Pressure Vessels Flashcards
How can an HP boiler be used for LP heating application?
Reducing the pressure
What is another name for a flash tank?
Flash steam separator
What is the maximum working pressure for an LP boiler?
15 psi or 10 7 KPA
What temperature does ASME section one define HTHW to be?
121°C or 250°F
Where did temperatures for HTHW systems usually operate?
Between 171°C – 232°C or 350°F – 450°F
Fired pressure vessels obtain heat source in what form? Direct or indirect?
Direct
What pressure applies to HTHW boilers?
160 psi and over
What section of the ASME code applies to LTHW boilers?
ASME section VIII
What type of pressure vessel gets heat from an indirect source?
Unfired pressure vessel
What is the maximum diameter classification for category H fittings?
Less than 6 inches
What ASME codes cover the piping system on an HTHW boiler?
ASME B31.1 and B31.3
A hot water storage tank heated by steam has a maximum capacity of:
A. 450 L
B. 451 L
C. 400 L.
A. 450 L or 120 US gallons
HP boilers are designed for process only, true or false?
False
Where does flash steam get heat from?
A. High-pressure steam.
B. High-pressure condensate.
C. Low pressure condensate.
D. Pressure steam.
B. High-pressure condensate
What ASME section covers pressure vessels greater than 42.5 L?
ASME section VIII
A pressure relief valve is designed to relieve vapor. True or false?
False
Vessels serving as a cushion tank with a capacity of 454 L or less, are not covered by ASME section I. True or false?
True
What is a pressure relief device designed to do?
A. Open proportionately after operation.
B. Open Rapidly during operation.
C. Re-close after operation.
C. Reclose after operation.
What is a rupture disc activated by?
Inlet static pressure
All pressure vessels within the scope of a SME section VIII shall be provided with an over pressure protection? True or false
True
Should a safety pop valve be located in the liquid space of the pressure vessel or the vapour space of the pressure vessel?
In the vapour space of the pressure vessel
What must the minimum inlet size be when two or more pressure relieving devices are placed on one outlet of the pressure vessel?
Combined area of the inlets of the relief devices
