Heat Shrink Sleeve for Post Tensioning Duct Joint

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Heat Shrink Sleeve for Post Tensioning Duct Joint

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Heat Shrink Sleeve for Post Tensioning Duct Joint Specification

Locking Type
Adhesive seal and fusion with heat

Features
Waterproof, corrosion resistant, UV resistant, abrasion resistant, provides a tight and durable seal for post tensioning duct joints, easy to install with heat application, flexible adaptation to duct sizes.

Rated Temperature
-40C to +110C

Operating Temperature
-40C to +110C

Dielectiric Strength
15 kV/mm

Weight
Approx. 120-200g per sleeve (depends on size)

Tensile Strength
14 MPa

Insulation
Yes, electrical and moisture insulation

Install Type
Heat shrink application

Usage & Applications
Post-tensioning duct joint sealing, bridge construction, tunnels, highways, and concrete structure protection

Diameter
Ranges from 50 mm to 110 mm before shrinking

Product Type
Heat Shrink Sleeve for Post Tensioning Duct Joint

Length
500 mm, 750 mm, 1000 mm (custom lengths available)

Voltage
Up to 1 kV (as insulation barrier)

Insulation Material
Cross-linked polyolefin

Application
Sealing and protection of post-tensioning duct joints in civil construction and infrastructure projects

Jacket Material
Cross-linked polyolefin with adhesive lining

Storage Temperature
-10C to +40C

Jacket Color
Black

Dimension (L*W*H)
Varies with length/diameter: e.g. 500mm x 80mm x 3.0mm (before shrinking)

Material
Cross-linked polyolefin

Color
Black

Size
DN50, DN75, DN90, DN110 and custom sizes

Flame Retardancy
UL 94 V-0

Shrink Ratio
3:1

Environmental Compliance
RoHS compliant

Water Absorption
0.5% (24 hrs at 23C)

Minimum Shrink Temperature
120C

Shelf Life
24 months from manufacture date in original packaging

Packaging
Individual sleeve packaging with instruction leaflet

Adhesive Type
Thermoplastic hot-melt adhesive lining

Surface Hardness
Shore D 45

Maximum Continuous Operating Voltage
1000V

About Heat Shrink Sleeve for Post Tensioning Duct Joint

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.

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

Advanced Protection and Reliability

Our heat shrink sleeves offer outstanding protection against water, UV, abrasion, and corrosion, making them highly reliable for post-tensioning duct joints in bridges, tunnels, highways, and more. The thermoplastic adhesive lining creates a tight, durable seal that ensures structural longevity even in harsh outdoor environments.

User-Friendly Installation Process

With a straightforward heat shrink application, the sleeve shrinks uniformly and bonds effectively to duct surfaces. Installation is quick and efficient, aided by the adhesive fusion mechanism and a comprehensive instruction leaflet included in every individual packaging, making it easy for professionals to achieve a secure seal.

Safety and Compliance You Can Trust

Our product meets RoHS environmental standards, features a low water absorption rate, and delivers excellent electrical insulation up to 1 kV. Its flame retardant and robust physical properties ensure reliability and safety throughout its operational lifespan, with a shelf life of up to 24 months in original packaging.

FAQ's of Heat Shrink Sleeve for Post Tensioning Duct Joint:

Q: How do you install the heat shrink sleeve for post tensioning duct joints?

A: Installation is straightforward: Slide the sleeve over the duct joint, then apply heat evenly until the sleeve shrinks tightly and the adhesive lining fuses, forming a secure, watertight seal. The included instruction leaflet provides detailed guidance for optimal results.

Q: What are the advantages of using this heat shrink sleeve for post tensioning duct joints?

A: Key benefits include waterproofing, corrosion resistance, UV resistance, abrasion protection, and electrical and moisture insulation. The sleeve adapts to variable duct sizes while ensuring a tight, durable, and long-lasting seal, all with an easy installation process.

Q: When should I use this heat shrink sleeve in construction projects?

A: Use this sleeve whenever sealing and protecting duct joints in post-tensioning systems is critical-especially in bridge, tunnel, highway, and general concrete structure construction where durability and environmental resistance are essential.

Q: Where can this heat shrink sleeve be applied?

A: It is suitable for a wide range of civil construction and infrastructure projects, including bridge construction, tunnels, highways, and the protection of concrete structures. Its flexibility allows adaptation to various duct types and custom sizes as needed.

Q: What is the process for ensuring a reliable seal with this product?

A: For a reliable seal, make sure the duct surface is clean and dry, position the sleeve over the joint, and apply uniform heat (minimum 120C) until the sleeve fully contracts and the adhesive flows. This process guarantees tight fusion and a secure seal.

Q: What compliance and safety certifications does the sleeve hold?

A: The product is RoHS compliant, flame retardant per UL 94 V-0 standards, and provides excellent dielectric strength (15 kV/mm) for electrical safety, ensuring both environmental responsibility and operational safety.

Q: How long does the heat shrink sleeve last and how should it be stored?

A: The sleeve has a shelf life of 24 months when stored in its original packaging at temperatures between -10C and +40C. Proper storage ensures material integrity and optimal performance when used.

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