What issues should be noted during the maintenance of circulating ammonia water pipes?
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Due to its long service life, the circulating ammonia water pipes in our plant have developed multiple leaks, and urgent repair is required. I have a few questions I’d like to ask for everyone’s help: 1. We plan to lay a new circulating ammonia pipe; what safety considerations should be taken into account during the connection process? In particular, after blind flanges are installed at both ends of the ammonia pipeline, can hot work be carried out on the existing pipeline? 2. If the supply of recycled ammonia water is stopped and emergency water is used as a substitute, for how long can this be maintained, and what other issues need to be considered? Thank you all! !
The explosive limit of ammonia is between 12.5 and 27. Can volatile ammonia cause an explosion?
2# flysjk can cause an explosion
The explosive limit of ammonia at normal pressure in air is 15–27% (by volume). Ammonia gas released from ammonium solutions can form explosive mixtures in air, so special caution is required. Before carrying out hot work, it is necessary to take measures to isolate the system, clean and purge the pipelines involved in the hot work, ensure that the site and the pipelines undergo successful hot work analysis, and provide proper supervision for the hot work.
If the supply of recycled ammonia water is stopped, how long can operations continue by using emergency water as a substitute? Has any organization tried to address this issue?
It’s best to clean everything thoroughly before starting work; please describe your detailed process pipelines