Methods and steps for dealing with thermocouple leaks
Thread Content
The following are the instructions for working with instruments prepared by our company, outlining the methods and steps to take in case of a thermocouple leak, for your reference when handling such situations. 1. Put on protective clothing and work shoes, and bring all necessary protective equipment as well as the required tools and instruments. 2. Ask the process engineers for detailed information, and have them confirm the location on site. After examining the site conditions, fill out the JHA analysis form and request the process team to issue a hazardous work permit. 3. Adhere to a two-person working system, and require process supervisors to be on site for oversight. 4. If the medium is high-temperature, high-pressure, flammable, explosive, or corrosive, contact the process supervisor, safety officer, as well as the workshop supervisor and safety officer to be present. 5. Work can only be carried out once all working conditions are met and safety measures have been implemented. 6. If corrosion and perforation of the protective sleeve cause leakage at the thermocouple tip, first open the thermocouple cover and seal the tip with putty. If leakage persists, contact the process team to shut down the pipeline or equipment, drain the medium inside it, and then replace the thermocouple with a new one. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. 7. If the leakage occurs at the flange gasket, the operator must not stand on the side opposite to the leakage site to avoid being injured by the spraying fluid. First, use a wrench or pipe clamp to tighten the nut on the leakage side of the flange; if leakage persists, contact the process team to shut down the pipeline or equipment, drain the fluid inside it, and then replace the gasket. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. (French-type thermocouple) 8. If leakage occurs at the threaded gasket, the operator must not stand on the side opposite to the area where leakage is occurring to avoid being injured by the spraying fluid. Use a wrench or pipe clamp to tighten the thermocouple; if leakage persists, contact the process team to shut down the pipeline or equipment, drain the fluid inside it, and then replace the gasket. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. (Twisted thermocouple)
It’s a very useful item; in the field of instrument maintenance, safety is extremely important.
A. Regarding the poster’s point 6: If leakage occurs due to corrosion and perforation of the protective sleeve at the thermocouple tip, first open the thermocouple cover and seal the tip with putty. If leakage persists, contact the process team to shut down the pipeline or equipment, drain the medium inside it, and then replace the thermocouple with a new one. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. ”I think the junction box can be unscrewed and replaced with a plug having the same thread size. It can also be clamped using a fixture. B. Regarding the poster’s point 7: If there is a leak at the flange gasket, the workers must not stand on the side opposite the leak to avoid being injured by the spraying fluid. First, use a wrench or pipe wrench to tighten the nuts on the side of the flange where the leak is present; if the leak persists, contact the process team to shut down the pipeline or equipment, drain the fluid inside it, and then replace the gasket. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. (French-type thermocouple) ” “8. In the event of a leak at the threaded gasket, the operator must not stand on the side opposite to the leak site to avoid being injured by the spraying fluid; use a wrench or pipe wrench to tighten the thermocouple. If the leak persists, contact the process team to shut down the pipeline or equipment, drain the fluid inside it, and then replace the gasket. If it is not possible to shut down the pipeline or equipment, contact the Equipment Research Institute for packaging. (Threading thermocouples) also do not require shutdown; it is possible to apply adhesive to the fixture (a pressure-based leak sealing technique).