liquid pressure and aero dynamic canister for precise inner diameter seamless steel tube GB3639-2000 Prdecision lnner Diameter Seamless Steel Tube used for hydraulic and pneumatic cylinders (GB8713-88) The enterprise follows the national standard or GB3639-2000, and the users plsce orders in accordance with this standard. The outer diameter and inner diameter specifications are up to the requirements specified in GB3639-83 "Cold Drawing or Cold Rolling Precision Seamless Steel Pipe". And the measurement of the inner diameter is precise. This type of tube is widely used for making hydraulic and pneumatic cylinders, etc. The tolerance of the inner diameter measurement of the steel tube is up to the stipulations of GB1801-79 "Tolerance and Dimension Matching to 500mm Hole, Shaft Tolerance Range and Matching".
