https://www.ntsb.gov/investigations/AccidentReports/Reports/HZIR2501.pdf… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...
On October 21, 2015, two mechanical technicians were involved in an incident while attempting to remove a blind flange from supply piping on a Magnet Cooling Water (MCW) System. The mechanical technicians were assisting a welder in obtaining final measurements to make the final connections from the MCW system to a new Cell 14 cryostat…...
A process worker and colleague were preparing for a scheduled maintenance task in the ammonia storage area of a processing plant.As part of a routine purging operation, the process worker connected a flexible rubber hose via a coupling to a purge connection point. The purge hose was charged with nitrogen, and the valve was being…...
The two (2) leading causes of ammonia releases are:… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...
Some industries’ RAGAGEPs will call out the risk of using a butterfly valve as an energy isolation device due to its propensity to “leak by”. In this incident, the valve catastrophically failed, releasing NH3, resulting in a worker and a contractor being hospitalized. I do not know if the valve was locked out, but that…...
Disclaimer: I am NO LONGER a fan of Powered-Air Purifying Respirators (PAPRs). It is not the PAPR’s fault; it is the science behind the increased desire to use PAPRs for all the wrong reasons and how this could be bad news for the users. PAPRs have become increasingly popular over the past decade or so…...
This aspect of respiratory protection is a SAFETY CRITICAL path when using Air Purifying Respirators (APRs), and in my experience, it is rarely done correctly when it is done at all. I teach my program administrators to do precisely what NIOSH has been stating since 2004. When using the Change Out software, use 1 ppm…...
Vapor pressure: Pressure exerted by a saturated vapor above its liquid in a closed container. Three facts are important to remember:… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...
We can see some hazardous gases, even at low concentrations, such as Chlorine (Cl2). But some hazardous gases are “clear/invisible”. So, using Anhydrous Ammonia (NH3) as our hazardous gas… What does 300 ppm of Anhydrous Ammonia (NH3) look like? Note: 300 ppm is the IDLH for NH3 For example, there’s a release of NH3. You…...
During the summer of 2023, a potential explosion was averted at an industrial facility in Southern Ontario. A new printing press, not approved for use in Canada, was installed and started to signal operational issues during testing. Further complicating the matter, an unauthorized individual tampered with the gas meter set, creating an unsafe environment and…...
In the spring of 2024, emergency responders responded to an ammonia leak at a cold storage facility in southern Ontario. The incident occurred on the roof, where a corroded shut-off valve on the hot gas line of an ammonia center evaporator failed, resulting in the release of ammonia gas into the surrounding environment. The cold…...
There are more than 380 substances with IDLH limits. View the current list of substances with IDLH. You can also find IDLH values in CAMEO Chemicals or in the online version of the NIOSH Pocket Guide(link is external). IDLH limits were primarily established to aid in making informed decisions about respirator use. Above the IDLH,…...
