[Q&A Question 220] 2018.08.14
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【Q&A Question 220】August 14, 2018: Briefly describe how to prevent freezing in process pipelines. 1. Conduct thorough inspections and address any issues found promptly. 2. When the water tanks in the water lines are not in use, clean them out, open them or install blind flanges. 3. Use heat from water tanks when the plant is shut down. 4. Maintain good insulation; repair any damage immediately. 5. Carry out regular maintenance to ensure proper operation of the pipelines. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
1. Conduct thorough inspections and make timely corrections whenever issues are found. 2. When the water line and tanks are not in use, clean them thoroughly, either by opening them or installing blind flanges. 3. Use the water tanks for heating when the installation is shut down. 4. Ensure good insulation; repair any damages promptly. 5. Strengthen maintenance to keep the system operating properly.
Insulate the pipeline； Add a companion heat line ； Keep the medium flowing within the pipeline ； Blow out rarely used pipelines and remove flanges ；
Add heat tracing tubes, implement electric heat tracing, and install reverse blowing pipelines to ensure that the pipelines are empty when not in use
1. Conduct thorough inspections and make timely corrections whenever issues are found. 2. When the water line and tanks are not in use, clean them thoroughly, either by opening them or installing blind flanges. 3. Use the water tanks for heating when the installation is shut down. 4. Ensure good insulation; repair any damages promptly. 5. Strengthen maintenance to keep the system operating properly.
1. Heat tracing, 2. Insulation, 3. Maintaining a certain circulation volume
Answer: 1. Conduct thorough inspections and make timely corrections whenever issues are found. 2. When the water lines and tanks are not in use, clean them thoroughly, open them or install blind flanges. 3. Use the water tanks for heating when the installation is shut down. 4. Maintain good insulation; repair any damages promptly. 5. Strengthen maintenance to ensure proper operation.
Insulate the pipeline； Add a companion heat line ； Keep the medium flowing within the pipeline ； Blow out rarely used pipelines and remove flanges
1. Ensure proper heat tracing and insulation for the pipes to prevent freezing due to heat loss； 2. Set the appropriate degassing point to prevent the accumulation of condensate ； 3. Shut down the pipeline and drain it promptly ； 4. Reduce the number of open pipelines; use blind flanges and similar devices to seal them as much as possible ； 5. Strengthen inspections and monitoring of operations, and address any abnormalities promptly.
1) Water line for the process. For any installations on the ground that use a small amount of water, it is necessary to ensure that there is a drain valve at the end of the pipeline to maintain a continuous flow of water and prevent freezing; where possible, insulation should be added to the pipeline. 2) For some pipelines that are not used in normal production, such as startup circulation lines and lines for defective products, being in an inactive state for long periods can result in water accumulating in dead corners and freezing. Once these pipelines need to be used, this freezing can cause blockages and disrupt production. For such pipelines, before winter arrives, it is necessary to clean and flush them with an appropriate flow rate, then close the relevant valves to keep them in a standby state. 3) For pipelines whose location is below the inlet position of the tank, the first valve at the tank base should be opened whenever it is needed and closed promptly after use; it must not remain open for an extended period, to prevent water stored in the tank from flowing into the pipeline and causing freezing.
1. Ensure proper insulation and heat tracing of the relevant pipelines. 2. Carry out drainage operations in a timely manner. 3. When pipelines are taken out of use, drain them completely and seal them off. 4. Strengthen inspections and monitoring, and address any abnormalities promptly. 5. Treat equipment in the same way as pipelines