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