Heat-Tracing Systems for Hazardous Division 1 Locations

6. Operation, Maintenance, and RepairWARNING: Damaged heating cable orcomponents can cause electrical shock,arcing, and fire. Do not attempt to repair orenergize damaged cable. Remove damagedsections at once and replace them with anew length using the appropriate Raychemsplice kit.6.1 Operation and Inspection6.1.1 Heating Cable OperationTemperature exposure must not exceed that specified in Raychem product literature. Exceeding thoselimitations will shorten product service life.Pipe insulation must be complete and dry to maintain the correct temperature.6.1.2 Periodic InspectionVisual inspection: Heating cable and pipe insulation should be checked periodically to make sure that nophysical damage has occurred.Insulation resistance testing: The system should be tested once a year in accordance with the instructionsfor the Postinsulation Resistance Test in Section 5.10.2, Figure 2.Functional testing of electrical protection and temperature control systems should be done as necessary.The Inspection Record (Appendix G) should be filled out during maintenance of each circuit in the system.6.1.3 Piping System Repair and MaintenanceDuring pipe repair work, disconnect heating cable circuits and protect heating cables from mechanical orthermal damage.Check heating cable installation after pipe repairs and restore thermal insulation following therecommendations in Section 5.7. Ensure that electrical protection devices are working properly.6.1.4 Heating Cable DamageDo not repair damaged heating cable. Remove entire damaged section and splice in a new length, usingRaychem HAK-C-100 kits.Refer to Section 6.2, Troubleshooting, for a summary of symptoms, possible causes, and recommendedcorrections.39