What are Large-Diameter Fire-Fighting Plastic-Coated Steel Pipes

Currently, the specifications of internally and externally plastic-coated steel pipes are quite comprehensive and complete in the steel pipe market, and all supplied products meet the relevant national quality standards. Internally and externally plastic-coated steel pipes are a type of composite steel pipe, possessing the performance of both steel and plastic pipes. Therefore, they can be used in various liquid transportation fields, such as cold water, hot water, sewage, pharmaceuticals, and chemicals.

First, the characteristics of internally and externally plastic-coated steel pipes:
1. The base pipe of internally and externally plastic-coated steel pipes uses high-quality steel pipes, while the inner wall uses food-grade hygienic coating. Therefore, internally and externally plastic-coated steel pipes are hygienic to use, do not produce chemical reactions, and are green and environmentally friendly building materials.
2. Internally and externally plastic-coated steel pipes are manufactured using a homogeneous hot-melt connection process, allowing you to complete the installation work in a short time, which is simple, convenient, time-saving, and labor-saving.
3. The thermal conductivity of internally and externally plastic-coated steel pipes is very low, only 50% of that of metal pipes. Therefore, during hot water transportation, heat loss is very small, possessing excellent energy-saving and heat-insulating performance. 
4. The overall weight of internally and externally coated steel pipes is approximately 10% that of steel pipes, while their compressive strength, impact resistance, heat resistance, and toughness are higher, resulting in lightweight yet high-strength.
5. The special coatings used on the inner and outer surfaces of internally and externally coated steel pipes have excellent smoothness, thus reducing resistance during liquid transportation and significantly decreasing energy consumption.
6. The materials used in internally and externally coated steel pipes have high corrosion resistance, preventing scaling during use and eliminating pipe blockages and yellow rust spots.
7. Internally and externally coated steel pipes have a long service life.

Second, the performance of internally and externally coated steel pipes:
1. The adhesion of the inner and outer coatings of internally and externally coated steel pipes is significantly enhanced compared to other types, and the materials used in the coatings have excellent electrical insulation properties, making the steel pipe superior in impact resistance and pressure bearing capacity, preventing embrittlement and electrolytic corrosion.
2. The internally and externally coated steel pipes use environmentally friendly and harmless coating products, which are not prone to scale buildup and will not breed other microorganisms, thus ensuring the quality of the liquid inside the pipe.
3. The internally and externally coated steel pipes have excellent physical properties and very weak chemical reactions, making them less prone to corrosion or peeling and suitable for use in harsh environments.
4. The smooth inner wall of the internally and externally coated steel pipes improves transportation efficiency and extends their service life.
5. The installation method for internally and externally coated steel pipes is similar to that of traditional galvanized steel pipes, making the installation process simple and convenient.