Daily maintenance and inspection methods for high-pressure pipelines
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After the explosion at Yuntianhua, reports indicated that it was caused by a rupture in the outlet pipeline of the ammonia synthesis tower. It is evident that, as chemical processing plants, it is very important to strengthen the daily maintenance, management, and inspection of pressure pipelines. So, I’d like to ask the forum members to discuss: How do you manage pressure pipelines? In particular, how are high-pressure pipelines inspected?
The daily maintenance and management of pressure pipelines are extremely important, and leaders also emphasize this frequently; however, the question is how to carry out these tasks effectively. In my opinion, there are not many tasks that can be carried out on a regular basis: 1. Ensure good insulation to prevent corrosion caused by condensation. 2. Prevent large fluctuations in pressure and temperature, and avoid harmful treatments (this one is a bit far-fetched). 3. Inspect pipe clamps and lifting devices to reduce pipeline stress. Mainly major repairs: 1. Corrosion monitoring. 2. Life expectancy prediction. 3. When replacing pipes, pay attention to the material and construction quality. Please offer your corrections and additions! Additionally, the problem with Yuntianhua is said to be due to an incorrect material, which is why the pipes were replaced not long ago.
Agree with the first floor’s opinion; monitoring and management of the pipes used in the synthesis process, as well as the bolts and gaskets, are also necessary, given that they are made of a relatively special material. Last edited by lxq700918 on 2009-4-18 21:07.]
Although high-pressure pipelines are just as important as high-pressure equipment, most organizations still do not pay enough attention to them! I think there are several aspects to the management of high-pressure pipelines: 1. They need to be well maintained. The insulation of high-pressure pipes must be in good condition; the pipes must be properly reinforced to prevent vibration, and the safety devices on the pipes must be functional ； 2. Regular monitoring. High-pressure pipelines should be subject to regular monitoring and flaw detection, just like pressure vessels, in order to eliminate potential hazards. 3. The process operation must be carried out with care. Process operators are the main maintainers of the equipment
It should be explicitly added that \"ultrasonic wall thickness testing\" is necessary, especially for elbows and pipes that have been in use for many years; their thickness must be checked and recorded in a ledger.