Send Message
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Heat Shrink Wrap Around Sleeves
Related Products
What Are Heat Shrink Wrap Around Sleeves?
Heat shrink wrap around sleeves are specialized polyolefin-based protective coatings designed to seal and insulate pipe joints, valves, and flanges without requiring heat application during installation. Unlike traditional shrink tubes that must be slid over a pipe end, these wrap-around designs split longitudinally, allowing them to be closed around existing infrastructure—making them ideal for retrofit projects and difficult-to-access locations.
Manufactured by Sichuan Forever Radiation Technology Co., Ltd., a pioneer in radiation crosslinking materials backed by the China Academy of Engineering Physics (CAEP), these sleeves leverage advanced electron beam technology to ensure consistent molecular crosslinking. This results in superior mechanical strength, chemical resistance, and long-term durability for critical pipeline protection systems.
These sleeves are engineered to work in tandem with pressure-sensitive adhesives and epoxy primers, creating a multi-layer barrier against moisture, corrosion, and mechanical impact. They are widely used in oil & gas, water treatment, and telecommunications infrastructure where reliable joint protection is non-negotiable.
[Visual Reference: Cross-section of Wrap Around Sleeve Structure]
Quality Assurance & Manufacturing Excellence
National-Level Production Standards
As the birthplace of China's radiation crosslinking materials, our facility inherits technology from the Ninth Scientific Research Institute of CAEP. We utilize Russia's first accelerator to produce high-performance polyethylene crosslinked via electron beam irradiation. This process ensures uniform molecular bonding, resulting in sleeves with consistent shrink ratios and tensile strength across every batch.
Rigorous Testing Protocols
Every batch of heat shrink wrap around sleeves undergoes third-party inspection services to verify compliance with international standards. Key tests include:
- Adhesion Peel Strength: Ensures secure bonding to steel and PE surfaces.
- Dielectric Breakdown Voltage: Guarantees electrical insulation integrity.
- Water Penetration Test: Confirms 100% waterproof sealing under hydrostatic pressure.
- Cathodic Disbondment: Validates resistance to cathodic disbondment in harsh soil environments.
Certified Supply Chain
Backed by Sichuan Forever Holding Group, we maintain full traceability from raw material sourcing to final packaging. Our quality management system supports OEM requests and custom specifications for global distributors and EPC contractors.
How to Choose the Right Heat Shrink Sleeve System
Selecting the correct heat shrink wrap around sleeve system requires matching product specifications to your pipeline's operating environment, diameter, and coating requirements. A mismatch can lead to premature failure, costly repairs, or safety hazards.
1. Identify Your Coating Standard
Most pipelines use 3LPE (3-Layer Polyethylene) or 3LPP (3-Layer Polypropylene) coatings. Ensure your wrap sleeves are compatible with the factory-applied coating at joints. Our sleeves are engineered for seamless integration with standard 3LPE/3LPP systems, including those specified by ISO 21809 and DNV-RP-F103.
2. Evaluate Temperature & Chemical Exposure
For high-temperature pipelines (>70°C), select 3LPP heat shrinkable sleeves which offer higher thermal stability. For corrosive industrial zones or offshore applications, prioritize sleeves with enhanced acid/alkali resistance and thick adhesive layers.
3. Verify Installation Constraints
Wrap-around sleeves are ideal when space is limited or pipes cannot be slid into sleeves. Confirm that your team has access to proper installation tools (propane torches or hot air guns) and that surface preparation follows SSPC-SP10/NACE No. 2 standards for optimal adhesion.
Buyer Decision Checklist for Pipeline Protection
Use this checklist to evaluate suppliers and products before placing orders for heat shrink wrap around sleeves. Ensure every criterion is verified to minimize procurement risk.
Technical Compliance
Material: Radiation-crosslinked polyolefin
Shrink Ratio: 2:1 or 3:1 as required
Adhesive Thickness: ≥1.5mm molten state
Certifications: ISO 21809, DNV, SGS Report
Supplier Capability
Own Irradiation Facility (CAEP Heritage)
In-House R&D Lab
OEM/ODM Service Available
Third-Party Inspection Support
Logistics & Support
Lead Time: < 15 days for standard sizes
Packaging: Moisture-proof, corner-protected
Technical Documentation Included
Installation Tool Supply Option
Industry Applications & Use Cases
Oil & Gas Pipelines
Primary application for girth weld protection in transmission lines. Our 3LPE heat shrinkable sleeves provide robust cathodic disbondment resistance and mechanical protection against rock impingement and soil stress.
Water & Wastewater
Used to seal joints in large-diameter steel and ductile iron pipes. The waterproof end caps and wrap sleeves prevent groundwater ingress and protect internal linings from corrosion in aggressive soil conditions.
Telecommunications
Protects spliced cable joints in underground and submarine communications. The insulation properties and moisture barrier ensure signal integrity and prevent short circuits in humid environments.
HVDC Power Cables
High-voltage direct current cable joint insulation relies on our radiation-crosslinked materials for superior dielectric strength and long-term electrical performance under high electric stress.
Marine & Offshore
Specialized formulations resist saltwater immersion and UV degradation. Ideal for riser protection, subsea pipeline repair patches, and above-water structural steel coating touch-ups.
Industrial Repair
Rapid response solutions for damaged factory coatings. Our repair patch kits allow quick restoration of protective barriers on tanks, vessels, and exposed piping without shutdown delays.
Why Partner with Sichuan Forever?
Direct Manufacturer Advantage
By sourcing directly from Sichuan Forever Radiation Technology Co., Ltd., you eliminate intermediary markups. Our vertical integration—from raw polymer processing to electron beam irradiation and final packaging—ensures cost competitiveness without compromising quality.
Proven Technology Heritage
Our lineage from the China Academy of Engineering Physics (CAEP) provides a unique technological edge. We possess the expertise to solve complex coating challenges and develop custom solutions for demanding applications, a capability few competitors match.
Global Distribution Network
We support global partners with flexible MOQs, consolidated shipping options, and comprehensive technical documentation in English. Our team assists with specification writing, tender support, and on-site installation guidance to ensure project success.
Key Differentiators
1958
Heritage since CAEP founding
100%
In-house irradiation capacity
OEM
Custom branding & specs welcome
Frequently Asked Questions About Heat Shrink Sleeves
What is the difference between heat shrink wrap around sleeves and standard shrink tubes?
Standard shrink tubes must be slid over the end of a pipe before joining, making them unsuitable for already-installed pipelines or tight spaces. Heat shrink wrap around sleeves are split longitudinally and wrapped around the joint, then heated to shrink and seal. This makes them ideal for field repairs, girth welds, and irregular shapes like valves and flanges.
Do you provide installation tools and training?
Yes, we offer both automatic and manual installation tools, including propane torches, hot air guns, and surface preparation equipment. We also provide detailed installation manuals and video guides. For large projects, our technical team can offer on-site supervision and training to ensure proper application.
What is the typical lead time for bulk orders?
For standard sizes and specifications, lead time is typically 7-15 days after order confirmation. Custom sizes, colors, or OEM branding may require 15-25 days. We recommend planning ahead for large-scale projects to ensure timely delivery.
Can you supply sleeves for diameters larger than 1200mm?
Yes, our production capabilities cover a wide range of diameters, from small communication cables to large-diameter pipelines exceeding 1200mm. For very large diameters, we may recommend specific installation techniques or reinforced designs to ensure uniform shrinkage and adhesion.
Are your products certified for international projects?
Our products comply with international standards such as ISO 21809, DNV-RP-F103, and EN 10289. We can provide third-party test reports from SGS, BV, or other recognized inspection agencies upon request. Please specify your project's certification requirements during inquiry.
What is the shelf life of heat shrink sleeves?
When stored in a cool, dry place away from direct sunlight and heat sources, our heat shrink sleeves have a shelf life of up to 2 years. Proper packaging protects the adhesive layer from contamination and drying out. Always check the manufacture date on the packaging before installation.