What is the Difference Between PSL1 And PSL2 Pipes?
API 5L line pipe is available in two types: PSL 1 and PSL 2. But what is a PSL? PSL stands for Product Specification Level. PSL stands for Product Specification Level.
Pipes are used in different types of environments such as corrosive and non-corrosive. Pipes used in severely corrosive environments require materials that can withstand such process conditions. On the other hand, standard quality level pipes used for normal service will also serve the purpose.
Chemical Properties
| PARAMETER |
PSL1 |
PSL2 |
| Chemistry: Max C for Seamless pipe |
0.28% for grades ≥ B |
0.0024 |
| Chemistry: Max C for Welded pipe |
0.26% for grades ≥ B |
0.0022 |
| Chemistry: Max P |
0.03% for grades ≥ A |
0.0003 |
| Chemistry: Max S |
0.0003 |
0.0002 |
| Carbon equivalent: |
Only when purchaser specifies SR18 |
Maximum required for each grade |
Mechanical Properties
| PARAMETER |
PSL1 |
PSL2 |
| Yield strength, maximum |
None |
Maximum for each grade |
| UTS (Ultimate Tensile Strength) maximum |
None |
Maximum for each grade |
| Fracture toughness |
None required |
Required for all grades |
For PSL2 pipes, there are limits on the maximum yield strength and ultimate tensile strength, while for PSL1 pipes, meeting the minimum requirements is sufficient. The second mandatory requirement for PSL2 pipes is fracture toughness, which is not required for PSL1 pipes.
