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Heat Shrink Sleeve for Post Tensioning Duct Joint

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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.
  • Customized dimensions, length & colour available.
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Technical Specification
PROPERTIES VALUE STANDARD
Physical    
Tensile Strength 20 Mpa (N/mm 2) (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 (1200C for 500 hrs) ASTM D2671
Tensile Strength 14 Mpa (N/mm2 ) (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 1250C IEC 216
Continuous Temperature Limit -40 to +1100C 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
Selection Chart
  • Code
     
  • D min
    (mm)
  • d max
    (mm)
  • T±10%
    (mm)
  • Length/Pc.
    (mm)
  • GCMW 70/22
  • 70
  • 22
  • 2.7
  • 300
  • GCMW 90/28
  • 90
  • 28
  • 3.0
  • 300
  • GCMW 105/30
  • 105
  • 30
  • 3.0
  • 300
  • GCMW 115/34
  • 115
  • 34
  • 3.2
  • 300
  • GCMW 130/36
  • 130
  • 36
  • 3.2
  • 300
  • GCMW 140/42
  • 140
  • 42
  • 3.2
  • 300
  • GCMW 160/50
  • 160
  • 50
  • 3.3
  • 300
  • GCMW 180/55
  • 180
  • 55
  • 3.3
  • 300
  • GCMW 200/60
  • 200
  • 60
  • 3.5
  • 300
  • GCMW 250/70
  • 250
  • 70
  • 3.5
  • 300
  • GCMW 320/90
  • 320
  • 90
  • 3.5
  • 300
  • GCMW 375/110
  • 375
  • 110
  • 3.5
  • 300
  • GCMW 425/125
  • 425
  • 125
  • 3.5
  • 300
  • GCMW 550/157
  • 550
  • 157
  • 3.5
  • 300
  • GCMW 680/200
  • 680
  • 200
  • 3.5
  • 300
  • GCMW 760/215
  • 760
  • 215
  • 3.5
  • 300
  • GCMW 863/250
  • 863
  • 250
  • 3.5
  • 300

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