Introduction to 80℃ 3-Layer Heat Shrinkable Sleeve for Pipeline Joints
The 80℃ 3-layer heat shrinkable sleeve is an advanced solution designed for the corrosion protection of pipe field welded joints, particularly effective in environments where temperature fluctuations and moisture exposure are prevalent. This innovative product is primarily used in the oil and gas, water, and wastewater industries, where the integrity of pipeline systems is critical.
Features
The 3-layer construction of the heat shrinkable sleeve consists of an outer layer made from a durable polyethylene or polypropylene material, a middle adhesive layer that provides excellent bonding properties, and an inner layer that enhances the sleeve's resistance to corrosion and environmental factors. The sleeve is designed to shrink upon heating, creating a tight seal around the pipe joint, which effectively prevents moisture ingress and protects against corrosion. It can withstand temperatures up to 80℃, making it suitable for various applications where heat resistance is necessary.
Applications
These heat shrink sleeves are particularly useful for girth weld joints in buried steel pipelines, especially those coated with 3-layer polyethylene (3LPE), 3-layer polypropylene (3LPP), or fusion-bonded epoxy (FBE). They are ideal for use in harsh environments, including offshore installations and areas with high soil acidity. The heat shrinkable sleeves are also employed in the repair and maintenance of existing pipelines, providing a reliable solution for extending the lifespan of pipeline systems.
Installation
Installation of the 80℃ 3-layer heat shrinkable sleeve is straightforward. The process begins with surface preparation, where the pipe joint is cleaned to remove any contaminants. An epoxy adhesive is then applied to the prepared surface. The heat shrinkable sleeve is wrapped around the joint, and heat is applied using a heat gun or other heating devices. As the sleeve heats up, it shrinks tightly around the joint, ensuring a secure and waterproof seal. This method not only enhances the protective qualities of the sleeve but also ensures a long-lasting bond with the pipe surface.
In conclusion, the 80℃ 3-layer heat shrinkable sleeve is a vital component in modern pipeline protection strategies, offering robust features, versatile applications, and easy installation methods that contribute to the longevity and reliability of pipeline systems.
Technical Performance
Property | Test temp. | Unit | Requirement | Test result | Test method |
Thickness | — | mm | ≥ 0.85 × nominal value | 0.88 × nominal value | Annex A
ISO21809-3 |
Holiday detection at 5 kV/mm + 5 kV | — | — | no holiday | no holiday | Annex B
ISO21809-3 |
Impact resistance (holiday detection at 5 kV/mm 5 kV after recovery) | 20℃ | J/mm | ≥ 5 | 6.8 | Annex G
ISO21809-3 |
Indentation resistance (holiday detection at 5 kV/mm 5 kV after recovery)
Residual thickness | 50℃ | N/m㎡ | 1.0 | 1.0 | Annex H
ISO21809-3 |
— | mm | ≥ 0.6 | 1.26 |
Cathodic disbondment at 30 days | 23℃ | mm | ≤ 10.0 | 6.5 | Annex F
ISO21809-3 |
50℃ | mm | ≤15 | 10 |
Peel strength at 10 mm/min to pipe surface primed with epoxy and to plant coating | 23℃ | N/mm | ≥ 2.50 | 8.5 | Annex D
ISO21809-3 |
50℃ | N/mm | ≥ 0.20 | 0.46 |
Peel strength at 10 mm/min
to pipe surface and to plant coating | 23℃ | N/mm | ≥ 0.4 | 8.2 | Annex D
ISO21809-3 |
Peel strength at 10 mm/min
to pipe surface after 28-day
hot-water immersion test at Tmax limited as per Annex I | 23℃ | N/mm | ≥ 0.2 | 7.0 | Annex I
ISO21809-3 |
Peel strength at 10 mm/min
to plant coating after 28-day
hot-water immersion test at Tmax limited as per Annex I | 23℃ | N/mm | ≥ 0.4 | 7.5 | Annex I
ISO21809-3 |
Lap shear strength at 10 mm/min | 23℃ | N/m㎡ | ≥ 0.05 | 3.8 | Annex L
ISO21809-3 |
50℃ | N/m㎡ | ≥ 0.07 | 0.39 |
Thermal ageing resistance (aged at Tmax + 20 °C)
– Elongation at break (E100/E0)
– Peel strength to pipe surface (P100/P100) | 23℃ | E100/E0 | ≥ 0.75 | 0.89 | Annex N
ISO21809-3 |
23℃ | P100/P70 | ≥ 0.80 | 0.92 |
23℃ | A100/A70 | ≥ 0.80 | 0.88 |
Ordering Information |
Select sleeve width that will overlap onto the mill-applied coating by 2 inches( 50mm) minimum on each side of the weld joint. Take a 10% shrinkage during installation of sleeve width into account when calculating the minimum sleeve width. | Range for available dimension: |
Sleeve length | Length of PE shrink sleeves
The length should be calculated as the following formula:
L=π×D×1.07+120mm (when pipe OD ≤42inch) L=π×D×1.07( when pipe OD ＞42inch) |
Sleeve width | We can provide 450mm, 480mm, 500mm, 520mm and 550mm supplied PE shrink sleeves width. |
Sleeve thickness | We can provide 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm , 3.0mm and 3.2mm supplied PE shrink sleeves thickness. |
Primer thickness | There are two kinds of primer application way, wet film and dry film. We can provide 120um, 150um, 200um, 300um and 400um primer thickness. |
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