Industrial 3PE anti-corrosion steel pipe details

1. Reasons for uneven anti-corrosion thickness of industrial 3PE anti-corrosion steel pipes
The industry standard SY/T0413-2002 does not stipulate the uniformity of thickness. It stipulates the low thickness value of the coating but requires that the low thickness value of the coating cannot be lower than the thickness value of the low point, rather than the thickness value of multiple test points. average value. If the coating thickness is uneven during the coating process of 3PE anti-corrosion steel pipe, it will inevitably cause a waste of coating materials. This is because when the coating thickness in thin parts reaches a low standard, the thickness in thick parts will be greater than Apply standard thickness.

Moreover, the uneven coating can easily cause the coating thickness in the thin parts of the 3PE anti-corrosion steel pipe to fail to meet the standard. The main reasons for uneven thickness during the production process include uneven material discharge at several points and bending of the steel pipe.

An effective method to control the uneven coating of 3PE anti-corrosion pipes is to adjust several extrusion dies to make the thickness of the anti-corrosion coating as uniform as possible in several places and to not allow unqualified steel pipes to be coated online.

2. Three common connection methods for industrial 3PE anti-corrosion steel pipes
(1) Welding connection: If there is no need to disassemble, welding can be used. This is a more traditional connection method. It has a simple structure and can directly connect components of any form; it is economical to use materials and does not weaken the cross-section; manufacturing and processing It is convenient and can realize automatic operation; the connection has good airtightness and high structural rigidity. Emergency repair efficiency is not suitable for today's environment.
(2) Flange connection: Weld the flange to the pipe mouth. To connect the two pipe mouths, first weld the flange or wire the flange, and then use the two welded flanges to connect. Add a spacer in the center.
(3) Grooved pipe fitting connection: This connection method is currently the main technology for connecting liquid and gas pipelines. The pipe fittings required for this connection method include: rigid joints, flexible joints, mechanical tees, and grooved flange bends. Head, tee, cross, reducer, blind plate, etc.