Certificate: ISO9001 Standard: ASME, ANIS, DIN, JIS, EN Material: A105/A234 and stainless Size:l: from 1/2'' to 24'' specification: ... , ASTM , ANSI , EN 10253-1 , DIN , JIS , GOSTMaterial:Carbon Steel:WPB A234 and stainless steel(10# 20# Q235,20G,16Mn,ASTM A105 ...