Tube class

Representative Brand

Specification (mm)

Executive standards

Usage

Tubing sleeve

J55, K55, N80, L80, C90, T95, P110, C110, Q125 and other steel grades, and anti-corrosion series, anti-collapse series oil casing

Outer diameter: 56.5-339mm

Wall thickness: 4-40mm

API5CT,ISO11960,GB/T19830, GOST632-80, etc

Drilling of oil and gas wells

Line pipe

B- X70 steel grade, and corrosion resistance series, low temperature resistance, acid service, marine service series line pipe

API 5L,ISO 3183, ASTM A333, ASME SA333, etc

Oil and gas transmission

Cylinder tube

37Mn series, CrMo series, 4130X, etc.

GB18248,JIS G3429, ASTM A372/A372M, EN10297-1, etc.

Industrial Gas Storage and Transportation

Pipe for oil cylinder

E355, E470, 25Mn, Q345B

EN10297-1, EN10210-1,GB/T3077

Construction Machinery

Hydraulic Strut Tube

27SiMn, 30CrMnSi, 30CrMo

GB/T3077, etc.

Construction Machinery

Axle tube

20Mn 2/1, SAE1527

GB/T 17396, YB/T 5035

Automobile industry

High pressure, low and medium pressure boiler tubes

10#,20#,20G,25MnG,15CrMoG,12Cr1MoVG

GB/T 8162;GB/T8163;ASTMA519

Main steam pipe, superheater pipe, reheater pipe, etc. of electric power, thermal power and other boilers

Other

10#20#45#40Cr,27SiMn,Q355,Q460,42CrMo

GB/T 8162;GB/T 8163;ASTM

Manufacture of structural parts, pipe fittings, conveying fluids, etc.