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    IMG - 0171 PSME Code 2008 162b

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    1) Refrigerant vessels must be protected by pressure relief devices to prevent rupture. The minimum required discharge capacity of these devices is determined by a formula based on the vessel's diameter and length. 2) Pressure relief devices must be tested to ensure they function at a pressure no more than 10% above their marked pressure setting. 3) All pressure relief valves must be set and sealed by the manufacturer, and marked with information including the manufacturer name, pressure setting, and discharge capacity.

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    IMG - 0171 PSME Code 2008 162b

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    let ram
    15 views1 page
    1) Refrigerant vessels must be protected by pressure relief devices to prevent rupture. The minimum required discharge capacity of these devices is determined by a formula based on the vessel's diameter and length. 2) Pressure relief devices must be tested to ensure they function at a pressure no more than 10% above their marked pressure setting. 3) All pressure relief valves must be set and sealed by the manufacturer, and marked with information including the manufacturer name, pressure setting, and discharge capacity.

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    IMG_0171 PSME Code 2008 162b

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    1) Refrigerant vessels must be protected by pressure relief devices to prevent rupture. The minimum required discharge capacity of these devices is determined by a formula based on the vessel's diameter and length. 2) Pressure relief devices must be tested to ensure they function at a pressure no more than 10% above their marked pressure setting. 3) All pressure relief valves must be set and sealed by the manufacturer, and marked with information including the manufacturer name, pressure setting, and discharge capacity.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
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    15 views1 page

    IMG - 0171 PSME Code 2008 162b

    Uploaded by

    let ram
    1) Refrigerant vessels must be protected by pressure relief devices to prevent rupture. The minimum required discharge capacity of these devices is determined by a formula based on the vessel's diameter and length. 2) Pressure relief devices must be tested to ensure they function at a pressure no more than 10% above their marked pressure setting. 3) All pressure relief valves must be set and sealed by the manufacturer, and marked with information including the manufacturer name, pressure setting, and discharge capacity.

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    of 1

    AND AIRGONDITIONING

    CHAPTER 8 - HEATING, VENTILATTNG, REFRIGERATION


    discharge capacity determined by test wiEt
    c. Refrigerant containing vessels which are not
    the outlet open to the atmosphere and with
    a pai of equipment listed by a recognized
    a differential pressure across the restraining
    engineering 'testing laboratory having a
    member equalto twice the marked pressure
    foli6w-up inspection service shall be
    setting of the pressure relief valve'
    constructed in accordance with the rules of
    Chapter 7 (Unifled Pressure Vessel)' of
    b. The rated discharge capacity rupture
    members and discharge piping shall be as
    d. Every systems, except as ptovided in given in Table 8.6'
    Sections'10,V.d., 11.A and 11'B, shall be
    protected by a pressure relief device unless
    so constructed that pressure due to fire 11.7 Required CaPacitY
    conditions will be relieved safely by soldered
    joints, lead gaskets, fusible plugs, or their a. The minimum required rated discharge
    capacity of pressure relief device for a
    Parts of the sYstem. refrigerlnt containing vessels shall be
    deteimined by the following formula:
    Section 11.0 Pressure Relief Devices
    C=fDL
    11.1 Each pressure vessel containing liquid
    may be shut off by valves
    refrigerant and which
    Where C = Minimum required rated
    from all other parts of a refligerating system' discharge capacity oT the relief device in kg of
    shall be protected by an approved pressure air per minute.
    relief valve in parallel with a rupture member or
    a second appioved pressure relief"valves if its D = Outside diameter of the vessel
    gross volume exceeds 0.142 m" unless its in mm.
    diameter does not exceed 152 mm'
    L- Length of the vessel in mm'
    11.2 Each pressure vessel having a gross volume of
    0.142 mt or less, containing liquid refrigerant f - Factor dePendent uPon kind of
    and which may be shut off by valves from all refrigerant as follows:
    other parts of a refrigerating system, shall be
    protecied by an approved pressure relief device Refrigerant Value of "f'
    Kind of
    or an aPProved fusible Plug.
    Ammonia(NH3) 0'041
    Dichlorodifluoromethane,(R-12,R'22) 0'1 63
    11.3 The requirements of Section 10'Vd and 1'1
    R-134a, R500
    shall noi apply to-iflooded evaporators located in
    a refrigerator c*a binet.
    11.8 Pressure Setting Test
    11.4 Each pressure vessel shall have the Design a. The pressure setting of relief devices for
    Working Pressure stamped thereon if its gross refrigerant containing vessels shall be tested
    volume exceeds 0.1 42 m" -
    with the outlet open to the atmosphere and
    the relief device shall function at a pressure
    11.5 Compressors operating above 103'35 kPa not more than ten (10) percent above the
    qauqe and having a displacement exceeding pressure marked thereon, if such marking is
    I.gi ,t per minute shall be equipped by the- bAg tpa or more, qr at not more than 6839
    manufacturer with a pressure relief device of kPa above the pressure marked thereon' if
    adequate size to prevent rupture of the such marking is less than 689 kPa'
    compressor, located between the compressor
    and stop valve on the discharge side' The 11.9 Marking
    discharge from such relief device may be vented
    to the atmosphere or into the low pressure side a. All pressure relief valves for refrigerant
    of the sYstems' containing vessels shall be set and sealed
    by the minufacturer. The name or trade of
    11.6 CaPacitY Rating the manufacturer, the pressure setting
    expressed in kPa, the rated discharge
    a. The rated discharge capacity of a pressure capacity expressed in kilogram of a.ir per
    relief valve, expressed in points of air per minute, and the minimum equivalent length
    minute shall be one-fifth (1/5) of its

    164

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