➢The temperature of mandrel changes periodically in a process cycle.
➢ When the mandrel receives the heat transferred from the hot tube blank, it can only be

This process can be used as outer polyethylene and inner epoxy composite steel pipe. The performance of plastic coated steel pipe mainly means corrosion. The sa

1、 Galvanizing process of iron and steel parts acid zinc plating
Degreasing → derusting →│ → purification → drying └ alkaline zinc platin

Common methods for surface treatment of TC11 titanium rod and titanium alloy rod
The surface treatment technology of TC11 titanium alloy rod is mainly to improv

In the process of bending pipe processing, the service life of its anti-corrosion coating mainly depends on the type of coating, the coating quality of the prod