OEM China Suppliers Factory for PP Heat Shrink Sleeve (Wraparound-Type) Field Joint System for Oil & Gas Pipelines Manufacturers, Factory

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Introducing the FRDP-PP high temperature heat shrink sleeve, specifically designed for the oil and gas pipeline field joint system in China. This wraparound type heat shrinkable sleeve (HSS) comes with a separate closure patch, making it ideal for newly constructed buried steel pipelines and thermal preinsulated pipelines.

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Our PP heat shrink sleeve (wraparound-type) coating system boasts exceptional properties, making it a top choice among suppliers in the industry.

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The field joint coating system of our PP heat shrink sleeve comprises the following components:

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  • Epoxy Primer: Our specially formulated epoxy primer consists of 100% volume solids and is a solvent-less, two-component epoxy. Typically, the epoxy primer thickness is 200 microns (DFT), but we can customize the thickness according to your specific requirements.
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  • Premanufactured Heat-Shrinkable Sleeve: The wraparound-type heat shrinkable sleeve features a polypropylene-based backing coated with a high-performance hot melt adhesive layer. It includes a closure patch and filler strips to ensure a secure seal.
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As a leading factory and supplier in China, we are committed to delivering high-quality heat shrink solutions to meet the diverse needs of our clients.

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Product Description

Technical data:

Property Test temp. Unit Standard Value Test Method
Thickness mm 2.5 ≥ 2.5 Annex B ISO21809-3
Holiday detection at 5 kV/mm + 5 kV no holiday no holiday Annex C ISO21809-3
Impact resistance (holiday detection at 5 kV/mm 5 kV after recovery) 20℃ J/mm ≧ 10 10.2 Annex D ISO21809-3
Indentation resistance (holiday detection at 5 kV/mm + 5 kV after recovery)
Residual thickness
110℃ N/mm² 10.0 10 Annex E ISO21809-3
mm ≧ 0.6 1.0
Cathodic disbondment at 28 days 23℃ mm ≦ 5.0 4.2 Annex G ISO21809-3
95℃ mm ≦ 10 9.3
Peel strength at 10 mm/min to pipe surface primed with epoxy and to plant coating 23℃ N/mm ≧ 4.0 14 Annex H.1 ISO21809-3
110℃ N/mm ≧ 2.0 2.2
Peel strength at 10 mm/min to pipe surface and to plant coating after 28-day hot-water immersion test at Tmax limited as per Annex I 23℃ N/mm ≧ 2.0 10 Annex I and H ISO21809-3
Lap shear strength at 10 mm/min 23℃ N/mm² ≧ 5.0 5.4 Annex J ISO21809-3
110℃ N/mm² ≧ 1.0 1.5
Thermal ageing resistance (aged at Tmax + 20 °C)
– Elongation at break (E100/E0)
– Peel strength to pipe surface (P100/P100)
23℃ E100/E70 ≧ 0.75 0.91 Annex M ISO21809-3
23℃ P100/P70 ≧ 0.75 0.83
Oxidation induction time on the backing at 220 °C (intercept in the tangent method) min ≥15 ≥15 ISO11357–6
Thermal stability at 130 °C for 50 weeks, installed system 130°C visual No cracks No cracks ISO21809-3 Annex N

Data sheets – Shrinkable materials

Properties Unit Standard Value
Trade name PP heat Shrink Sleeve
Description of coating material Wraparound PP heat shrink sleeve
Color black
Shrinkable material type Polypropylene based, applied over a liquid epoxy layer
Nominal thickness (as supplied) mm 2.5
Adhesive type Polypropylene hot melt adhesive
Storage temperature min/max -20/50
Shelf life at storage temperature month 24

Heat Shrink Sleeve (Wraparound-Type) Specification:

Catalogue No. Specification Catalogue No. Specification
#1 FRDP-PPΦ168×450—1.0/1.5 #7 FRDP-PPΦ508×600—1.0/1.5
#2 FRDP-PPΦ219×450—1.0/1.5 #8 FRDP-PPΦ529×500—1.0/1.5
#3 FRDP-PPΦ273×450—1.0/1.5 #9 FRDP-PPΦ610×500—1.0/1.5
#4 FRDP-PPΦ325×450—1.0/1.5 #10 FRDP-PPΦ711×500—1.0/1.5
#5 FRDP-PPΦ355×500—1.0/1.5 #11 FRDP-PPΦ813×500—1.0/1.5
#6 FRDP-PPΦ426×500—1.0/1.5 #12 FRDP-PPΦ1220×500—1.0/1.5

Note: 1) Closure patch length and thickness are equal to sleeve axial length and thickness, respectively.

Enclosure patch width: 120 mm for sleeves Φ168 ~Φ426 while 150 mm for sleeves > Φ426.

2) Custom-made is available to meet customer special demand.

FRDP-PP Φ168×450—1.0/1.5

1.5: Adhesive Thickness, mm

1.0: Backing Thickness, mm

450: Sleeve Width, mm

Φ168: Pipe Size, mm

FRDP-PP: Product Name

*) F – radiation cross-linked; R – heat shrinkable; D – tape; P – closure patch; PP- polypropylene

Heat Shrink Sleeve width, thickness and design temperature can be offered according to client requirements.

Frequently Asked Questions (FAQ)

What is the maximum operating temperature for PP Heat Shrink Sleeves?
The PP Heat Shrink Sleeves are designed to withstand temperatures up to 130°C for long-term operation. Testing has been conducted at temperatures up to 110°C for various mechanical properties, ensuring reliable performance in demanding pipeline environments.
What is the shelf life of the heat shrink sleeves?
When stored at the recommended temperature range of -20°C to 50°C, the heat shrink sleeves have a shelf life of 24 months. Proper storage conditions are essential to maintain the material properties and adhesive performance.
Can custom sizes be manufactured for specific pipeline requirements?
Yes, custom-made heat shrink sleeves are available to meet specific demands. The width, thickness, and design temperature can be tailored according to your project requirements. Custom specifications are available upon request.
What adhesive type is used in the PP Heat Shrink Sleeve?
The PP Heat Shrink Sleeve uses a polypropylene hot melt adhesive system. The sleeve is applied over a liquid epoxy layer, providing excellent bonding to the pipe surface. The peel strength at 23°C reaches 14 N/mm, significantly exceeding the minimum standard requirement of ≥ 4.0 N/mm.
What pipe sizes are available for the wraparound heat shrink sleeves?
The standard product range covers pipe sizes from Φ168 mm up to Φ1220 mm (catalogue items #1 through #12). The closure patch width is 120 mm for sleeves Φ168 to Φ426, and 150 mm for sleeves larger than Φ426. Custom sizes beyond this range can also be manufactured upon request.
How does the product perform in cathodic disbondment testing?
The PP Heat Shrink Sleeve demonstrates excellent cathodic disbondment resistance. At 23°C over 28 days, the disbondment radius is only 4.2 mm (standard requires ≦ 5.0 mm). Even at elevated temperatures of 95°C, the disbondment value of 9.3 mm remains well within the ≦ 10 mm standard requirement, confirming long-term corrosion protection performance.

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