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Pipeline / Corrosion Protection Products

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.
SELECTION CHART

All dimensions are in mm

  • 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 (N/mm2) (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℃ for 500 hrs)
  • ASTM D2671
  • Tensile Strength
  • 10 Mpa (N/mm2 ) (min.)
  • ASTM D638
  • Ultimate Elongation
  • 300 % (min.)
  • ASTM D638
  • Low Temperature Flexibility
  • No Cracking
  • ASTM D2671
  • (-40℃ for 4 hrs.)
  •  
  •  
  • Heat Shock (250℃ for 30 min.)
  • No cracking or flowing
  • ESI 09-11
  • Shrink Tempera ture
  • 125℃
  • IEC 216
  • Continuous Temperature Limit
  • -40 to +110℃
  • 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

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