ASTM A358 CL1 TP304 TP304H TP316L TP317L TP347 Stainless Steel Welded Pipe.Video
May 23, 2025
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ASTM A358 CL1 TP304 TP304H TP316L TP317L TP347 Stainless Steel Welded Pipe.Video
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.
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.
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 |
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