IEEE 515-2004 pdf download IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Industrial Applications
3.18 heat-transfer aids: Thermally conductive materials, such as metallic foils or heat-transfer cements.
used to increase the heat-transfer rates from the heating devices to the process piping or equipment.
3.19 high-limit temperature: The maximum allowable temperature, including the piping, the fluid, and theheating system.
3.20 integral components: Factory fabricated or field installed electrical terminations and connectionssuch as heat shrink terminations, cold-lead connections. molded-end seals, or splices, which conform to thegeneral shape of the heating device and are exposed to the same environments as the heating device.
3.21 maintain temperature: Specified temperature of the fluid or process material that the heat tracing isdesigned to hold at equilibrium under specified design conditions.
3.22 maximum continuous exposure temperature: The highest temperature to which a component of theheat-tracing system may be continuously exposed (heater de-energized).
3.23 maximum intermittent temperature (energized or de-energized): The highest allowabltemperature to which a heating device or components may be exposed for a period of time as declared by themanufacturer.
3.24 maximum maintain temperature: Specified maximum temperature of a surface or process that theheating device is capable of maintaining continuously.
325 operating voltage: The actual voltage applied to the heating device when in service.
3.26 overjacket: The outermost continuous layer of insulating material applied to protect against corrosionand enhance mechanical protection.
3.27 oversize insulation: A term applied to thermal insulation when the inside diameter of the thermal insu.ation must be larger than the nominal outside diameter of a particular pipe so as to accommodate the heating cable.
3.28 parallel heating cable: Heating elements that are electrically connected in parallel, either continuouslyor in zones, so that the watt density per lineal length is maintained, irrespective of any change in length forthe continuous type or for any number of discrete zones.
3.29 power connection: The connection between the heating device and incoming power.
3.30 rated output: Power/unit length of heating device or total power, at rated voltage, and temperature (ifrequired), normally expressed as W/m (W/ft) or kW.
3.31 rated voltage: The voltage to which operating and perfomance characteristics of a heating device isreferred.
3.32 routine test: A test performed by the manufacturer of the heating device on all devices during or aftelthe production process
3.33 runaway pipe temperature: The highest equilibrium pipe temperature that occurs when the heatingdevice is continuously energized at the maximum ambient temperature.
3.34 series heating cable: Heating elements that are electrically connected in series with a single current
IEEE 515-2004 pdf download
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