Polyethylene joint coating electric melting sleeve manufacturer

Polyethylene joint coating electric melting sleeve manufacturer

Heat shrink sleeve, also known as heat shrink joint patch, commonly known as heat shrink living sleeve, heat shrink opening sleeve, and pipe heat shrink wrapping sheet. Heat shrink tape is a coating sleeve designed for anti-corrosion of steel pipe welds with independent fixing sheets. The heat shrink tape is composed of radiation cross-linked polyolefin substrate and special sealing hot melt adhesive composite. It is a professional product for pipeline welding joint anti-corrosion

The construction process is as follows:
1. Ensure that the epoxy coating on the parts covered by the heat shrink tape at both ends of the weld seam is contaminated, remove rust from the surface of the steel pipe node, and gently polish the polyethylene coating covered by the heat shrink tape with a steel brush,
Make this part of the polyethylene coating have a certain roughness.
2. Use a clean cloth or dry air to blow away the attachments on the steel pipe and polyethylene coating.
3. Preheat the weld seam with a propane spray gun, ensuring that the steel pipe line is wider than the heat shrink zone, and the preheating temperature at the weld seam is 75 degrees Celsius.
4. When installing the heat shrink tape, select the end with the sealing sheet attached, remove the protective liner, and gently heat it up to overlap 150mm
5. Remove the remaining protective pads and wrap the remaining heat shrink tape around the joint. Loosely wrap the heat shrink tape around the pipeline, ensuring appropriate overlap size.
6. Gently heat the backing at the lower overlap and the adhesive at the upper overlap, then overlap the heat shrink tape and press the sealing sheet onto the overlap.
7. Gently heat the sealing sheet and pat it with a gloved hand, repeating this step from one end to the other. Use a roller to roll from the middle to both sides to smooth out the folds of the sealing sheet.
8. Use appropriate flame to heat the middle and surrounding areas, with a longer heating stroke.
During the thermal shrinkage process of the heat shrink belt, continue heating from the middle to one side until the shrinkage is complete.
10. When the adhesive overflows on both sides of the heat shrink tape, the shrinkage is completed, and then the surface of the heat shrink tape is continuously heated to ensure the connection.
11. When the heat shrink belt still has temperature and softness, use a roller to squeeze the heat shrink belt and remove any bubbles. If necessary, reheat it to remove any bubbles.

Polyethylene joint coating electric melting sleeve manufacturer

Electric fusion welding machine: This product is designed and developed specifically for the welding of high-density polyethylene polyurethane insulation pipes with electric fusion sleeves (belts). It has a high degree of automation, with automatic conversion when powered on at 220V/380V, easy to carry weight, durable and suitable for various construction environments. Hot melt sleeve: It is a special connecting pipe made by secondary processing and composite special electric heating mesh on high-quality PE sheet. Purpose: Mainly used for interface connection of thermal pipelines, oil pipelines, natural gas pipelines, and anti-corrosion and insulation pipelines. Features: High adhesive strength, good sealing performance, corrosion resistance, long service life, easy to use. Common product specifications for hot melt sleeves (can be customized according to customer requirements, specifications are not limited, outer sleeve diameter: DN200-1880mm)

Importance, point out the issues that should be considered when applying joint patching methods, including the correct selection of joint patching materials; ② Reasonable formulation and implementation of construction technology requirements; ③ Throughout the entire process, quality supervision is carried out, and professional production of electric heating melting sleeves is carried out. The product changes the traditional process and is formed on PE sheet by using special hot melt integrated equipment to melt and composite special nickel chromium alloy mesh belt in one go. Due to the selection of raw materials and a certain proportion of EVA hot melt adhesive for PE sheet, it is produced by co extrusion equipment and mixed and melted by a composite machine head, and then subjected to corona treatment. Therefore, a small amount of adhesive material can overflow around during welding melting. In addition, the nickel chromium alloy mesh has a fine texture, uniform arrangement, and high heat generation per unit time, which can be fused with PE pipelines more effectively and achieve good welding results.