Flammable Liquids

Why does OSHA’s 1910.146 require O2 to be sampled first?

/ Flammable Liquids, Hazardous Materials, OSHA Compliance, Permit Required Confined Spaces /

Before an employee enters the space, the internal atmosphere shall be tested, with a calibrated direct-reading instrument, for oxygen content, for flammable gases and vapors, and for potential toxic air contaminants, in that order. We test for oxygen before testing for flammability (LEL) for two (2) critical reasons: Here is the breakdown of why this…...

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Controlling Static by managing flow rates

/ Chemical Process Safety (PSM/RMP), Flammable Liquids, Hazardous Materials, OSHA Compliance /

Managing static electricity during the transfer of flammable liquids is based on the fluid’s conductivity, measured in picosiemens per meter (pS/m). High-conductivity liquids dissipate charge quickly, while low-conductivity liquids (static accumulators) hold onto the charge, creating a spark hazard. The following table summarizes the maximum flow velocities recommended by NFPA 77 and API 2003 to…...

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