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ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
Specifications
Brand Name :
YUHONG
Model Number :
ASTM A358 Class 1 TP316L Stainless Steel Welded Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1000kgs
Payment Terms :
L/C,T/T
Packaging Details :
Ply-wooden Case / Bundle with plastic Cap
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,
High Light :
ASTM A358 CL.1 TP316L Stainless Steel Welded Pipe, ASTM A358 EFW Pipe
Description

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
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
Nominal Dia Over Under % Over %Under Over Under
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.

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

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

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Product Detail
Brand Name :
YUHONG
Model Number :
ASTM A358 Class 1 TP316L Stainless Steel Welded Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1000kgs
Payment Terms :
L/C,T/T
Contact Supplier
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe
ASTM A358 / ASME SA358 TP316/316L Class1 EFW Stainless Steel Double Welded Pipe

Yuhong Group Co.,Ltd

Verified Supplier
14 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
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