Insulation Large Diameter Spiral Steel Pipe Structure and Features

3 125

Insulation Large Diameter Spiral Steel Pipe Structure and Features
Insulation large diameter spiral steel pipe features:
Polyurethane foam has good mechanical properties and thermal insulation properties. It can withstand 120°C under normal conditions. It can withstand 180°C by modifying or combining with other insulation materials.

Insulation Large Diameter Spiral Steel Pipe
Spiral steel pipe has a strong thermal insulation property, which can ensure that the temperature of the internal transport material is not changed by the outside world and has good cold resistance in winter. Spiral steel pipe soundproofing performance is very good, to avoid the sound of liquid flowing in the pipeline when the transport is disturbing people. At the same time, the spiral steel pipe is able to do anti-corrosion and does not absorb water, so that the installation position of the pipeline is not limited, and it can be used at various locations. Spiral steel pipe construction is simple and efficient, high efficiency, reduce capital costs. Spiral steel pipes are used for low heat loss and can save energy.
According to calculations by related departments, dual-control heat supply pipes can generally be reduced by 25% of the construction cost (using FRP as a protective layer) and 10% (using high-density polyethylene as a protective layer).
Spiral steel pipe thermal conductivity: λ = 0.013-0.03kcal/m • h • oC, much lower than other pipe insulation materials commonly used in the past, the insulation effect increased by 4 ~ 9 times. In addition, its water absorption is very low, about 0.2 kg/m2. The reason for the low water absorption is that the closed cell ratio of the polyurethane foam is as high as about 92%. The low thermal conductivity and low water absorption, coupled with insulation layers and high-density polyethylene or FRP shells with good water-repellent properties, have changed the status of the traditional trench laying heating pipe “wet cotton padded jacket”, which greatly reduced the number of heating pipes. The overall heat loss, thermal network heat loss is 2%, less than the international standard of 10%.
Insulation large diameter spiral steel pipe structure:
(1) Core pipe: Working steel pipe for steam delivery.
Core tube material properties, outer diameter dimensions, dimensional tolerances, and minimum wall thickness are in compliance with the relevant national or industry standards. The surface of the core tube removes rust, grease, moisture, and other contaminants.
(2) Protection cushion: The sandwich between the core tube and the insulation layer to prevent the inorganic insulation from being damaged due to displacement of the core tube. When the core pipe is made of spiral welded steel pipe and the inorganic insulation layer is a hard material, a protective cushion layer is provided. The protective cushion layer is generally made of aluminum silicate felt, density ≤ 192kg/m3, room temperature thermal conductivity ≤ 0.056w/(m•k), and heating line shrinkage rate ≤ 4%.
(3) Organic insulation layer: insulation layer made of organic insulation material. Polyurethane rigid foam, density 55-65kg/m3, compressive strength ≥ 0.2MPa, normal temperature thermal conductivity ≤ 0.027w/(m•k), water absorption ≤ 3%, applicable temperature ≤ 140°C.
(4) Insulation layer: Insulation layer made of high temperature resistant inorganic insulation material. Room temperature thermal conductivity ≤ 0.055w (m•k) Depending on the structure, microporous calcium silicate (density ≤220kg/m3), magnesium silicate, rock wool (density ≥110kg/m3) can be selected, and the moisture content of the material can be selected. Temperature, compressive strength and other indicators can also meet relevant requirements.
(5) Outer protective pipe: An outer protective layer that protects the insulation from groundwater, supports the core pipe, and can withstand a certain pressure. According to different materials, it is generally divided into steel outer tube, high density polyethylene plastic outer tube, glass fiber reinforced plastic outer tube, composite outer tube and so on. This product generally uses high-density polyethylene (PE) as the outer protective tube, but in areas with high water levels or surface water, steel outer protective tubes must be used. Steel outer tube material properties and tolerances are in compliance with relevant national or industry standards. The outer surface of the steel tube is shot blasted.


Related post


  1. Din 2448 ST52.3 steel pipe
    Din 2448 ST52.3 steel pipe 1335063281 -  Reply / Edit

    /alloy tube/alloy pipe and tube/ alloy steel pipe/alloy steel tube/ alloy seamless steel pipe/alloy seamless pipeA335 P1 alloy pipe/alloy steel pipe/astm a213 t9 pipes/A335 P2 alloy steel pipe/A335-P22A369-FP22/A213-T5 alloy steel mechanical.

  1. ASME SA213 T22 alloy pipe
    ASME SA213 T22 alloy pipe 1333807498 -  Reply / Edit

    ASME SA213 T22 alloy pipe,Alloy steel Pipe: Diameter: 15~1200mm; Thickness: 1~200mm; Length: Max25meters ,The pipes are widely used in the fields of petroleum, electric power, boilers, chemical, ship building, geology exploration, mechanic a.

  1. JIS G3445 STKM 13A pipe
    JIS G3445 STKM 13A pipe 1332385480 -  Reply / Edit

    JIS G3445 STKM 13A pipe,Commodity:seamless precision steel tube,With API 5L ,API 5CT certification and ISO quality system certification.We mainly produce the seamless steel tubes with the external diameter of 108 -219mm and wall thickness of.

  1. Large Diameter Hot Rolled Steel Pipe
    Large Diameter Hot Rolled Steel Pipe 1337585967 -  Reply / Edit

    Large Diameter Hot Rolled Steel Pipe Size: 1/2"--36" Sch 40, sch 80, xs, xxs Length: 1----12m Special pipe: API pipe Manufacture technique: Hot rolled Model number: 20# or others Grade: Carbon steel, stainless steel Usage: For.

Latest Comments

  • p11 alloy steel pipe
    p11 alloy steel pipe

    Thebiggest advantage ofp11alloy steel pipeis that it can be 100% recycled. It conforms to the national strategy of environmental protection, energy saving and resource conservation. The national policy encourages the expansion of high press.

  • How long is the life of a spiral steel pipe ?
    How long is the life of a spiral steel pipe ?

    Spiral steel pipe itself has no life limit, and the service life is mainly related to the operating environment and production process. Spiral steel pipe operating environment is relatively poor In order to extend the service life, the oute.

Get in touch

Our company covers an area of 80, 000 m2 with a total assets of 90 million Yuan. There are 360 staff members including 80 technicians in our company. .

We also establish an effective complete quality control system. In 2003, our company obtained the certificate of ISO9001 Quality System Authentification!