Corrosion Processes and Technical Requirements for Spiral Steel Pipe

Spiral steel pipe anti-corrosion measures and procedures are as follows:
Fluid spiral pipe corrosion requirements are different in different compared with other domestic projects, the main difference is:
1. The inner anti-corrosion coating non-toxic anti-corrosion epoxy coating and the thickness required to achieve specific requirements, we usually use the cement mortar.
2. Corrosion outer coating spark test voltage than in the past more than doubled.
Faced with this demand that we should also work to improve the quality of a certain degree.
a. Sand we must strictly control the process, this is the first procedure is a rather important one process, and strictly control the quality of sand to ensure the quality rust and ensure the completion of the primer coating on both sides in one hour, so as to ensure the quality of the fundamental corrosion.
b. When doing the next step we will first glass fiber cloth impregnated with coal tar epoxy paint, then semi-mechanical roll wrapped, in the production process Method workers bulldozed the application roller to ensure uniform coating of the fine.
c. The spiral pipe corrosion life long, if the anti-corrosion pipes stacked in the open space of four months, the test, the inner coating no yellow pitting and other undesirable phenomena, the outer coating can reach spark experiment initial kV transmission.