More about API 5L standard

Coverage This specification specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipe for use in pipeline
transportation systems in the petroleum and natural gas industries. This specification is not applicable to cast pipe

The API standard will be devided into many devisions but we intent to mention a fewof most applicable standards here such as:
for welded pipe with welded seam from 42X up to 70X the API 5lX will be suitable
for welded pipe in spiral pipes API 5LS is more applicable
for welded pipe with U material we always reffer to API 5LU
also for Epoxy Resin Coated PIpes we use API RP 5L2

To access the whole standard terms and descriptions for API 5L please click here