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3LPP (Three Layer Polypropylene) heat shrink wraparound sleeves are commonly used in the pipeline industry for corrosion protection and joint coating. These sleeves provide a robust, long-lasting solution to protect pipeline joints, fittings, and other components from corrosion, mechanical damage, and environmental factors. Here’s an overview of 3LPP heat shrink wraparound sleeves:

Key Features:
1. Material Composition:
Outer Layer: Polypropylene (PP), which provides excellent chemical resistance and UV protection.
Middle Layer: Adhesive or mastic, which ensures a strong bond between the sleeve and the pipe surface.
Inner Layer: Meltable adhesive, which melts during the heat application process to create a watertight seal.

2. Heat Shrinkable:
The sleeves are designed to shrink when heated, conforming tightly to the pipe surface and creating a seamless, protective barrier.

3. **Corrosion Protection**:
- Provides a high level of protection against corrosion, even in harsh environments.
- Resistant to chemicals, moisture, and UV radiation.
4. Mechanical Protection:
- Offers good resistance to impact and abrasion, protecting the underlying pipe from mechanical damage.
5. Ease of Installation:
Can be installed quickly and easily with minimal training.
Typically involves cleaning the pipe surface, applying the sleeve, and heating it to activate the adhesive.
6. Temperature Resistance:
Capable of withstanding a wide range of temperatures, making them suitable for various applications and environments.
7. Longevity:
Designed for long-term use, providing reliable protection over many years.
Applications:
Pipeline Joints: Used to cover and protect weld seams and other joints in pipelines.
Fittings and Valves: Can be applied to fittings, valves, and other pipeline components to ensure complete protection.
Repairs and Maintenance: Ideal for repairing damaged sections of existing pipeline coatings.