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:
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:
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,
FYI… the state of NJ’s Right to Know Hazardous Substance Fact Sheets are the bomb and with WISER gone, these move up to my #1 go-to ER document. We need three (3) reliable sources to formulate our Incident Action Plan (IAP) that includes our PPE Hazard Assessment. These Fact Sheets, NIOSH’s Pocket Guide Book, and
As we have discussed many times, I am a strong advocate of the SIF approach to risk management. Growing up in the PSM arena, we realize that the entire process safety effort is built on the SIF model. However, for those unfamiliar with managing catastrophic risks, SIF can become just another “flavor of the year”
