A 62-year-old technician was killed when an LNG vapor cloud exploded while he offloaded liquefied natural gas (LNG) from a tanker semi-trailer. Heworked for his employer, a natural gas supplier, for about five (5) years. The technician was offloading the trailer at a temporary and mobile LNG transfer station. The trailer belonged to the technician’s […]
Choosing between methane and pentane for calibrating a direct-reading combustible gas indicator (CGI) depends primarily on your specific application, the target hazards in your environment, and sensor technology constraints. But there are BOTH a “Pentane Advantage” and a “Methane Advantage” Match the Target Gas (Best Practice for Specific Hazards)
When you pump reactive, highly polar, or oxidizing gases like chlorine (Cl2), chlorine dioxide (ClO2), or ammonia (NH3) through standard silicone, polyurethane, or Tygon tubing, the tubing acts like a chemical absorber/scrubber. The gas is actively consumed or trapped by the hose before it ever reaches the instrument’s sensors. This creates severe process safety and
On May 27, 2025, a catastrophic explosion and fire erupted at a chemical manufacturing plant operated by Shandong Youdao Chemical Co., Ltd. (often referred to as Gaomi Youdao Chemical) in Gaomi City, Shandong Province, China. The explosion killed 12 people, injured 19 others, and caused widespread structural destruction throughout the surrounding area. In July 2026,
For a formal liquid bubble leak test using a detector like Swagelok Snoop, the industry-standard minimum pressure governed by ASME Section V, Article 10 and ASME B31.3 is 15 psig or 25% of the system design pressure, whichever is less. While SNOOP itself will bubble at virtually any positive pressure where gas escapes, engineering codes
As we have discussed before, the PREFERRED pressure/leak testing method is hydrostatic. This is the “rule” for all of the ASME B31 series RAGAGEPs; however, for some odd reason, many businesses believe that pneumatic testing is “easier, cleaner, and cheaper” and will just perform their testing with little to no consideration for using hydrostatic methods.
The Industrial Safety and Health Department has directed all seafood processing units to relocate labor quarters to safe locations from the processing units immediately. The order comes in the wake of the NH3 leak tragedy that left 18 workers dead, as their accommodation was in close proximity to the factory’s Engineroom. Following the incident, the
Fireproofing piping supports — specifically the application of Passive Fire Protection (PFP)— is a critical mitigation strategy designed to prevent the structural collapse of pipe racks during a flammable liquid fire. In most state fire codes and the IFC, flammable liquid piping supports inside a secondary containment are REQUIRED to be protected from the effects
In February 2024, the Federal Motor Carrier Safety Administration (FMCSA) and PHMSA issued a safety advisory to provide notice of the possibility of catastrophic failure of nurse tanks. This notice focused on nurse tanks manufactured from January 1, 2007, through December 31, 2011, by American Welding and Tank (AWT) at its Fremont, Ohio plant. Nurse
Every once in a while, I come across a process design that leads to code issues down the road. This usually occurs with small pressure vessels (e.g., less than 5 cubic ft) that fall outside the scope of ASME Section VIII and also fall outside the scope of being a “confined space” (e.g., too small
The definition of stationary source includes transportation containers used for storage not incident to transportation and transportation containers connected to equipment at a stationary source for loading or unloading (40 CFR Section 68.3). In a January 6, 1998 final rule (63 FR 640), EPA clarified that if a container remains attached to the motive power that
There is no specific list of substances that subjects a stationary source owner or operator to the general duty provisions. The general duty provisions apply to owners and operators of all stationary sources that have any “extremely hazardous substances”. Extremely hazardous substances are NOT limited to the list of regulated substances listed under section 112(r),
