Which design codes should be referred to regarding the design life, wall thickness, and corrosion allowance of the device?
Thread Content
This post was last edited by 328104062 on 2016-10-19 08:49. As the title suggests: For various long-life equipment such as hydrogenation reactors, stripping units, distillation columns, heating furnaces, compressors, and inlet pumps (or large pumps), the design life is generally 30 years. For pipelines, it is 10–15 years; for heat exchangers, it is also 10–15 years, with the core components having a lifespan of 3–5 years. Which standards are followed for the design of these containers? Question: 1. What is the design life of the air-cooled system in years? 10-15 years or 3-5 years? 2. What is the design life of a container under alternating stress and fatigue? Such as a pressure swing adsorption tower? 3. What is the relationship between design life and corrosion allowance? 4. Does the pipeline (standard pipe material) have a corrosion allowance? As I understand it, there is no such requirement; after reaching its design life, what tests need to be carried out according to the regulations, and which standards should be followed? Such as annual thickness measurement, record review, etc.? 6. In the as-built drawings, where are the data on the design life indicated? Is it in the random data or in the design drawings? Manager Discussion Group
The Safety Law of the People’s Republic of China on Special Equipment, implemented on January 1, 2014, stipulates that equipment may continue to be used after passing inspections upon reaching its design life. The design life of the equipment is indicated on the drawings.
On the equipment layout diagram, I don’t think I’ve seen this data before; I’ll look for it again
The Safety Law of the People’s Republic of China on Special Equipment, implemented on January 1, 2014, stipulates that equipment may continue to be used after passing inspections upon reaching its design life. The design life of the equipment is indicated on the drawings.
Coincidentally, the first project I’ve worked on is one where the pressure pipes have reached the end of their useful life and need to be replaced. It seems that the thickness of these pipes isn’t checked every year; rather, an inspection is carried out only when they are close to the end of their service life, to determine which ones need to be replaced. At that point, since the certification has expired, it’s necessary to go to the special equipment authorities to re-register and obtain a new certification – it’s quite a hassle~
I would like to know the answers to these questions as well; thank you to all the experts for their replies.
When determining the design service life, a corrosion allowance is usually taken into account, and the equipment specifications will indicate what that allowance is.
I was attending a lecture today, given by someone from the China Special Equipment Inspection and Research Institute, who is involved in formulating relevant regulations and standards. Unfortunately, it’s an industry I’m not very familiar with to begin with; the teacher explained a lot, but I didn’t manage to learn much.
HG/T20580 contains provisions regarding equipment, but they are merely recommendations and not mandatory requirements