 CL2	MIN	0.10	0.30			0.50		1.00	0.44
ASTM A182 F11 CL2	MAX	0.20	0.80	0.04	0.04	1.00		1.50	0.65
ASTM A182 F11 CL3	MIN	0.05	0.30			0.50		1.00	0.44
ASTM A182 F11 CL3	MAX	0.15	0.60	0.03	0.03	1.00		1.50	0.65
ASTM A182 F22 CL1，CL3	MIN	0.05	0.30					2.00	0.87
ASTM A182 F22 CL1，CL3	MAX	0.15	0.60	0.04	0.04	0.50		2.50	1.13
ASTM A182 F91	MIN	0.08	0.30			0.02		8.00	0.85	0.06
ASTM A182 F91	MAX	0.12	0.60	0.02	0.01	0.50	0.40	9.50	1.05	0.10

Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %	HARDNESS
ASTM A182 F11 CL1	415 min	205 min	20 min	45 min	121-174
ASTM A182 F11 CL2	485 min	275 min	20 min	30 min	143-207
ASTM A182 F11 CL3	515 min	310 min	20 min	30 min	150-207
ASTM A182 F22 CL1	415min	205min	20min	35min	170
ASTM A182 F22 CL3	515min	310min	20min	30min	156-207
ASTM A182 F91	620min	415min	20min	40min	190-248

Stainless Steel

ASTM A182 covers a variety of stainless steel types, including austenitic, ferritic, and martensitic grades. These grades achieve excellent corrosion resistance through the addition of high amounts of chromium (at least 10.5%) to form a passive film.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F304	MIN						8.0	18.0
ASTM A182 F304	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F316	MIN						10.0	16.0	2.00
ASTM A182 F316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10

Mechanical Property

MATERIAL	ASTM A182 F304	ASTM A182 F316
T.S (MPA)	515 min	515 min
Y.S (MPA)	205 min	205 min
EL %	30 min	30 min
R/A %	50 min	50 min

The differences between weldolet, socklet and threadolet

Feature	Weldolet	Sockolet	Threadolet
Connection Type	Butt Weld (welded to run pipe & branch)	Socket Weld (branch pipe inserted into socket)	Threaded (branch pipe screwed into fitting)
Pressure Rating	Suitable for high pressure & high temperature	Medium pressure service	Low to medium pressure
Size Range	Large range, from small to big bore	Typically for smaller bore connections	Typically for small bore connections
Applications	High-pressure pipelines, power plants, refineries, chemical plants	Moderate pressure pipelines, fire-fighting, utility piping	Low-pressure systems, instrument connections
Standards	MSS SP-97	MSS SP-97	MSS SP-97

MSS SP-97 Weldolet Manufacturers and Suppliers

We are a professional supplier of butt weld branch fittings (Weldolet), manufactured strictly in compliance with the MSS SP-97 international standard. Our products are widely used in oil and gas, chemical, power, marine, and pressure pipeline systems. All products undergo rigorous inspection and quality control to ensure customers receive safe, reliable, and durable pipe fitting solutions.

The post Learn about Weldolet and Dimension Chart appeared first on Supplier of Quality Forged Fittings-Flanges.

MSS SP- 97 Weldolet Specification

Z0065c — Wed, 03 Sep 2025 02:00:00 +0000

A MSS SP- 97 Weldolet is a type of branch connection fitting used in piping systems to create a branch connection from a larger main pipe to a smaller pipe or pipeline component. It is designed to provide a smooth transition from the main pipe to the branch pipe, thus facilitating efficient fluid or gas flow while minimizing turbulence.

Specification of MSS SP-97 Weldolet

Standard	MSS-SP-97 Weldolet
Branch Diameter Range	1/8 to 24 inch / DN6-DN600
Pressure Rate	STD, XS, SCH160
Stainless Steel Weldolet	ASTM A182 F304, F304L, F306, F316L, F304H, F309S, F309H, F310S, F310H, F316TI, F316H, F316LN, F317, F317L, F321, F321H, F11, F22, F91, F347, F347H, F454L, ASTM A312/A403 TP304, TP304L, TP316, TP316L
Carbon Steel Weldolet	ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C
Alloy Steel Weldolet	ASTM / ASME A 182, ASTM / ASME A 335, ASTM / ASME A 234 GR P 1, P 5, P 9, P 11, P 12, P 22, P 23, P 91, ASTM / ASME A 691 GR 1 CR, 1 1/4 CR, 2 1/4 CR, 5 CR, 9CR, 91
Duplex & Super Duplex Steel Weldolet	ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760, S 32950

MSS SP-97 Standard

Scope

This Standard Practice covers essential dimensions, finish, tolerances, testing, marking, material, and minimum strength requirements for 90 and 45 degree integrally reinforced forged branch outlet fittings of buttwelding, socket welding, and threaded types.

Fittings manufactured to this Standard Practice are designed to make a fully reinforced branch connection in accordance with applicable piping code requirements, when attached, at an opening in a run pipe by means of a full penetration weld.

Fittings may be made to special dimensions, size, shape, tolerances, or of other wrought material by agreement between the manufacturer and the purchaser.

Marking

Each fitting shall be permanently marked with the required identification by raised lettering, and/or by stamping, electroetching or vibro tool.

The marking shall include (but it is not limited to) the following:

a) Manufacturer’s name or trademark.

b) Material Identification The material shall be identified in accordance with the marking requirements of the applicable ASTM Specifications, including Heat Identification.

c) Class The Fitting Class – “STD” (Standard), “XS” (Extra Strong), “SCH 160” (Schedule 160), “3000” or “6000”. Alternatively, the designation 3M or 6M, as applicable, may be used where “M” stands for 1,000.

d) Size The nominal size of the pipe that the fitting’s marking identifies – Run (or consolidated range) NPS (DN) x Outlet NPS (DN).

e) SP-97 This marking indicates compliance with MSS SP-97.

Material & Grades of Weldolet Fittings

Carbon Steel :
ASTM A105 / A105N,ASTM A350 LF2 / LF3, A694 F42 / 46 / 52 / 56 / 65 / 70

Alloy Steel :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Stainless Steel :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Copper Alloy Steel :

ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No.N10276), Alloy 20 (UNS No. N08020)

Dimensions Weldolet Size on Size

Run pipe Nominal Size		Branch Nominal Size		Length			OD of Fitting			Cut hole Dia.
Run pipe Nominal Size		Branch Nominal Size		A			D			d
DN	NPS	DN	NPS	STD	XS	SCH160	STD	XS	SCH	STD	XS	SCH160
8~900	1/4~36	6	1/8	16	16	–	24	24	–	16	16	–
10~900	3/8~36	8	1/4	16	16	–	26	16	–	16	16	–
15~900	1/2~36	10	3/8	19	19	–	30	30	–	19	19	–
20~900	3/4~36	15	1/2	19	19	28	36	36	36	24	24	14
25~900	1~36	20	3/4	22	22	32	43	43	46	30	30	19
32~900	11/4~36	25	1	27	27	38	55	55	51	36	36	25
40~900	11/2~36	32	11/4	32	32	44	66	66	63	45	45	33
50~900	2~36	40	11/2	33	33	51	74	74	71	51	51	38
65~900	21/2~36	50	2	38	38	55	90	90	82	65	65	43
80~900	3~36	65	21/2	41	41	62	104	104	98	76	76	54
90~900	31/2~36	80	3	44	44	73	124	124	122	93	93	73
100~900	4~36	90	31/2	48	48	–	138	138	–	113	113	–
125~900	5~36	100	4	51	51	84	154	154	154	120	120	98
150~900	6~36	125	5	57	57	94	187	187	188	141	141	122
200~900	8~36	150	6	60	78	105	213	227	222	170	170	146
250~900	10~36	200	8	70	99	–	265	292	–	220	220	–
300~900	12~36	250	10	78	94	–	323	325	–	275	265	–
350~900	14~36	300	12	86	103	–	379	381	–	325	317	–
400~900	16~36	350	14	89	10	–	411	416	–	257	361	–
450~900	18~36	400	16	94	106	–	465	468	–	408	403	–
500~900	20~36	450	18	97	111	–	522	525	–	459	455	–
550~900	22~36	500	20	102	119	–	573	584	–	508	509	–
650~900	26~36	600	24	116	140	–	690	708	–	614	612	–

Weldolets, Sockolets, Threadolets Dimensions & Weights

Referenced Weight Lists Outlet kg
Branch Nominal Size		BW Outlet			SW Outlet		THRD Outlet
DN	NPS	ST D	X S	Sc h 1 6 0	3000	6000	3000	6000
6	1/8	0.04	0.05	–	0.05	–	0.05	–
8	1/4	0.04	0.05	–	0.05	–	0.05	–
10	3/8	.0.06	0.07	–	0.09	–	0.09	–
15	1/2	0.11	0.13	0.18	0.16	0.35	0.17	0.32
20	3/4	0.16	0.18	0.20	0.20	0.47	0.22	0.47
25	1	0.32	0.34	0.40	0.42	0.68	0.43	0.65
32	1 1/4	0.38	0.42	0.50	0.59	1.10	0.61	0.96
40	1 1/2	0.57	0.60	0.70	0.70	1.30	0.69	1.28
50	2	0.85	0.90	1.10	1.10	2.45	1.10	2.15
65	2 1/2	1.28	1.35	2.00	1.40	–	1.52	–
80	3	1.88	2.00	3.20	2.30	–	2.50	–
90	3 1/2	2.20	2.40	–	–	–	–	–
100	4	2.80	3.20	6.00	4.20	–	4.10	–
125	5	5.70	6.80	9.80	–	–	–	–
150	6	7.20	11.0	16.0	–	–	–	–
200	8	10.8	19.2	31.0	–	–	–	–
250	10	17.0	19.5	–	–	–	–	–
300	20	25.6	29.6	–	–	–	–	–
350	14	27.0	32.0
400	16	36.0	41.7
450	18	48.2	55.8
500	20	58.5	76.0
600	24	149	152

MSS SP 97 Weldolet ASTM A105,A105N Weldolet

ASTM A105 Weldolet is a pipe branch welding fitting manufactured according to the ASTM A105 carbon steel standard. It is designed for safely welding branch pipes onto main pipelines and is widely used in industrial piping systems for petroleum, chemical, power, and natural gas industries. Featuring excellent mechanical strength, weldability, and pressure resistance, it effectively reduces stress concentration, ensuring reliable branch connections and long-term operational reliability.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Cu	Ni	Cr	Mo	V
ASTM A105	MIN		0.60			0.10
ASTM A105	MAX	0.35	1.05	0.035	0.040	0.35	0.40	0.40	0.30	0.12	0.08
ASTM A105N	MIN		0.600
ASTM A105N	MAX	0.350	1.050	0.040	0.050		0.400		0.300	0.120	0.080

Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %	HARDNESS
ASTM A105	485 min	250 min	22 min	30 min	197 max
ASTM A105N	485min	250 min	22 min	30 min	197 max

MSS SP-97 Pipe Weldolet – ASTM A182 F304

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F304	MIN						8.0	18.0
ASTM A182 F304	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F304H	MIN	0.04					8.00	18.00
ASTM A182 F304H	MAX	0.10	2.00	0.045	0.030	1.00	11.00	20.00
ASTM A182 F304L	MIN						8.00	18.00
ASTM A182 F304L	MAX	0.03	2.00	0.045	0.030	1.00	13.00	20.00		0.10

Mechanical Property

MATERIAL	ASTM A182 F304	ASTM A182 F304H	ASTM A182 F304L
T.S (MPA)	515 min	515 min	485 min
Y.S (MPA)	205 min	205 min	170 min
EL %	30 min	30 min	30 min
R/A %	50 min	50 min	50 min

MSS SP-97 Weldolet, ASTM A182 F22, 3000 LB

Alloy steel weldolet is a kind of key pipe fittings used for connecting branch pipe and main pipe in pipeline system, the main function is to connect the branch pipe firmly by welding after opening holes on the main pipe, meanwhile ensure the sealing, pressure resistance and structural strength of pipeline system. The material is made of alloy steel (such as chrome molybdenum steel, nickel-based alloy, etc.), which is suitable for high temperature, high pressure, corrosive and other complex working conditions, widely used in petrochemical, electric power, coal chemical, natural gas and other industrial fields.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A182 F22 CL1，CL3	MIN	0.05	0.30					2.00	0.87
ASTM A182 F22 CL1，CL3	MAX	0.15	0.60	0.04	0.04	0.50		2.50	1.13

Mechanical Property

MATERIAL	ASTM A182 F22 CL1	ASTM A182 F22 CL3
T.S (MPA)	415min	515min
Y.S (MPA)	205min	310min
EL %	20min	20min
R/A %	35min	30min
HARDNESS	170	156-207

Weldolet Fittings Suppliers

We are a professional supplier of butt weld weldolets, boasting extensive manufacturing experience and a rigorous quality control system. Products are strictly manufactured in accordance with MSS SP-97 or customer-specified standards, utilizing materials including carbon steel, low-alloy steel, and stainless steel. They are suitable for high-pressure piping systems in industries such as petroleum, chemical, power generation, natural gas, and shipbuilding.

Our butt weld weldolets offer the following advantages:

– High-Quality Materials: Premium carbon steel ensures mechanical strength and pressure resistance

– Standardized Dimensions: Strictly customized to MSS SP-97 or client specifications for installation compatibility

– Precision Welding: Flat weld surfaces ensure reliable joints and minimize stress concentration

– Diverse Specifications: Available in various diameters, long/short radii, and 45° or 90° branch configurations

– Timely Delivery: Supports bulk production and expedited shipping to meet urgent project deadlines

Whether for large-scale industrial pipeline projects or customized small-batch requirements, we deliver high-quality, reliable butt-welded branch seat solutions that ensure safe and efficient pipeline system operation.

Differences between Weldolet, Sockolet, and Threadolet

Connection Type	Advantages	Limitations	Suitable Applications
Weldolet	High pressure resistance, excellent sealing, long service life	Complex welding process, higher cost	High-temperature, high-pressure, or corrosive environments
Threadolet	Easy installation, no welding required	Low pressure resistance (≤PN16), prone to leakage due to vibration	Low-pressure, non-corrosive media
Sockolet	Reduced welding workload, suitable for small-diameter branches	Limited pipe diameter (typically ≤DN50), potential for media accumulation	Small and medium diameter, medium and low pressure pipelines

The post MSS SP- 97 Weldolet Specification appeared first on Supplier of Quality Forged Fittings-Flanges.

SS316L Pipe Fittings & Flanges

Z0065c — Fri, 15 Aug 2025 02:00:00 +0000

On July 16, 2025, our domestic customer sent us another inquiry. This customer had already purchased from us several times in recent months, and our partnership was very strong. This time, their request included a variety of SS316L pipe fittings and flanges. Upon receiving the inquiry, we quickly developed a detailed quotation proposal and provided recommendations on the optimal material and process based on the customer’s operating environment, ensuring the product’s corrosion resistance and long-term stability. The customer was very satisfied with our quotation and service and placed an order the next day.

Product List

ITEM	DESCRIPTION	QUANTITY	UNIT
1	WN RF CL300 A182-F316L ASME B16.5 SCH40S	6	piece
2	Concentric Reducer ASTM A403 Gr.WP316L ASME B16.9 SCH80S×SCH80S	3	piece
3	Threaded Union 1-1/4″-12UNF-2B×1FNPT 3000# ASTM A182.Gr.F316L MSS-SP-83	3	piece
4	Threaded Union 1-3/4″-12UNF-2B×1-1/2FNPT 3000#ASTM A182.Gr.F316L MSS-SP-83	3	piece

Inspection Photos

ASME B16.9 Concentric Reducer Specification

Stainless steel 316 concentric reducers are fittings used to connect two pipes of different diameters. Their primary function is to alter the pipe diameter and flow velocity, ensuring smooth fluid flow within the piping system.

Size Range	3/4″ – 60″ / DN20 – 1500
Thickness Schedule	SCH 10 – SCH 80, SCH 160, XXS
America Standard	ANSI / ASME B16.9
Japan Standard	JIS B2311/2312/2313
Germany Standard	DIN2605/2615/2616/2617
Europe Standard	EN10253
Stainless Steel	ASTM A403 WP304/304L/304H, 316/316L, 310S, 317,347,904L

ASTM A403 WP316L Pipe Fittings Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A403 WP316	MIN						10.0	16.0	2.00
ASTM A403 WP316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00
ASTM A403 WP316L	MIN						10.00	16.00
ASTM A403 WP316L	MAX	0.03	2.00	0.05	0.03	1.00	14.00	18.00

ASTM A403 WP316L Pipe Fittings Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A403 WP316	515 min	205 min	28 min
ASTM A403 WP316L	485 min	170 min	28 min

MSS SP-83 Threaded Union Specification

The threaded union is the most widely used type of union, characterized by its use of threaded connections for piping. It consists of three main components: a male end with external threads, a female end with internal threads, and a nut. By rotating the nut, the sealing surfaces of the male and female ends can be tightly aligned to achieve connection and sealing. The thread forms can be BSP, NPT, G, etc., and the connection is further secured by a locking nut and seal ring.

Size:	1/8″ to 3″ / DN6 to DN80
Pressure:	3000 LB
Connection:	Threaded Union
Thread Type:	Female and Male NPT, BSPP and BSPT
Stainless Steel:	ASTM A182 F304, F316, F317, F310, F321

Class 3000 Threaded Union Dimensions

Nominal Size		Pipe End	Wall	Bone	Male Flange	Nut	THRD Per Inch	Bearing	Length Assem	Clear Assem Nut
DN	NPS	Amin	Cmin	D	Fmin	Gmin	H	Jmin	Lnom	N
6	1/8	14.7	2.4	8.46.4	3.2	3.2	16	1.2	41.4	51
8	1/4	19.1	3.0	11.19.4	3.2	3.2	16	1.2	41.4	51
10	3/8	22.9	3.2	14.313.5	3.4	3.4	14	1.4	46.0	56
15	1/2	27.7	3.7	17.917.1	3.7	3.7	14	1.5	49.0	59
20	3/4	33.5	3.9	23.021.4	4.1	4.1	11	1.7	56.9	66
25	1	41.4	4.5	29.027.7	4.6	4.4	11	1.9	62.0	79
32	11/4	50.5	4.9	37.735.4	5.3	5.2	10	2.1	71.1	94
40	11/2	57.2	5.1	43.541.2	5.8	5.6	10	2.3	76.5	112
50	2	70.1	5.5	55.652.1	6.6	6.4	10	2.7	86.1	132
65	21/2	85.3	7.0	66.364.3	7.5	7.1	8	3.1	102.4	150
80	3	102.4	7.6	82.677.3	8.3	8.0	8	3.5	109.0	176

Specification of Weld Neck Flange

316L weld neck flanges are pipe connectors made from 316L stainless steel. They achieve a secure connection by butt-welding the pipe and are commonly used in applications involving high pressure, high temperature, and highly corrosive media. The high structural strength and excellent sealing properties of 316L weld neck flanges ensure the long-term safe operation of pipeline systems.

Shape Type	Regular and Long Neck
Sealing Face	RF, FF, FTJ
Size Range	1/2″ – 48″/ DN15 – DN1200
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500lb
Standard	ASME B16.5, ASME B16.47 Series A/B
Stainless Steel	ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L

ASTM A182 F316L Flanges Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F316	MIN						10.0	16.0	2.00
ASTM A182 F316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10
ASTM A182 F316L	MIN						10.00	16.0	2.00
ASTM A182 F316L	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10

ASTM A182 F316L Flanges Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F316	515 min	205 min	30 min	50 min
ASTM A182 F316L	485 min	170 min	30 min	50 min

Advantages of SS316L

1. Excellent Corrosion Resistance

SS316L contains 2-3% molybdenum in its chemical composition, which gives it significantly better corrosion resistance than 304 stainless steel in chloride environments. It effectively resists pitting and crevice corrosion, making it ideal for marine environments, coastal areas, and applications involving chloride-containing media.

2. Excellent Welding Performance

“L” stands for “Low Carbon.” SS316L has a carbon content below 0.03%, significantly reducing the risk of carbide precipitation (also known as “sensitization”) during welding. This property prevents intergranular corrosion near the weld seam, ensuring the integrity and long-term stability of the welded joint in corrosive environments. Therefore, in pipeline systems requiring extensive welding, SS316L is a superior choice over 316.

3. High strength at high temperatures

SS316L maintains high tensile strength and creep strength even at high temperatures. This makes it suitable for high-temperature, high-pressure piping systems, such as heat exchangers and pressure vessels.

Applications of SS316L Fittings and Flanges

Petroleum and Natural Gas Industry

Chemical and Pharmaceutical Industry

Marine Engineering and Shipbuilding

Food and Beverage Processing

Power and Nuclear Energy

The post SS316L Pipe Fittings & Flanges appeared first on Supplier of Quality Forged Fittings-Flanges.

316L Stainless Steel Forged Fittings

Z0065c — Thu, 07 Aug 2025 02:00:00 +0000

316L stainless steel forged fittings have become core components in numerous industrial applications due to their exceptional performance and reliability. These fittings are made from 316L stainless steel, a material that combines excellent corrosion resistance, mechanical strength, and weldability. The forging process further enhances their structural integrity, making them suitable for harsh environments with stringent requirements for safety and performance. Stainless steel forged fittings come in a wide variety of types and are primarily used for connecting and transporting fluid or gas media. They find extensive application across multiple industries, including petroleum, chemicals, power, pharmaceuticals, and food processing.

Specifications of Stainless Steel Forged Fittings

Size	1/2″NB TO 4″NB IN
Standard	ASTM A182 / ASME SA182
Dimensions	ANSI/ASME B16.11 & BS3799, etc.
Class	2000LBS, 3000LBS, 6000LBS, 9000LBS, etc.
Type	Socketweld Fittings, Threaded Fittings

Chemical Composition of Grade 316L Stainless Steel Forged Fittings

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F316L	MIN						10.00	16.0	2.00
ASTM A182 F316L	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10

Mechanical Properties of ASTM A182 F316L Forged Fittings

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F316L	485 min	170 min	30 min	50 min

316L Stainless Steel Forged Fittings Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 316L	1.4404 / 1.4435	S31603	SUS 316L	316S11 / 316S13	03Ch17N14M3 / 03Ch17N14M2	Z3CND17‐11‐02 / Z3CND18‐14‐03	X2CrNiMo17-12-2 / X2CrNiMo18-14-3

Types of Forged Fittings

Forged fittings are primarily divided into two categories: socket weld fittings and threaded fittings.

Socket weld fittings: Socket weld fittings are widely used in piping systems. They feature an end with a socket-like opening, into which the pipe is inserted and then welded. 316L stainless steel socket weld fittings provide a secure and sealed connection. These fittings are typically used in applications where pipe sizes are relatively small and high-integrity connections are required, such as in chemical and petrochemical plants.

Threaded fittings: Threaded fittings have internal or external threads machined at their ends. They adhere to different thread standards, such as NPT and BSP. Threaded fittings are commonly used in medium-to-low-pressure applications and in systems that may require frequent modifications or maintenance.

Socket Weld Fittings Dimension

Socket weld fittings primarily include socket weld caps, socket weld elbows, socket weld tee, socket weld cross, and socket weld coupling. These fittings are connected to pipes via socket weld joints and are widely used in high-pressure, small-diameter fluid conveyance systems. They feature a compact structure, easy installation, and excellent sealing performance.

Socket Weld Elbow + Tee +Cross Dimension

Nominal Size		Socket Bore Dia.	Bore Dia. of Fittings			Socket Wall Thickness						Body Wall			Depth of Socket	Center to Bottom of Socket
DN	NPS	B	D			C						G min			J min	A
			3000	6000	9000	3000		6000		9000		3000	6000	9000		90 Elbow,Tee,Cross			45 Elbow
			3000	6000	9000	ave	min	ave	min	ave	min	3000	6000	9000		3000	6000	9000	3000	6000	9000
6	1/8	10.9	6.1	3.2		3.18	3.18	3.96	3.43			2.41	3.15		9.5	11	11		8	8
8	1/4	14.3	8.5	5.6		3.78	3.3	4.6	4.01			3.02	3.68		9.5	11	13.5		8	8
10	3/8	17.7	11.8	8.4		4.01	3.5	5.03	4.37			3.2	4.01		9.5	13.5	15.5		8	11
15	1/2	21.9	15	11	5.6	4.67	4.09	5.97	5.18	9.53	8.18	3.73	4.78	7.47	9.5	15.5	19	25.5	11	12.5	15.5
20	3/4	27.3	20.2	14.8	10.3	4.9	4.27	6.96	6.04	9.78	8.56	3.91	5.56	7.82	12.5	19	22.5	28.5	13	14	19
25	1	34	25.9	19.9	14.4	5.69	4.98	7.92	6.93	11.38	9.96	4.55	6.35	9.09	12.5	22.5	27	32	14	17.5	20.5
32	11/4	42.8	34.3	28.7	22	6.07	5.28	7.92	6.93	12.14	10.62	4.85	6.35	9.7	12.5	27	32	35	17.5	20.5	22.5
40	11/2	48.9	40.1	33.2	27.2	6.35	5.54	8.92	7.8	12.7	11.12	5.08	7.14	10.15	12.5	32	38	38	20.5	25.5	25.5
50	2	61.2	51.7	42.1	37.4	6.93	6.04	10.92	9.5	13.84	12.12	5.54	8.74	11.07	16	38	41	54	25.5	28.5	28.5
65	21/2	73.9	61.2			8.76	7.62					7.01			16	41			28.5
80	3	89.9	76.4			9.52	8.3					7.62			16	57			32
100	4	115.5	100.7			10.69	9.35					8.56			19	66.5			41

Socket Weld Coupling + Boss + Cap Dimension

Nominal Size		Socket Bore Dia.	Bore Dia. of Fittings			Socket Wall Thickness						Body Wall			Depth of Socket	Laying Lengths	Laying Lengths	End Wall Thickness			Center to Bottom of Socket
DN	NPS	B	D			C						G min			J min	E	F	K min			A		H
			3000	6000	9000	3000		6000		9000		3000	6000	9000				3000	6000	9000	3000	6000	3000	6000
			3000	6000	9000	ave	min	ave	min	ave	min	3000	6000	9000				3000	6000	9000	3000	6000	3000	6000
6	1/8	10.9	6.1	3.2		3.18	3.18	3.96	3.43			2.41	3.15		9.5	6.5	16.0	4.8	6.4
8	1/4	14.3	8.5	5.6		3.78	3.30	4.60	4.01			3.02	3.68		9.5	6.5	16.0	4.8	6.4
10	3/8	17.7	11.8	8.4		4.01	3.50	5.03	4.37			3.20	4.01		9.5	6.5	17.5	4.8	6.4		37		9.5
15	1/2	21.9	15.0	11.0	5.6	4.67	4.09	5.97	5.18	9.53	8.18	3.73	4.78	7.47	9.5	9.5	22.5	6.4	7.9	11.2	41	51	9.5	11
20	3/4	27.3	20.2	14.8	10.3	4.90	4.27	6.96	6.04	9.78	8.56	3.91	5.56	7.82	12.5	9.5	24.0	6.4	7.9	12.7	51	60	11	13
25	1	34.0	25.9	19.9	14.4	5.69	4.98	7.92	6.93	11.38	9.96	4.55	6.35	9.09	12.5	12.5	28.5	9.6	11.2	14.2	60	71	13	16
32	1 1/4	42.8	34.3	28.7	22.0	6.07	5.28	7.92	6.93	12.14	10.62	4.85	6.35	9.70	12.5	12.5	30.0	9.6	11.2	14.2	71	81	16	17
40	1 1/2	48.9	40.1	33.2	27.2	6.35	5.54	8.92	7.80	12.70	11.12	5.08	7.14	10.15	12.5	12.5	32.0	11.2	12.7	15.7	81	98	17	21
50	2	61.2	51.7	42.1	37.4	6.93	6.04	10.92	9.50	13.84	12.12	5.54	8.74	11.07	16.0	19.0	41.0	12.7	15.7	19.0	98	151	21	30
65	2 1/2	73.9	61.2			8.76	7.62					7.01			16.0	19.0	43.0	15.7	19.0		151		30
80	3	89.9	76.4			9.52	8.30					7.62			16.0	19.0	44.5	19.0	22.4		184		57
100	4	115.5	100.7			10.69	9.35					8.56			19.0	19.0	48.0	22.4	28.4		201		66

Threaded Fittings Dimension

Threaded pipe fittings include threaded elbow, threaded tee, threaded cross, threaded coupling, threaded cap, threaded union, threaded nipple, threaded hex nipple, tapered threaded nipple, threaded plug, and threaded reducer. These fittings are connected via threaded connections and are suitable for small-diameter pipeline systems that do not require welding and involve frequent installation and disassembly. They are widely used in industries such as petroleum, chemicals, and equipment piping.

Threaded Elbow + Tee + Cross Dimension

Nominal Size		Center-to-End						Outside Diameter of Band			Wall Thickness			Length of Thread
DN	NPS	A						H			G min			L5 min	L2 min
		90° Elbows, Tees, Crosses			45 ° Elbows			H			G min
		2000	3000	6000	2000	3000	6000	2000	3000	6000	2000	3000	6000
6	1/8 1/4 3/8	21	21	25	17	17	19	22	22	25	3.18	3.18	6.35	6.4	6.7
8	1/4	21	25	28	17	19	22	22	25	33	3.18	3.30	6.60	8.1	10.2
10	3/8	25	28	33	19	22	25	25	33	38	3.18	3.51	6.98	9.1	10.4
15	1/2	28	33	38	22	25	28	33	38	46	3.18	4.09	8.15	10.9	13.6
20	3/4	33	38	44	25	28	33	38	46	56	3.18	4.32	8.53	12.7	13.9
25	1	38	44	51	28	33	35	46	56	62	3.68	4.98	9.93	14.7	17.3
32	1 1/4	44	51	60	33	35	43	56	62	75	3.89	5.28	10.59	17.0	18.0
40	1 1/2	51	60	64	35	43	44	62	75	84	4.01	5.56	11.07	17.8	18.4
50	2	60	64	53	43	44	52	75	84	102	4.27	7.14	12.09	19.0	19.2
65	2 1/2	76	83	95	52	52	64	92	102	121	5.61	7.65	15.29	23.6	28.9
80	3	86	95	106	64	64	79	109	121	146	5.99	8.84	16.64	25.9	30.5
100	4	106	114	114	79	79	79	146	152	152	6.55	11.18	18.67	27.7	33

Threaded Coupling + Boss + Cap Dimension

Nominal Size		End-to-End	End-to-End		Outside Diameter		End Wall		Length of Thread
DN	NPS	W	P		D		G min		L5 min	L2 min
DN	NPS	3000 & 6000	3000	6000	3000	6000	3000	6000	L5 min	L2 min
6	1/8	32	19		16	22	4.8		6.4	6.7
8	1/4	35	25	27	19	25	4.8	6.4	8.1	10.2
10	3/8	38	25	27	22	32	4.8	6.4	9.1	10.4
15	1/2	48	32	33	28	38	6.4	7.9	10.9	13.6
20	3/4	51	37	38	35	44	6.4	7.9	12.7	13.9
25	1	60	41	43	44	57	9.7	11.2	14.7	17.3
32	1 1/4	67	44	46	57	64	9.7	11.2	17.0	18.0
40	1 1/2	79	44	48	64	76	11.2	12.7	17.8	18.4
50	2	86	48	51	76	92	12.7	15.7	19.0	19.2
65	2 1/2	92	60	64	92	108	15.7	19.0	23.6	28.9
80	3	108	65	68	108	127	19.0	22.4	25.9	30.5
100	4	121	68	75	140	159	22.4	28.4	27.7	33.0

Threaded Plug + Bushing Dimension

Nominal Size		Length		Width Flats		Length		Hex Height
DN	NPS	Amin	B min	C min	E nom	D min	H min	G min	F nom
6	1/8	10	6	7	10	35	6		11
8	1/4	11	6	10	14	41	6	3	16
10	3/8	13	8	11	18	41	8	4	18
15	1/2	14	10	14	21	44	8	5	22
20	3/4	16	11	16	27	44	10	6	27
25	1	19	13	21	33	51	10	6	36
32	1 1/4	21	14	24	43	51	14	7	46
40	1 1/2	21	16	28	48	51	16	8	50
50	2	22	18	32	60	64	18	9	65
65	2 1/2	27	19	36	73	70	19	10	75
80	3	28	21	41	89	70	21	10	90
100	4	32	25	65	114	76	25	13	115

Forging Process for Forged Pipe Fittings

① Die Forging

Suitable for small pipe fittings such as tees, crosses, and elbows. These fittings use socket welds and threads, and their complex shapes require die forging.

The raw material for forging should be rolled profiles, such as bars, thick-walled tubes, or plates. When using ingots as raw material, the ingots should be pre-rolled into bars or forged into ingots for use as die forging raw material to eliminate defects such as segregation and porosity in the ingots.

After heating, the billet is placed into the die for forging, where pressure causes the metal to flow and fill the die cavity. If the forged billet has flash, it must undergo a stamping process to remove the remaining flash, thereby completing all die forging operations.

② Free Forging

Special-shaped or unsuitable pipe fittings can be manufactured using free forging processes. Free forging should produce the approximate shape of the pipe fitting; for example, tees and branches should be forged.

③ Cutting.

Some tubular fittings can be directly cut from bars or thick-walled tubes to form the desired shape, such as double-sleeve couplings and union fittings. When processing metallic materials, the fiber flow direction should be roughly parallel to the axial direction of the fitting. Tees, crosses, elbows, and fittings shall not be directly cut from reinforcing bars to form the desired shape.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

316L Stainless Steel Forged Fittings Exported Countries

We Export 316L stainless steel forged fittings to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

The post 316L Stainless Steel Forged Fittings appeared first on Supplier of Quality Forged Fittings-Flanges.

316 Stainless Steel Threaded Nipple Order

Z0065c — Tue, 05 Aug 2025 02:00:00 +0000

On July 2, 2025, a long-standing customer from Nigeria sent us an inquiry for 316 Stainless Steel Threaded Nipple. Both stainless steel and threaded nipples are our core products. After receiving the quote, the customer placed an order two weeks later.

ZIZI is a company specializing in the production and processing of pipes and fittings. Our pipes and fittings are primarily used in the chemical, petroleum, natural gas, water conservancy, power generation, and marine engineering sectors. Our products include seamless pipes and welded pipes of various sizes, butt-weld fittings, high-pressure forged fittings, and flanges. Materials include carbon steel, stainless steel, alloy steel, cryogenic steel, duplex steel, and base alloys.

Inspection Photos

What is a 316 stainless steel threaded Nipple?

A threaded nipple is a short pipe fitting with threads on both ends, commonly used to connect two sections of pipe, valves, or equipment. It is easy to install and does not require welding. The 316 stainless steel short section is made of austenitic stainless steel containing molybdenum (Mo), which offers stronger corrosion resistance than 304 stainless steel. It is particularly suitable for working environments containing chloride ions or acidic/alkaline media.

ASTM A733 Threaded Nipple Specification

Specification	Threaded Nipple
Size	1/4” – 12” / DN8 – DN300
Wall Thickness	Sch 10 – Sch 160 / XXS
Standard	ASTM A733
End	PE, BE,THD
Thread Type	NPT, PT, BSPP, BSPT, PF
Stainless Steel	ASTM A312 TP304/304L/304H, 316/316L, 310S, 317,347,904L,
Duplex Stainless Steel	S32205, S31803, 32750, 32760, S32550

ASTM A182 F316 Threaded Fittings Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F316	MIN						10.0	16.0	2.00
ASTM A182 F316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10
ASTM A182 F316L	MIN						10.00	16.0	2.00
ASTM A182 F316L	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10

ASTM A182 F316 Threaded Fittings Mechanical Property

MATERIAL	ASTM A182 F316	ASTM A182 F316L
T.S (MPA)	515 min	485 min
Y.S (MPA)	205 min	170 min
EL %	30 min	30 min
R/A %	50 min	50 min

Classification of Threaded Nipple

One end threaded nipple

One end threaded nipple have threads machined on one end and a flat surface or socket on the other end, designed for connecting pipes that require threaded connections on one end. This structure makes them suitable for specific connection applications in piping systems. For example, when connecting equipment with an internal threaded joint to a pipe, the non-threaded end of the one end threaded nipple can be welded to the pipe or connected in another manner, while the threaded end is connected to the equipment’s internal threaded joint via the threaded connection.

Both end threaded nipple

Both end threaded nipple are threaded, making it suitable for connecting pipes or fittings that require threaded connections on both ends. This provides greater flexibility in pipe connections. Both end threaded nipple can be used to directly connect two pipes with external threads, or to connect a pipe with external threads to a device or fitting with internal threads.

ASTM A733 Threaded Nipple Dimensions

Nominal Size		OD of Pipes	Lengths of Thread	Wall of pipes	Pipe Nipple Lengths
DN	NPS	OD	L 2 min	T	L
DN	NPS	OD	L 2 min	T	Ⅰ	Ⅱ	Ⅲ
6	1/8	10.3	6.7	STD,XS Sch40,Sch80	50	75	100
8	1/4	13.7	10.2
10	3/8	17.1	10.4
15	1/2	21.3	13.6	STD,XS Sch40,Sch80	50	75	100
50	3/4	26.7	13.9
25	1	33.4	17.3
32	11/4	42.2	18.0	STD,XS Sch40,Sch80	75	100	150
40	11/2	48.3	18.4
50	2	60.3	19.2
65	21/2	73.0	28.9	STD,XS Sch40,Sch80	100	150	200
80	3	88.9	30.5
90	31/2	101.6	31.8
100	4	114.3	33.0	STD,XS Sch40,Sch80	100	150	200
125	5	141.3	35.7
150	6	168.3	38.4
200	8	219.1	43.5	STD,XS Sch40,Sch80	150	200	250
250	10	273.0	48.9
300	12	323.8	54.0

Why choose us?

We offer 316 stainless steel threaded nipple that comply with ASTM A312/A733 standards, supporting custom lengths, thread types, and special processing requirements. All products come with material test certificates (MTC 3.1) and third-party inspection services. With ample inventory, timely delivery, and reliable quality, we are your trusted stainless steel pipe fitting supplier.

For quotes, samples, or more information about 316 stainless steel threaded fittings, please feel free to contact us at any time!

Applicable Industries

Chemical Pipeline and Anti-corrosion System

Seawater Desalination Equipment

Food and Pharmaceutical Fluid Conveyance System

Oil and Gas Pipeline Connection

Water Treatment and Environmental Protection Equipment

The post 316 Stainless Steel Threaded Nipple Order appeared first on Supplier of Quality Forged Fittings-Flanges.

Stainless Steel Forged Flanges and Fittings

Z0065c — Mon, 04 Aug 2025 02:00:00 +0000

Stainless steel forged flanges and fittings are high-strength connection components manufactured from stainless steel raw materials through processes such as high-temperature forging, machining, and heat treatment. They are widely used in industrial pipeline systems across industries such as petroleum, natural gas, chemicals, power, shipbuilding, pharmaceuticals, and food processing.

ZIZI is a trusted manufacturer and supplier of stainless steel pipe fittings, offering a wide range of products including elbows, tees, reducers, caps, flanged short sections, and flanges. Our fittings and flanges are manufactured in accordance with ASME B16.11, ASME B16.5, DIN, and JIS standards to ensure high quality, dimensional accuracy, and long-lasting performance. Our products are made from corrosion-resistant materials such as 304/304L, 316/316L, and duplex stainless steel, designed to maintain durability in the most demanding environments. All stainless steel fittings and flanges undergo rigorous quality inspections and are available in various sizes, thicknesses, and pressure ratings. With technical expertise and efficient logistics support, ZIZI provides precision components and seamless connections to global customers.

Features

Material Advantages: Made of stainless steel, it offers excellent corrosion resistance and can withstand erosion from various media such as acids, alkalis, and salts, making it suitable for environments with strong corrosive conditions.

Long Service Life: Stainless steel inherently possesses good oxidation resistance and wear resistance. Combined with high-quality forging processes, stainless steel forged flanges have a longer service life, reducing replacement costs.

Excellent Material Performance: Also made of stainless steel, it offers excellent corrosion resistance and can adapt to various harsh medium environments.

High Structural Strength: The forging process imparts high strength and hardness to the fittings, enabling them to withstand significant pressure and impact forces, ensuring stable performance in high-pressure pipeline systems.

Wide Range of Applications: Fittings can be produced in various specifications and models according to different pipeline design requirements, meeting usage needs under different pressure, temperature, and medium conditions.

ASTM A182 Datasheet

Chemical Properties %

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N	Ti
ASTM A182 F304	MIN						8.0	18.0
ASTM A182 F304	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F304H	MIN	0.04					8.00	18.00
ASTM A182 F304H	MAX	0.10	2.00	0.045	0.030	1.00	11.00	20.00
ASTM A182 F304L	MIN						8.00	18.00
ASTM A182 F304L	MAX	0.03	2.00	0.045	0.030	1.00	13.00	20.00		0.10
ASTM A182 F316	MIN						10.0	16.0	2.00
ASTM A182 F316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10
ASTM A182 F316L	MIN						10.00	16.0	2.00
ASTM A182 F316L	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10
ASTM A182 F317	MIN						11.00	18.00	3.00
ASTM A182 F317	MAX	0.08	2.00	0.05	0.03	1.00	15.00	20.00	4.00
ASTM A182 F321	MIN						9.00	17.00		0.10	5(C+N)
ASTM A182 F321	MAX	0.08	2.00	0.05	0.03	1.00	12.00	19.00			0.70
ASTM A182 F321H	MIN	0.04					9.00	17.00			4（C+N)
ASTM A182 F321H	MAX	0.10	2.00	0.045	0.030	1.00	12.00	19.00			0.7
ASTM A182 F347	MIN						9.00	17.00
ASTM A182 F347	MAX	0.08	2.00	0.045	0.030	1.00	13.00	20.00
ASTM A182 F904L (N08904)	MIN						23.00	19.00	4.00
ASTM A182 F904L (N08904)	MAX	0.02	2.00	0.040	0.030	1.00	28.00	23.00	5.00	0.10

Mechanical Properties

MATERIAL	ASTM A182 F304	ASTM A182 F304H	ASTM A182 F304L	ASTM A182 F316	ASTM A182 F316L	ASTM A182 F317	ASTM A182 F321	ASTM A182 F321H	ASTM A182 F347	ASTM A182 F904L
T.S (MPA)	515 min	515 min	485 min	515 min	485 min	515 min	515 min	515 min	515 min	490 min
Y.S (MPA)	205 min	205 min	170 min	205 min	170 min	205 min	205 min	205 min	205 min	215 min
EL %	30 min	30 min	30 min	30 min	30 min	30 min	30 min	30 min	30 min	35 min
R/A %	50 min	50 min	50 min	50 min	50 min	50 min	50 min	50 min	50 min

Stainless Steel Forged Flanges

Flanges are disc-shaped or ring-shaped parts used to connect pipes, valves, pumps, and other equipment, forming an integrated pipe system through bolt connections.

Stainless steel forged flanges are manufactured from stainless steel materials (such as 304, 316, 316L, etc.) through a forging process. Compared to cast flanges, the forging process eliminates internal defects in the metal, resulting in a denser structure, finer grain size, and better mechanical properties, enabling them to withstand higher pressures and temperatures.

Stainless Steel Flange Types

Weld Neck Flange

Slip On Flange

Blind Flange

Socket Weld Flange

Threaded Flange

Lap Joint Flange

Stainless Steel Forged Fittings

Fittings are components used to change the direction or diameter of pipes or to connect branches. Stainless steel forged fittings are also manufactured using forging techniques and offer similar advantages to forged flanges. They are critical components for ensuring the integrity and reliability of piping systems.

Stainless Steel Forged Fittings Specification

Specifications : ASTM A182 / ASME SA182

Standard : ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97, BS3799

Size : 1/8″ NB to 4″ NB

Type : Socket weld Fittings, Threaded Fittings

Rating Pressure : Threaded End – 2000 /3000/ 6000 LBS. Socket-weld End – 3000 / 6000/ 9000 LBS.

Types of Stainless Steel Forged Fittings

Socket Weld Fittings:

The fitting has an internal bore (socket) into which the pipe is inserted. The connection is then made by a fillet weld on the exterior of the fitting. This means the weld is outside the pipe, preventing it from affecting the pipe’s inner diameter.

Typically available in Class 3000 LBS, 6000 LBS, 9000 LBS, etc.

Socket Weld Cap

Socket Weld Elbow

Socket Weld Tee

Socket Weld Cross

Socket Weld Coupling

Socket Weld Union

Threaded Fittings:

The fitting has internal or external threads (usually NPT or BSPT standards) that connect to the pipe via a threaded connection.

Typically available in Class 2000 LBS, 3000 LBS, 6000 LBS, etc.

Threaded Elbow

Threaded Tee

Threaded Cross

Threaded Coupling

Threaded Cap

Threaded Union

Threaded Nipple

Threaded Hex Nipple

Threaded Swage Nipple

Threaded Plug

Threaded Bushing

Applications

Chemical and Petrochemical Industries

Oil and Gas Industry

Food Processing and Pharmaceutical Industries

Power Generation

Water Treatment and Wastewater Facilities

Pulp and Paper Manufacturing

Marine Engineering

General Industrial Applications

Manufacturing Process: Forging vs. Casting

Forging

By heating stainless steel billets and then applying external pressure (such as hammering or stamping), plastic deformation occurs, ultimately forming the final shape.

Performance Characteristics:

High strength and toughness: Forged parts have a uniform and dense internal structure, enabling them to withstand higher pressures, impacts, and fatigue loads.

Durability: Forged components have a long service life and are particularly suitable for long-term use in harsh conditions such as high temperatures, high pressures, and high stresses.

High strength and toughness: The strength and impact resistance of forged components far exceed those of castings.

Better sealing performance: Forged components lack casting defects such as porosity and inclusions, ensuring no leaks at connection points.

Durability: The structure is more compact, resulting in a longer service life.

Casting

Stainless steel is heated to a molten state and then poured into a pre-prepared mold. After cooling and solidifying, it is demolded to form the final product.

Performance characteristics:

Lower mechanical properties: Due to potential internal defects, castings typically have lower strength, toughness, fatigue strength, and impact resistance compared to forgings.

Prone to defects: Internal defects such as porosity, shrinkage cavities, and inclusions may exist, affecting strength and sealing performance.

Poor sealing performance: Internal defects may serve as potential pathways for fluid leakage, posing greater risks under high-pressure conditions.

Conclusion:

Although the casting process is cost-effective, for critical applications in industries such as petroleum, chemicals, and nuclear power that demand the highest levels of safety and reliability, the forging process is undeniably the preferred choice. Its superior mechanical properties and sealing performance ensure the long-term stable operation of pipeline systems and minimize safety risks to the greatest extent possible.

The post Stainless Steel Forged Flanges and Fittings appeared first on Supplier of Quality Forged Fittings-Flanges.

Stainless Steel Pipe Nipple

Z0065c — Thu, 24 Jul 2025 02:00:00 +0000

Stainless steel pipe nipple is a commonly used fittings in the pipeline connection, more welding or threaded form of connecting pipeline, through the threads and other pipeline or equipment connection, play a role in extending the pipeline, changing the direction of the pipeline or connecting the pipeline of different diameters, and other roles. Commonly used in low and medium pressure piping system. The material is stainless steel, with good corrosion resistance, high temperature resistance and strength.

Threaded nipples are mainly divided into one end threaded nipples and both end threaded nipples. One end of the external thread and the other end of the flat or beveled short section is called a single threaded section; both ends are external threaded section is called a double threaded section.

ZIZI specialize in selling all kinds of stainless steel pipe fittings, tubes, plates, flanges, bolts and nuts, our products are widely used in many fields, from precision machinery manufacturing to warm home decoration and even high-end aerospace industry. We have become a trusted choice for many industries due to our superior product quality and wide range of applications. Not only do we offer a wide range of products, but we can also provide customized processing services according to the specific needs of our customers, ensuring that your expectations are accurately met every time we work together. With advanced production equipment and strict quality management system, we are committed to providing high-quality piping solutions to customers worldwide. Welcome to contact us.

ASTM A733 Threaded Pipe Nipple Specification

Specification	Threaded Nipple
Size	1/4” – 12” / DN8 – DN300
Wall Thickness	Sch 10 – Sch 160 / XXS
Standard	ASTM A733
End	PE, BE,THD
Thread Type	NPT, PT, BSPP, BSPT, PF
Stainless Steel	ASTM A312 TP304/304L/304H, 316/316L, 310S, 317,347,904L,
Duplex Stainless Steel	S32205, S31803, 32750, 32760, S32550

Classification of Threaded Nipples

One end threaded nipple

The single-ended threaded nipple is machined with a thread on one end only and a flat or socket on the other end, and is used for connecting pipes that require a threaded connection on one end. This construction allows it to be used for specific connection purposes in piping systems. For example, when a piece of equipment with a female connector needs to be connected to a pipeline, the unthreaded end of the single threaded nipple can be welded to the pipeline or connected in some other way, while the threaded end is threaded to the female connector of the equipment.

In the petrochemical industry, if there is a small process pipeline, there is a need for regular replacement of filter cartridges, the filter inlet and outlet for the female threaded interface. In this case, a single threaded nipple can be used to connect the filter to the pipeline. The unthreaded end of the single-threaded nipple is welded to the pipe to ensure a solid connection, while the threaded end is connected to the filter’s female connector, making it easy to disassemble and replace the filter.

Both end threaded nipple

Double-ended threaded nipple has threads on both ends, which can connect pipes or fittings that need threaded connection on both ends. This makes it more flexible in piping connections. Double-ended threaded nipples can be used directly to connect two pipes with external threads, or to connect a pipe with an external thread to a piece of equipment or pipe fitting with an internal thread.

In natural gas transmission piping systems, double-threaded nipples are used when it is necessary to connect two short pipes with external threads. One end of the double-ended threaded nipple is connected to the male thread of one pipe, and the other end is connected to the male thread of the other pipe, and the pipes are connected by thread tightening to ensure that the natural gas is transported in a sealed manner.

ASTM A733 Pipe Nipple Dimensions

Nominal Size		OD of Pipes	Lengths of Thread	Wall of pipes	Pipe Nipple Lengths
DN	NPS	OD	L 2 min	T	L
DN	NPS	OD	L 2 min	T	Ⅰ	Ⅱ	Ⅲ
6	1/8	10.3	6.7	STD,XS Sch40,Sch80	50	75	100
8	1/4	13.7	10.2
10	3/8	17.1	10.4
15	1/2	21.3	13.6	STD,XS Sch40,Sch80	50	75	100
50	3/4	26.7	13.9
25	1	33.4	17.3
32	11/4	42.2	18.0	STD,XS Sch40,Sch80	75	100	150
40	11/2	48.3	18.4
50	2	60.3	19.2
65	21/2	73.0	28.9	STD,XS Sch40,Sch80	100	150	200
80	3	88.9	30.5
90	31/2	101.6	31.8
100	4	114.3	33.0	STD,XS Sch40,Sch80	100	150	200
125	5	141.3	35.7
150	6	168.3	38.4
200	8	219.1	43.5	STD,XS Sch40,Sch80	150	200	250
250	10	273.0	48.9
300	12	323.8	54.0

Material & Grades of Threaded Pipe Nipple

Common material grades of stainless steel threaded nipples include A182 F304/304L/304H – F316/316L – F317 – F310S – F321 – F347 – F904, etc., of which 304 is the most commonly used general-purpose stainless steel, suitable for water, air, and general corrosive environments; whereas 316/316L contains molybdenum, which has stronger corrosion resistance, and is commonly used in chemicals, seawater, and other more corrosive applications. and other more corrosive occasions. Choosing the right material according to the usage environment and cost requirements is the key to ensure the safety and durability of the piping system.

ASTM A182 Stainless Steel Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F304	MIN						8.0	18.0
ASTM A182 F304	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F304L	MIN						8.00	18.00
ASTM A182 F304L	MAX	0.03	2.00	0.045	0.030	1.00	13.00	20.00		0.10
ASTM A182 F316	MIN						10.0	16.0	2.00
ASTM A182 F316	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10
ASTM A182 F316L	MIN						10.00	16.0	2.00
ASTM A182 F316L	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.0	3.00	0.10

ASTM A182 Stainless Steel Mechanical Property

MATERIAL	ASTM A182 F304	ASTM A182 F304L	ASTM A182 F316	ASTM A182 F316L
T.S (MPA)	515 min	485 min	515 min	485 min
Y.S (MPA)	205 min	170 min	205 min	170 min
EL %	30 min	30 min	30 min	30 min
R/A %	50 min	50 min	50 min	50 min

Fields of Application

Water Supply and Drainage System: Construction, municipal and industrial water treatment.

Petrochemical: Oil, natural gas, chemical fluid transportation pipeline.

Food & Beverage: Beer, milk, beverage production line, high hygiene requirements.

Pharmaceutical industry: Pharmaceutical production, transportation, the requirement of pure materials without pollution.

Heating, cooling and ventilation systems.

Fire Fighting System: Ensure the durability and reliability of fire fighting pipes.

Marine and offshore engineering: seawater corrosion resistance.

Precautions for Packaging

Threaded pipe nipple should be especially protected from contact with sharp objects to prevent scratches or bruises when packaging. Therefore we use plastic pipe caps to protect the threaded ports.

Plastic film is one of the commonly used materials in the packaging of threaded short sections. It has good flexibility and moisture resistance. For some small threaded nipples, especially those used in relatively clean and dry environments, plastic film can provide basic protection.

We use high-strength, compression- and tear-resistant cardboard boxes to ensure that they can withstand the weight of threaded knuckles and the impact of transportation.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Stainless Steel Pipe Nipple Exported Countries

We Export Stainless Steel Pipe Nipple to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

The post Stainless Steel Pipe Nipple appeared first on Supplier of Quality Forged Fittings-Flanges.

Stainless Steel Threaded Pipe Fittings

Z0065c — Thu, 17 Jul 2025 02:00:00 +0000

Stainless steel threaded pipe fittings are stainless steel pipe connectors that use threaded connection. They use the internal and/or external threads of the pipe fittings to screw together with pipes or equipment with corresponding threads to achieve functions such as pipe extension, diversion, branching, diameter reduction or closure. In pipeline engineering, it is widely used in various industrial and civil fields, such as petroleum, chemical industry, building water supply and drainage, etc.

Features of Stainless Steel Threaded Pipe Fittings

Strong corrosion resistance: Stainless steel material itself has excellent corrosion resistance, able to resist the erosion of a variety of chemical media, to ensure the long-term stable operation of the piping system.

Convenient installation: Threaded connection is a non-welded connection, which is very convenient and quick to install and disassemble, and does not require professional welding equipment and skills, greatly reducing the construction difficulty and cost.

Repeatable: Threaded connection allows repeated disassembly and installation of pipe fittings, which is convenient for maintenance, remodeling or relocation of piping systems.

Wide range of application: Widely used in a variety of piping material requirements and pressure level is not too high fluid transportation system.

Sealing: Reliable sealing can be realized through the screwing of threads and sealing materials.

ASME B16.11 Threaded Pipe Fittings Specification

Size: 1/4″ to 4″ ( DN6 to DN100)

Pressure Rating: Class 2000, 3000, 6000 LBS

Standard: ASME B16.11, BS3799, MSS SP-79 / 83 / 85 / 97

Type: Threaded Elbow, Tee, Cross, Cap, Coupling, Boss, Plug, Bushing and Union.

Material: ASTM A105, A350 LF2/LF3, A182 F5, F9, F11, F12, F22, F91, F304/304L, F316/316L, F317, F310S, F321, F347, F904.

Stainless Steel Threaded Pipe Fittings — Manufacturing Standards

Standard Code	Standard Name	Region / Organization
ASME B16.11	Forged Fittings, Socket-Welding and Threaded	USA (ASME)
ASTM A182	Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings	USA (ASTM)
EN 10241	Steel threaded pipe fittings	European (EN)
DIN 2999 / DIN EN 10226	Pipe threads where pressure-tight joints are made on the threads (BSPT)	Germany (DIN) / EU
BS 3799	Steel pipe fittings, screwed and socket-welding for the petroleum industry	UK (British Standard)
MSS SP-83	Class 3000 Steel Pipe Unions, Socket-Welding and Threaded	USA (MSS)

Thread Type

Tapered Pipe Thread.

NPT (National Pipe Taper): American National Tapered Pipe Threads are tapered on both the inner and outer threads, and rely on a tight fit on the threads themselves and a thread sealant to achieve a seal.

BSPT (British Standard Pipe Taper Thread) / R-Series: British Standard Pipe Taper Threads with a tapered male thread and either a tapered (Rc) or parallel (Rp) female thread, usually requiring a sealant to make a seal.

Parallel Pipe Thread.

BSPP (British Standard Pipe Parallel Thread) / G Series: British Standard Parallel Pipe Threads are straight parallel threads on both the internal and external sides. These threads do not provide a seal and rely on a washer, O-ring or other sealing device to seal either on the end of the thread or inside the thread.

Stainless Steel Threaded Pipe Fittings Dimensions

Elbow & Tee & Cross Dimension

Threaded 45 Elbow			Threaded 45 ° Elbow				Threaded Tee					Threaded Cross
Nominal Size		Center-to-End						Outside Diameter of Band			Wall Thickness			Length of Thread
DN	NPS	A						H			G min			L5 min	L2 min
		90° Elbows, Tees, Crosses			45 ° Elbows			H			G min
		2000	3000	6000	2000	3000	6000	2000	3000	6000	2000	3000	6000
6	1/8 1/4 3/8	21	21	25	17	17	19	22	22	25	3.18	3.18	6.35	6.4	6.7
8	1/4	21	25	28	17	19	22	22	25	33	3.18	3.30	6.60	8.1	10.2
10	3/8	25	28	33	19	22	25	25	33	38	3.18	3.51	6.98	9.1	10.4
15	1/2	28	33	38	22	25	28	33	38	46	3.18	4.09	8.15	10.9	13.6
20	3/4	33	38	44	25	28	33	38	46	56	3.18	4.32	8.53	12.7	13.9
25	1	38	44	51	28	33	35	46	56	62	3.68	4.98	9.93	14.7	17.3
32	1 1/4	44	51	60	33	35	43	56	62	75	3.89	5.28	10.59	17.0	18.0
40	1 1/2	51	60	64	35	43	44	62	75	84	4.01	5.56	11.07	17.8	18.4
50	2	60	64	53	43	44	52	75	84	102	4.27	7.14	12.09	19.0	19.2
65	2 1/2	76	83	95	52	52	64	92	102	121	5.61	7.65	15.29	23.6	28.9
80	3	86	95	106	64	64	79	109	121	146	5.99	8.84	16.64	25.9	30.5
100	4	106	114	114	79	79	79	146	152	152	6.55	11.18	18.67	27.7	33

Coupling & Boss & Cap Dimension

Coupling			Half-Coupling		Boss			Cap
Nominal Size		End-to-End	End-to-End		Outside Diameter		End Wall		Length of Thread
DN	NPS	W	P		D		G min		L5 min	L2 min
DN	NPS	3000 & 6000	3000	6000	3000	6000	3000	6000	L5 min	L2 min
6	1/8	32	19		16	22	4.8		6.4	6.7
8	1/4	35	25	27	19	25	4.8	6.4	8.1	10.2
10	3/8	38	25	27	22	32	4.8	6.4	9.1	10.4
15	1/2	48	32	33	28	38	6.4	7.9	10.9	13.6
20	3/4	51	37	38	35	44	6.4	7.9	12.7	13.9
25	1	60	41	43	44	57	9.7	11.2	14.7	17.3
32	1 1/4	67	44	46	57	64	9.7	11.2	17.0	18.0
40	1 1/2	79	44	48	64	76	11.2	12.7	17.8	18.4
50	2	86	48	51	76	92	12.7	15.7	19.0	19.2
65	2 1/2	92	60	64	92	108	15.7	19.0	23.6	28.9
80	3	108	65	68	108	127	19.0	22.4	25.9	30.5
100	4	121	68	75	140	159	22.4	28.4	27.7	33.0

Plug & Bushing Dimension

Square Head Plug		Hex Head Plug		Round Head Plug		Hex Head Bushing		Flush Bushing
Nominal Size		Length		Width Flats		Length		Hex Height
DN	NPS	Amin	B min	C min	E nom	D min	H min	G min	F nom
6	1/8	10	6	7	10	35	6		11
8	1/4	11	6	10	14	41	6	3	16
10	3/8	13	8	11	18	41	8	4	18
15	1/2	14	10	14	21	44	8	5	22
20	3/4	16	11	16	27	44	10	6	27
25	1	19	13	21	33	51	10	6	36
32	1 1/4	21	14	24	43	51	14	7	46
40	1 1/2	21	16	28	48	51	16	8	50
50	2	22	18	32	60	64	18	9	65
65	2 1/2	27	19	36	73	70	19	10	75
80	3	28	21	41	89	70	21	10	90
100	4	32	25	65	114	76	25	13	115

Types of Threaded Pipe Fittings

Threaded Elbow

A threaded elbow is a pipe fitting used to change the direction of a pipe, with threads on one or both ends. It usually consists of an elbow body and a threaded part. The bending part of the elbow body is generally 90° or 45°.

Threaded Tee

Threaded Tee is usually used in some low-pressure small-diameter pipeline systems. It can divide the pipeline into three branches and form a 90-degree angle between the three branches.

Threaded Cross

Threaded Cross is a pipe connector with four openings, usually used to divide the pipe system into four different directions to achieve the diversion of the medium.

Threaded Coupling

The threaded coupling is a simple but important pipe connection fitting. Its main structure is a hollow cylinder with threads inside. The threads at both ends of the couplings are usually of the same specification so that it can be connected to threaded pipes of the same diameter.

Threaded Cap

A threaded cap is a pipe fitting used to close the end of a pipe. It is mainly composed of a cap body and a threaded part. The cap body is a hemispherical or flat-top structure with a hollow interior to fit the outer diameter of the pipe. The threaded part is located at the open end of the cap body and is usually machined with internal or external threads, depending on the thread type of the pipe or pipe fitting it matches.

Threaded Nipple

A nipple, as the name implies, is a short tube with threads on both ends. Depending on the type of thread, it can be categorized into various forms, such as double male nipple with male threads on both ends, or male and female nipple with male threads on one end and female threads on the other.

Threaded Bushing

A bushing, also known as a buchen or reducer, is a type of tubing used for connecting different sizes of threaded fittings. It has a female thread on one end and a male thread on the other, and is used to convert between large and small diameters by matching the internal and external threads.

Threaded Plug

Plugs are threaded pipe fittings used to close off the end of a pipe or an unused connection. They come in two main forms, caps, which are usually used to close off the outside of a pipe, and plugs, which are usually used to close off the inside threads or ports of a pipe.

Applications

Water treatment systems: pure water, wastewater treatment, industrial circulating water, etc.

Food and beverage industry: piping with high requirements for hygiene and corrosion resistance.

Pharmaceutical industry: clean piping system.

Chemical and petrochemical industry: conveying corrosive media.

Instrumentation piping systems: connections in precision instrumentation and control systems.

Gas and liquefied gas piping: low pressure gas transportation.

General industrial fluids: compressed air, steam, oil, etc.

Stainless Steel Pipe Fittings Supplier/Manufacturer

ZIZI specialize in selling all kinds of stainless steel threaded pipe fittings, tubes, plates, flanges, bolts and nuts, our products are widely used in many fields, from precision machinery manufacturing to warm home decoration and even high-end aerospace industry. We have become a trusted choice for many industries due to our superior product quality and wide range of applications. Not only do we offer a wide range of products, but we can also provide customized processing services according to the specific needs of our customers, ensuring that your expectations are accurately met every time we work together. With advanced production equipment and strict quality management system, we are committed to providing high-quality piping solutions to customers worldwide. Welcome to contact us.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Stainless Steel Threaded Pipe Fitting Exported Countries

We Export stainless steel threaded pipe fitting to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

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Stainless Steel 304/304L Forged Fittings

Z0065c — Wed, 11 Jun 2025 02:02:54 +0000

Stainless Steel 304/304L Forged Fittings are critical components in various piping systems, known for their robustness, corrosion resistance, and ability to withstand high pressures and temperatures. They are manufactured using a forging process, which involves shaping heated steel by hammering or pressing, resulting in a dense and strong product with excellent mechanical properties.

Stainless steel forged fittings are pipe fittings forged from stainless steel round bars or billets, and have excellent corrosion resistance, high temperature resistance and high pressure resistance. According to different uses and connection methods, stainless steel forged pipe fittings can be divided into many types, such as elbows, tees, crosses, pipe clamps, pipe caps, etc. In today’s industrial field, stainless steel forged pipe fittings have become an important part of fluid transportation systems. As a high-quality, high-performance pipe fittings, stainless steel forged pipe fittings have been widely used in petroleum, chemical, natural gas, refrigeration and other industries.

Manufacturing Methods

Depending on the specific type and requirements of the pipe fitting, forged fittings are primarily manufactured using die forging, open-die forging (free forging), and machining processes. Conventional die forging methods often result in significant flash (excess material), leading to material waste. To reduce material consumption, some fitting manufacturers have started adopting flashless forming processes, achieving good results. This section mainly introduces the processes for manufacturing pipe fittings using die forging, open-die forging, and machining.

① Die Forging

For small-sized fittings with relatively complex shapes, such as socket-weld and threaded tees, crosses, and elbows, die forging should be used.

The raw material (billet) used for die forging should be rolled stock, such as bars, thick-walled pipes, or plates. When steel ingots are used as raw material, they should first be rolled into bars or pre-forged before being used as die forging billets to eliminate defects like segregation and looseness within the ingot.

After heating, the billet is placed into a die and forged (depending on the situation, it might undergo preliminary forging before final die forging). The pressure causes the metal to flow and fill the die cavity. If the forged blank has flash, an additional step of trimming off the excess material is required to complete the entire die forging process.

② Open-Die Forging (Free Forging)

For pipe fittings with special shapes or those unsuitable for die forging, open-die forging can be used. Open-die forging should produce the general shape of the fitting; for example, a tee should have its branch pipe section forged out.

③ Machining

For certain cylindrical-shaped fittings, such as double-socket couplings and unions, they can be directly machined from bar stock or thick-walled pipes. During machining, the metal material’s grain flow should be approximately parallel to the fitting’s axial direction. Tees, crosses, and elbow-type fittings must not be directly machined from bar stock.

Stainless Steel 304 / 304L Forged Fittings Specification

Specifications : ASTM A182 / ASME SA182

Standard : ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97, BS3799

Size : 1/8″ NB to 4″ NB

Type : Socket weld Fittings, Threaded Fittings

Rating Pressure : Threaded End – 2000 /3000/ 6000 LBS. Socket-weld End – 3000 / 6000/ 9000 LBS.

ASTM A182 F304/304L Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F304	MIN						8.0	18.0
MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F304L	MIN						8.00	18.00
MAX	0.03	2.00	0.045	0.030	1.00	13.00	20.00		0.10

ASTM A182 F304/304L Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F304	515 min	205 min	30 min	50 min
ASTM A182 F304L	485 min	170 min	30 min	50 min

Types of Stainless Steel 304/304L Forged Fittings

Forged fittings are primarily categorized by their connection method into two main types: Threaded Fittings and Socket Weld Fittings.

These two connection methods determine how the fittings are installed and connected within a piping system, which in turn dictates their respective application scenarios, pressure ratings, and specific advantages and disadvantages.

Socket Weld (SW) Fittings:

Characteristics: The fitting has an internal bore (socket) into which the pipe is inserted. The connection is then made by a fillet weld on the exterior of the fitting. This means the weld is outside the pipe, preventing it from affecting the pipe’s inner diameter.

Applications: Suitable for small-bore, high-pressure, high-temperature piping systems, especially those where a smooth internal wall is not strictly required, or where internal corrosion or scaling needs to be prevented (since the weld is external). Commonly used in the chemical, petroleum, and power industries.

Pressure Ratings: Typically available in Class 3000 LBS, 6000 LBS, 9000 LBS, etc.

Threaded (THD / Screwed) Fittings:

Characteristics: The fitting has internal or external threads (usually NPT or BSPT standards) that connect to the pipe via a threaded connection.

Applications: Suitable for small-bore, medium-to-low pressure, non-critical piping systems. They are easy to install and disassemble, requiring no welding. Commonly used in instrumentation lines, hydraulic systems, and pneumatic systems.

Pressure Ratings: Typically available in Class 2000 LBS, 3000 LBS, 6000 LBS, etc.

ASTM A182 F304 Forged Fittings Available Types & Shapes

Forged Stainless Steel 304L Pipe Fittings	ASME SA182M F304L Forged Fittings
Stainless Steel 304 Forged Pipe Fittings	Threaded Elbow
Socket Weld Cap	Threaded Tee
Socket Weld Elbow	Threaded Cross
Socket Weld Tee	Threaded Coupling
Socket Weld Cross	Threaded Cap
Socket Weld Coupling	Threaded Union
Socket Weld Union	Threaded Nipple
ASTM A182 F304L Reducing Tee	Threaded Hex Nipple
A182 SS 304 Hex Nipples	Threaded Swage Nipple
Stainless Steel UNS S30400 Socket Weld 90 Deg Elbow	Threaded Plug
ASTM A182 SS 304 Screwed Hex Plug	Threaded Bushing

Stainless Steel Threaded Fittings Dimensions

Stainless Steel Socket Weld Fittings Dimensions

Stainless Steel 304 vs. 304L Grades

Both 304 and 304L are austenitic stainless steels and are part of the “18/8” family (approximately 18% Chromium, 8% Nickel). They offer excellent corrosion resistance, good formability, and weldability. The primary difference lies in their carbon content:

Stainless Steel 304 (UNS S30400):

– Contains a maximum carbon content of 0.08%.

– Offers good general corrosion resistance and strength.

– However, during welding, the higher carbon content can lead to carbide precipitation in the heat-affected zone (HAZ), making it susceptible to intergranular corrosion in aggressive environments.

Stainless Steel 304L (UNS S30403):

– “L” stands for “Low Carbon,” with a maximum carbon content of 0.03%.

– This lower carbon content significantly reduces the risk of carbide precipitation during welding, making it highly resistant to intergranular corrosion in the “as-welded” condition.

– It’s the preferred choice for applications where welding is required and where the component will be exposed to corrosive environments without post-weld annealing.

– Due to the lower carbon, 304L has slightly lower mechanical properties (tensile and yield strength) compared to 304, but its improved weldability and corrosion resistance often outweigh this.

Applications of Stainless Steel 304/304L Forged Fittings

Chemical and Petrochemical Industries

Oil and Gas Industry

Food Processing and Pharmaceutical Industries

Power Generation

Water Treatment and Wastewater Facilities

Pulp and Paper Manufacturing

Marine Engineering

General Industrial Applications

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ASTM A182 Forged Fittings

Z0065c — Mon, 02 Dec 2024 05:06:30 +0000

ASTM A182 forged fittings refer to pipe fittings forged from alloy, stainless steel, or duplex steel materials. This standard covers multiple material grades for manufacturing alloy and stainless steel forged fittings to meet different usage environments and engineering requirements.

ASTM A182 forged fittings are a high-quality and high-performance pipeline connector widely used in industries such as petroleum, natural gas, chemical, and power that require high temperature and high pressure resistance in pipeline systems.

ASTM A182 Forged Fittings Specification

ASTM A182 specification covers forged low alloy and stainless steel piping components for use in pressure systems. Included are flanges, fittings, valves, and similar parts to specified dimensions or to dimensional standards.

Standard	ASME B16.11
Size Range	1/8″ to 4″
Pressure Rating	Class 2000LBS,3000LBS, 6000Lbs, 9000lbs.
Alloy Steel	ASTM A182 F11 / 12 / 22 / 5 / 9 / 91 / 92 / 22
Stainless Steel	ASTM A182 F304 / 304L / 304H, 316 / 316L, 321, 310S, 317, 347, 904L
Duplex Stainless Steel	ASTM A182 F51, F53, F44

ASTM A182 Forged Fittings Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F11 CL1	MIN	0.05	0.30			0.50		1.00	0.44
ASTM A182 F11 CL1	MAX	0.15	0.60	0.03	0.03	1.00		1.50	0.65
ASTM A182 F12 CL1	MIN	0.05	0.30					0.80	0.44
ASTM A182 F12 CL1	MAX	0.15	0.60	0.45	0.45	0.50		1.25	0.65
ASTM A182 F304	MIN						8	18
ASTM A182 F304	MAX	0.08	2	0.045	0.03	1	11	20		0.1
ASTM A182 F316	MIN						10	16	2
ASTM A182 F316	MAX	0.08	2	0.045	0.03	1	14	18	3	0.01
ASTM A182 F51	MIN						4.5	21	2.5	0.08
ASTM A182 F51	MAX	0.03	2	0.03	0.02	1	6.5	23	3.5	0.2
ASTM A182 F53	MIN						6	24	3	0.24
ASTM A182 F53	MAX	0.03	1.2	0.035	0.02	0.8	8	26	5	0.32
ASTM F55	MIN						6	24	3	0.2
ASTM F55	MAX	0.03	1	0.03	0.01	1	8	26	4	0.3

ASTM A182 Mechanical Property

MATERIAL	ASTM A182 F11 CL1	ASTM A182 F12 CL1	ASTM A182 F304	ASTM A182 F316	ASTM A182 F51	ASTM A182 F53	ASTM A182 F55
T.S (MPA)	415 min	415 min	515 min	515 min	620 min	800 min	750-895
Y.S (MPA)	205 min	220 min	205 min	205 min	450 min	550 min	550min
EL %	20 min	20 min	30 min	30 min	25 min	25 min	25min
R/A %	45 min	45 min	50 min	50 min	45 min	15 min	45min

Types of Forged Fittings

ASTM A182 forged fittings are mainly divided into two categories: socket weld and threaded fittings.

Socket Weld Fittings

Socket weld fittings are a type of pipe connection, consisting of a socket and a spigot. The socket is the part of the forged fittings that receives the spigot of another pipe fitting, and the spigot is the part of the pipe fitting that is inserted into the socket. Its outer diameter is slightly smaller than the inner diameter of the socket so that it can be inserted smoothly.

Elbow

Socket weld fittings include:

Threaded Fittings

Threaded fittings are fittings with threads, which are connected to other pipe fittings, valves or equipment through threaded connection. Threaded connection is a detachable connection method, which uses the internal or external threads on the forged fittings to achieve connection and sealing through the screwing of threads.

ASTM A182 Threaded fittings include:

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