What is the specific difference between the compactness and sealing performance of pressure vessels?
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This post was last edited by Sammy_Wang on 2016-3-21 at 10:55. In HG 20660 - 2000, \"Classification of Toxic Hazards and Explosion Risks of Chemical Media in Pressure Vessels,\" classification is carried out based on the toxic hazards and explosion risks of chemical media, and this classification is used to determine the category of pressure vessels as well as the technical requirements regarding their tightness and sealing properties. What do density and sealing here refer to? Could you explain it in more detail?
The tightness test, also known as the pressure-free test, is primarily used to check the integrity of welded pressure vessels, equipment, and structures. The methods include: 1. Liquid filling leak test: For devices that are not under pressure, some liquid is poured into them to test the tightness of the welds. 2. Airtightness test: Compressed air is introduced into the container or pipeline, and soapy water is applied to the external welds to check for any bubbling or leakage. 3. Ammonia test: Ammonia gas is introduced to one side of the weld, while a test strip soaked in a phenolphthalein-alcohol water solution is placed on the other side of the weld; if there is a leak, the test strip will turn red. 4. Kerosene leak test: Apply chalk powder water to one side of the weld, and soak the other side in kerosene. If there is a leak, kerosene will leave oil stains on the chalk. 5. Helium test: The density of the weld is determined using a helium leak detector. 6. Vacuum chamber test: Apply soapy water to the weld, then create a vacuum using a vacuum chamber; if there is a leak, bubbles will form. Suitable for areas where the other side of the weld is enclosed, such as the welds at the bottom of storage tanks.
Density test: primarily used to determine the tightness of pressure vessels, equipment, and structures after welding. Airtightness test: compressed air is introduced into the vessel or pipeline, and the external welds are inspected to check for any leaks