Transcription of Engineering Specification for Electrical Heat- Tracing ...
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Copyright 2015 Chromalox, Inc. All rights reserved. PJ333 April 2015 Engineering Specification for Electrical Heat- Tracing Systems Contents Scope Codes, Approvals, and Standards Materials Self- regulating Heating Cables Freeze protection systems with no steam exposure Process temperature maintenance systems with no steam exposure Freeze protection or process temperature maintenance systems with steam exposure Systems for Division 1 hazardous locations Termination for Self- regulating Heating Cables Mineral Insulated cable Systems Thermostats and Contactors Control, Monitoring and Power Distribution Systems Engineering and Design Field Support and Training Scope This Specification covers the requirements for materials and support services for electric Heat- Tracing systems supplied by the vendor.
3.1. Self-Regulating Heating Cables All heat-tracing systems for use at temperatures up to a continuous exposure (maintain) of 302°F (150°C) and intermittent exposure temperature of 420°F (215°C) shall use a self-regulating heating cable. A) Self-regulating heating cable shall vary its power output relative to the temperature of the surface of
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