Detailed Product Description Name:Seamless steel tubes and pipes for high pressure boiler:(1)Standard: GB5310-95 ST45.8(2) Representative materials: ... A53,ASTM A106,AP25L,API5CT, GB8162, GB8163, GB3087, seamless steel pipe. (2) we also supply an extensive range of steels ... , such as" angles, flat steel, square steel, welded pipe, galvanized pipe, steel mill, hot-rolled steel, I-steel, channel steel ...