Structural steel for seamless steel tubes: GB8162-99
2. Fluid Conveyance SMLS Steel Pipe: GB8163-99
Boiler Seamless Steel Pipe: GB3087-1999
Boiler High-pressure Seamless Pipe: GB5310-95 (ST45.8-III type)
5. High-pressure Seamless Steel Pipe Equipment: GB6479-1999
6. Seamless Steel Tubes for Geological Drilling: YB235-70
7. Seamless Steel Pipe for Oil Drilling: YB528-65
8. Seamless Steel Pipe for Crude Oil Cracking: GB9948-88
9. Seamless Tube for Oil Drill Collars: YB691-70
10. Seamless Steel Tubes for Automotive Half Shafts: GB3088-1999
11. Seamless Steel Pipe for Shipbuilding: GB5312-1999
12. Cold Drawn and Cold Rolled Precision Seamless Steel Tubes: GB3639-1999
13. Various alloy pipes: 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo.