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Pipeline Coatings | HTLP80

Supplier: Petro Coating Systems Pty Ltd

Pipeline Coatings HTLP80 wrap-around sleeve & epoxy system

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Pipeline Coatings | HTLP80

The most widely used girth weld protection system for three-layer coated pipes.

Product description

  • HTLP80 field-joint coatings.
  • Construction: Three-layer system:
  • First layer: Liquid epoxy, solvent-free two-component.
  • Second layer: High shear strength copolymer adhesive.
  • Third layer: Radiation cross-linked, high density polyethylene with PCI (Permanent Change Indicator).

The HTLP80 system is a wrap-around heat-shrinkable sleeve which replicates the structure and performance of mill-applied three-layer PE coatings. HTLP80 also has excellent compatibility and has been extensively used on many other mill-applied coatings. By far the majority of the girth welds worldwide on three-layer coated pipes, diameters up to 100" (DN2500), have been coated with HTLP80.

During installation, the epoxy is applied to the prepared pipe surface and the heat-shrinkable sleeve is immediately wrapped around the joint over the wet epoxy. Heat is then applied to the sleeve which shrinks to form a tight fit around the joint.

While curing, the epoxy forms strong mechanical and chemical bonds to the pipe surface & to the copolymer adhesive layer. The radiation cross-linked outer layer forms a tough barrier against mechanical damage and moisture transmission.

Product features/benefits

  • Fully resistant to shear forces induced by soil and thermal movements
    • The HTLP is tough & lasts as long a 3-layer, mill-applied coating.
  • Sleeve applied over wet epoxy---allowing formation of strong mechanical & chemical bonds
    • Allows fast application, combined with high performance!
  • Superior cathodic disbondment and hot water immersion resistance
    • Offers the optimum barrier protection against corrosion.
  • Fully reconstructs the coating of three-layer coated pipes
    • Thus, the HTLP allows the pipeline to have a virtually monolithic coating system.
  • 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.

Product selection guide

  • Max operating temperature
    • 85°C (185°F)
  • Compatible line coatings
    • PE, FBE, Coal Tar,DFBE
  • Min preheat temperature
    • 70°C (158°F)
  • Recommended pipe preparation
    • SA 2½
  • Soil stress restrictions
    • None
  • Performance
    • EN 12068
    • Class
    • C60 UV
    • Class
    • C80 UV

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