Covalence
Heat-shrink technology for district heating joints
Covalence makes the heat‑shrink sleeve systems that seal the field joints of pre‑insulated district heating and cooling pipes. A cross‑linked PE‑X backing and a dual‑adhesive system keep moisture out of the joint casing. The products are tested and certified to EN‑489:2009 (FFI).
Covalence, products
Wrap‑around heat‑shrink sleeve for sealing the joint casings of pre‑insulated district heating pipes. A cross‑linked HDPE backing (PE‑X) and a dual adhesive: a high‑shear hot‑melt at the edges anchors the sleeve against ground movement, and a visco‑elastic sealant in the centre forms the actual moisture seal. A dimpled Permanent Change Indicator on the backing disappears once the correct shrink temperature is reached, so a finished joint can be inspected afterwards.
- Material
- Cross‑linked HDPE backing (PE‑X) + dual adhesive
- Operating temperature
- max 50 °C (60 °C under expansion cushion)
- Casing diameter
- 90–1200 mm
- Standard
- EN‑489:2009, FFI tested
Closure patch for Covalence wrap‑around heat‑shrink sleeves. Seals the longitudinal overlap of the sleeve. Same cross‑linked HDPE and adhesive construction as the sleeve itself.
Heat‑applied closure patch that seals the foam‑injection hole in a pre‑insulated pipe casing after PUR foaming, keeping water out of the insulation. Two layers: a high‑shear adhesive and a thick cross‑linked HDPE.
- Form
- Round patch, approx. 92.5 mm
- Operating temperature
- max 50 °C
- Standard
- Soil‑stress tested to EN‑489
Where this is used
- District heating joint sealing and corrosion protection
- District cooling networks
- Water pipeline networks
- Oil and gas pipeline joints
When a joint leaks, the street gets dug up. In a gas line the consequences are an entirely different scale.
Covalence, common questions
What are Covalence heat-shrink sleeves used for?
Which standard is Covalence tested to?
Which casing diameters does DualSeal RJS-E cover?
What is the Permanent Change Indicator?
What operating temperature does Covalence withstand?
Where do I get Covalence product data and installation instructions?
Need a Covalence quote?
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