One means of controlling ignition sources in Hazardous Locations (HAZLOC) is to “pressurize” the enclosure/cabinet. This is not usually a primary means of protection but is a fallback when a facility realizes that an electrical enclosure/cabinet is sitting in their newly recognized Class 1, Div 2 HAZLOC. So I get a panic e-mail about this […]
One means of controlling ignition sources in Hazardous Locations (HAZLOC) is to “pressurize” the enclosure/cabinet. This is not usually a primary means of protection but is a fallback when a facility realizes that an electrical enclosure/cabinet is sitting in their newly recognized Class 1, Div 2 HAZLOC. So I get a panic e-mail about this
UPWARDS and UNOBSTRUCTED – say it again! UPWARDS and UNOBSTRUCTED. Two simple and very clear terms that so many struggle with when it comes to Relief System Designs. Here is a horizontal discharge of a relief valve on an NH3 vessel. The discharge height is ~20′ but we can see how the gas is dispersing.
UPWARDS and UNOBSTRUCTED – say it again! UPWARDS and UNOBSTRUCTED. Two simple and very clear terms that so many struggle with when it comes to Relief System Designs. Here is a horizontal discharge of a relief valve on an NH3 vessel. The discharge height is ~20′ but we can see how the gas is dispersing.
This past week a small ice plant in São Luís – State of Maranhão, Brazil experienced what can only be described at a “catastrophic failure” of a pressure vessel. Details of what/how this happened are sketchy at best; however, the video shows us what anhydrous ammonia can do when it is “blocked-in”. I am assuming this
This past week a small ice plant in São Luís – State of Maranhão, Brazil experienced what can only be described at a “catastrophic failure” of a pressure vessel. Details of what/how this happened are sketchy at best; however, the video shows us what anhydrous ammonia can do when it is “blocked-in”. I am assuming this
Most safety and emergency response personnel understand that an Emergency Action Plan (EAP) is intended to cover the reporting, sounding an alarm, and evacuating and accounting for everyone. But most will say 1910.120(q) applies ONLY when the facility has a “response team”, but is this correct? Way back in the 1990’s OSHA stated the following
This is an excellent video that takes us through the progression of an ammonia (CAT 2 Flammable Gas) explosion. A contractor working in the engine room reported the smell of ammonia @ 6:04 a.m. A maintenance worker entered the engine room at 6:24 a.m. and did not smell/see/notice anything unusual!!! I am guessing they did
Jack Rabbit: Chlorine Properties is a 28-minute video that uses footage from the Department of Homeland Security’s Jack Rabbit release trials to demonstrate chlorine’s dispersion properties. The video covers the following topics: Introduction Dispersion Pressure Differentials, Phase Changes, and Thermal Considerations Density Different Atmospheric/Land Conditions
We should be doing MONTHLY inspections on our LEVEL A suits (regardless of manufacturer) and this month, those of us who use DuPont Tychem® Level A suits will need to take some special actions due to a change that DuPont implemented several years ago. Effective September 1, 2013, DuPont transitioned to Pirelli valves for all
