HDPE Pre-Insulated Pipe Field Joint Heat Shrink Sleeve Durable & Efficient Insulation Solution
Product Description
PE 3-Layer Coating System for Welding Joint Closure Repair in 3LPE Steel Pipelines
Product Introduction
The Qingdao Huashida Radiation Cross-linked Polyethylene (PE) Heat Shrink Sleeve is an advanced anti-corrosion solution designed for the field application of 3-layer polyethylene (3LPE) coating systems. It is ideal for the protection and repair of welded joints in steel pipelines used in oil, gas, and water supply systems.
This product replicates the factory-applied 3LPE structure and performance in field conditions, ensuring durable and reliable protection for pipeline joints.
Structure and Composition
The heat shrink sleeve is composed of two primary layers:
Radiation Cross-linked Polyethylene (PE) Backing
Offers superior mechanical strength and protection from external damage.
Special Hot-Melt Adhesive Layer
Ensures strong adhesion to the steel surface and seamless bonding with the epoxy primer.
This system is applied in conjunction with a solvent-free two-component epoxy primer, forming a true 3-layer field-applied coating system.
Working Principle & Installation Process
Surface Preparation
Clean and prepare the steel surface at the weld joint area.
Epoxy Primer Application
Apply the solvent-free two-component epoxy primer onto the prepared pipe surface.
Sleeve Application
Wrap the heat shrink sleeve over the wet primer.
Heat Shrinking
Apply heat to shrink the sleeve tightly around the joint. The adhesive melts and flows, filling surface imperfections and bonding the sleeve firmly to the pipe.
Curing and Protection
As the epoxy cures, it creates strong chemical and mechanical bonds. The outer PE layer forms a solid protective barrier against moisture and mechanical damage.
Application fields
Application Areas
- Field joint corrosion protection for oil and gas pipelines
Field joint corrosion protection for water pipelines
Repair and maintenance of factory-applied 3LPE coatings
Key Features:
- Material: High-quality PE
- Ensures secure heat shrink sealing for pre-insulated steel pipe field joints
- Available in without treatment or customized options
- Standard black, with customized alternatives upon request
- Easy installation using a gas gun
- 110-2000mmto fit various pipeline dimensions
- Standard package for safe transport
Application: Ideal for insulating welded joints in heating pipelines and crude oil pipelines, the HDPE heat shrink casing provides a tight seal when heated, forming a seamless bond with the outer protective pipe. After shrinking, polyurethane foam is injected for complete thermal insulation.
High production capacity (2000 sets/day)
- Reliable performance
Ensure long-lasting pipeline insulation with HSD heat shrink casing - the smart choice for secure and efficient field joint sealing!
Heat shrinkable sleeve for Thermo Insulated Pipe
COMPARISIONS
Product Parameters
TECHNICAL PARAMETERS
PE Backing Layer
| Test Item | Unit | Requirement | Result | Test Method |
| Tensile Strength | MPa | ≥17 | 19.47 | ASTM D638 |
| Elongation | % | ≥400 | 626 | ASTM D638 |
| Vicat Softening Point | ºC | ≥90 | 92 | ASTM D1525 |
| Brittleness Temperature | ºC | < -65 | < -65 | ASTM D2671C |
| Dielectric Strength | MV/m | ≥25 | 33.13 | ASTM D149 |
| Volume Resistivity | Ω·m | ≥1×10¹³ | 1.1×10¹³ | ASTM D257 |
| Environmental Stress Crack Resistance | h | ≥1000 | >1000 | GB/T 1842 |
Chemical Resistance
| Chemical | Test Item | Requirement | Result |
| 10% HCl | Tensile Strength | ≥85% | 104.9 MPa |
| Elongation | ≥85% | 96.3% |
| 10% NaOH | Tensile Strength | ≥85% | 102.1 MPa |
| Elongation | ≥85% | 95.6% |
| 10% NaCl | Tensile Strength | ≥85% | 108.3 MPa |
| Elongation | ≥85% | 94.1% |
Thermal Aging (150ºC, 168h)
| Test Item | Requirement | Result |
| Tensile Strength | ≥14 MPa | 20.7 MPa |
| Elongation | ≥300% | 630% |
Packaging & Shipping
Adhesive Layer
| Test Item | Unit | Requirement | Result | Test Method |
| Softening Point | ºC | ≥90 | 90.1 | ASTM E28 |
| Brittleness Temperature | ºC | < -15 | < -15 | ASTM D2671C |
| Lap Shear Strength | MPa | ≥1.0 | 1.5 | ASTM D1002 |
| Peel Strength (23±2ºC) | N/cm | ≥70 | Steel: 145.6
Primer: 205.9
PE Layer: 190.0 | ASTM D1000 |
Epoxy Primer
| Test Item | Requirement | Result | Method |
| Shear Strength of Cured Primer | ≥5.0 MPa | 12 MPa | SY/T0041 |
Our Advantages
Compliance Standards
This product complies with major national and international standards, including:
GB/T 23257-2009
SY/T 4054-2003
EN 12068
DIN 30672
GOST R51164-98
Product Forms & Ordering Information
A complete product set includes:
Heat shrink sleeve
Closure patch
Individually packed epoxy primer
Maximum Operating Temperature: 60ºC
Available formats:
Pre-cut sleeve with separate closure patch
Tubular sleeve
Roll tape (closure patch ordered separately)
Pre-Cut Sleeve Specifications (Customizable)
| Pipe Size (mm) | Sleeve Length (mm) | Patch Length (mm) | Patch Width (mm) |
| Φ159 × 500 | 670 | 500 | 80 |
| Φ219 × 500 | 860 | 500 | 100 |
| Φ273 × 500 | 1000 | 500 | 100 |
| Φ325 × 500 | 1200 | 500 | 100 |
| Φ355 × 500 | 1300 | 500 | 100 |
| Φ406 × 500 | 1460 | 500 | 120 |
| Φ508 × 500 | 1800 | 500 | 120 |
| Φ610 × 500 | 2170 | 500 | 120 |
| Φ711 × 500 | 2500 | 500 | 150 |
| Φ813 × 500 | 2880 | 500 | 150 |
| Φ1016 × 500 | 3480 | 500 | 150 |
| Φ1219 × 500 | 4120 | 500 | 200 |
| Φ1420 × 500 | 4780 | 500 | 200 |
Roll Tape Specifications (Customizable)
| Width (mm) | Standard Length | Thickness |
| 100-600 | 5m, 10m, 15m, 20m, 30m per roll | PE Layer: 1.2 mm
Adhesive Layer: 0.8 mm |
Company Profile
Why Choose HUASHIDA?
20+ Years of Manufacturing Experience
Exported to Global Markets
Trusted Quality and International Reputation
Participation in Major Industry Exhibitions
Modern Production Facilities
Professional Technical Team
Detailed Photos
