Product performance of fire-fighting plastic-coated steel pipe

1. The fire-fighting plastic-coated steel pipe has good hygienic performance and meets the national standard: "Automatic sprinkler system coated steel pipe". The pipe does not accumulate fouling and does not breed microorganisms. It is a healthy and sanitary pipe to ensure that the fluid is free from secondary pollution. Galvanized steel pipes are susceptible to rust and cause secondary pollution to the conveying fluid.

2. It has excellent mechanical strength: the plastic-coated steel pipe has the mechanical strength of steel pipe and the corrosion resistance of plastic pipe, and it has strong resistance to impact, bending, pressure and strength of external forces.

3. The heat loss of the product is small, and the thermal conductivity of the steel pipe is as high as that, and the plastic-coated composite steel pipe is coated with plastic on the inside and outside, so the same thermal insulation design reduces the heat loss of the plastic-coated composite steel pipe.

4. The service life of the fire-fighting plastic-coated steel pipe is more than 50 years, while the galvanized steel pipe is generally 20 years, which will incur relatively large maintenance costs in 7-8 years.

5. The product has good corrosion resistance and weather resistance. The inner and outer walls are coated with plastic, and the corrosion resistance of acid, alkali and salt is excellent. It can be used in harsh environments and is resistant to cathodic stripping. Tin-plated steel pipes are susceptible to corrosion due to underground stray currents and soil corrosion. Every year, nearly 4 billion tons of steel are rusted and lost around the world, and the maintenance and protection costs are high.

6. Its fluid resistance is small, the inner wall is smooth, the conveying efficiency is high, and the friction coefficient is 0.15-4mm. The fire-fighting plastic-coated steel pipe has low energy consumption loss and can reduce the head of the water pump. Since the head of the water pump can be converted by changing the diameter of the impeller, the flow can be increased or electric energy can be saved. The inner wall of galvanized steel pipe is prone to scaling and clogging.

7. The connection methods of the plastic-coated composite steel pipe are diversified, and the connection methods are threaded, flange welding and groove connection.

8. The product has anti-vacuum performance. The length of the pipe section test piece is to use appropriate measures to block the pipe inlet and outlet. Gradually increase the negative pressure mercury column from the inlet and keep it for 1 min. After the test, check that the inner coating should not fall off.