At what point does the pipeline need to be replaced
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I’ve been using carbon steel pipelines in my installation for several years, and the wall thickness of these pipelines must have decreased over time. Are there any standards regarding this? For example, if the original wall thickness was 8 and it’s now 6, does that mean the pipelines need to be replaced? I’m asking what situations would require the replacement of pipelines. Thank you, extra points
This probably needs to be calculated based on the specific conditions of the medium; it depends on factors such as the annual corrosion rate and the minimum required design wall thickness.
What you’re saying is too abstract, haha
This post was last edited by lovepds on 2017-2-9 09:07. It’s your question that’s too vague; with such limited information, it’s impossible to arrive at a conclusion: lol. It does need to be calculated; it’s not possible to say generally how long it will take to replace it. You can provide the specific process conditions and media, and everyone can help with the calculation.
Replace if the thickness measurement does not meet the temperature and pressure requirements
This post was last edited by lovepds on 2017-2-9 at 10:58. It is indeed necessary to carry out calculations; specifically, one must first determine the minimum wall thickness of the pipe based on the material of the medium, temperature, and pressure. Then, the corrosion rate can be calculated using the operation time of the device and the amount of thinning of the wall thickness. Once this is known, it’s possible to determine how long the remaining wall thickness will last Without doing the calculations, it’s not possible to simply determine **how much longer it can be used. You can share the specific process conditions and materials so that others can help with the calculations. I’m confused; I tried to click edit but it turned into a reply
1. The design life of pipelines is generally 15 years； 2. Replace when frequent leaks occur (corrosion-induced perforations, material degradation and cracking, erosion-induced thinning). 3. Replace when the thickness measurement does not meet the requirements of the original design wall thickness (including corrosion allowance) ； 4. Fails to meet pressure and temperature ratings
It should be determined based on the actual circumstances. If the medium being used is corrosive, then the lifespan under such corrosive conditions will be shorter. There are specific values available that can be used for calculation
““If the thickness measurement does not meet the requirements of the original design wall thickness (including the corrosion margin), it must be replaced” – does that mean it cannot be used if its thickness is reduced?
Can’t answer; no information given about work pressure