... Long- term cooperation 2.T/T &L/C 3.1/2''--48'' 4. high quality & competitive price F51 Steel Pipe MaterialCarbon Steel ... Seamless PipeStandardASTM, DIN, GB, BS, JIS, ASME, API, AISI,, ANSIGradeF51,F53,F55F304,304L,304H,309S,309H,310S,310H,316,316TI,316H ... , X70, X80, X100CertificationAPI, ISO, CE, UL, BSI, BVOuter Diameter1/2''-48''Wall Thickness2-59.54mmLengthSingle Random Length, Double Random Length ...