Sealing Electrical Ducting

Franklin’s electrofusion entry seals are designed to weld UPP™ components into a single homogeneous piece. This is just as important in UPP™ electrical ducting as it is in UPP™ electrofusion pipework for fuel.

3x75mm Corrugated Duct in UDS Silicon Sealant[2] Sometimes, our technicians see installations where alternative methods have been used to seal pipework, although it’s not always clear why that decision was made.

In the image above, an installer has chosen to use UDS Silicon Sealant as a seal on the electrical ducting, rather than using the recommended electrofusion process. In this instance a sealant was not used in addition to the electrofusion welding process, but was used instead of electrofusion welding. By not using the recommended installation procedure the installer has compromised the integrity of the electrical ducting, making it much more likely to fail or to require expensive and difficult repairs at a later date. Additionally, non-vapor-tight sealing of the duct internals can be a health and safety hazard, as fuel vapor from the fuel can track up the duct back to the tank gauge cabinet.

The question here is: why would an installer spend the time and effort to ensure that their fuel system is leak-tight, only to compromise that with the electrical ducting?

Franklin’s electrofusion process has been deliberately designed to not require additional sealant, so there is no need to add any sealant to the welded joint after the weld is completed. Any sealant is temporary and could possibly mask a problem with the weld, while it will make any repairs more difficult.

For optimal performance, Franklin advises all installers to follow the recommended procedures when installing any FFS petroleum equipment.