China manufacturer ASTM A53 ASTM A106B API5L hot rolled black steel  pipe

2) Thickness: 5mm -20mm

3) Tolerance:
Outer diameter: +/-10%
Thickness: +/-10%
Length: +/-10%

2:Standard: API 5L,API 5CT,DIN 1629/2448,DIN17175,ASTM A53,ASTM A106B,ASTM A179,ASTM A210,ASTM A335,

                       ASTM A519,GB 5310-1995,GB 3087-1999 

3. Materials: 
                     

1) ASTM A53, A106, A210, A252, A333
2) X42, X46, X52, X60, X65, X70
3) JIS STPG42, G3454, G3456
4) German St37, St42, St45, St52, DIN1626, DIN17175
5) Chinese 20#, Q345, 16Mn

4:Surface Treatment: black painted or according to customers' requirements

5:Length: 5.8M,6M, 9M, 11.8m, 12M

6. End finish: 
1) Plain
2) Beveled ends or threaded with sockets
3) Coupling and with plastic caps