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Product Name

HDD Pipeline Reinforced Backing Heat Shrinkable Sleeve,Horizontal Directional Drilling Heat shrinkable sleeve、HDD Heat Shrink Coating System

Product Features

Highly resistant to shear and peel forces induced by soil and thermal movements.

It should offers abrasion and wear resistance at pull-through comparable to mill coatings.

Provision of appropriate wear cone which can protect leading edge of sleeve against pull-through forces.

Sleeve applied over wet epoxy---there are no curing or waiting times/formation of strong mechanical & chemical bonds.

Superior cathodic disbandment and hot water immersion resistance.

Pre-attached closure patch.

Low preheat requirements.

Shelf Life

24 Months

Package Specification

Cartons+Pallets

Thickness – Sleeve Layers, mm

ISO21809-3:2016 Annex B

3.06

3.07

3.06

3.06

3.07

3.06

Impact resistance (holiday detection at 5 kV/mm + 5 kV), at 23 °C, J/mm

ISO21809-3:2016 Annex D

7.5

7.7

7.7

7.9

8.1

8.3

Cathodic disbondment at 28 days

at 23 °C, mm

Tmax, limited to 95 °C, mm

ISO21809-3:2016 Annex G

4

7

3

8

4

7

3

8

3

7

4

8

Peel strength at 10 mm/min to pipe surface and to polyolefin plant coating after 100- day hot-water immersion test at Tmax limited as per Annex I, at 23 °C, P100/P0

ISO21809-3:2016 Annex I

ISO21809-3:2016 Annex H

0.87

0.86

0.87

0.88

0.87

0.86

Thermal ageing resistance (aged at Tmax + 20 °C), %

ISO21809-3:2016 Annex M

85

89

87

88

87

86

Bursting strengt hof rein-forced backing (B100/B70), at 23 °C

ISO21809-3:2016 Annex O

0.87

0.85

0.85

0.89

0.87

0.88

Oxidation induction time on the backing at 220 °C (intercept in the tangent method), min

ISO11357-6-2018

17

19

20

19

21

20

Installation Instructions

I. Construction tools: flame spray gun, pressure roller, wire brush, rag, etc.

II. Installation HSS steps:

1. Sandblasting and cleaning the joint part: draw the joint installation part at the joint, and remove the water and soil at the joint installation part.

2. Preheating and sanding: preheat the pipe wall at the joint installation position to about 70 ℃ and sanding along the circumference.

3. Apply epoxy primer

4. The HSS shall be used to cover the pipe, the two ends of the pipe to be connected shall be aligned horizontally, and the gap between the two sections shall be kept as small as possible. When the gap is greater than 15mm, the end face of the pipe shall be treated to minimize the gap.

5. Heat evenly along the circumference from the middle, make it shrink completely, and then extend to both ends for heating. When heating, the allowable heating temperature of the heat shrinkable zone shall not exceed 250 ℃, and pay attention to uniform use of fire. After all shrinkage, reheat the uneven surface to make it completely flat. After the whole heating, turn down the flame and reheat again to make the hot melt adhesive overflow fully.

6. During the heating process, the joint is rolled several times with the pressure roller, and the fusion lap joint is mainly rolled to eliminate bubbles.

III. Installation HDD steps:

1. The HDD shall be used to cover the pipe, the two ends of the pipe to be connected shall be aligned horizontally, and the gap between the two sections shall be kept as small as possible. When the gap is greater than 15mm, the end face of the pipe shall be treated to minimize the gap.

2. Heat evenly along the circumference from the middle, make it shrink completely, and then extend to both ends for heating. When heating, the allowable heating temperature of the heat shrinkable zone shall not exceed 250 ℃, and pay attention to uniform use of fire. After all shrinkage, reheat the uneven surface to make it completely flat. After the whole heating, turn down the flame and reheat again to make the hot melt adhesive overflow fully.

3. During the heating process, the joint is rolled several times with the pressure roller, and the fusion lap joint is mainly rolled to eliminate bubbles.

IV. Installation quality judgment:

1. The heat shrinkable belt shrinks evenly along the circumference, and the surface is smooth without wrinkles, bubbles, voids, scorching and cracking.

2. The adhesive layer at the edge of the heat shrinkable zone is fully melted and evenly overflowed.

VI. Note:

1. When the connected pipe needs to be moved, it should be moved after the joint is cooled to below 50 ℃, and the position with less stress at the joint should be kept as far as possible.

2. The heat shrinkable tape after installation shall be covered to avoid direct sunlight. When the temperature of the joint is too high, the cooling measures (such as watering, etc.) should be taken.

Installation Picture

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