| SPEC | GRADE | REMARKS |
|---|---|---|
| API 5L | B ~ X80 | Line Pipe |
| API 2B | 2H, 2W | Fabrication of Structure Steel Pipe |
| ASTM A134 | Pipe, Steel, Electric-Fusion(Arc)-Welded (Size NPS 16 and over) | |
| ASTM A139 | A, B | Electric-Fusion(Arc)-Welded Steel Pipe (Size NPS 4 and over) |
| ASTM A252 | 1, 2, 3 | Welded and Seamless Steel Pipe Piles |
| ASTM A671 | All | Electric-Fusion-Welded Steel Pipe for Atmospheric & Low Temperature |
| ASTM A672 | All | Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperature |
| ASTM A691 | Carbon and Alloy Steel Pipe, Electric-Fusion Welded for High Pressure Service at High Temperatures | |
| JIS G 3444 | STK 90,400,490,500,540 | Carbon Steel Tubes for General Structural Purpose |
| JIS G 3457 | STPY 400 | Arc Welded Carbon Steel Pipe |
| KS D 3583 | SPW 400 | Arc Welded Carbon Steel Pipe |
| KS D 3566 | STK 90,400,490,500,540 | Carbon Steel Tubes for General Structural Purpose |
| SPEC | GRADE | REMARKS |
|---|---|---|
| ASME | Sec VIII DIV1 UCS-56 | Post Weld Heat Treatment for Pressure Vessels Constructed Carbon of Low Alloy Steels |
| Sec VIII DIV1 UNF-56 | Post Weld Heat Treatment of Nonferrous Materials | |
| Sec VIII DIV1 UHA-32 | Post Weld Heat Treatment for Pressure Vessels Constructed of High Alloy Steels |
|
| ASTM | A671 Table 2 | Heat Treatment of EFW Steel Pipe for Atmospheric and Low Temperatures |
| A672 Table 2 | Heat Treatment of EFW Steel Pipe for High-pressure Service at Moderate Temperatures |
|
| A691 Table 2 | Heat Treatment of Carbon & Alloy Steel Pipe, EFW for High-Pressure Service at High Temperatures |
|
| Others | Normalized or Normalized and Tempered of Steel Structure |