Hazardous Materials

State Supreme Court agrees… N2 is not a toxic gas

As we have discussed before, Nitrogen (N2) Gas is NOT a toxic gas. It is an INERT gas. It has NO exposure limits, and in fact, 78% of every breath we take is N2. However, too much N2 will displace the Oxygen (O2) in the atmosphere, potentially creating a lethal atmosphere. In March of 2016,…...

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Line Break gone bad – pipe not at a ZES (IMCA Safety Flash)

A member of a team of workers dismantling subsea emergency shutdown valves (ESDV) on deck was badly injured when hit by parts of a valve that were ejected with force. The team had successfully and without any problems already dismantled three (3) valves / ESDV as per the plans for that night. As the last…...

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Lack of Excess Flow Valve leads to liquid LPG release

After filling a propane cylinder at a service station, the attendant placed the filling nozzle on top of the propane piping to hand the cylinder to the customer. The nozzle dropped. The impact with the ground reopened the control valve and resulted in an uncontrolled release of liquid propane. The dispenser lacked the required excess…...

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Another failure caused by improper torque

This fatal incident is another example of workers unknowingly understanding “torque values” when putting the primary containment system into service…. Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...

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Mexico City NG Gas Explosion

A truck carrying Natural Gas (called “pipas”) wrecked and leaked the gas, which then found an ignition source. (See video below) The explosion killed at least six (6) people and left 90 injured. Ten (10) have been discharged as of Wednesday morning. Footage of the aftermath showed some victims with severe burns across their bodies…...

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OSHA issues Serious Citation in PRCS Death for NOT performing “Freshair Setup” and “bump testing” meter

In a recent PRCS involving a fatality, one of the OSHGA citations issued under 1910.146(d)(4)(i) was related to not following the meter manufacturer’s use requirements related to “bump testing” the meter before each day’s use… 1910.146(d)(4)(i) Testing and monitoring equipment needed to comply with paragraph (d)(5) of this section; Text For Citation: 01 Item/Group: 002…...

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Analysis of Leak Testing Planning for Carbon Dioxide Piping Systems

This is an EXCELLENT document to help us understand the risks associated with pressure testing Carbon Dioxide (CO2) piping. It compiles all my previous posts on the need for and methods of pressure/leak testing our hazardous materials piping systems. Many people are skeptical of a redneck from Western KY on these matters, so I thought…...

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Leak Test Gone Bad (using oxygen as test media)

Polish Authorities have determined that the heat pump explosion that killed two people last year was caused by using oxygen to carry out a leak test. The heat pump explosion on August 20, 2024, killed two people: an engineer (30) who was servicing the unit and the property owner (45). They were said to have…...

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Pressure Testing Gone Bad (Fatality – Flange bolts not torqued properly)

On March 6, 2018, a 49-year-old pipefitter was hit in the chest by a pressurized 12-inch diameter polyvinyl chloride (PVC) pipe during a hydrostatic pressure test of a fire suppression system. The sudden pipe movement was attributed to a pipe joint connection failure in a buried section of the pipeline. The failure was due to…...

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Line Break Gone Bad (NG Fatality)

Natural gas was released into the basement of the Realty Building and caused an explosion in Youngstown, Ohio, after a member of a scrap removal crew cut into a steel pipeline. Although the cut pipeline had not been marked or otherwise identified as containing natural gas, it did contain gas, pressurized at about 38 psig,…...

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A hat tip to WorkSafe BC on their REVISED Toxic Process Gas (TPG) standard

WorkSafe BC (British Columbia) is proposing some thoughtful improvements to its Part 6, Substance Specific Requirements, sections 6.116 to 6.132 — Toxic Process Gases. The hazardous materials that this effort focuses on are: This standard reads much like OSHA’s PSM standard; however, this standard has a bit more specific requirements. Some Highlights of the proposed…...

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