Complaint
Seamless Steel Pipe, ERW High-Frequency Welded Pipes, and SSAW/LSAW Welded Pipes
The steel for welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. Structural Hollow Sections shall be manufactured by electric welding or submerged arc welding without subsequent heat treatment.
| Steel Grade | C Max % | Si Max % | Mn Max % | P Max % | S Max % | N Max % |
|---|---|---|---|---|---|---|
| S235JRH | 0.17 | - | 1.4 | 0.04 | 0.04 | 0.009 |
| S275J0H | 0.2 | - | 1.5 | 0.035 | 0.035 | 0.009 |
| S275J2H | 0.2 | - | 1.5 | 0.03 | 0.03 | - |
| S355J0H | 0.22 | 0.55 | 1.6 | 0.035 | 0.035 | 0.009 |
| S355J2H | 0.22 | 0.55 | 1.6 | 0.03 | 0.03 | - |
| S355K2H | 0.22 | 0.55 | 1.6 | 0.03 | 0.03 | - |
| Steel Grade | Min Yield Strength Mpa T≤16 | Min Yield Strength Mpa 16 < T≤40 | Tensile Strength Mpa T≤3 | Tensile Strength Mpa 3 < T≤40 | Min Elongation T < 40 | Min Impact Ennergy -20ºC J | Min Impact Ennergy 0ºC J | Min Impact Ennergy 20ºC J |
|---|---|---|---|---|---|---|---|---|
| S235JRH | 235 | 225 | 350-510 | 360-510 | 24 | - | - | 27 |
| S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
| S275J2H | 275 | 265 | 430-580 | 410-560 | 20 | 27 | - | - |
| S355J0H | 355 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
| S355J2H | 355 | 345 | 510-680 | 470-630 | 20 | 27 | - | - |
| S355K2H | 355 | 345 | 510-680 | 470-630 | 20 | 40 | - | - |
Wall Thickness:Plus or minus 12.5%
Weights:Plus or minus 10%
Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and electric-resistance-weld pipe.
Cast Analysis-One result per delivery item
Tensile Test-One result per delivery item
Impact Test-Per Heat Number
Surface Condition and Dimensions- 10%
NDT of the Weld-All products, full length
