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Hengxiang News
— Product Selection —
  • Main codes and regulations to be followed in cold insulation design

    GB/T4272-2008 …………………………General rules of insulation technology for equipment and piping

    GB/T8175-2008 …………………………Guideline for design of insulation for equipment and piping

    GB/T8174-2008 …………………Testing and Evaluation of Thermal Insulation Effect of Equipment and Pipes

    GBJ126-89 …………………Code for Construction and Acceptance of Thermal Insulation Works for Industrial Equipment and Pipelines


  • The basic law of the selection of the thickness of cold insulation layer

    1. The greater the relative temperature of the environment, the thicker the cold insulation layer.
    2. The lower the temperature of the medium, the thicker the cold insulation layer.
    3. The higher the environmental humidity, the thicker the cold insulation layer.
    4. The larger the inner diameter of the pipeline, the thicker the cold insulation layer.
    5.The smaller the wet resistance factor of the cold insulation material, the thinner the cold insulation layer.
    6.The greater the wet resistance factor of the cold insulation material, the thinner the cold insulation layer.
    7.The greater the surface coefficient of the cold insulation material, the thinner the cold insulation layer.


  • Typical conditions for use

    1, central air conditioning chilled water supply system T=7℃ 2, central air conditioning chilled water backwater system T=12℃ 3, central air conditioning condensed water system T=18℃ 4, central air conditioning air supply system T=14℃ 5, central air conditioning host refrigeration medium low temperature system 6, refrigeration refrigeration system T=0℃ - 40℃


  • Suggested value of the thickness of air supply pipe to protect against cold and condensation

    • The air system of central air conditioning is divided into fresh air, exhaust air and return air. The parts that need to be insulated only refer to the air supply pipe and return air pipe. The temperature of the air medium sent back by the central air conditioner is generally not higher than 14℃, and its value is lower than the dew point temperature of the air conditioner. In order to prevent condensation, a cold insulation layer must be laid on the air duct. Hengxiang FUNOS sheet is the most suitable cold insulation material for the air supply and return pipes of central air conditioning.


  • Computational formula

  • Methods for calculating the volume of materials
    Plate: V = L x W xδm3
    L -- length (m) W -- width (m) δ -- thickness (m)
    Pipelien:V = (D + δ) x δ x 3.142 x L m3
    D -- inner diameter of insulation pipe (m) δ -- wall thickness of insulation pipe (m) L -- length of insulation pipe (m)

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