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Thursday, January 2, 2014

WPCT, Wraparound Heat-Shrinkable Girth Weld Sleeve

WPCT Wraparound Girth Weld Sleeve

WPCT is a two-layer field-joint coating system designed for corrosion protection
of pipelines operating at ambient temperature.

Product Description: WPCT field-joint coating.
Construction: two-layer system:
  • First layer: Visco-elastic low preheat sealant adhesive.
  • Second layer: Thick-walled, radiation cross-linked, high density polyethylene with PCI (Permanent Change Indicator).
WPCT is a wraparound heat-shrinkable, ready-to-fit assembly for the corrosion protection of field girth weld joints in distribution and transmission systems. WPCT is compatible with standard pipe coatings. WPCT can also be used for coating bare, replacement pipe sections and large radius bends. The system is designed to be applied with minimum preheating and is ideal for large diameter water pipe.
The installation is carried out directly on the cleaned and dried (pre-heated) pipe surface without any primer being required. During installation, the heat-shrinkable sleeve is wrapped and shrunk to form a tight fit around the joint. During recovery, the adhesive softens and flows to form a perfect bond with the pipe surface providing protection against corrosion. The radiation cross-linked outer layer forms a tough barrier against mechanical damage and moisture transmission.

Product Features/Benefits: 
  • Dimpled backing provides a 'permanent change' indicator for application of heat ensures correct application heat & allows easy post-heat inspection.
  • Reliable inspectability at any time.
  • Low preheat sensitivity & proven functionality makes installation friendly in combination with high functional performance.
  • High impact and penetration resistance as well as being tough, but flexible even at low temperatures!
  • Sealing adhesive automatically flows and repairs minor mechanical damages, Self-healing effect. Saves extra intervention steps.
  • No special equipment or skills required which makes installation fast and easy while keeping installation costs low.

Product Selection Guide:

Max operating temperature: 104 degrees Fahrenheit / ** For pipe diameters < 16" (DN400): 45°C (113°F)
Compatible line coatings:  PE, FBE, Coal Tar, Tape & Asphalt
Min preheat temperature:  140 degrees Fahrenheit
Recommended pipe preparation:  ST 21/2 - ST3 or SA 21/2
Soil stress restrictions:  Moderate
Performance: EN12068; Class B30

Ordering Information:

Joint Specialists Supplies WPCT as Uni-sleeve (pre-cut sleeve with pre-attached
closure patch).

Select sleeve width that will overlap onto the mill-applied coating
by 2 inches (50 mm) minimum on each side of the weld joint.
When calculating the minimum sleeve width take a 10% shrinkage
during installation of sleeve width into account.

Common widths in which WPCT heat-shrinkable sleeves are supplied include:
  • 11 inch 
  • 17 inch
  • 24 inch
  • 34 inch

Sleeve cut lengths and appropriate closure patch widths depend on the pipe size and product construction,


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