... submerged arc welding steel pipeStandardAPI 5L, GB/T9711,GradeQ235,Q345,B,X42,X52,X60,X65,X70applicationAs conveyer pipe in the fields ... , API SPEC 5LPackage detailsin bundles, case packing, or bulk pack Chemical Composition API 5LSteel GradeCMnPSMaxMaxMinMaxMaxAPI SPEC 5L ISO 3183GB/T 9711PSL1A25/L1750 ...