Plastic-coated steel pipe, also known as plastic-coated pipe, steel-plastic composite pipe, plastic-coated composite steel pipe, is based on steel pipe, through spraying, rolling, dipping,
Suction and other processes weld a layer of plastic anti-corrosion layer on the inner surface of the steel pipe or a steel-plastic composite steel pipe with a plastic anti-corrosion layer welded on the inner and outer surfaces.
The plastic-coated steel pipe has excellent corrosion resistance and low friction resistance. Epoxy resin coated steel pipe is suitable for water supply and drainage, seawater,
The transportation of warm water, oil, gas and other media, PVC plastic-coated steel pipe is suitable for the transportation of drainage, seawater, oil, gas and other media
deliver.
1、Scope of application:
1. It is used in chemical fluid transportation.
2. Buried pipes and passage pipes of wires and cables.
3. Ventilation pipes, water supply and drainage pipes of mines and mines.
4. Applied to urban sewage pipelines.
5. Various forms of circulating water systems (such as civil circulating water, industrial circulating water), plastic-coated steel pipes have excellent anti-corrosion properties
Performance, anti-corrosion time can reach 50 years.
6, used in fire pipeline water supply system.
7. Water supply and drainage transportation of various buildings (suitable for cold and hot water systems in hotels, hotels, and high-end residential areas).
2、 Process flow:
1. The paint enters the factory and directly enters the electrostatic spraying after passing the quality inspection, and returns to the manufacturer if it fails;
2. After the steel pipe enters the factory and passes the quality inspection, the nozzle is processed. First, the nozzle burr and the welding seam are ground (the height of the welding bar cannot exceed
0.5mm);
3. After the nozzle is processed, go into pickling (the concentration of pickling should not exceed 30% hydrochloric acid, soak in the pickling tank for more than 3 minutes), and sandblasting and rust removal can be carried out for the smaller diameter;
4. After the pickling is completed, it will enter the phosphating. It is necessary to put the steel pipe after the pickling into the phosphating tank immediately and soak it horizontally, and then take out the phosphating tank. Purpose It is to produce a layer of phosphating film on the surface of the steel pipe, which can not be easily oxidized in a short time and avoid corrosion again.
Post time: Jul-13-2022