Jinzhong polyurethane prefabricated directly buried insulation pipe is booming

  The high density polyethylene plastic external protective polyurethane foam prefabricated directly buried insulation pipe, good thermal insulation material should have lower thermal conductivity
It does not deteriorate when affected with moisture, has good heat resistance, does not corrode metal, is light and has more voids; It has certain mechanical strength and will not be damaged by external force; Easy processing, low cost and other characteristics
Commonly used thermal insulation materials are expanded perlite and its products, glass wool and its products, rock wool products, microporous calcium silicate, aluminum silicate fiber products, foam plastics, foam asbestos and so on
nbsp; Prefabricated polyurethane insulation pipe is suitable for transportation at - 50 ℃ & mdash; Various media within 150 ℃, which are widely used in central heating, cooling and hot oil transportation, as well as thermal insulation and cold insulation projects in warm rooms, cold storages, coal mines, petroleum, chemical and other industries Polyurethane insulation pipe is divided into three layers from inside to outside: First floor: working steel pipe floor According to the design and customer requirements, seamless steel pipe, spiral steel pipe and straight seam steel pipe are generally selected
After the steel pipe surface is treated by advanced shot blasting, the rust removal grade of steel pipe can reach SA2 in gb8923-1988 standard, and the surface roughness can reach gb6060 R = 12
5 microns in 5-88 standard Second layer: polyurethane insulation layer: The rigid polyurethane foam is injected into the cavity formed between the steel pipe and the outer sheath by the high-pressure foaming machine, which is commonly known as &ldquo
Tube in tube foaming & rdquo The third layer: high density polyethylene protective layer: Prefabricated into black or yellow polyethylene plastic pipes with a certain wall thickness
Its function is to protect the polyurethane insulation layer from mechanical hard objects, and the other is anti-corrosion and waterproof Characteristics of insulation pipe Prefabricated polyurethane insulation pipe - advantages and Characteristics 1
It has strong corrosion resistance and waterproof ability and low comprehensive cost According to the calculation of relevant departments, the double pipe heating pipeline can generally reduce the project cost by about 25% (using FRP as the protective layer) and 10% (using high-density polyethylene as the protective layer) 2
Low heat loss and energy saving
The heat loss of traditional pipes is only 25% Prefabricated polyurethane insulation pipe has thermal conductivity of 0
022kcal/m
h
℃ and hydrophobicity of 0
03kg/cm3 3
Long service life The correct installation and use can make the service life of the pipe network reach 30-50 years, and the maintenance cost is very low 4
Less land occupation and fast construction are conducive to environmental protection It can reduce the amount of earth excavation by more than 50% and the amount of civil masonry and concrete by 90% Development status of polyurethane thermal insulation pipe in China; Prefabricated polyurethane insulation pipe is an important factor affecting energy saving
The development and application of insulation pipe has attracted more and more attention all over the world
After the 1970s, foreign countries generally pay attention to the production and application of insulation pipes, and strive to greatly reduce energy consumption, so as to reduce environmental pollution and greenhouse effect
Foreign thermal insulation industry has a long history, and new thermal insulation materials are constantly emerging
Before 1980, the development of thermal insulation pipe was very slow
A few thermal insulation plants can only produce a small amount of underground directly buried thermal insulation pipe
However, after more than 30 years of efforts, especially after nearly 10 years of rapid development, many products have been used more and more widely from scratch, from single to diversified, and from low to high quality
Polyurethane material is a commonly used thermal insulation material in the world
Rigid polyurethane has many excellent properties and is widely used in the field of thermal insulation in Europe and America
About 49% of thermal insulation materials in developed countries such as Europe and the United States are polyurethane materials, while this proportion is less than 20%
Therefore, there is still much room for the development of polyurethane insulation pipe