Process Design: [One Question per Week] Week 46 of 2011: In-depth discussion on leakage detection methods in long-distance pipeline design.
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RT. Everyone can draw on their theoretical knowledge and on-site experience to discuss what leakage detection methods exist and what their effectiveness is like Are there any major application cases or something like that? 1. Provide a certain amount of bonus points as encouragement to those who give positive responses; constructive replies may earn additional points or an increase in charm, as appropriate. 2. Please hide replies~
There are many methods for leak detection, and the choice of method depends mainly on the medium in question. Commonly used substances include ammonia water, pH test strips, as well as thermometers and pressure gauges, among others, for detection purposes
Everyone, talk more and learn from each other
To detect leaks, it is necessary to consider the physical and chemical properties of the medium being transported. Based on these properties, certain chemical reagents can be used, such as ammonia water, concentrated hydrochloric acid, and pH test strips. In some cases, pressure and temperature measurements can also be utilized, while in other cases, soap water alone is sufficient for detection
I want to know how to use ammonia test solution
Since it is a long-distance pipeline, could isotopic tracers be considered for leak detection?
It may not be practical to use hydraulic testing to detect leaks in long-distance pipelines; instead, pneumatic testing can be applied section by section, or the alternative tests specified in 9.17 can be used. 9.1.7 Alternatives to pressure testing The alternatives to pressure testing must comply with the requirements of 9.1.1a) 3), and pressure testing can be waived if the following conditions are met: a) All welds that have not undergone the hydraulic or pneumatic testing specified in this standard, including those in pipes and fittings, shall be inspected in accordance with the following provisions: 1) All circumferential, longitudinal, and spiral weld joints shall undergo 100% radiographic testing or 100% ultrasonic testing； 2) All weld joints not included in item 1) above, including those used for connecting structural elements, shall be subjected to penetrant testing; magnetic materials shall be inspected using magnetic particle testing. b) Perform a flexibility analysis of the piping system in accordance with the relevant provisions in Chapter 7 of Part 3 of the standard (GB/T20801.3-2006). c) The system should be tested for leaks using sensitive gases or by immersing it in a liquid. The test requirements shall be specified in the design documents. The test pressure shall be ≥105 KPa or 25% of the design pressure, whichever is lower ； It should be increased gradually to 1/2 of the test pressure or 170 KPa, whichever is lower; an initial inspection should be carried out at this point. Thereafter, the pressure should be increased in stages up to the test pressure, with sufficient holding time at each stage to allow the stresses in the pipes to equilibrate. It seems that there are now acoustic measurement methods available, which utilize the noise generated by fluid leaks to detect and locate such leaks
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Xiaobai, posting for the first time; just sitting on the bench and observing to learn*
Reply to the post? ? It feels a bit awkward. I’d better take a look first and then reply in a targeted manner. Replying right away would be a bit reckless!