Vapor Pressure  -  April 24, 2017

By Guest Expert on 4/25/17 10:38 AM

Vapor pressure is defined as the pressure exerted by a vapor in equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's evaporation rate. The pressure exhibited by vapor present above a liquid surface is known as vapor pressure. As the temperature of a liquid increases, the number of molecules transitioning into a vapor also increases, thereby increasing the vapor pressure.

Did you know?

  • In general, vapor pressures of liquids at ambient temperatures increase with decreasing boiling points.
  • The higher the temperature, the higher the vapor pressure.
  • The higher the vapor pressure, the faster a liquid evaporates in ambient air.
  • The faster the rate of evaporation, the more vapor in the air.
  • A substance with a high vapor pressure at normal temperatures is often referred to as volatile.
  • The vapor pressure for a given chemical or product is typically found on a Safety Data Sheet (SDS) in the Physical and Chemical Properties section.
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What's wrong with this picture?  Feb 13, 2017

By Guest Expert on 2/13/17 10:00 AM

Can you see the hazards and regulatory violations?   There are several problems with these how these flammable liquids are being dispensed that are clearly visible in the photo.   

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What's wrong with this picture?  Feb 5, 2017

By Guest Expert on 2/5/17 10:52 AM

Can you see the risk?   Look very closely but the hazard isn't obvious at first glance.   As a hint, this photo was taken during an regulatory and management systems audit of a fuels terminal in South Texas along the border.  

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EPA Proposes adding Natural Gas Processing facilities to the Toxics Release Inventory (TRI) regulations

By Brian Dunagan on 1/20/17 7:26 AM

On January 8, 2017, the U.S. EPA published a proposed rule in the Federal Register adding natural gas processing facilities the list of facilities covered by section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA), commonly known as the Toxics Release Inventory (TRI) and section 6607 of the Pollution Prevention Act (PPA).  This rule proposes to expand coverage to all natural gas processing facilities, which receive and refine natural gas.  The facilities to be covered prepare process gas to meet pipeline or industrial specifications and extract liquid hydrocarbons from the field produced gas.  Natural gas processing facilities that primarily recover sulfur from natural gas are already covered by TRI.  Upstream facilities and operations primarily engaged in natural gas extraction (e.g., exploration, fracking, etc.) are not included in this newly proposed rule.  

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Black Friday and Life Safety

By Brian Dunagan on 11/16/16 12:00 PM

Black Friday is almost upon us and for those of us in the fire and safety business the signs of the coming shopping rush are everywhere in retail stores across the US. Unfortunately, the signs I’m referring to aren’t the countless “Happy Holidays” or “Black Friday” sale signs - I’m talking about the overwhelming crush of freight that is shipped to retailers preparing for the big shopping days to come in the rush to Christmas.  Most retailers struggle with where to store all this merchandise and too frequently it ends up piled to the ceiling in stockrooms, in aisles, and in front of emergency exits, fire extinguishers and other fire and emergency equipment.   When I was a fire marshal inspecting retail occupancies, I found that most of the employees and managers working in these stores have no idea of the real danger posed by high piling combustible materials or blocking emergency exits with merchandise.  Catastrophic fires in retail establishments are classic "high consequence, low probability" events that most retail workers struggle to see as "real" risks and apathy is the typical response, especially when faced with the much more visible problems associated with trying to work and succeed in retail operations.

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Vapor Pressure  -  April 24, 2017

Vapor pressure is defined as the pressure exerted...Read more

What's wrong with this picture?  Feb 13, 2017

Can you see the hazards and regulatory...Read more

What's wrong with this picture?  Feb 5, 2017

Can you see the risk?   Look very...Read more