... after-sales serviceAPI 5L screw steel pipeGrades:1>J55,K55,N80,P110,L802>ASTM A106 GR ... .A ,A106 Gr.B,A53 Gr.A,A53 Gr.B,ASTM A179-C, ... A214-C,A192,A226,A315-B,A178-C,A210-A-13>STFA410,STB340,STB410,STPG370STPG38,STPG410STPG42,STPT370,STPT410,STS38 ... steel grade is available as per clients requirements.Ordinary Sizes:1) Outsider diameter: 60 - 273mm2) Wall Thickness: 4- 30mm3 ...