What are the causes of internal leakage in cold/heat exchangers?
Thread Content
Let’s discuss the reasons for internal leakage in the unit’s cold/heat exchangers
Corrosion is the main cause, followed by the poor quality of corrosion protection on the equipment.
1. Corrosion is a very troublesome problem； Recently, our factory has been in a period of major maintenance, during which many heat exchangers have been opened for either replacing the end caps or the tube bundles. Corrosion is one of the main influencing factors! 2. It is the quality issue of the equipment itself. 3. It’s a matter of operation; generally, for heat exchangers, cold material should be fed in first and hot material later.
Inner gasket damaged, corroded, partially blocked, overpressure or incorrect operation
The main reasons are as follows: First, corrosion – the materials in the tube side and shell side were severely corroded due to the use of inappropriate materials. Second, during the initial startup phase, the pressure testing of the facility was carried out as per regulations, which led to damage under certain pressures and resulting losses.
The water volume should have its pH level adjusted, or it needs to be purified. It’s a problem when the inner tubes of the heat exchanger get damaged; measures should be taken as early as possible
The main reasons are: 1. Corrosion of the medium, such as oils, acidic gases, circulating water, etc. 2. The equipment has poor quality and its materials are substandard. 3. The operating conditions are unstable, with large fluctuations in pressure and flow rate. 4. During startup and shutdown, the temperature and pressure increase too rapidly. 5. Misoperation, resulting in pressure buildup in the equipment.
Add a new reason: Using frequency converters can also cause leaks in the heat exchangers!!!!!!!!!!!! Everyone should be careful.
I think what was said on the 7th floor covers it all very well.
I think there are mainly 3 reasons: 1. Corrosion. 2. The heat exchange equipment often experiences uneven heating and cooling, or frequent water hammer vibrations. 3. The impact of coking and scaling removal in cold exchange equipment on the tube bundle.
What the higher-level posters said is all correct, but there’s one more thing: when sweeping in one direction, the other direction must be kept at vacuum; otherwise, it’s easy to damage the equipment