Detailed Product Description Name: Seamless steel tubes for structural purposes , GB/T8162-1999 Uses: mainly ... ASTM 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, wire ...