Petroleum cracking tube pipe 20# petroleum casing tube seamless tube Typesteel pipePetroleum cracking tube pipe 20#petroleum casing tubeseamless tubeSize1/2"-24"Wall thicknessSch5-Sch160XXSStandardANSI,ASME GB, SH,HG, MSS,JIS,DIN, APIMaterialASTM A106 GRB/ A53 GRB/ API 5L GRB/ Q345/A335/ST37/ST52 Packagingpainting black, cap, In bundle.Applications range petroleum, smelting, foodstuff, power, ...