API 5L Gr.B pipes are stemmed from API Spec 5L spec for line pipe, and they appropriate for the transportation of gas, oil and water.API 5L are separated right into 2 item degrees: API 5L PSL1 and also API 5L PSL2.PSL1 is a common top quality for line pipe where PSL2 has extra chemical, mechanical residential or commercial properties, as well as testing requirements.Grades covered by API 5L requir