Issues regarding ammonia leakage from high-pressure equipment such as urea synthesis towers
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According to the regulations set by the General Administration of Quality Supervision, Inspection and Quarantine, equipment such as urea synthesis towers must not have ammonia leaks. So what inspection methods are used during annual overhauls or when it is necessary? Is helium leak detection used? What is its effectiveness?
In fact, most companies these days use ammonia penetration; there are no other good alternatives. Companies with lax management have completely abandoned ammonia penetration.
Good question! Who will answer? Wait……
Helium leak detection has too many limitations and is complex; there are no reports on its use in actual maintenance tasks. For urine treatment towers, the focus should be on leak detection during operation, and it is feasible to use ammonia for leak detection after the plant is shut down or during maintenance
Ammonia leakage is not a problem; **the General Administration for Quality Supervision, Inspection and Quarantine should not ban the use of ammonia leakage testing.
Seeking advice on the anti-corrosion and insulation requirements for urea granulation towers
Is the skirt section of the urea synthesis tower also lined with insulation material? What is the full name of the \"General Design Standard of the Fourth Chemical Research Institute\"?
To the best of my knowledge, both high-pressure equipment are inspected using gamma rays
HG/T 4080-2009 Method for Helium Leak Test of Urea Synthesis Tower – This standard specifies the preparations, equipment, procedural steps, evaluation and acceptance criteria, as well as the test report for the helium leak test of urea synthesis towers. This standard applies to the urea synthesis tower in urea plants.