Hazardous Materials

The DOT 25′ Attendant Rule

One problem that seems to run wild across all businesses is DOT’s “25 feet and in line of sight” rule for unloading/loading hazardous materials.  Just this year (September & November 2012) the Pipeline and Hazardous Materials Safety Administration issued LOIs on the matter, reaffirming their expectation in regards to this rule.  The letters stated…

Flammable Liquid (and COM DUST) piping “flange jumpers”

In processes handling flammable liquids, “flange jumpers” (also known as “bonding jumpers”) are critical safety components designed to maintain electrical continuity across piping joints. Since piping systems are often coated, gasketed, or subject to corrosion, a standard flanged connection may not provide a sufficiently low-resistance path to ground.

Update on Cl2 release @ Poultry Plant

The Centers for Disease Control released a report today saying that a Tyson poultry plant worker who poured a solution into a 55-gallon drum, releasing chlorine gas, could not read the English label on the drum that would have alerted him to its contents, but Tyson disputes the findings.

Simple difference between “Wet” and “Dry” Chlorine (and it matters – A LOT)

When we are reading RAGAGEPs for Chlorine Process Design, we will certainly see references to “Wet Chlorine” and “Dry Chlorine,” and it’s one of the top questions I get when people/businesses are new to the chlorine business. In the world of process safety and metallurgy, the distinction between Dry Chlorine and Wet Chlorine is one

IFC’s Performance-Based Design Alternative (PBDA) and PSM/RMP

Since 2003, the International Fire Code has offered an “alternative” to complying with all the special hazard chapters of the “code”; it’s called the Performance-Based Design Alternative (PBDA).  This alternative was intended to provide some relief to facilities that are already doing PSM/RMP style activities for their hazardous material(s) and to provide an IMPROVED alternative to

New Reports Recommend Improvements for Acute Exposure Guideline Levels Documentation

Recent reports published by the National Academies Press provide conclusions and recommendations for improving acute exposure guideline level (AEGL) documents for several chemicals and chemical classes. AEGLs were developed by the National Advisory Council to provide values with which to assess acute adverse health effects for extremely hazardous substances (EHSs).

The relationships between Vapor Pressure (Vp), Boiling Point (BP), and Vapor Density (VD)

Approximately 90 percent of hazardous materials (hazmat) injuries are due to inhalation. In general, although some solids are highly hazardous (upon physical contact with the skin or if ingested into the body), gases and liquids with high vapor pressures pose the most significant risks to responders. These chemicals are more hazardous because they can become

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