... 4-1/2”,5”,5-1/2”,6-5/8”,7”,7-5/8”8-5/8”,9-5/8”,10-3 ... 16”,18-5/8”,20” Tubing:2-3/8”,2-7/8”,3-1/2”,4”,4-1/2”GradeH40,J55 ... and other fluids. Our line pipes aremanufactured in accordance with API Spec 5L, ASTM A106/A53. Product nameStandardSteel GradeLengthSurface TreatmentFluid PipeGB/T816320 ... 1GB/T9711.2ISO3183-1ISO3183-2L245,L290,L320,L360,L390,L415APL Spec 5LPSL 1:A,B,X42,X46,X52ASTM A53ASTM A106B ...