polyurethane Heating The Conduit Produced by insulation manufacturer
polyurethane Thermal insulation pipe Main performance indicators of
1. Inside Steel pipe : Outer diameter ≤ 159mm, seamless steel pipe, steel grade 20. Outer diameter ≥ 219mm, spiral seam double submerged arc welded steel pipe, steel grade Q235-B.
2. Polyurethane foam insulation layer and external protective sleeve.
3. Insulation pipe: axial shear strength ≥
Features of polyurethane insulation pipe
Polyurethane insulation pipe has the good characteristics of light volume weight, high strength, heat insulation, sound insulation, flame retardancy, cold resistance, corrosion prevention, non water absorption, simple and fast construction, and has become the industrial ministry of construction, transportation, petroleum, chemical, power, refrigeration, etc door It is an indispensable material for heat insulation, waterproof and leak sealing.
Low thermal conductivity:
The thermal conductivity of polyurethane foam is low in thermal insulation materials, so the heat loss of materials can be reduced to a lower limit.
Waterproof, anti-corrosion and aging resistance:
Because the closed cell rate of polyurethane foam is more than 92%, polyurethane foam can not only be used as the insulation layer of directly buried pipelines, but also effectively prevent water, moisture and other corrosive liquids and gases from penetrating, preventing the growth and development of microorganisms.
Polyurethane heat supply pipe insulation manufacturer
The polyurethane insulation pipe is divided into three layers from the inside to the outside:
Inner layer: the working steel pipe layer generally selects seamless steel pipe, spiral steel pipe and straight seam steel pipe according to the design and customer requirements. After the steel pipe surface is treated by advanced shot blasting, the steel pipe rust removal grade can reach Sa2 in GB8923-1988 standard, and the surface roughness can reach R=12.5 μ m in GB6060.5-88 standard.
Middle layer: polyurethane insulation 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, which is commonly known as "pipe in pipe foaming".
Outer layer: high-density polyethylene protective layer: prefabricated into black or colored polyethylene plastic pipes with certain wall thickness. Its function is to protect the polyurethane insulation layer from mechanical hard objects, and to prevent corrosion and water.
Polyurethane heat supply pipe insulation manufacturer
Polyurethane insulation pipe - common problems and solutions in construction:
The polyurethane insulation pipe starts slowly, which usually occurs in autumn and winter or in the morning, because the temperature suddenly drops or the temperature is low. The problem can be solved by raising the ambient temperature and black material temperature. Generally, raise the temperature of black material to 30-60 ℃ and the ambient temperature to 20-30 ℃.
The polyurethane insulation pipe has a fast starting speed. This phenomenon usually occurs in spring and summer or at noon, because the temperature suddenly rises and the temperature is too high. The black material can be cooled with cold water or placed outdoors at night for natural cooling to avoid direct sun exposure.
The polyurethane insulation pipe has low foam strength and soft foam, which is caused by the proportion of black and white materials. Properly increase the proportion of black materials (1:1-1.05). Be careful not to make the proportion of black materials too large, otherwise the foam will become brittle and affect the foam performance.
