Stainless Steel Welded Pipe, 304 Welded Pipe, Stainless Steel ERW Pipe, ERW Stainless Steel Pipe, SS 304 ERW Pipe, EFW Stainless Steel Pipe, Welded Stainless Steel Pipe 316L, Stainless Steel Welded Pipe Manufacturers, SS ERW Pipe Manufacturer, Welding SCH 10 Stainless Pipe

 

 

A stainless steel welded pipe is a steel pipe made of a plate or steel strip after crimping and welding. SS welded pipe has a simple production process, high production efficiency, many varieties and specifications, and less equipment investment. The advantage is low cost, but its general strength is lower than that of seamless steel pipe. Common stainless pipe welding includes electric resistance welding (ERW), electric-fusion welding (EFW), submerged arc welding (SAW), longitudinal submerged arc welding Longitude (SAWL), and transverse submerged arc welding SAWH.

 

 

Stainless Steel Welded Pipe Specifications

Pipe Specifications	ASTM A312 / ASME SA 312 ASTM A269 / ASME SA 213 ASTM B676 / ASME SB676
Grade	TP304,TP304L,TP316,TP316L,316Ti TP317,TP317L,TP321,TP310S,TP347,S31254,N08367,N08926,N08904
Pipe Standard	DIN, JIS, ASTM, EN, GB, AISI, ASME
Pipe Thickness	0.3mm - 50 mm
Welded Pipe size	5.0 mm - 1219.2 mm
Pipe Schedule	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Pipe & Tube End	Plain End, Beveled End, Treaded Pipe.

 

We are stainless steel welded pipe in compliance with ASTM A312, ASME SA312, ASTM A269, ASME SA269, ASTM B676, and ASME SB676 standards. Including various grades TP304, TP304L, TP310S, TP316, TP316L, 316Ti, TP317, TP317L, TP321, TP347, TP347H, N08367, N08926, N08904, S31254. Our stainless steel welded pipes comply with national and international material standards, and the quality and performance are guaranteed. 

 

Application SS Welded Pipe

SS welded pipe is usually a large diameter pipe, and the production size standard of Pipe complies with ASME B36.19. Stainless steel ERW pipes are generally large-diameter pipes and are widely used. They are mainly used for low-pressure fluid pipes and a large number of pipes for transporting fluids, such as water, gas, natural gas, oil, boilers, mechanical parts, and sewage pipes. 

 

Chemical Composition of Stainless Steel Welded Pipe

Grade	UNS	C≤	Mn	P≤	S≤	Si≤	Cr	Mo	Ni	Cu
TP304	S30400	0.08	2	0.045	0.03	1	18.0-20.0	-	8.0-11.0	-
TP304L	S30403	0.035	2	0.045	0.03	1	18.0-20.0	-	8.0-13.0	-
TP316	S31600	0.08	2	0.045	0.03	1	16.0-18.0	2.00-3.00	10.0-14.0	-
TP316L	S31603	0.035	2	0.045	0.03	1	16.0-18.0	2.00-3.00	11.0-14.0	-
316Ti	S31635	0.08	2	0.045	0.03	0.75	16.0-18.0	2.00-3.00	10.0-12.0	-
TP317	S31700	0.08	2	0.045	0.03	1	18.0-20.0	3.0-4.0	11.0-14.0	-
TP317L	S31703	0.035	2	0.045	0.03	1	18.0-20.0	3.0-4.0	11.0-15.0	-
TP321	S32100	0.08	2	0.045	0.03	1	17.0-19.0	-	9.0-12.0	-
321H	S32109	0.04-0.1	2	0.045	0.03	1	17.0-19.0	-	9.0-12.0	-
310	S31000	0.25	2	0.045	0.03	1.5	24.0-26.0	0.75	19.0-22.0	-
TP310S	S31008	0.08	2	0.045	0.03	1	24.0-26.0	0.75	19.0-22.0	-
TP347	S34700	0.08	2	0.045	0.03	1	17.0-19.0	-	9.0-13.0	-
254SMO	S31254	0.02	1	0.03	0.01	0.8	19.5-20.5	6.0-6.5	17.5-18.5	0.5-1.0
AL-6XN	N08367	0.03	2	0.04	0.03	1	20.0-22.0	6.0-7.0	23.5-25.5	0.75
F904L	N08904	0.02	2	0.04	0.03	1	19.0-23.0	4.0-5.0	23.0-28.0	1.0-2.0

 

Stainless Steel Welded Pipe Mechanical Properties

Mechanical properties	Tensile, min, ksi[MPa】	Yield, min, ksi[MPa】	Elongation, %(min)	Hardness, HB（max）
TP304	75【515】	30【205】	35	192
TP304L	70【485】	25【170】	35	192
TP316	75【515】	30【205】	35	192
TP316L	70【485】	25【170】	35	192
316Ti	75【515】	30【205】	35	192
TP317	75【515】	30【205】	35	192
TP317L	75【515】	30【205】	35	192
TP321	75【515】	30【205】	35	192
321H	75【515】	30【205】	35	192
TP310	75【515】	30【205】	35	192
TP310S	75【515】	30【205】	35	192
TP347	75【515】	30【205】	35	192
S31254	98【675】	43【310】	35	220
N08367	100【690】	45【310】	30	241
N08926	94【650】	43【295】	35	256
N08904	71【490】	31【215】	35	192

 

Stainless Steel Welded Pipe Production Process

The typical production process of SS welded pipe: Raw material decoiling—flattening—end shearing and welding—loop—forming—welding—removal of inner and outer welding beads—pre-calibration—heat treatment—sizing and alignment—eddy current testing—cutting—hydraulic pressure inspection—pickling—final inspection—packing—shipment.

 

The raw materials of spiral steel pipe are steel coil, welding wire, and flux. Before forming, the strip steel is leveled, trimmed, planed, surface cleaned, transported, and pre-bent. The weld gap control device is used to ensure that the weld gap meets the welding requirements and that the pipe diameter, misalignment, and weld gap are strictly controlled. After cutting into single steel pipes, the first three steel pipes of each batch must undergo a strict first inspection system to check the mechanical properties, chemical composition, and fusion status of the welds. After the surface quality of the steel pipe and the non-destructive flaw detection are checked to ensure that the pipe-making process is qualified, it will be officially put into production.

 

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