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
		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
		3000  &  6000	3000	6000	3000	6000	3000	6000
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