ASTM A192, seamless steel pipe. Certificate:ISO9001-2000,PED, API, TS16949 Out diameter:19.05- ... seamless steel pipe2) Certificate:ISO9001-2000,PED, API, TS169493) Standard:ASTM-A106, ASTM-A53, ASTM-A179, ASTM A192, ASTM-A210, ASTM-A213(T11/T12/T22), ASTM-A333, ASTM-A335(P11/P22), ASTM ... :T/T or L/C 9) Mini order:10 tons ASTM A192, seamless steel pipe for boiler and heat exchanger.