As I noted in 2007, the #1 cause of process vessel deflagrations is the manual additions of powders to process vessels which have a flammable atmosphere. NFPA 77 covers this hazard with several solutions, yet many facilities are either not aware of these risks and solutions or simply have their head buried regarding these catastrohic […]
The definition of “switch loading: Switch loading is the hazardous practice of loading a low-vapor-pressure product (such as diesel or heating oil) into a tank compartment that previously contained a high-vapor-pressure, flammable product (such as gasoline) without first cleaning it. This creates a high risk of static electricity generation and explosion, as residual vapors can
This is a classic case of a “routine opening” within a PSM/RMP-covered process that turned fatal for an operator. ALL openings of a process containing a hazardous energy source, PSM/RMP or NOT, can be some of the most hazardous tasks we can ask personnel to perform. At approximately 1:00 a.m. on August 14, 2011, Employee
I have written about it countless times: putting a flange together is, in many ways, more difficult than welding the pipes together. But many businesses don’t want to pay the rates for Certified Welders and Inspectors and believe their own people can do the piping work simply by using flanges rather than welds. “It’s common
We see many compressed gas cylinders of Asphyxiants in labs within large industrial facilities. We even see these labs increasing their quantities and moving to using Dewars (cryogenic liquid storage) to store their asphyxiants. These dewars are a massive game-changer, as both Liquid N2 and Liquid Ar have expansion ratios of 1:700 and 1:860, respectively.
A couple of weeks ago, I had a poll in my FB Group asking: Is a personal single-gas detector necessary within our breathing zone when wearing an Air Purifying Respirator in a potential IDLH atmosphere? For example, responding to a leak alarm for an NH3 or Cl2 leak. And as usual, the group did NOT
This is what over-torquing looks like on a four (4) bolt flange. The gasket began as the image on the bottom and came out as the image on the top! And we wonder how flanges leak, and leak again, and eventually fail?
Recently, I had the opportunity to help a client gain the full picture of what has to be done regarding the BULK TRANSFER hoses to unload their HHC/EHS from Tanker Trucks/ISO Containers and Railcars. Now, before we get into the specifics, I know a number of folks will fall back on the compliance position that
Last week, David Ayers, Ph.D., CSP, CHMM, and I had a nice chat regarding LOTO and Complex Processes, and one of the areas associated with these LOTOs is the “evacuation” of the HAZMAT within the process/system. We did not have enough time for me to get deep into the weeds on this aspect of isolating
An explosion at a large outdoor oil storage tank at Korea National Oil Corporation Pipeline’s Yeongnam branch is preliminarily attributed to static electricity generated during a petroleum component verification process. The incident occurred at a large-scale oil storage facility housing 12 to 14 tanks, raising concerns that it could have escalated into a major disaster.
We see this often, handling, storing, and processing a Class IIIA flammable liquid, and about half will classify the area, and the other half do not. So who is right? Here is my take on the matter as I work thru the risk analysis…
I have written about this incident a couple of times, as it is full of learning opportunities. The biggest of which is the practice of REDUCING PPE after the initial opening was uneventful, and we have “verified” our positive means of isolation is holding. This is a common practice for long-duration jobs and plays a
