Proposed changes to cconsider

  • Monday, April 15, 2024 4:55 PM
    Message # 13343750
    Mathis Carlson (Administrator)

    I was sent the following list of potential changes to discuss: * 

    If cylinders are received with wrappers obscuring identifying labels or stencils, the wrappers shall be removed prior to storage.

    AHJ are not allowing mesh or clear covers on cylinders those portions of the system intended to handle oxygen, or mixtures containing more than 23.5 percent oxygen at gauge pressures greater the 3000 kPa 435 psi, interconnecting hose shall contain no polymeric materials

    Allow for different mixtures those portions of systems intended to handle medical gases or mixtures of medical gas at gauge pressures of less than 300 kPa 435 psi, material construction shall be compatible with the  gas under the temperatures and pressures to which the components can be exposed in the containment and use.

    AHJ having issues with the nitrous oxide verbiage on manifold pigtails * 

    All positive-pressure supply systems shall be provided with means to control the final line pressure at the source with all the following characteristics:

    1.     (1)Shall be of a balanced design and able to maintain stable pressures within the limits of Table 5.1.11

    Allow the facility to maintain more consistent pressures from the manifolds as the tanks are depleting 

    EOSCs shall consist of the following:

    (8)*Four alarm connection points readily available at both master alarm panels to allow the temporary supply to be monitored while in use

    This will require wire to be pulled and terminated when the EOSC is used, interpretation could require additional unkneaded alarm points to be added to the system  The auxiliary connections shall be of the same size as the source valve

    Typically the source valve is smaller than the main line, if the source valve is 1” and the main is 6” the main will only flow as much as a 1” valve will allow.  This should be moved under to eliminate confusion between CFCSS verbiage (5)  Be provided with a sample port on the source side of the isolation valve of each dryer for maintenance.

    Clarification so the sample port is not considered the individual sample port Medical Air Quality Monitoring.

    (2)Carbon monoxide shall be monitored and shall activate a local alarm and all master alarms when the CO level exceeds 10 ppm. [See]

    The CO level is just as important as the dew point, it should be monitored in the same manner Vacuum Filtration.

    Central supply systems for vacuum other than liquid ring pumps shall be provided with inlet filtration with the following characteristics:

    Omit other than liquid ring pumps, the liquid rings have more of a chance of biological growth due to the warm moist nature of these systems It is installed so that a permanently fixed separator intervenes between the valve and the outlets/inlets that is controls.

    Need to change verbiage, AHJs not allowing doors as a wall * 

    A zone valve in each medical gas and vacuum line shall be provided for each Category 1 space and be located as follows:

    Remove 1 after category Understanding that currently a category 2 can be feed from a category 1, separate valves for different categories.

    1.     (2)In anesthetizing locations, they shall be installed immediately outside each rooms doorway.

    Immediately outside can be interrupted as on the outside wall of the room that is remote from the exit Auxiliary Source Connection.

    Should the Auxiliary connections be moved hear to keep all valves in the same area 

    Where installed in a down-facing position, such as in a hose drop, ceiling, or ceiling column, station outlets/inlets shall be D.I.S.S. connectors.

    Hose drops are common and pose the same risk facing down 

    Manufactured assemblies employing hose or flexible connectors, where the station outlet/inlet attached to the piping is not fully and immediately accessible (i.e., cannot be manipulated without the removal of panels, doors, and so forth), shall have station outlets/inlets with the following additional characteristics:

    1.     (1)They shall be gas-specific connections with positive locking mechanisms that ensure the connector is firmly seated and cannot detach without intentional actuation of the release (e.g., D.I.S.S. connectors).

    2.     (2)In pressure gases, they shall be permitted to omit the secondary valve (or assembly) required in

    • 1.       In pressure gasses installed in zones compliant with they shall be permitted to omit both primary and secondary vales (or assemblies) to minimum restriction to flow.

    The check valves are unnecessary in these locations and add additional restriction in flow, ZVB can be closed for maintenance

   Master alarm panels (EOSC EOSC calls for alarm points on master alarms, not listed on master alarms Area alarms shall be located in a location that will provide surveillance.

    Nurse ‘s station or similar location is not practical in many situations.  Topic for discussion, I have always been told we are aloud to do this because during a case the system is being monitored by an antitheologies and there are alarms on the anesthesia machine.  My concern is the vacuum and WAGD systems, those are not alarmed on the anesthesia machine and in the case of failure would allow free flowing of anesthetizing gas into the anesthetizing location. Protection of Piping.

    Piping shall be protected against corrosion and physical damage. 

    Remove freezing.  Every CFCSS has exposed piping that is subject to freezing, issues with AHJ on O2 line ran on the outside of buildings. 

    The filter shall not accrue excessive matter or discoloration from any outlet tested.

    The filters will come back lighter than when they go out with noticeable debris. 

    The test shall be performed with the use of oil-free, dry nitrogen NF.

    Remove this statement, contradicts (5) 

    The Twenty-five percent of the zones most remote from the source shall be tested for total nonmethane hydrocarbons and halogenated hydrocarbons and compared to the source gas.

    We require 25% on the particulate. Operational Flow Pressure Drop Test.

    Operational flow pressure drop tests shall be performed at each station outlet/inlet or terminal where the user makes connections and disconnections. Test shall be performed with a meter calibrated to LPM/CFM air. 

    Tests shall be performed with the gas of system designation or the operating vacuum. 

    All gas outlets with a gauge pressure of 345 kPa (50 psi), including, but not limited to, oxygen, nitrous oxide, medical air, and carbon dioxide, shall deliver 100 LPM (3.5 CFM) with a pressure drop of not more than 35 kPa (5 psi) and static pressure of 345 kPa to 380 kPa (50 psi to 55 psi). 

    Medical support gas outlets shall deliver 140 LPM (5.0 CFM) with a pressure drop of not more than 35 kPa (5 psi) gauge and static pressure of 1100 kPa to 1275 kPa (160 psi to 185 psi) gauge. 

    Medical–surgical vacuum or WAGD inlets shall draw 85 Nl/min (3 CFM) without reducing the vacuum pressure below 300 mm (12 in.) gauge HgV at any adjacent station inlet. 

    Oxygen and medical air outlets serving Category 1 spaces shall allow a transient flow rate of 170 LPM (6 CFM) for 3 seconds and a pressure drop of not more than 70 kPa (10 psi) gauge.

    Industry standard is using an acrylic air flow meter reading in LPM/CFM.

    Adding WAGD to the vacuum, typically the WAGD is produced by the medical surgical vacuum. Medical Air Compressor Systems


    A demand of approximately 25 percent of the rated compressor capacity shall be created to cause the compressors to cycle on and off continuously and the dryers to operate for the 4-hour period.

    Typically, systems are passing the air quality test in less than an hour, the addition run time is not required.  The 4 hour test would allow the system to be started and tested in the same day. Local Signals.


    The following nitrogen NF central supply systems shall have local signals located at the source equipment:

    (1)Manifolds for gas cylinders without reserve supply (see *  Manifolds for Gas Cylinders.

    (2)Manifolds for cryogenic liquid containers (see *  Manifolds for Cryogenic Liquid Containers

    (3)Cryogenic fluid central supply systems (see Cryogenic Fluid Central Supply Systems Operation Nitrogen NF Manifolds for Gas Cylinders.

    Manifolds for gas cylinders shall be in accordance with and shall meet the requirements of Nitrogen NF Manifolds for Cryogenic Liquid Containers.

    Manifolds for cryogenic liquid containers shall be in accordance with and shall meet the requirements of Nitrogen NF Cryogenic Fluid Central Supply Systems.

    Cryogenic fluid central supply systems shall be in accordance with and shall meet the requirements of

  • Thursday, May 02, 2024 8:14 AM
    Reply # 13351204 on 13343750

    I submitted the following PI's

    2 files

16339 Kranker Drive, Stilwell, KS 66085