ASTM A358 Stainless Steel EFW Pipe
Product Description
ASTM A358 is a standard specification covering austenitic electric fusion welded stainless steel grades. ASTM A358 pipes are designed with excellent chromium and nickel composition. ASTM A358 EFW pipes are divided into five categories: Class 1, Class 2, Class 3, Class 4, and Class 5. They perform well in high temperature applications and can be used in long-term service in the range of -196°C to 870°C, and short-term temperature resistance up to 1093°C (such as 316H).
ASTM A358 stainless steel welded pipes are available in various shapes and sizes, with outer diameters covering 1/2 inch (12.7mm) to 60 inches (1524mm), and wall thickness up to 25.4mm.
ASTM A358 / ASME SA358 EFW Pipes
Specification Of ASTM A358 EFW Pipes
|
Standard Specification |
ASTM A358, ASME SA358 |
|
Size |
½ to 6 inch Nominal Bore |
|
Types |
Welded, Seamless, ERW, EFW Supplier and Manufacturer |
|
Wall Thickness |
0.1-60 mm |
|
Length |
Single Random Length 5 to 7 Meter, Double Random Length 10-12 Meter |
|
Surface Finish |
Polished, Bright, Annealing, Cold Finish, Pickling |
|
Standard |
ASME, DIN, JIS, ASTM, GB, AISI, AMS, EN, GOST |
ASTM A358 Stainless Steel EFW Pipe Classification
|
Class |
Welding Process |
Inspection Requirements |
|
Class 1 |
Double-sided welding with full penetration |
100% radiographic testing (RT) + mechanical property testing |
|
Class 2 |
Double-sided welding without full penetration |
Visual inspection + hydrostatic testing |
|
Class 3 |
Single-sided welding with full penetration |
100% radiographic testing (RT) |
|
Class 4 |
Single-sided welding (no internal filler metal) |
RT testing + weld integrity verification |
|
Class 5 |
Double-sided welding with partial penetration |
20% sampling RT testing + ultrasonic testing (UT) |
Note:
Material selection: 316L for high chloride ion environment, 321H for high temperature creep resistance, and 904L for strong corrosion.
Class matching: Class 1 must be selected for high-risk scenarios (such as ASME BPVC pressure vessels), and Class 2 for general use.
Reasons Why GNEE Is A High-Quality Supplier
GNEE uses the electric fusion welding (EFW) process to achieve precise welding through high-speed beam energy, which meets the welding process requirements of Class 1-5 in the standard (such as full penetration, partial penetration, etc.). GNEE factories are required to perform 100% radiographic testing (Class 1/3) or sampling testing (Class 5) to ensure that the welds are free of defects such as pores and cracks, and meet pressure vessel standards such as ASME BPVC Section VIII.
ASTM A358 Welded Stainless Steel Pipes Manufacturer
ASTM A358 Welded Round Pipes Inspection
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