Name: ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A358 Class 1 TP316L Stainless Steel Welded Pipe
Price: 500,000.00 USD
Availability: InStock

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ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	ASTM A358 Class 1 TP316L Stainless Steel Welded Pipe

Payment & Shipping Terms:

Minimum Order Quantity:	1000kgs
Packaging Details:	Ply-wooden Case / Bundle with plastic Cap
Payment Terms:	L/C,T/T

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Detailed Product Description

Product Name:	Stainless Steel Welded Pipe	Standard:	ASTM A358/ ASME SA358
Material Grade:	TP316/316L	OD:	1/4" To 32" Or Custom
Thickness:	SCH.5S- SCH.XXS	Length:	Single Random, Double Random & Cut Length
Class:	Class 1, 2, 3, 4, 5	End:	Plain End, Beveled End
Application:	Chemical Processing, Petrochemical, Oil And Gas, Food Processing,
Highlight:	ASTM A358 stainless steel welded pipe , ASME SA358 TP316L double welded pipe , EFW stainless steel pipe with warranty

ASTM A358 / ASME SA358 CL.1 TP316/316L Stainless Steel EFW Pipe Double Welded Pipe

ASTM A358 TP316/316L Class 1 Stainless Steel EFW Double Welded Pipe is a large-diameter, longitudinal welded stainless steel pipe. It is made from a dual-certified low-carbon stainless steel plate, welded from both sides for full penetration, and then fully heat-treated to maximize corrosion resistance. It is a high-integrity product designed for severe service conditions.

The entire pipe is heated to a temperature range (typically 1900°F to 2050°F for 316L) and then rapidly cooled (quenched) to put the chromium carbides back into solution. This ensures the weld seam and the Heat Affected Zone (HAZ) have the same corrosion-resistant properties as the base metal. Class 1 pipes are also 100% radiographically inspected.

Comparison Between ASTM A312 Welded Pipe and ASTM A358 Welded Pipe

Feature	ASTM A312 Welded Pipe	ASTM A358 Class 1 EFW
Typical Welding Method	Single-Welded (from Outside)	Double-Welded (Outside + Inside)
Weld Access	Outside only (automatic fusion)	Inside and Outside (with back-gouging)
Heat Treatment	Solution Annealed (Required)	Solution Annealed (Required for Class 1)
Typical Use Case	General corrosion service, smaller diameters, lighter walls.	Critical service, large diameters, thick walls, high pressure.
Double Weld Allowed?	No	Yes (Mandatory for Double Welded spec)

Chemical Composition % TP316/316L Class1 EFW Stainless Steel Pipe

Material	% Max ASTM A358 Chemical Composition
Material	C	Mn	P	S	Si	Cr	Ni	Mo	N B	Nb	Ti
A358 TP304	0.08	2.00	0.045	0.030	1.00	18.0-20.0	8.0-11.0	…	…	…	…
A358 TP304L	0.035 D	2.00	0.045	0.030	1.00	18.0-20.0	8.0-13.0	…	…	…	…
A358 TP316	0.08	2.00	0.045	0.030	1.00	16.0-18.0	11.0-14.0	2.00-3.00	…	…	…
A358 TP316L	0.035	2.00	0.045	0.030	1.00	16.0-18.0	10.0-14.0	2.00-3.00	…	…	…
A358 TP316Ti	0.08	2.00	0.045	0.030	0.75	16.0-18.0	10.0-14.0	2.00-3.00	0.10	…	5x(C+N)-0.70

ASTM A358 Welded Pipe Thickness Tolerance

Specification	Allowable OD in mm			Allowable Wall Thickness Variation		Exact Length Tolerance in mm		Testing Requirement
Specification	Nominal Dia	Over	Under	% Over	%Under	Over	Under	Testing Requirement
ASTM-A312 Seemless & Welded pipe	3.175-38.1 incl	.4	.79	Minimum Wall 12.5% under nominal wall Specified		6.4 0	0	Tension Test
	38.1-1016 incl	.79	.79			6.4 0	0	Flattening Test
	101.6-203.2 imcl	1.59	.79			6.4 0	0	100% Hydrostatic Test
						(Normally Random Lengths ordered		Refer to ASTM A-530
ASTM A358 EFW/ Welded pipe	219.08-750mm or 0.01 inch	+0.5%		-0.3		6.0		Refer to ASTM A-530

The Process: EFW (Electric Fusion Welding)

EFW is a welding process where the pipe is formed from a flat plate (skelp) and then welded longitudinally.
How it works: The plate edges are prepared, brought together, and fused using an electric arc. Filler metal is typically added.
Comparison to ERW: While often used interchangeably, EFW typically refers to welding with filler metal (consumables), whereas ERW (Electric Resistance Welding) usually does not use filler metal and relies on pressure and resistance heat. EFW is preferred for thicker walls and critical services.

Applications

Because of the robust welding method and high corrosion resistance, this pipe is used in demanding environments:

Chemical Processing: Handling acids, sulfates, and chlorides.
Petrochemical Refineries: High-temperature hydrocarbon service.
Pharmaceutical & Food Processing: Where cleanliness and corrosion resistance are vital.
Water Treatment: Desalination plants and wastewater treatment (resists chloride corrosion).
Power Generation: Flue gas desulfurization (FGD) systems.