China China Suppliers PP Heat Shrink Sleeve (Wraparound-Type) Field Joint System - Factory Direct Quality Manufacturers, Factories

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The FRDP-PP high-temperature heat shrink sleeve, designed specifically for oil and gas pipeline field joint systems, is an advanced wraparound type heat shrinkable sleeve (HSS). This product is ideal for newly constructed buried steel pipelines and thermally preinsulated pipelines, ensuring robust protection and durability in demanding environments.

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

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

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  • Epoxy Primer: Our specially formulated epoxy primer is a 100% volume solids (solvent-free) two-component epoxy, yielding a general thickness of 200 microns (DFT). Custom primer thickness can be offered to meet specific client requirements, making us a leading choice among suppliers in China.
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  • Premanufactured Heat-Shrinkable Sleeve (Wraparound-Type): This innovative heat-shrinkable sleeve features a polypropylene-based backing that is coated with a high-performance hot melt adhesive layer. The wraparound design includes a closure patch and filler strips for effective sealing, offering superior protection for pipeline joints. Our factory produces these sleeves to the highest quality standards.
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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
Residual thickness mm ≥ 0.6 1.0
Cathodic disbondment at 28 days 23℃ mm ≤ 5.0 4.2 Annex G ISO21809-3
Cathodic disbondment at 28 days 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
Peel strength at 10 mm/min to pipe surface primed with epoxy and to plant coating 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
Lap shear strength at 10 mm/min 110℃ N/mm² ≥ 1.0 1.5
Thermal ageing resistance (aged at Tmax + 20 °C) – Elongation at break (E100/E0) 23℃ E100/E70 ≥ 0.75 0.91 Annex M ISO21809-3
Thermal ageing resistance – Peel strength to pipe surface (P100/P100) 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

What is the standard thickness of PP heat shrink sleeves?
The nominal thickness of PP heat shrink sleeves is 2.5mm, with a minimum guaranteed thickness of ≥2.5mm according to ISO21809-3 standards.
What is the shelf life and storage temperature range for heat shrink sleeves?
Heat shrink sleeves have a shelf life of 24 months when stored at temperatures between -20°C and 50°C.
What pipe sizes are available for wraparound-type heat shrink sleeves?
Standard sizes range from Φ168mm to Φ1220mm. Custom sizes can be manufactured according to specific customer requirements.
What is the adhesive type used in PP heat shrink sleeves?
The sleeves use polypropylene hot melt adhesive, which is applied over a liquid epoxy layer for optimal bonding to the pipe surface.
What are the peel strength requirements at different temperatures?
At 23°C, the peel strength must be ≥4.0 N/mm, while at 110°C it must be ≥2.0 N/mm. These values ensure reliable adhesion across the operating temperature range.
Can the heat shrink sleeve specifications be customized?
Yes, heat shrink sleeve width, thickness, and design temperature can be customized according to client requirements. Custom-made solutions are available to meet special demands.

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