... PLATE HOT PLATE STEEL COIL STEEL PIPES CERTIFICATE ISO9001:2008 STANDARD AISI, ASTM, DIN, GB, JIS AISI, ASTM, DIN, GB, JIS AISI, ASTM, DIN, GB ... steel pipe,Seamless steel pipe(TPCO, Baogang Steel), Alloy steel pipe, API oil casting pipe(TPCO), Mild & Alloy steel plate(Q195-Q345), Stainless steel bar, Round bar(SHOUGANG,DAYE), Spiral pipe(LIDA), Galvanized pipe ...