| YB |
China |
| |
|
| T5052 |
Geological drilling
pipe |
| T5035 |
Seamless steel tube
for auto semi-shaft casing |
| n1 |
Tube for cannon |
| 235 |
Geological Drilling
Tube |
| 2056 |
Welded steel pipes
for low pressure use |
| 2606 |
Rigid steel conduits |
| 4028 |
Welded Steel Pipe
for Deep-Well Dump |
| 4178 |
Welded steel pipes |
| 4435 |
Carbon steel tubes
for general structural purposes |
| 4437 |
Carbon steel tubes
for machine structural purposes |
| 4626 |
Carbon steel pipes
for pressure service |
| 5802 |
Stainless steel tube
for mechanical and structural purposes |
| 6445 |
Carbon steel pipes
for ordinary piping |
| 7141 |
Carbon steel square
pipes for general structural purposes |
| 7883 |
Stainless steel
boiler and heat-exchanger tubes |
| Z 12 |
Bearing Tube |
| |
|