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    Rupture Disk Sizing

    Uploaded by

    abhishek shinde
    The document provides sizing calculations for a rupture disk protecting a steam outlet from a separator. The maximum flow rate is 638,231.70 lb/hr at a maximum temperature of 415.4°F and maximum pressure of 295.88 psia. Using the given design data and equations from API RP 520, the minimum required discharge area is calculated to be 56.16 in^2. The minimum inlet diameter of the rupture disk is calculated to be 8.46 in, but a 10 in diameter disk is selected.

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    Rupture Disk Sizing

    Uploaded by

    abhishek shinde
    197 views2 pages
    The document provides sizing calculations for a rupture disk protecting a steam outlet from a separator. The maximum flow rate is 638,231.70 lb/hr at a maximum temperature of 415.4°F and maximum pressure of 295.88 psia. Using the given design data and equations from API RP 520, the minimum required discharge area is calculated to be 56.16 in^2. The minimum inlet diameter of the rupture disk is calculated to be 8.46 in, but a 10 in diameter disk is selected.

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    Rupture disc sizing

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    rupture-disk-sizing

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    The document provides sizing calculations for a rupture disk protecting a steam outlet from a separator. The maximum flow rate is 638,231.70 lb/hr at a maximum temperature of 415.4°F and maximum pressure of 295.88 psia. Using the given design data and equations from API RP 520, the minimum required discharge area is calculated to be 56.16 in^2. The minimum inlet diameter of the rupture disk is calculated to be 8.46 in, but a 10 in diameter disk is selected.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    197 views2 pages

    Rupture Disk Sizing

    Uploaded by

    abhishek shinde
    The document provides sizing calculations for a rupture disk protecting a steam outlet from a separator. The maximum flow rate is 638,231.70 lb/hr at a maximum temperature of 415.4°F and maximum pressure of 295.88 psia. Using the given design data and equations from API RP 520, the minimum required discharge area is calculated to be 56.16 in^2. The minimum inlet diameter of the rupture disk is calculated to be 8.46 in, but a 10 in diameter disk is selected.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    of 2

    Rupture Disk Sizing

    Based on: API RP 520 Part 1 - Sizing and Selection of Pressure-Relieving Devices in Refineries, 2000 ed.

    I. DESIGN DATA

    Fluid service : Production steam


    Unit service : Steam oulet from separator
    Max. flow rate W = 638,231.70 lb/hr = 289.50 t/hr
    Max. (design) temperature T = 415.40 oF = 213.00 oC
    Max. pressure (MAWP)/setting pressure P = 295.88 psia = 20.40 bara
    Back pressure PB = 14.50 psia = 1.00 bara
    Relieving pressure = (1.1 x MAWP) + PB P1 = 355.92 psig = 24.54 barg

    II. CALCULATION

    Rupture disk sizing for steam service (US customary units)


    calculated in accordance with equation below :

    W , Eq. 01 (see para. 3.7.1)


    A = 51.5 x P1 x KD KB KC KN KSH

    where,
    A = required effective discharge area, in2
    W = required flow rate, lb/hr
    P1 = upstream relieving pressure, psia.
    This is the set pressure + the allowable overpressure plus the atmospheric pressure.
    KD = effective coefficient of discharge (0.62 for Rupture Disc Devices).
    KB = capacity correction factor due to back pressure (1 for conventional valves)
    KC = combination correction factor for installations with a rupture disk upstream of the pressure relief valve (negligible)
    KN = correction factor for Napier equation
    = 1.0 where P1 ≤ 1500 psia
    0.1906 P1 - 1000
    =
    0.2292 P1 -1061
    KSH = superheat steam correction factor (1 for saturated steam at any pressure)
    Minimum discharge area A = 56.16 in.2 = 36,231.93 mm2

    Min. inlet diameter (ID) of rupture didk D= 8.46 in. = 207.17 mm


    Min. inlet diameter (ID) of rupture didk (selected) D= 10.00 in. = 245.00 mm

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