Yuhong Group Co.,Ltd
| 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 |
| 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 |
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Product Specification
| 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 |
| 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 |
| High Light | 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.
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 |
|
||||||||||
| 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.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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