API 5L is the standard specification for seamless and welded steel pipe used in pipeline transportation systems for the oil and gas industry. It includes manufacturing requirements for two product specification levels (PSL1 and PSL2) API 5L does not apply to cast pipe. API Line Pipe Specification API 5L Pipe (Seamless Steel Pipe) Type Seamless steel pipe Material GR.B, X42, X52, X60,etc. Application Line pipe Special pipe Regular and special thick-walled steel pipe, maximum thickness of up to 60MM Process Hot rolled and hot expanded Specification in Milimeter 114-914MM*4-60MM Diameter in Milimeter 114MM-914MM Thickness in Milimeter 4MM-60MM…