... -1999, GB/T5310-1995 ASTM A53/A106/A192/A179DIN1626/DIN17175/DIN1629BRAND NAME: GYMATERIAL: 10#/20#, GR.B/GR, A-1, ST45/ST45.8/ST35 ... ends in hexagon or triangle bundle with steel stripsseamless pipeStandards: ASTM A106/A53, API SPEC 5L Gr. B, X42-52Surface: Black coating, Plain ends ... bundles ,nude or PVC gunny,container or bulk cargo A53 GR.B carbon steel seamless pipes