Heat Shrink Sleeve For Post Tensioning
Heat Shrink Coupler is a Tubing used for jointing the posttensioning ducts to ensure leak tightness of connections between two consecutive portion of duct.
These tubes are manufactured from high quality Cross-linked Polyolefin material. Hot melt adhesive lining provides 100% sealing according to IP 68 (Ingress Protection). Heat Shrink Couplers ensure a tight seal around the pre-stressing duct connections.
Features & Benefits
- Easy & Quick Installation. No special skill required.
- High resistance to Impact & Abrasion.
- Suitable for Wet and Dry underground conditions.
- Joint in-line with pipe.
- Superior elastomeric characteristics allows better conformance over irregular contours.
- High Shrink ratio (3:1) helps to reduce the stock requirements with few sizes covering greater pipe application range.
- Resistant to Heat, UV rays, Vibration, Sand-blasting & Harsh Industrial conditions.
Diagram
Selection Chart
| Code | D Min (mm) | d Max (mm) | T ±10% (mm) | Length/Pc. (mm) |
|---|---|---|---|---|
| GMW 70/22 | 70 | 22 | 2.7 | 300 |
| GMW 90/28 | 90 | 28 | 3.0 | 300 |
| GMW 105/30 | 105 | 30 | 3.0 | 300 |
| GMW 115/34 | 115 | 34 | 3.2 | 300 |
| GMW 130/36 | 130 | 36 | 3.2 | 300 |
| GMW 140/42 | 140 | 42 | 3.2 | 300 |
| GMW 160/50 | 160 | 50 | 3.3 | 300 |
| GMW 180/55 | 180 | 55 | 3.3 | 300 |
| GMW 200/60 | 200 | 60 | 3.5 | 300 |
| GMW 250/70 | 250 | 70 | 3.5 | 300 |
| GMW 320/90 | 320 | 90 | 3.5 | 300 |
| GMW 375/110 | 375 | 110 | 3.5 | 300 |
| GMW 425/125 | 425 | 125 | 3.5 | 300 |
| GMW 550/157 | 550 | 157 | 3.5 | 300 |
| GMW 680/200 | 680 | 200 | 3.5 | 300 |
| GMW 760/215 | 760 | 215 | 3.5 | 300 |
| GMW 863/250 | 863 | 250 | 3.5 | 300 |
Technical Specification
| Properties | Value | Standard |
|---|---|---|
| Physical | ||
| Tensile Strength | 12 MPa (min.) | ASTM D638 |
| Ultimate Elongation | 350% (min.) | ASTM D638 |
| Longitudinal Change | -10% (max.) | ASTM D2671 |
| Hardness | 45 ± 10 Shore D | ASTM D2240 |
| Water Absorption | 0.5% (max.) | ASTM D570 |
| Thermal | ||
| Accelerated Ageing (120°C for 500 hrs) | — | ASTM D2671 |
| Tensile Strength | 10 MPa (min.) | ASTM D638 |
| Ultimate Elongation | 300% (min.) | ASTM D638 |
| Low Temperature Flexibility (-40°C for 4 hrs) | No Cracking | ASTM D2671 |
| Heat Shock (250°C for 30 min) | No cracking or flowing | ESI 09-11 |
| Shrink Temperature | 125°C | IEC 216 |
| Continuous Temperature Limit | -40°C to +110°C | IEC 216 |
| Electrical | ||
| Dielectric Strength | 12 kV/mm (min.) | ASTM D149 |
| Volume Resistivity | 1 x 10¹⁴ Ohm.cm (min.) | ASTM D257 |
| Dielectric Constant | 5 (max.) | ASTM D150 |
Certificates
FAQs
1. What is a Heat Shrink Shroud?
A Heat Shrink Shroud is a protective sleeve made from cross-linked polymer material that shrinks when heat is applied. It provides insulation, sealing, and mechanical protection for cables, joints, and terminations.
2. How does a Heat Shrink Shroud work?
When heat is applied using a heat gun or torch, the shroud shrinks uniformly and tightly wraps around the cable or joint, creating a secure and sealed covering.
When heat is applied using a heat gun or torch, the shroud shrinks uniformly and tightly wraps around the cable or joint, creating a secure and sealed covering.
3. What material is Heat Shrink Shroud made of?
It is typically made from cross-linked polyolefin material, often containing carbon black for UV resistance and weather protection.
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