API 5L PSL1 GRB spiral steel pipe wholesale factory Horizontal drilling protection pipe

When it comes to API 5L, everyone knows that there are two standards under it, PSL1 and PSL2. Although there is only a word difference, the content of these two standards is vastly different. This is similar to the GB/T9711.1.2.3 standard, which all mention the same component, but the requirements are thousands of miles apart. Below, I will elaborate on the differences between PSL1 and PSL2:

1. PSL is the abbreviation for product specification level. The product specification level of pipeline pipes 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, and these two specification levels are not only different in terms of inspection requirements, but also in terms of chemical composition and mechanical properties. Therefore, when ordering according to API 5L, the terms in the contract must indicate not only the usual indicators such as specifications and steel grades, but also 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. For all steel grades except x80, the average value of full size 0 ℃ Akv for PSL2 is ≥ 41J in the longitudinal direction and ≥ 27J in the transverse direction. X80 steel grade, full size 0 ℃ Akv average value: longitudinal ≥ 101J, transverse ≥ 68J.

3. Pipeline pipes should be subjected to water pressure testing one by one, and the standard does not specify that non-destructive water pressure testing is allowed, which is also a significant difference between API standards and Chinese standards. PSL1 does not require non-destructive testing, PSL2 should undergo non-destructive testing one by one.