1. Seamless steel pipes:
Material: 10#, 20#, 35#, 45#, 50#, Q345B, 16Mn, 27SiMn, 35CrMo, 15CrMo,

12Cr1MoV, 20Cr, 40Cr, 37Mn30CrMo
Standard: GB8162-1999, GB8163-1999, GB3087-1999, GB5310-1999
2. Square tube(rectangular tube): Material: Q235, Q345, seamless steel,

20#, 16Mn, stainless steel
3. Primary carbon steel pipe:
Material: 10#, 20#, 35#, 45#, 20G, 410, American Standard: A106B,

ST45.8-III
Standard: Liquid transportation pipe GB/T8163-1999 
Low-middle pressured boiler pipe GB3087-1999 
High-pressured boiler pipe GB5310-1995 
SPECIAL FERTILIZER pipe GB6479-2000
Oil cracking pipe GB9948-1998 
Marine steel pipe GB5312-1999
4. Stainless steel pipe:
Material: National Standard: (American Standard), 1Cr18Ni9Ti,

0Cr18Ni10Ti (321), 0Cr18Ni9 (304), 00Cr18Ni10 (304L), 0Cr17Ni12Mo2

(316), 00Cr17Ni14Mo2 (316L), 0Cr25Ni20 (310S)
Standard: GB/T14975-2002, GB/T14976-2002, GB/T13926-91, GB/T9948-88
5. Welded steel pipe: Material: Q235, Q235B  Standard: GB/T3092-93
6. Galvanized steel pipe: Material: Q235, Q235B
7. Alloy steel pipe:
Material: National Standard: (American Standard), 12Cr1MoV (A335P91),

15CrMo (A335P12), Cr5Mo (A335P5), 10CrMo910 (A335P22), 1+Cr+Mo

(A335P11), Cr9Mo (A335P9), 16Mn (Q345B) (27SiMn), 07Cr2AlMo, 09CrMoAl,

12Cr1MoVG, 15CrMoG, 12Cr2MoWVTiB, 5CrMo, T91, T92
Standard: GB5310-1995,GB9948-88, GB6479-2000, DIN17175-79,  ASTM

A335/335M, ASTM
8. Low alloy pipe: Material: 16Mn, Q345B, Q345C, Q345D; Standard:

GB/T8163-1999
9. High pressure boiler tube:
Material:: National Standard: (American Standard:)
20G GB5310-1995 (ST45.5-III, DIN17175-79), 12CrMoV (T12), 10CrMo910

(12Cr2Mo)
15CrMo (A335P11), Cr5Mo (SA106B), 12CrMoVG, 15 Cr1MoVG,
12Cr1MoVG GB5310 (ASMESA210/SA106), 15Cr1MoVG GB5310 (ASMESA210/SA106).
10. Low / medium pressure boiler tube: Material: 20G, 16Mn  Standard:

GB3087-99
11. Alloy structural pipe: Material: 20Cr, 30Cr, 40Cr
12. Spiral tube: Material: Q235, Q235B, Q345
13. Pipes as per Japanese Standard:: Material: JISG3454, G3455, G3456
14. Pipes as per American Standard:: Material: T2, T5, T11, T12, T22,

T23, T91    
Standard: ASTM A-213, ASTM A-106B
15. Flat oval: Material: ordinary carbon steel, seamless steel, 20#,

16Mn, stainless steel
16. Oval: Material: ordinary carbon steel, seamless steel, 20#, 16Mn,

stainless steel
17. Corrugated pipe: Material: 10#, 20#, 16Mn, 0Cr18Ni9 (304)
18. Petroleum cracking pipe: Material: 20#, 16Mn  Standard: GB9948-1988
19. Special pipe for fertilizer: Material: 20#, 20G, 16Mn  Standard:

GB6479-2000, GB6479-86
20. Petroleum steel pipe: Oil pipe J55 (37Mn5), casing pipe J55

(37Mn5), H40, K55, M60, N80  
Standard: API 5CT
21. Geological pipe: Material: 35CrMo, DZ40, DZ50, DZ60, N80
22. Shipbuilding pipe: Material: 20#, 16Mn
23. Double-faced submerged-arc welding spiral tube:
Material: Q235, Q235B, Q345, 20#, X42-65 
Standard: APISpec5L, GB/T9711.1/2-97/99, SY/T5037-2000
24. Fluid pipes:
Material: 20#, DZ40, Q345, Q345A, Q345B, Q345C 
Standard: GB3087-1999, GB8163-1999, YB23-70
25. Straight seam electric resistant welded pipe:
Material: Q235, Q235B, Q345, 20#, J55, X42-65 
Standard: GB/T3091-2001, APISpec5L, GB/T9711.1/2-97/99, GB/T13793-92
26. Pipes for transporting petroleum and natural gas:
Material: A, B, X42, X46, X52, X56, X60, X70, X80  Standard: GB/T9711

API-5CT
27. Hydraulic supporting tube:
Material: 27SiMn, 10#, 20#, 35#, 45#, 20Cr, 40Cr  Standard: GB8162-87
28. Shaped tube: Material: 20#, 45#