CALGEN traces are multi-stranded nichrome wire insulated with PTFE to give high temperature rating and weather proofing braided with glass yarn for efficient heat transfer and H type varnish coating . Ideally suited for fuel pipelines carrying FurnaceLSHSPost FCC oilsOther viscous oils in process pipelinesstorage tanks. CALGEN electrical heat tracing is a process of applying heat to the external surface of tankpipe to maintain specific temperature of the contents.