... pipe, Alloy seamless steel pipeQ345-B, Structure pipe High AlloyGB 5310, G3458, G3462,A335-P12, A213-T2, Boiler pipe, DIN 17175, ASTM A335, A213A213-T11, A335-P2, High temperature A335 ... Equipment PermissionISO 9001:2000Main productsSeamless carbon pipe Seamless oil casing Seamless alloy Applicationfor ordinary services& tubing, pipeline steel pipes pipes for special serviceCompany fileProduction ...