API 5L X52 Pipe PSL1 or PSL2
API 5L pipes are available in different grades. The grade X52 refers to the yield strength of the pipe, which is 52.000 psi. The X52 grade is available in 2 levels of specification: PSL1 and PSL2. PSL1 is the most common and standard specification level. In some industries and applications for Windenergy, Offshore -, Oil and Gas -, and Shipbuilding Industry a higher specification standard is required; Product Specification Level PSL 2.