... 2.material:Astm a 53/106/ API 5LA/B,ST37,ST35.8;Standard:ASTM,DIN,JIS 3.ISO and ... development of product technolog orientation. Seamless Pipe Typeapi 5l gr b pipeSize1/2"-36"Wall thicknessSch5-Sch160XXSStandardASME B36.10M-1996 ,API ... ,ANSI ,GB, SH,HG, MSS,JIS,DINMaterialASTM A106 GRB/ A53 GRB/ API 5L ...