... Boiler Seamless Steel tube or pipe ASTM A179/A192, ASTM A213 T11/T22/T12/T5 ASTM A209 T1 2) Certificate:ISO9001-2000 ... DNV3) Standard:ASTM A106, ASTM A53, ASTM-A179, ASTM-A192, ASTM-A210 A1/C, ASTM-A213(T11/T12/T22/T5), ASTM A209(T1),ASTM-A333(Gr.6), ASTM-A334(Gr ... .6), ASTM-A335( ...