coated steel pipe, hot dip plastic steel pipe, internal external coated steel pipe

Pipe Knowledge

Product characteristics of internal and external plastic coated steel pipes and transportation requirements of hot dip plastic steel pipes

Date:2025-01-16
The internal and external plastic coated steel pipes are coated with epoxy resin on the inner and outer walls, with a smooth surface, reduced fluid resistance, increased flow, no scale formation, and generally no growth of microorganisms. The service life of fire water supply (gas) pipes has been greatly improved by plastic coating treatments such as water delivery, buried pipes, acid, alkali, and salt corrosion. The service life can reach more than 50 years. The pressure range of fire pipes is 0-2.5mp. Fire plastic coated steel pipes are based on steel pipes. The exterior wall adopts thermosetting powder coatings with high adhesion, impact resistance, corrosion resistance, and weather resistance. The inner wall adopts thermoplastic powder coatings with high adhesion, corrosion resistance, and food-grade hygiene. The internal and external plastic coated composite steel pipes for water supply are manufactured by sandblasting chemical double pretreatment, preheating, internal and external plastic coating, maintenance, and post-treatment. It is a cost-effective product upgraded from traditional steel plastic pipes and galvanized pipes. The product has passed the national solid fire extinguishing system professional certification and fire-resistant component quality inspection center.

By applying plastic coating to steel pipes or galvanized pipes for corrosion protection, the corrosion and scaling problems of ordinary steel pipes during transportation are solved. Pipeline blockage and spray blockage are eliminated, and the service life of the pipeline is increased. The service life of plastic coated steel pipes is more than 50 years. Flame retardants are added to the powder coating of plastic coated steel pipes and modified with epoxy resin powder. The coating has excellent temperature resistance and will not burn or soften after long-term use.

Product features of internal and external plastic coated steel pipes:
1. Sanitary, non-toxic, pollution-free, microbial-free, ensuring fluid quality
2. Resistant to chemical corrosion, soil, and marine biological corrosion, and cathodic stripping
3. The installation process is mature, convenient, and fast, similar to ordinary galvanized pipe connection
4. Extremely flame retardant, non-flammable at 300℃
5. The pipe wall is smooth, improving the transportation efficiency and long service life

Technical parameters of internal and external plastic coated steel pipes:
Coating material: modified heavy anti-corrosion epoxy resin
General Color: red
Coating thickness: 250um-550um
Coating method: internal and external spraying
Product specifications: dn15-dn1200
Ambient temperature: -30℃-80℃ (peak: 760℃); conventional pressure: 0.1mpa-2.5mpa

Hot-dip plastic steel pipes must not be thrown or hit violently during transportation. Use nylon belts for lifting during loading and unloading. Hot-dip plastic steel pipes should be stacked indoors or in a cool place. When stored in the open air, they should be covered with a canopy and kept away from heat sources and fire. It should not be piled up outdoors in direct sunlight or severe cold for a long time. It should not be mixed with toxic and hazardous substances.

Precautions for hot-dip plastic steel pipes: pipes that transport hot water can transport cold water, but pipes that transport cold water cannot transport hot water. The cross-section of the plastic-coated composite pipe should not be in contact with water, non-plastic lined pipe fittings should not be used instead of plastic lined pipe fittings, plastic-coated pipe fittings in malleable cast iron pipe fittings should not be used, injection joints should be included in convex threaded steel flanges, special transition pieces should be used for threaded connections with valve ports, special rubber seals should be used for connections with water supply bolts, and special rubber seals should be used for grooved connections.
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coated steel pipe, hot dip plastic steel pipe, internal external coated steel pipe
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