1：Boiler Pipe（ASTM A335 P5,P9,P11,P22,P91, P92 Etc.）

Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

2：Line Pipe（API 5L Gr.B X42 X52 X60 X65 X70 Etc）

Seamless Pipeline Used For High Quality Transport The Oil, Steam And Water Drawn From The Ground To The Oil And Gas Industry Enterprises Through The Pipeline

3：Oiled&Casing Pipe （API 5CT J55,K55,N80,L80,P110, Etc）

Petroleum and natural gas industries ——Steel pipes for use as casing and tubing for wells

4：Seamless steel tubes for mechanical construction(GB/T8162 42CrMo,EN10210 S235GRH,EN10219 S355JOH)

Mainly used for mechanical seamless steel pipe, carbon steel pipe and alloy mechanical pipe.

5：Boiler Superheater Heat Exchanger Alloy Pipes Tubes（ASME SA179/192/210/T11/T22/T91）

Seamless Alloy Steel  Pipes Ferritic And Austenitic For Boiler Superheater Heat Exchanger Alloy Pipes Tubes