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Construction Scheme of Rubber-Plastic Insulation for Galvanized Steel Air Duct

Construction Scheme of Rubber-Plastic Insulation for Galvanized Steel Air Duct


Construction Scheme of Rubber-Plastic Insulation for Galvanized Steel Air Duct

Using rubber-plastic insulation, the construction is simple, the appearance is beautiful, the process is simple, the construction cost is effectively reduced, and the insulation effect is good. It is very popular with construction companies and has been widely used in the construction of ventilation and air conditioning projects. However, the conventional air duct rubber-plastic insulation interface has many seams and is easy to crack, which affects the insulation effect and appearance effect.

After continuous exploration, the "Construction Method for Rubber and Plastic Insulation of Galvanized Steel Air Duct" was summed up. This construction method effectively solves many disadvantages of poor thermal insulation effect, cracked interface, and many seams that affect the thermal insulation effect by improving the blanking method of the rubber-plastic thermal insulation board and optimizing the bonding method. It is ensured that the side elevation of each insulation pipe section cannot see the seam, which further improves the insulation effect and the overall appearance effect.

The construction method is advanced in technology, easy to operate, suitable for popularization, and has obvious social and economic benefits.

Construction method features:

1. Advanced technology

This construction method improves the blanking method of rubber and plastic insulation boards, and the blanking of insulation boards is carried out as a whole. The four-corner flanging is cut and docked at 45° to ensure that the vertical and horizontal planes are at right angles, and that the side elevations are seamless. For irregular parts such as offset shape and right-angle elbows, the four sides are pasted separately, and the side elevations are pressed against the upper and lower bottom surfaces. Significantly improved the overall look and feel effect of air duct insulation, and the insulation effect was further strengthened.

2. Excellent quality

The construction process of this construction method is simple, saves materials, and the overall appearance effect is good. Compared with the conventional air duct insulation construction process, the insulation quality is significantly improved.

3. Significant economic benefits

Compared with the conventional galvanized steel air duct insulation construction, this construction method saves the loss of rubber and plastic plates. Standard section construction is used to reduce construction costs, significantly enhance the insulation effect, reduce the operating cost of air-conditioning units, and save energy.


Scope of application: This construction method is suitable for rubber and plastic insulation construction of rectangular metal air ducts in various types of air-conditioning and ventilation systems.

Process principle:

This construction method is formed by improving the rubber and plastic insulation of the traditional galvanized steel air duct. The core is to improve the cutting method of rubber and plastic insulation boards. The four sides of the air duct are all cut from the whole board, and the four corners are cut and docked at 45° to ensure that the four sides of the insulation layer are at right angles and reduce the bonding seam. Calculate the loft size according to the side length of the air duct and the thickness of the rubber and plastic sheet. Use a steel ruler or a steel tape measure to measure on the plate according to the calculated lofting size, and draw a V-shaped groove line and a 45-degree slope line on the plate with a ruler and a paintbrush. Reduce the number of seams and enhance the insulation effect of the air duct.

The paper cutter is required to tilt left and right 45° when chamfering the corner, so that the cut "V"-shaped notch is 90°, which is convenient for folding into a right angle. When cutting, the tool should be close to the ruler to ensure a straight cut and prevent cutting size errors.

Galvanized Steel Air Duct


Construction preparation:

1. The direction, coordinates and elevation of the air ducts of each system are installed accurately. Air duct leakage and light leakage detection tests are completed and meet the requirements.

2. Prepare the blanking list according to the model of the system air duct.

3. The technicians shall make a technical disclosure to the construction personnel, clarify the size and requirements of the thermal insulation blanking material, and make a record of the work instructions.

4. Prepare the construction plan of the on-site processing operation platform to ensure that the construction conditions meet the plan implementation.

Wipe and clean the surface of the air duct:

Use rags, paint brushes and other tools to clean up the dust or putty and other attachments on the surface of the air duct to ensure that the surface of the air duct is clean and free of debris, and will not affect the surface coating.

According to the size of the air duct, cut the insulation board:

The blanking of the insulation board is divided into straight pipe sections, elbows, variable diameter pipes and damper parts. According to the specifications of the air duct, draw a V-shaped groove line and a 45-degree slope line on the plate. The four corners of the air duct are cut and connected at a 45-degree angle to ensure that the bottom or top of the air duct is only An adhesive seam appears.

Brushing glue on the surface of the air duct and the plate:

Insulation glue should be evenly applied on the outer surface of air ducts, components or equipment, without gaps or omissions. Brush the glue in the order of brushing the insulation material first, then brushing the surface of the air duct, and the glue film is required to be even and free of flow.

Rubber and plastic board paste:

After the glue is left to stand for 2 minutes to initially set, first paste the top plate and the rubber and plastic plates on both sides, and press repeatedly with a clapper to ensure that the insulation material is tightly bonded to the air duct, components or equipment. Then paste the bottom insulation board. For irregular parts such as right-angle elbows and B-shaped bends, the four sides can be pasted separately, and the side elevations can be pressed against the upper and lower bottom surfaces.

Flange insulation:

For the flange connection of two air ducts, add a belt to keep warm. The width of the belt should be 100mm, and it should be firmly pasted and pressed flat.

Inspection and acceptance:

After the rubber-plastic board is pasted, check the flatness with a level ruler, and locally press the parts that exceed the deviation range to ensure the flatness of the surface. After the rubber and plastic board is pasted and repaired, it will be reported to the supervisory unit for acceptance after self-inspection by the project department.

Galvanized Steel Air Duct - 1

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