... by BaoSteel 3, more than 25 years Good quality cold drawn boiler seamless steel tube or pipe 1) Cold Drawn Boiler Seamless Steel ... tube or pipe ASTM A179/A192, ASTM A213 T11/T22/T12/T5 ASTM A209 T1 2) Certificate:ISO9001-2000,PED, API, TS16949 ... .6), ASTM-A334(Gr.6), ASTM-A335(P11/P22), API 5L , API 5CT, JIS G3454(STP G370 STP G410), JIS G 3461 ...