Year1
- 厚度：
- 2、3、4
- 芯材：
- 聚氨酯
- 形状：
- 圆形
>Introduction:
> FRP direct-buried insulation pipes are closely combined with a steel pipe for transporting media, a polyurethane rigid foam insulation layer, and a glass fiber reinforced plastic outer sheath (glass fiber reinforced plastics). Become. It has very good mechanical strength and excellent corrosion resistance.
>First layer:
Working steel pipe layer, according to the design and customer requirements, generally choose seamless pipe (B) spiral welded pipe (B/) and straight seam welded pipe (B). After the surface of the steel pipe is treated with advanced shot blasting and rust removal technology, the rust removal grade of the steel pipe can reach level B in the standard, and the surface roughness can reach R micron in the B standard. After the surface of the steel pipe is decontaminated and rusted, a layer of cyanide anti-corrosion material is applied. The first function is to waterproof, and the second is to improve the bonding surface between the insulation layer and the steel pipe to form a whole.
>The second layer:
The polyurethane insulation layer is made by injecting rigid polyurethane foam solution into the cavity formed between the steel pipe and the special steel mold using a high-pressure foaming machine at one time. It is commonly known as the mold foaming process. Whether the polyurethane foam is full and there are any quality problems can be directly inspected. Its function is firstly to waterproof, but also to keep heat, and thirdly, to support the weight of the heating network. When the temperature of the conveying medium is:
℃℃, choose rigid polyurethane foam as the insulation layer. When the temperature of the transportation medium is: ℃℃, choose rigid polyurethane foam as the insulation layer. .
>The third layer:
The protective layer of fiberglass is made by mechanical wet winding. Its function is to protect the polyurethane insulation layer from damage by mechanical hard objects, and to be anti-corrosion and waterproof. It has good weather resistance, acid resistance and sea water resistance. However, the resin must use equal rigid and semi-rigid unsaturated resins. Glass fiber and cloth must use medium and low-alkali fiber yarns drawn with platinum pliers or kilns. It is prohibited to use fiber yarns with high alkali content drawn in earthen crucibles to ensure product quality.
>Product Features
:
>Has good physical properties and is stronger than steel, cast iron and plastic. The expansion coefficient of FRP pipe is roughly the same as that of steel, and the thermal conductivity coefficient is only % of steel. It is a good thermal and electrical insulator.
Good corrosion resistance and long service life, up to more than 10 years.
>The thermal conductivity is low, //, and the thermal insulation performance is excellent, and the water temperature drop is less than ℃/.
>Technical Advantages of Steel-Sleeved Steel Steam Insulation Pipe
>Application Areas:
>When the temperature of the conveying medium is: ℃℃, it is widely used in thermal insulation and cold insulation projects of various media within the range of ℃. China Collective Heating and Geothermal Development Co., Ltd. is developing thermal insulation and cold insulation projects in coal mines, petroleum, ports, chemicals and other industries. Since the fiberglass shell has better weather resistance than high-density polyethylene, it is especially suitable for pipe networks laid alternately between directly buried and overhead and heat pipes laid in coastal areas. net.
> Mainly used in water conservancy, sewage, petrochemical, electric power, metallurgy, medicine and other fields. It has the advantages of light weight, high mechanical strength, high corrosion resistance, easy installation and maintenance. This product has been successfully used all over the country.
>Technical parameters:
>Executive standard "Glass fiber reinforced plastic outer sheath polyurethane foam prefabricated direct buried thermal insulation pipe".
> < > Polyurethane layer data
< > Project
> Unit
> Technical indicators
< > Density
> /
> (any position)
< > Thermal conductivity
> /()
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< > Radial compressive strength
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< > Water absorption rate
> %
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< > Closed porosity
> %
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< > Void
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> /Insulation thickness
< > Average cell size
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< > Fiberglass protective pipe data relative
< > Project
> Unit
> Technical indicators
< > Density
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< > Flexural strength
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< > Tensile strength
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< > Water permeability
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> No penetration in water
< > Long-term mechanical properties
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< > Appearance
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> There should be no obvious scratches from residual foam and debris
< > Combined pipe data
< > Item
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> Technical indicators
< > Coaxiality
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< > Shear strength
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< > Exposed length of both ends of steel pipe
> Both ends of steel pipe
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Product specifications and models:
>
< > < > Steel pipe outer diameter
> Mold inner diameter
> Polyurethane thickness
> FRP thickness
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Notes: Additions to cast pipes: joints, elbows, tees, and joints. We can provide pipes of various diameters and insulation thicknesses and matching pipe fittings (elbow tee, reducer fixed section, etc.) according to user needs.
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