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The selection and structural design of steel pipes in central heating systems are key facilities for achieving efficient heat transfer, and directly affect heating efficiency and system stability. The following are its core points:
keyword Central heating system pipeline steel pipe Category Scene photos Related products Get a quoteThe selection and structural design of steel pipes in central heating systems are key facilities for achieving efficient heat transfer, and directly affect heating efficiency and system stability. The following are its core points:
1、 Structural Design
Three layer composite structure
Working steel pipe layer: As the core conveying layer, seamless steel pipes, spiral welded pipes or straight seam welded pipes are often used, and the surface is treated with shot blasting and rust removal to enhance durability.
Polyurethane insulation layer: rigid polyurethane foam is injected by high-pressure foaming process to form a closed cell structure with low thermal conductivity (0.022 – 0.027 W/m · K), effectively reducing heat loss and waterproof.
High density polyethylene (HDPE) protective layer: provides mechanical protection and anti-corrosion functions, adapts to environments between -50 ℃ and 150 ℃, and extends the service life of pipelines.
Special processing techniques
The insulation steel pipe of the black jacket is combined with a polyethylene outer protective layer and polyurethane, which has both insulation and anti-corrosion properties.
2、 Material and performance advantages
Thermal insulation performance
Polyurethane insulation layer can reduce heat loss by more than 30% during long-distance transportation, ensuring stable medium temperature.
Mechanical and Durability
The outer layer of steel or HDPE material has high strength, impact resistance, and is suitable for complex climates such as strong winds and extreme temperatures.
Anti corrosion treatment (such as fiberglass casing) can resist environmental erosion and can be used for more than 30 years.
Convenience of construction and maintenance
Prefabricated direct burial design reduces pipe trench construction and shortens the construction period; Overhead pipelines are easy to maintain.
3、 Technical specifications and standards
The working steel pipe shall comply with standards such as GB9711 (spiral welded pipe), and the surface treatment shall reach Sa2 level roughness.
The foam density of the insulation layer is ≥ 60 kg/m ³, and the compressive strength is ≥ 0.3 MPa to ensure structural stability.
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