Technical Bit
Parallel circuit heating tape is designed to be cut from reel lengths and site terminated to suit pipe work.
The heating tape consists of a number of short heating zones, up to 1m long, each connected across a pair of
continuous bus wire conductors.
Each complete heating zone will give its full rated design output with circuit voltage applied to the bus-wire conductors.
Construction
The heating tape has a core comprising two bus-wire conductors contained within an extruded silicone rubber sheath.
This sheath is notched on alternative sides, at predetermined intervals, to expose a short section of bus-wire conductor.
Nichrome resistance wire is wound at regular spacing around the core as a continuous conductor,
making contact with the bus-wire at the exposed points.
After completion of heater conductor winding a high temperature soldered joint is made at each contact point
ensuring that a number of conductor strands are securely bonded to the bus-wires.
An extruded outer sheath is then placed over the core and heater element to complete the heater tape assembly.
For certain applications a heating tape may have a stainless steel or plated copper braided outer cover
and a silicone outer over sheath can be fitted. |
