We have large quantity alloy tubes in stock, range from 2inch to 24inch, grade such as P9, P11 etc to used for the heating surface of high temperature boiler, economizer, header, superheater, reheater and for petrochemical industry etc. Implement the relevant specifications such as GB3087, GB/T 5310, DIN17175, EN10216, ASME SA-106M, ASME SA192M, ASME SA209M, ASME SA -210M, ASME SA -213M, ASME SA -335M, JIS G 3456, JIS G 3461, JIS G 3462 and so on.