Product specification level(PSL),there are PSL1, PSL2. PSL2 NACE for sour service. PSL2 LSAW steel pipe require more inspection in API SPEC 5L standard new edition, Impact test is mandatory. The chemical analysis,mechanical properties,technical properties,welding test, repair welding is also different between PSL1 and PSL2.
There are special requirements from the purchasing of material and production and inspection for PSL2 LSAW pipesa)For PSL 2 pipe, the steel shall be killed and made according to fine grain practice.
b)The strip or plate used for the manufacture of PSL 2 pipe shall not contain any repair welds.
c)For PSL 2 pipe, during the processing,the manufacturer shall establish and follow documented procedures for maintaining the heat identity and the test-unit identity for all such pipe. Such procedures shall provide means for tracing any length of pipe to the proper test unit and the related chemical and mechanical test results.
d)The chemical composition for API 5L PSL2 LSAW Pipe