Radiation Cross-Linked PE Heat Shrink Sleeve for Pre-Insulated Pipe Girth Weld Joint
Our high-performance radiation cross-linked PE heat shrink sleeve is a professional pre-insulated pipe girth weld joint protection material exclusively developed for sealing and anti-corrosion protection of district heating pre-insulated pipe joints, chilled water distribution pipeline joints, and PU foam insulated pipeline girth weld connections - the standard field joint coating solution for buried pre-insulated pipe systems worldwide.
This pre-insulated pipe joint heat shrink sleeve adopts premium two-layer composite construction: radiation cross-linked polyethylene backing (tensile strength 19.47MPa, elongation 626%) matched with high-adhesion imported hot melt adhesive (peel strength 145.6N/cm to steel) - together forming an integrated, seamless protective barrier that maintains the thermal insulation integrity and anti-corrosion performance of every pre-insulated pipe girth weld joint to the same standard as the factory-manufactured pipe sections.
For complete long-term underground protection, this radiation cross-linked PE heat shrink sleeve must be used with a supporting non-solvent two-component epoxy primer - together forming a continuous, gap-free anti-corrosion and waterproofing system at every district heating pre-insulated pipe girth weld connection, eliminating the primary failure point of buried pre-insulated pipeline networks.
Available in three configurable supply styles with thickness options from 1.2mm to 2.5mm and widths from 100mm to 900mm - covering all pre-insulated pipe, district heating, and municipal pipeline girth weld joint protection specifications.
Key Characteristics
Purpose-Built for Pre-Insulated Pipe Girth Weld Joint Sealing
Specifically engineered for the unique demands of pre-insulated pipe girth weld joints - where the sleeve must simultaneously seal against groundwater ingress, maintain polyurethane foam thermal insulation integrity, and provide long-term anti-corrosion protection to the exposed steel carrier pipe at every joint connection.
Fast & Simple On-Site Pre-Insulated Pipe Joint Installation
Supports easy heating-only on-site installation - no special tools, no surface grinding, no complex equipment required. When heated by standard propane torch, the radiation cross-linked PE outer layer shrinks uniformly around the pre-insulated pipe joint diameter while the inner hot melt adhesive melts evenly.
Factory-Grade Pre-Insulated Pipe Joint Protection Standard
Combining this radiation cross-linked PE heat shrink sleeve with non-solvent two-component epoxy primer creates a continuous, solid, gap-free protective barrier at every pre-insulated pipe girth weld joint - maintaining the same thermal insulation and anti-corrosion performance standard as the factory-manufactured district heating pre-insulated pipe sections.
Core Product Benefits
- Pre-Insulated Pipe Girth Weld Waterproofing: Permanently seals district heating and chilled water pre-insulated pipe joints against groundwater ingress
- Outstanding Chemical Anti-Corrosion Resistance: Effectively resists erosion from 10% HCl, NaOH, NaCl, and all harsh underground chemical media
- Extreme Temperature Range Performance: Vicat softening point ≥90°C; brittleness temperature <-65°C - reliably serving buried district heating pre-insulated pipe joint protection
- Superior Electrical Insulation: Dielectric strength ≥25MV/m; volume resistivity ≥1*10¹³Ω.m - maintaining full cathodic protection system compatibility
- Long-Term Thermal Aging Resistance: After 150°C * 168h thermal aging - tensile strength retention ≥14MPa, elongation retention ≥300%
- Universal Pre-Insulated Pipe Joint Solution: Compatible with black and yellow jacket HDPE pre-insulated pipes, PU foam insulated steel pipes, and all standard district heating pipeline girth weld joint connection configurations
Product Parameters
Features:
- Fast uniform shrinkage speed for high-efficiency pre-insulated pipe girth weld joint field construction
- Superior fully sealed waterproof performance blocking groundwater penetration at district heating pre-insulated pipe joints
- Premium long-term anti-corrosion and thermal insulation protection consistent with factory pre-insulated pipe coating standard
- Ultra-long buried service life for permanent district heating pipeline girth weld joint protection
- Pure virgin PE raw material and imported hot melt adhesive - stable, consistent batch quality
Technical Parameters - Back Material:
| NO |
Test Item |
Unit |
Performance |
Test Result |
Test Method |
| 1 |
Tensile Strength |
MPa |
≥17 |
19.47 |
ASTM D638 |
| 2 |
Elongation |
% |
≥400 |
626 |
ASTM D638 |
| 3 |
Vicat Softening Point |
ºC |
≥90 |
92 |
ASTM D1525 |
| 4 |
Brittleness Temperature |
ºC |
<-65 |
<-65 |
ASTM D2671C |
| 5 |
Dielectric Strength |
MV/m |
≥25 |
33.13 |
ASTM D149 |
| 6 |
Volume Resistivity |
Ω.m |
≥1*10¹³ |
1.1*10¹³ |
ASTM D257 |
| 7 |
Environment Stress Crack |
h |
≥1000 |
>1000 |
GB/T1842 |
Technical Parameters - Adhesive:
| NO. |
Test Item |
Unit |
Performance |
Test Result |
Test Method |
| 1 |
Softening Point |
ºC |
≥90 |
90.1 |
ASTM E28 |
| 2 |
Brittleness Temperature |
ºC |
<-15 |
<-15 |
ASTM D2671C |
| 3 |
Lap Shear |
MPa |
≥1.0 |
1.5 |
ASTM D1002 |
| 4 |
Peel Strength (23±2ºC) |
N/cm |
≥70 |
145.6 |
ASTM D1000 |
Ordering Information
We supply three configurable styles of radiation cross-linked PE heat shrink sleeve for pre-insulated pipe girth weld joint protection:
- Pre-cut heat shrink sleeve with separate closure patch - standard configuration for most district heating and chilled water pre-insulated pipe girth weld joint applications
- Pre-cut heat shrink sleeve with pre-attached integrated closure patch - streamlined single-component installation for faster pre-insulated pipe field joint construction
- Continuous heat shrink sleeve roll tape (closure patch ordered separately) - for high-volume district heating pipeline pre-insulated pipe girth weld joint projects requiring customized cut lengths on site
Available Specifications:
- Thickness: 1.2mm, 1.6mm, 1.8mm, 2.0mm, 2.5mm
- Width: 100mm, 200mm, 300mm, 500mm, 600mm, 900mm
- Roll length: 30m or 50m per roll
- Custom dimensions available for large-volume pre-insulated pipe girth weld joint projects
Qingdao Huashida independently designs and manufactures full sets of radiation cross-linked PE heat shrink sleeve production line equipment - available as a complete turnkey package alongside finished sleeves for pre-insulated pipe girth weld joint protection.
Customer Cases
Company Profile
Qingdao Huashida Machinery Co., Ltd. is a professional manufacturer with 21 years of experience specializing in pre-insulated pipe girth weld joint protection materials - including radiation cross-linked PE heat shrink sleeves for district heating and chilled water pipelines, electro-fusion weldable joint sleeves, and PE cold applied anti-corrosion tape.
Our main products include:
- Radiation Cross-Linked PE Heat Shrink Sleeves - for pre-insulated pipe girth weld joints, oil and gas pipeline field joint coating, and drainage pipeline joint protection
- HDPE jacket pipe pre-insulated pipe production line (110-2200mm, district heating and chilled water)
- Rigid PUR spray PE wrapping pre-insulated pipe production line (508-1620mm)
- Flexible pre-insulated pipe (PERT) production line
- Steel pipe FBE/2LPE/3LPE anti-corrosion coating lines (36-4200mm)
- Turnkey cold applied PE anti-corrosion tape production lines
- PE pressure pipe/water gas supply pipe production line
- Pipeline anti-corrosion materials: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun (extruder), PE/PP welding rod
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