... 15mm2.Well-quality and competitive price3.API AND ISO Item:ASTM A106 Carbon Seamless TubeSize21.3-88.9*3-15mmLength4-12m ... random or being fixedApplicationUsage for liquid transportation ,structure, boiler.packagingin bundles, plastic caps, galvanizing, black ... coating ,or according to customer requirement.ASTMStandardASTM A 106-B,ASTM A 53-B,API 5LMaterialGR.A,GR.B,X42 X46 ...