Three product families, three different jobs.
Covalence brings heat-shrink technology to district heating, gas and oil. Stopaq is the self-healing corrosion protection for industry and water networks. BG Industry's heat-shrink joints go on pre-insulated pipes.
Choose this when the joint is on pre‑insulated pipe and the sizes vary: the sleeve is wrapped on site and covers casings from 90 to 1200 mm, including repairs and dimensions outside a standard series.
Choose this when the surface is bare steel or an irregular shape: bends, valves, flanges, tanks, and corrosion under insulation. ST2 cleaning is enough, no blasting is needed, and it works as prevention as much as repair.
Choose this when the pipe size falls in the DN 90–450 standard series and many similar joints are made: the prefabricated sleeve is fast and repeatable, no welding is needed, and the joint is leak‑testable.
One install lasts the service life of the pipe in the ground.
| Traditional method | Stopaq + Covalence |
|---|---|
| Coating recoated about every ten years | Lasts the service life of the pipe in the ground |
| Blasting and priming before application | Wire brushing to St 2 is enough, no primer |
| Coating cracks when the ground moves | The visco-elastic compound self-heals small defects |
| Can interfere with cathodic protection | Compatible with cathodic protection |
| Curing time before backfilling | Applied cold, can be covered immediately |
| Applied with a torch or by blasting | Applied cold, no torch |
Figures from the Stopaq and Covalence manufacturer datasheets (Seal for Life).
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The product families split into two jobs
Damage almost always starts at the joint, or wherever the steel is left bare, whether the line carries district heating, gas or an industrial process.
Sealing the joint casing of pre‑insulated district heating and cooling pipes. The joint stays dry, and the insulation stays dry for the service life of the pipe.
Covalence · BG IndustryProtecting buried and industrial lines against external corrosion. Self-healing protection for bare steel, applied cold without blasting.
StopaqWhat longer protection means for the network owner:
Longer service life lowers lifecycle cost
Fewer maintenance shutdowns
Faster installation on site
The pipe can stay in service during the work
Compatible with cathodic protection
One supplier for the whole joint
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