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Polyurethane insulated steel pipe
The full name of polyurethane prefabricated insulation pipe is high-density polyethylene outer protective pipe, rigid polyurethane foam plastic prefab
Product details
The full name of polyurethane prefabricated insulation pipe is high-density polyethylene outer protective pipe, rigid polyurethane foam plastic prefabricated directly buried insulation pipe, which is commonly referred to as polyurethane insulation pipe. The utility model is composed of a working steel pipe for conveying medium, a polyurethane rigid foam plastic insulation layer, and a polyethylene plastic outer protective pipe from the inside to the outside.
The product complies with national standards:《GB/T 29047-2012High density polyethylene external protection pipe, rigid polyurethane foam plastic prefabricated directly buried insulation pipe and pipe fittings
Characteristics of polyurethane insulation pipe products
1The rigid polyurethane foam with low thermal conductivity and good thermal insulation performance is used as the thermal insulation material, which has excellent thermal insulation；
2Excellent insulation performance, after normal operation130Transportation of water at ℃40When kilometers away, the cooling is only1Around ℃ ；
3. Convenient construction, environmentally friendly and efficient, no need to build pipe trenches, can be directly buried underground or in water after excavation; No need for on-site insulation, saving labor, not polluting the environment, and low overall cost;
4It also has good corrosion resistance and impact resistance under low temperature conditions, and can be directly buried in frozen soil layers;
5. Prefabricated insulation pipes are made of corrosion-resistant materials（HDPEHigh density polyethylene outer sleeve, not affected by biological and chemical corrosion;
6. The three-layer materials of the product are tightly combined. To ensure the integration of prefabricated buried insulation pipes, the outer surface of the steel pipe needs to be shot blasted and rust removed before foaming, and the inner surface of the outer plastic protective pipe needs to be corona treated.
Structure of polyurethane insulation pipe
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Working steel pipe layer (inner layer):According to the design and customer requirements, seamless steel pipes, spiral welded pipes, and straight seam welded pipes are generally selected. After advanced shot blasting and rust removal process, the rust removal grade of the steel pipe can reach Sa2.5 (near white grade). The inner wall of the steel pipe can be treated with internal anti-corrosion treatment according to the plastic coated steel pipe, or other anti-corrosion treatments can be used as needed.
Polyurethane insulation layer (intermediate layer):It is made by injecting the original liquid of rigid polyurethane foam into the cavity formed between the steel pipe and the outer protective layer with a high-pressure foaming machine. It is commonly known as the "pipe in pipe foaming process". Its functions include waterproofing, insulation, and supporting the self weight of the heating network.
High density polyethylene protective layer (surface layer):The function of high-density polyethylene protective layer is to protect the polyurethane insulation layer from mechanical hard objects and prevent corrosion and waterproofing.
Application field of polyurethane insulation pipe
- Pipeline network for transporting liquids and gases；
- Chemical pipeline insulation engineering；
- Petroleum, chemical, and centralized heating pipelines；
- Central air conditioning ventilation duct；
- Other municipal engineering pipelines；
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