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PRD failure on Indianapolis refuse truck

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  • #16
    WLWT Oct 4, 2019 - Firefighters forced to let garbage truck fueled by natural gas burn instead of dousing flames

    Firefighters had to go against every fiber of their instincts and let a Rumpke truck burn because putting water on it could have created an explosion. "There are safety devices on there that need to be addressed to keep the truck from having a catastrophic failure," said Rumpke regional manager of maintenance Nick Brayton.

    The commercial garbage truck is fueled by four cylinders filled with compressed natural gas, company officials said. The cylinders have safety valves that are triggered by heat or pressure and release the gas safely in the event of a fire. “The idea is with the safety valve is if there’s enough heat or pressure in the cylinder, the safety valve will deploy the gas into the atmosphere," Brayton said. Putting water on the fire could cause the cylinders to explode. So, firefighters had to wait for the safety valves to engage. It took about two hours. No injuries were reported when the garbage truck caught fire Friday morning in Harrison, Ohio.

    https://www.wlwt.com/article/garbage...ison/29366873#
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    • #17
      Maggy Mcdonel for Fox19Now Jul 9, 2021 -Fireworks cause garbage truck fire in West Chester

      WEST CHESTER TOWNSHIP, Ohio (WXIX) - The fire broke out 9 Jul 2021 in a residential garbage truck around 4 a.m. on Tylersville Road in West Chester, according to Rumpke.

      They say the driver was, fortunately, able to pull into an empty parking lot and dump the garbage so the fire department could extinguish it.

      Bridgett Biggs, Rumpke safety manager said, "Fireworks can be disposed of if they have been soaked in water before being thrown away."

      (Note: This is the EXACT way a refuse company tries to handle a truck fire - all refuse companies will say this happens several times annually. Brief view of truck in video does not confirm it was a CNG refuse truck. But Rumpke has been fueling its Greater Cincinnati CNG fleet at 3700 Struble Rd,,Colerain,OH - 20 min from incident - since 2014 - so it is likely CNG trucks handle this part of town.)

      https://www.fox19.com/2021/07/09/fir...-west-chester/
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      • #18
        Robert Rielage for firerescue1.com updated 27 June 2017 - Case study: What fire chiefs must know about CNG trucks

        Several organizations have brought the growing issue where both propane and natural gas-fueled vehicles have initially caught firefighters unaware. The Indianapolis Fire Department experienced such an event in 2015, and has gone to great lengths to both research what happened and provide insight gained through their experience. I spoke to Capt. James King of the IFD's training division about the incident.

        In the predawn hours of Jan. 27, 2015, IFD received a 911 call and, on arrival, discovered a well-involved fire involving a Republic Services garbage truck. On arrival, the engine company officer requested that the trash truck driver drop the load in the street. But for whatever reason, the driver wouldn't comply with this request.

        The engine company crew took a supply line and initially pulled 1¾-inch lines to attack the fire, when the driver of the truck informed the fire crew that the "gas tanks" were located on the top of his truck. This was the first indication that the vehicle was fueled by something other than diesel fuel. The engine officer requested a ladder truck be dispatched and that unit placed an elevated stream into operations in an attempt to cool the rooftop fuel tanks.

        Less than 15 minutes from the engine's arrival, several of the rooftop tanks filled with CNG BLEVEied, spraying shrapnel in a 360-degree pattern and striking one firefighter in the helmet with a force that knocked him to the ground. One of the tanks traveled a quarter mile and landed about 40 feet in the front of an elementary school. The garbage truck sustained considerable damage from both the fire and the resulting blast.

        Additional units, including a hazmat unit, battalion chief and safety officer, were dispatched following the explosion. The incident was terminated approximately two hours after the initial call, but prompted an extensive follow-up investigation that resulted in the SIIT report which determined that the water cooled the pressure-relief valves to a temperature where they did not activate, which allowed the pressure within the tanks to increase to a point where they ruptured close to the center point of each tank.

        The IFD report listed these 12 significant lessons learned from this incident.

        In an incident with a confirmed CNG vehicle, insist that the driver dump the load.
        Extinguish the refuse using an unmanned deck gun or unmanned master stream.
        Secure a 500-yard area in all directions.
        Positioned personnel behind apparatus as a shield after critical functions have been completed.
        The normal response of cooling fuel tanks for fear of BLEVE will most likely not work.

        Ironically, on March 23, 2015, Indianapolis' neighboring Fishers Fire Department had a similar fire involving another CNG-powered Republic Services truck. Upon its discovery, the truck driver immediately dumped the load and pulled the vehicle away from the fire. Firefighters quickly handled the dumped load and small fire remaining in the vehicle without incident thanks to following these IFD guidelines.

        https://www.firerescue1.com/fire-pro...hDjh7LxCG5HjM/

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        • #19
          CTIF 10 Jun 2019 - How safe are bio gas vehicles for firefighters?

          A biogas bus at Skånetrafiken in Malmö was completely destroyed by a fire on Tuesday May 28. The bus had no passengers at the moment. Only the driver was on board, and he was not injured.

          According to the emergency services, there was no risk of explosion as the gas fuses melted out as they are designed to do. The bus, which is owned by Nobina, was completely burned out. It was a Volvo CNG bus.

          Swedish media have posted videos that show the dramatic fire development. On SvT Skåne's film, you can see how a violent flame strikes out sideways, 5-6 meters from the bus when one of the safety valves is released.

          On the SR P4 Malmöhus film, which you can find here , you can see how some safety valves release with a flame upwards, and a valve releases laterally.

          https://ctif.org/index.php/news/how-...olving-cng-bus

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