These pipes are part of the API 5L specification developed by the American Petroleum Institute to standardize the quality of seamless and welded steel pipes. API 5L X42 refers to the grade with a minimum yield strength of 42,000 psi. Known for its strength, weldability, and corrosion resistance, these pipes are available in both PSL1 and PSL2 product specification levels, making them ... https://www.carbonsteelspipe.com/api-5l-x42-pipes-manufacturers-exporters-suppliers-stockists.html