Does anyone have any reference (local/national law or engineering standard/regulation) that provides guidance (or requirement) for setting ammonia gas detectors at ppm levels for alarm and trip (plant shutdown).
Current understanding is somewhere in range of 25-50 ppm for alarm (based on short...
Does anyone have an opinion or technical/legal reference (UK/EU preferred) on the requirement to perform independent and competent checks of relief valve calculations. My experience is that this is common/good practice but I am struggling to find a credible source.
Many thanks
