... to ANSI B16.5,BS4504,BS10,DIN,UNI and JIS standard,made of the raw materials of ASTM A105,A182,ST37.2,C22. ... 8,ASTM A694,JIS G3101 SS41,etc.size ... ,DIN2605,JIS B2311,ISO AND BS standard. Raw materials: ASTM A234 WPB,ST37.0,ST35.8,SUS403,WPHY46/52 ... ,ASTM A403 304/304L 316/316LSIZE: seamless 1/2"--48" ...