Pipeline steel API 5L X42 PSL1 is also called L290 steel. The name has much to do with API 5L X42 PSL1 strength, that is, the minimum yield strength is 42100 Psi or 290 Mpa. Pipeline steel API 5L X42 PSL1 is higher level steel than API 5L grade B. Pipeline steel API 5L X42 PSL1 is required in large quantities in most of pipelines for oil and gas transmissions.
Pipeline steel API 5L X42 PSL1 strength:
| Grade | Yield Strength | Tensile Strength |
| Mpa (Psi) | Mpa (Psi) | |
| API 5L X42 PSL1 | 290 (42100) | 415 (60200) |
For pipeline steel API 5L X42 PSL1, PSL is short for product specification level. Pipeline steel product specification level is divided into PSL1 and PSL2. Pipeline steel API 5L X42 PSL1 differs with X42 PSL2 steel in inspection requirements, chemical composition, mechanical performance requirements, etc.
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