The US Coast Guard (USCG) has recently investigated a fire on board an inspected towing vessel which resulted in the vessel suffering a loss of propulsion. The source of the fire was determined to be heat cables (also referred to as heat tracing cable or heat tape), which were improperly installed to prevent condensate from forming and freezing within hoses used to transmit compressed air for the vessel’s air-operated engine throttle control system.
The heat cables were designed to be installed on fixed piping systems. They were not designed to be used on hoses or in applications which subjected the heat cables to movement. This installation had the heat cables wrapped around hoses connected to a retractable pilot house, which would move whenever the pilot house was raised or lowered. This movement subjected the cables to stresses from flexing and bending for which they were not designed. Continue reading “Improper use of heat cables is a fire hazard”