... or black Standard Steel Pipe ASTM A106/A53 Gr.B API5L Gr.B /J55,K55OD: 21.3mm-810mmWT: 2mm-120mmCertification:ISO & APITechnique ... ,STD,XS,SCH80,SCH160,XXS etc.Length5.8--12MSteel materialQ195 Grade B, SS330,SPHC, S185Q235 GradeD,SS400,S235JR,S235JO,S235J2, ST33,A53 ...