Whats is the difference between Heat shrink tapes and Cold applied tapes?

Heat shrinkable tape, also known as anti-corrosion Heat Shrinkable Wrap-Around Sleeves of pipeline, is designed for joint coating of buried or overhead steel pipeline and reserved welding joint. It is used after connecting (welding) to form a pipeline. It is composed of a heat shrinkable tape and a fixing closure patch to form a tubular body, which is used by the coating method.Heat Shrink Sleeves structure:

The inner layer is two-components Epoxy Primer which coated on steel pipe;

Intermediate level is special hot melt adhesive ;

Outer layer is modified radiation crossing linking polyethylene backing.

2 PE heat shrink sleeves structure without epoxy primer.

Heat shrinkable split sleeve, suitable for 2PE (pressure sensitive adhesive) and 3PE (copolymer hot melt adhesive) coatings, and also for damage Φ Repair ≥ 300mm. Our company has accumulated many years of production technology experience. It is a professional manufacturer of pipe anti-corrosion heat shrinkable opening sleeve with various strengths in China.

The heat shrinkable tape is made of radiation crosslinked high-density polyethylene substrate and special sealing adhesive. It has the characteristics of excellent mechanical damage resistance, good sealing and long service life. The heat shrinkable opening sleeve is widely used in steel pipe network engineering in petroleum, natural gas, chemical industry, urban construction and other industries to provide a long-term excellent and reliable anti-corrosion protection system for the position where the pipeline needs to be repaired for anti-corrosion.

When install the heat shrink tapes and use torch to heat it , it will shrinkable .

Cold Applied Tape: Polyethylene is used as the base materials which are covered by the liquid butyl rubber film. Both of which are pressed and compounded with heat complex technology.
Characteristic:
1. Use butyl rubber as the major components on the adhesive film. Due to the butyl rubber has highly saturation at the molecular structure, and has extremely stability at the chemistry. Moreover, it performs great result in resistance to aging, sealing force, electrical insulation and resistance to high temperature. Therefore, cold applied tape is reliable for the pipeline anti-corrosion. The life of the tape is 40 years underground and underwater, dielectric strength more than 30 KV/MM, and the range of operation temperature is -30 Deg C to 75 Deg C
2. During the heat complex process. The film and adhesive melted together on the certain degree of heat, and increase the peel strength between the film and adhesive. As the result, peel strength is greater than 22 N/CM.
3. Customizing the thickness of tape in term of film and adhesive as you want. You can choose the range of the adhesive from 0.1mm to 1mm and the range of the film from 0.2mm to 1mm.
4. Ease of construction: as long as keeping the temperature of tape more than 50C, you can wrap directly to the pipeline under the operation temperature from -30 Deg C to 75 Deg C.