400mm diameter polyethylene heat shrink tubing is a specially designed large-diameter heat shrink sleeve made of high-quality polyethylene material. Its main characteristic is uniform radial shrinkage upon heating, typically reaching 50%, allowing it to tightly wrap around oversized objects, forming a robust, continuous, and sealed insulating protective layer.

Due to its large diameter, it belongs to the category of special heat shrink tubing and is mainly used in large-scale infrastructure, industrial, energy, and marine engineering fields.

400mm diameter polyethylene heat shrink tubing possesses excellent electrical insulation, chemical corrosion resistance, superior toughness, and low cost. The inner wall can be coated with hot melt adhesive. Upon heating, the adhesive layer melts and fills all gaps on the surface of the covered object, achieving excellent waterproof, moisture-proof, and airtight effects.

Advantage

400mm diameter polyethylene heat shrink tubing can handle pipes, cable joints, structural components, etc. with a diameter of 400mm and above, solving the problem that conventional heat shrink tubing cannot cover.

Excellent protective performance:Electrical insulation: Provides excellent insulation to prevent short circuits and leakage.Mechanical protection: Enhanced resistance to abrasion and impact protects internal components.Environmental sealing: If adhesive, completely isolates against moisture, dust, and corrosive gases.Easy installation: Memory effect: Shrinks upon heating, requiring no special tools

Wide adaptability: Can wrap irregularly shaped or sized joints.Durable and reliable: Cross-linked polyethylene has excellent anti-aging properties and a long service life.

Typical application fields

Electric power energy:Insulation and waterproof sealing of intermediate joints and terminations of high-voltage power cables.

Protection of connection points of large equipment in substations.

Bundling and protection of cable bundles inside wind turbine towers.

Petrochemical and marine engineering:

Anti-corrosion protection of submarine pipelines (splash zones, joints).

Anti-corrosion and repair of welds in land-based oil, gas, and water supply pipelines.

Anti-corrosion protection of steel pipe piles at docks.

Construction engineering and infrastructure:

Anti-corrosion protection of large steel structures (such as bridge anchor cables, truss joints).

Anti-corrosion of reinforcing bars or embedded parts in concrete structures.

Waterproof protection boxes and external enhanced sealing for large communication trunk optical cable joints.
The 400mm large-diameter polyethylene heat shrink tube is an efficient and reliable solution for addressing the challenges of protection and sealing in large industrial facilities. By combining the excellent properties of polyethylene material with the convenience of heat shrink technology, it provides an integrated and long-lasting "protective coat" for cables, pipelines, and steel structures, ensuring the safety and long-term stable operation of critical infrastructure in harsh environments.