api188API 5L X52 pipe also called L360 Pipe, named by minimum yield strength 52 Ksi (360 Mpa) in API 5L or ISO 3183 specifications, types in seamless, ERW, LSAW, SSAWHSAW.API Recommended Practice 571, Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, has been published to provide guidance to pressure equipment integrity personnel.