| ASTM A 213 / SA 213 | Seamless Alloy Steel Tubes for Boiler, Superheater & Heat - Exchanger. |
| ASTM A 333 / SA 333 | Seamless Carbon and Alloy Steel Pipes for Low-Temperature Service. |
| ASTM A 334 / SA 334 | Seamless Carbon and Alloy Steel Tubes for Low-Temperature Service. |
| ASTM A 335 / SA 335 | Seamless Ferritic Alloy Steel Pipe for High-Temperature Service. |
| BS 3059 PART - II | Seamless Carbon / Alloy Steel Tubes for Boiler and Superheater. |
| DIN EN 10216 - 2 | Seamless Non - Alloy & Alloy Steel Tubes for Pressure Purposes. |
| DIN EN 10297 - 1 | Seamless Non - Alloy & Alloy Steel Tubes for Mechanical & General Engineering Purposes. |
