Ammonia Systems Safety Assessments

SNCR Safety Assessment


Selective non-catalytic reduction (SNCR) is continuously gaining ground as a post-combustion technology, designed to control nitrogen oxides (NOx) emissions by injecting reagents into the flue gas of conventional combustion systems that burn coal, biomass and waste, such as those found in cement plants.


However, there are specific hazards when ammonia or ammonium hydroxide are used as reducing agents, that can threaten the health and safety of employees, cause considerable environmental damage and compromise the investment. These hazards can be effectively and efficiently managed through a comprehensive safety assessment.

Refrigeration System Safety Assessment


Ammonia refrigeration systems are usually designed according to international standards. However, lessons learned from major industrial accidents have shown that, there are often serious gaps in safety oversight of these systems due to complacency and lack of information regarding special hazards of ammonia systems such as hydraulic shocks during defrost, pipe cleaning with steam, oil draining etc. Successfully identifying and assessing these hazards is the first step in avoiding ammonia releases that may result in disruption in operations, serious injuries and even loss of life.

Why and how to assess and manage ammonia hazards?


    • Find hidden hazards and operability issues such as potential ammonia slips with a HAZOP study
    • Use consequence modelling to determine the extent of a toxic release and update accordingly the evacuation plan
    • Identify explosion hazards and verify the proper selection of explosion proof equipment with an ATEX study
    • Implement a barrier based risk management with Bowtie diagrams
    • Understand hazards, key risk controls and emergency procedures with customized training seminars
    • Visualize how existing and suggested measures contribute to risk reduction with QRA
    • Find out to what extend the system is compliant with international standards and good practice guidance with gap assessment (EN 378, ISO 5149, IOR & IIAR Guidance etc.)

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