Summary of Differences Between PSL 1 and PSL 2
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|
| Parameter |
PSL1 |
PSL2 |
|
| |
|
|
| Grade range |
A25 through X70 |
B through X80 |
| Size range |
0.405 through 80 |
4.5 through 80 |
| Type of pipe ends |
Plain-end, threaded end |
Plain-end |
| Seam welding |
All methods: continuous welding limited to Grade A25 |
All methods except continuous and laser welding |
| Electric welds: welder frequency |
No minimum |
100kHz minimum |
| Heat treatment of electric welds |
Required for grades > X42 |
Required for all grades (B through X80) |
| Chemistry: max C for seamless pipe |
0.28% for grades >= B |
0.24% |
| Chemistry: max C for welded pipe |
0.26% for grades >= B |
0.22% |
| Chemistry: max P |
0.030% for grades >= A |
0.025% |
| Chemistry: max S |
0.030% |
0.015% |
| Carbon equivalent |
Only when purchaser specifies SR18 |
Maximum required for each grade |
| Yield Strength, maximum |
None |
Maximum required for each grade |
| UTS, maximum |
None |
Maximum required for each grade |
| Fracture toughness |
None required |
Required for all grades |
| Nondestructive inspection of seamless |
Only when purchaser specifies SR4 |
SR4 mandatory |
| Repair by welding of pipe body, plate by skelp |
Permitted |
Prohibited |
| Repair by welding of weld seams without filler metal |
Permitted by agreement |
Prohibited |
| Certification |
Certificates when specified per SR15 |
Certificates (SR 15.1) mandatory |
| Traceability |
Traceable only until all tests are passed, unless SR15 is specified |
Traceable after completion of tests (SR 15.2) mandatory |