IEEE/CSA 844.4-2019 ✓ Most Recent

This standard provides for the application of impedance heating systems for steel or steel alloy pipe and equipment. It provides recommendations for design, installation, maintenance, and repair of these systems in general industry applications. This standard applies to impedance heating systems intended to be installed in ordinary and hazardous locations with potentially explosive atmospheres. The hazardous locations include the following: In Canada Zone 2; Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in CSA C22.1; and In the U.S. Class I, Zone 2; and Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in the NEC. This standard, when used with other recognized codes and standards, is intended to cover impedance heating systems in its entirety, including system design, specification, installation, operation, testing, commissioning, and maintenance. This standard also addresses the following associated systems which are important to the performance of impedance heating systems: a)Thermal insulation system; b)Electric power supply system; c)Electric grounding system; and d)Control and monitoring system.