... GB3087, DIN 17175St52.4, 16Mn, Boiler pipe, Alloy seamless steel pipeQ345-B, Structure pipe High AlloyGB 5310, G3458, G3462,A335-P12 ... , A213-T2, Boiler pipe, DIN 17175, ASTM ... 2000Main productsSeamless carbon pipe Seamless oil casing Seamless alloy Applicationfor ordinary services& tubing, pipeline steel pipes pipes for ...