Material: A106 GR B, A53 GR B,API 5L GR B, ... Black Steel Pipe & ISO900, API2)Standard executived:ASTM:ASTM A335,ASTM A213,ASTM A269,ASTM A312,ASTM A333,ASTM A106,ASTM ... 5CT,API SPEC 5L,SY/T5037-20003)Material:ASTM:A106 GR B/,A53 GR B,A36 GR B,API ... { 'aImgSrc': aBigImageSrc } ); } )(); A106,A53,JIS G3452,G3454,;DIN1629,DIN17175,DIN2448 Seamless,welded ST37.2/ST52.4/ST35.8 carbon black Steel Pipe