... line pipes aremanufactured in accordance with API Spec 5L, ASTM A106/A53. Product nameStandardSteel GradeLengthSurface TreatmentFluid PipeGB/T816320#,Q295,Q3456 mtr ... -2L245,L290,L320,L360,L390,L415APL Spec 5LPSL 1:A,B,X42,X46,X52ASTM A53ASTM A106B Linzhou Fengbao,a professional seamless ...