China High-Temperature PP Heat Shrink Sleeve Field Joint System from China Suppliers and Factory Manufacturer, Suppliers

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The FRDP-PP high temperature heat shrink sleeve is an essential solution designed for the oil and gas pipeline field joint system. This wraparound type heat shrinkable sleeve (HSS) features a separate closure patch, specifically engineered for newly constructed buried steel pipelines and thermal pre-insulated pipelines. As a reliable product from leading China suppliers and factories, it ensures optimum performance and durability in demanding conditions.

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Properties of the PP Heat Shrink Sleeve (Wraparound-Type)

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The field joint coating system of the PP heat shrink sleeve includes the following key components:

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  • Epoxy Primer: The epoxy primer is a specially formulated, 100% volume solids (solventless) two-component epoxy. With a standard thickness of 200 microns (DFT), we can customize the primer thickness according to client requirements.
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  • Premanufactured Heat-Shrinkable Sleeve: This wraparound-type sleeve is made from 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, making it an ideal choice for pipeline protection.
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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 customer demands. The width, thickness, and design temperature can be tailored according to your project requirements. Please provide your specifications for a customized solution.
What standards do these heat shrink sleeves comply with?
Our PP Heat Shrink Sleeves are manufactured and tested in accordance with ISO 21809-3 standards. All technical properties including impact resistance, cathodic disbondment, peel strength, and thermal stability meet or exceed the requirements specified in the relevant annexes of this international standard.
What is the difference between backing thickness and adhesive thickness?
The backing thickness (typically 1.0 mm) refers to the polypropylene heat shrinkable layer that provides mechanical protection. The adhesive thickness (typically 1.5 mm) refers to the polypropylene hot melt adhesive layer that bonds the sleeve to the pipe surface, ensuring excellent adhesion and corrosion protection.
How is the closure patch applied and what are its dimensions?
The closure patch is used to seal the wraparound sleeve overlap. Its length and thickness match the sleeve's axial length and thickness. The width varies based on pipe size: 120 mm for sleeves Φ168 to Φ426, and 150 mm for sleeves larger than Φ426. This ensures complete coverage and protection of the joint area.

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