We recommend a vacuum based leak detection system for several reasons:
Reason #3: A vacuum system is less prone to clogging.
In case of a liner leak and operating a vacuum system, the vacuum pump of the leak detection system will pull the leaking ammonia to the ammonia analyser. After the leak detection circuit in which the leak occurs has been determined, one is able to dilute the leak in this line with air via the vacuum pump by opening the atmospheric ball valve and in that way one dilutes the leaking fluid and reduces (eliminates) the risk for clogging!
AmmoniaKnowHow.com - Online Roundtable - Corrosion Issues in Ammonia and Urea Plants: Causes, Consequences and Safeguard Solutions
On the 25th of March, AmmoniaKnowHow.com will hold a webinar to discuss corrosion issues in ammonia and urea plants. Industry experts and specialists will share their experience. Incidents and case studies will be presented together with the latest technologies for corrosion prevention and mitigation. AmmoniaKnowHow.com webinars are an opportunity for participants to get together in an interactive setting to examine issues related to operation and maintenance of ammonia and urea plants.
UreaKnowHow.com has reached the impressive milestone of 2000 Round Table discussions. 2000 active Round Table discussion with totally more than 9500 posts or an average of 5 posts per discussion and 2-3 new posts per day. This means everybody who posts a question, for sure will get a reply making the UreaKnowHow.com Round Tables a very valuable information source and place to share experiences.
We thank all participants for their valuable contributions and support and like to highlight and thank very much the 10 most active participants:...Click here to read more
How a vacuum LDS system is able to distinguish a false indication from an ammonia cloud in the atmosphere from a real liner leak ?
High pressure urea equipment consists of a carbon steel pressure bearing wall, which is protected against corrosion by a protective stainless, titanium or duplex steel layer. This protective layer can be an overlay welding, an explosive cladded layer or a loose liner. Any leak in a loose liner will lead to a dangerous situation in that a large surface of the carbon steel pressure bearing wall underneath the leaking loose liner compartment will be exposed to the extremely corrosive ammonium carbamate. Experience has shown that ammonium carbamate can corrode carbon steels with very high corrosion rates up to 1,000 mm (40 inch) per year.
When talking about active leak detection systems, one can distinguish a pressurized system, in which an inert carrier gas stream flows through the leak detection circuits and a vacuum based system, where one pulls vacuum pressure behind the liner. We recommend a vacuum based leak detection system for several reasons.
But how can a vacuum system distinguish a false indication from for instance an ammonia cloud in the atmosphere from a liner leak ?
Urea World News