API 5L steel pipe generally refers to the implementation standard of pipeline steel pipe, which is used to transport oil, steam, water, etc. extracted from the ground to oil and gas industry enterprises. Pipeline steel pipes include seamless steel pipes and welded steel pipes.
There are many kinds of steel grades of raw materials for API 5L steel pipes: GR.B, X42, X46, X52, X56, X60, X70, X80, etc. The steel grades of steel pipes are different, and the requirements for raw materials and production are higher, and the carbon equivalent between different steel grades is strictly controlled.
The difference between API 5L PSL1 steel pipe and API 5L PSL2 steel pipe
1. PSL is the abbreviation of Product Specification Level. The product specification level of line pipe is divided into PSL1 and PSL2, and it can also be said that the quality level is divided into PSL1 and PSL2. PSL2 is higher than PSL1.
The two specification levels of PSL1 and PSL2 are not only different in inspection requirements, but also in chemical composition and mechanical properties. Therefore, when ordering according to API 5L, in addition to specifying the usual indicators such as specifications and steel grades, the terms in the contract must also indicate the product specification level, that is, PSL1 or PSL2.
PSL2 is stricter than PSL1 in terms of chemical composition, tensile properties, impact energy, non-destructive testing and other indicators.
2. PSL1 does not require impact performance.
PSL2 Average full-scale 0°C Akv for all steel grades except x80: longitudinal ≥ 41J, transverse ≥ 27J. X80 steel grade full-scale 0℃ Akv average: longitudinal ≥ 101J, transverse ≥ 68J.
3.The line pipe shall be subjected to hydraulic test one by one, and the standard does not stipulate that non-destructive substitution of water pressure is allowed. PSL1 does not require non-destructive testing, and PSL2 shall be non-destructive testing one by one.
