... pipe 2.Variety sizes ASTM A179, A192, DIN17175, BS3059, A334 Gr.6 Seamless steel pipe:ASTM A179, A192, DIN17175, BS3059, ... A334 Gr.6 Certificate:ISO9001-2000,PED, API, TS16949; Mill Test ... 5CT, TS16949,Mill Test Certificate EN10204/3.1B3) O.D: 1/2"-4"(19.05mm-114.3mm, NB10-NB100)4 ... Seamless steel pipe:ASTM A179, A192, DIN17175, BS3059, A334 Gr.6