Service life of simple pressure vessels
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This post was last edited by chuan21206 on 2024-3-28 at 13:49. I would like to ask my senior colleagues: what is the typical service life of simple pressure vessels? Are there any relevant specifications or standards that clarify this? If there are any standard specifications, please let me know as well. Thank you! For simple pressure vessels whose design drawings do not specify a clear design service life, the inspectors from the Quality Supervision Bureau said it is 10 years; however, we could find no mention of 10 years in the relevant standards, and such vessels have always been treated as having a service life of 20 years.
The service life of simple pressure vessels varies depending on factors such as material, design, and operating environment. In China, the specified period is generally 8–16 years; for specific details, refer to relevant standards and regulations such as the \"Regulations on Safety Supervision of Pressure Vessels\". The final decision still needs to be based on specific circumstances and the results of regular inspections. .
The latest regulations specify 15 years for general pressure vessels, with some extending to 20 years. The design life of containers made of chromium-molybdenum steel and similar materials is 30 years. A design life of 10 years for general pressure vessels is an outdated requirement.
It used to be 10 years, but now it’s usually 15-20 years
It applies only to the service life of simple pressure vessels; the service life of such vessels is clearly specified in the relevant regulatory guidelines.
Hello, brother. I’d like to ask you: when performing strength checks on simple pressure vessels, is the allowable stress in SW6 the one built into SW6 itself, or is another value used?
HGT20580-2020 8.0.4
Even for simple pressure vessels, it is impossible to discuss their design service life without taking into account the materials, operating environment, and medium involved. The values provided in HG/T 20580 are merely reference figures; today’s equipment drawings specify the design service life, and once this period has been exceeded, the vessel must be monitored in accordance with TSG21. If the design service life is not indicated on the old drawings, and the quality supervision agency claims it is only 10 years, then they should provide evidence for that claim
Regulations and standards do not specify a service life for the design of simple pressure vessels; generally, design and manufacturing units adopt a lifespan of ten years； The users always strive to have a longer design service life for the equipment. As for the design and manufacturing units, considering that these vessels do not require mandatory regular inspections during use, unlike other pressure vessels, and although clause 7.1.11 of the \"Regulations on Fixed Pressure Vessels\" sets out requirements for inspection of simple pressure vessels, the users do not have, nor are they equipped with, the professional personnel needed to carry out such inspections. Therefore, many design and manufacturing units specify a design service life of ten years ； Some users also require a design service life of 30 years; generally, the design and manufacturing companies will specify in the design documents that regular inspections should be carried out according to Chapter 8 of the \"Code for Fixed Equipment\" after 10 years.
We are a manufacturing unit that only uses pressure vessels; we do not conduct strength checks unless there are special circumstances.