ISO 21809 Type 14 Compliant Two-Layer Heat Shrink Tape for Direct Adhesion to Steel and PE Field Joint Coating

Two-Layer Heat-Shrinkable Field Joint Coating for PE-Coated Pipelines

Our ISO 21809 Type 14 2PE Heat Shrink Tape is a two-layer, heat-shrinkable wraparound sleeve designed for the corrosion protection of field joints on two-layer polyethylene (2PE) coated steel pipelines. Unlike three-layer systems that require a liquid epoxy primer, this 2PE tape relies on a high-performance hot-melt adhesive to bond directly to the prepared steel surface and the adjacent PE plant coating, forming a continuous, watertight seal without the need for a primer layer.

The product is classified under ISO 21809-3 Type 14 for heat-shrinkable coatings and is suitable for buried and submerged pipeline service where a two-layer coating system is specified.

The absence of an epoxy primer layer distinguishes the 2PE system from 3PE alternatives. The hot-melt adhesive is formulated to achieve strong adhesion directly to steel, making the system suitable for applications where the specified coating type is 2PE.

ISO 21809-3 specifies requirements for field joint coatings on buried and submerged pipelines. Type 14 designates heat-shrinkable coatings, with sub-classifications based on system construction and temperature rating. A Type 14 2PE system is a two-layer heat-shrinkable tape without an epoxy primer, suitable for 2PE mainline coatings.

The standard requires qualification testing of the complete applied system, including peel strength, cathodic disbondment resistance, impact resistance, indentation resistance, and thermal ageing at the maximum design temperature. This product is designed to meet the performance requirements of the applicable Type 14 classification.

• 2PE-coated pipeline field joints – Girth weld corrosion protection where the mainline coating is two-layer polyethylene
• Buried and submerged pipelines – Onshore and offshore service environments
• Pipeline repair and rehabilitation – Restoration of damaged field joint coatings on 2PE lines
• Compatible plant coatings – PE and compatible mainline coatings

• Surface Preparation: Abrasive blast clean the steel cutback to Sa 2½ or equivalent; clean and roughen the adjacent PE coating overlap zone.
• Preheat: Preheat the steel surface to the manufacturer’s recommended temperature.
• Position Tape: Wrap the heat-shrinkable tape around the joint, centering over the weld with equal overlap onto the PE coating on both sides.
• Apply Closure: Secure the closure patch or locking strip along the overlap.
• Shrink: Apply heat uniformly with a propane torch, working from the center outward, until the backing shrinks and adhesive flows at the edges.
• Inspect: Verify complete shrinkage, adhesive flow, and absence of voids or lifted edges.

CNPetro — Protecting pipelines. Advancing performance.

For product data sheets, ISO 21809-3 qualification documentation, or technical consultation, please contact our sales team.

Keywords: ISO 21809-3 Type 14, 2PE heat shrink tape, heat shrinkable wraparound sleeve, two-layer field joint coating, PE pipeline corrosion protection, primer-free heat shrink tape