seamless pipe Certificate:API & ISO Size:168-914Thickness:5-60mm Standard:ASTM,GB,EN,DIN, seamless steel pipe Details:seamless pipeCertificate:API & ISO Size:168-914Thickness:5-60mm Standard:ASTM,GB,EN,DIN, Commodity Seamless pipeOut diameter(mm) 168mm-914mm Wall thickness(mm)6mm-50mm Standard API /GB/ BS/DIN/JIN/EN/ ECT.Quality grade No.1Material Carbon GradeAPI 5L A106 GR.B ST37 ST44 ST 52/ X42 ...