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    mamun khan's Avatar
    mamun khan Posts: 1, Reputation: 1
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    #1

    Jan 28, 2010, 04:30 AM
    Risk assessment of steam drum safety valve float test
    Please, let me know the risk involved in High pressure boiler (>105 bar) steam drum safety valve float testing
    nirmallya's Avatar
    nirmallya Posts: 1, Reputation: 1
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    #2

    Nov 3, 2011, 09:14 AM
    Generally on-line testing of high pressure steam drum safety valves is done by Trevi test process which applies hydraulic load on the spindle to calculate the opening pressure and adjust the spindle nut to set the valve at the correct pressure.
    The risks involved are:
    1.excessive noise when valve is opened/ popped.
    2.Chances of reduction in drum water level due to excessive blowdown or more time for which it remains open.
    3.Chances of mechanical damage to the pressure parts (like steam cut in).
    Thanks
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