What Is Underground Coated Steel Pipe

Many people often confuse plastic coated pipes and 3PE anti-corrosion pipes because they are very similar with their appearance. Coated plastic pipe, also known as underground coated steel pipe or steel-plastic composite pipe, is a steel pipe with a molten organic layer, the thickness of which is 0.5~1.0mm on the inner and outer walls, such as modified polyethylene (PE), ethylene-acrylic copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP) or non-toxic polyvinyl chloride (PVC). This underground coated steel pipe combines the advantages of steel and plastic. It not only has the advantages of high strength, easy connection, water impact resistance, etc., but also eliminates the disadvantages of corrosion, pollution, scaling, low strength, etc., and the poor fire resistance of plastic pipes and steel pipes in water. It provides long life, more economical design life can reach 50 years.

Fire protection plastic coated steel pipe is the most commonly used plastic coated steel pipe, steel pipe as the base pipe, external wall coating high adhesion, impact resistance, corrosion resistance weathering thermosetting powder coating and internal wall coating food grade hygiene-grade thermoplastic powder coating, and then by sandblasting and chemical treatment, preheating, internal coating, external coating, curing and other post-treatment made.

Features of underground coated steel pipe

The pipe wall is smooth and pulsation free, suitable for underground or another wet environment and can withstand very high or low temperatures.

It has strong pressure resistance and can even withstand 6MPa.

With excellent anti-interference ability, it can effectively screen signal interference from outside.

The coating itself also has good electrical insulation and will not cause corrosion.

Specifications of underground coated steel pipe

Color: black, grey, blue, red, white, green;.

Coating thickness: PE (modified polyethylene) coating thickness of 400um - 1000M, EP (epoxy resin) for 100um-400um;

Coating method: hot dip EP, epoxy internal/external spray;

Specification: DN15 - DN1660.

Ambient temperature: -30℃ to 120℃.

Connections: Wire buckles (DN15 - DN100), grooves (DN65 - DN400), flanges (for any diameter), welded type, bimetallic connections, sockets, pipe fittings, sealing connections and so on.

Application of underground coated steel pipe

1. Plastic coated pipes can be used in various circulating water systems (civil circulating water and industrial circulating water), fire-fighting water supply systems, building water supply and drainage, urban sewage pipes.

2. Coal mine gas discharge, slurry transportation, drainage and ventilation systems.

3. Chemical anti-corrosion pipeline for transmitting various chemicals, such as acid, alkali and other corrosive media.

4. Used to protect buried pipes and wires and cables for communication cables

5. It can ensure the normal operation of central air conditioning HVAC circulation system central air conditioning water circulation system.