EOSC Clearances

  • Wednesday, September 19, 2018 9:56 AM
    Message # 6676692

    NFPA 99-2012, section (7) states: EOSCs shall consist of… “Minimum of 1 m (3 ft) of clearance around the EOSC for connection of temporary auxiliary source.”

    Does this mean on all sides, including elevations, as in the connection must be 3’ above finished grade? Or does this mean a service clearance of 3’ in front of the EOSC?

  • Thursday, September 20, 2018 1:25 AM
    Reply # 6677774 on 6676692

     3 feet around or on all sides of the EOSC to be able to make connections. My personal opinion is it’s nowhere close to being enough room.  There also has to be Clarence for emergency vehicles to access it. 

    Last modified: Thursday, September 20, 2018 1:33 AM | Don Holden
  • Thursday, September 20, 2018 7:21 AM
    Reply # 6680093 on 6676692

    Jill I think it is great that you asked this question early in the design process. Not only do you need to consider the clearance around the connection but the location of the EOSC. I have seen the EOSC near receiving areas and Emergency areas. If this is a small facility where the supplier is going to use portable cylinders (high pressure or Dewars) this is not a problem. For larger facilities where the temporary system is installed on a flatbed truck I have seen several common problems such as; shutting down the receiving areas, blocking vehicle access to the emergency areas, and extremely long temporary piping runs between the EOSC and the temporary unit. These larger temporary systems are usually over 20k/scf of product. This means the selected site needs to comply with the exposure hazard requirements in chapter 9 of NFPA 55.

  • Friday, September 21, 2018 7:25 AM
    Reply # 6686012 on 6676692
    Al Moon (Administrator)

    EOSC - Emergency Oxygen Supply Connection


    This requirement has been listed within the NFPA Standard,

    as far back as Edition 1983 NFPA 56F Section # 2-5 Page 21 - Figure 2-5.1


    WOW and YES


    35 Years Ago 

    Last modified: Friday, September 21, 2018 7:26 AM | Al Moon (Administrator)

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