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
	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
						ave	min	ave	min	ave	min					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
						ave	min	ave	min	ave	min
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
		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
		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

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