In pressure vessel manufacturing codes (ASME Section VIII, Division 1 and IS 2825), UFPV stands for Unfired Pressure Vessel.
Refers to closed containers designed to operate under internal or external hydrostatic/pneumatic pressure without direct flame exposure (e.g., milk vacuum deaerators, air surge tanks, plate heat exchanger frames).
Conclusion: Unfired Pressure Vessel (Option 3).
Correct option: (3) Unfired Pressure Vessel
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