Podcast
Questions and Answers
What type of safety relief valves are commonly used in potable water heaters and hot water storage tanks?
What type of safety relief valves are commonly used in potable water heaters and hot water storage tanks?
- ASME BPVC Section IV safety relief valves
- Pressure-only safety relief valves
- Temperature and pressure safety relief valves (correct)
- Temperature-only safety relief valves
What is the maximum allowable working pressure for the water heaters mentioned in the text?
What is the maximum allowable working pressure for the water heaters mentioned in the text?
- 200°C
- 1100 kPa (correct)
- 2200 kPa
- 99°C
Which standard is referred to in the text for safety relief valve requirements for industrial and commercial potable water heaters?
Which standard is referred to in the text for safety relief valve requirements for industrial and commercial potable water heaters?
- ASME BPVC Section IV, Part HLW-800.1
- ASME BPVC I, Part HLW
- ASME BPVC IV, Part HLW
- ASME BPVC Section IV, Part HLW-800 (correct)
What must the pressure setting of the safety relief valve be in relation to the maximum allowable working pressure of the water heater?
What must the pressure setting of the safety relief valve be in relation to the maximum allowable working pressure of the water heater?
What additional dangers do temperature and pressure safety relief valves protect against?
What additional dangers do temperature and pressure safety relief valves protect against?
What type of potable water is used in the heaters mentioned in the text?
What type of potable water is used in the heaters mentioned in the text?
What does ASME consider insufficient for vessel protection according to the text?
What does ASME consider insufficient for vessel protection according to the text?
What causes the pressure element of the temperature and pressure relief valve to open?
What causes the pressure element of the temperature and pressure relief valve to open?
What does the temperature sensitive element of the temperature and pressure relief valve consist of?
What does the temperature sensitive element of the temperature and pressure relief valve consist of?
What is recommended for T&P valves to receive annually according to the text?
What is recommended for T&P valves to receive annually according to the text?
Which type of temperature relief device employs a fusible element that allows hot water to escape when it melts at 99°C?
Which type of temperature relief device employs a fusible element that allows hot water to escape when it melts at 99°C?
What does the temperature-sensitive device do when it opens at 99°C?
What does the temperature-sensitive device do when it opens at 99°C?
According to HLW-801, where must the pressure relief valves be installed?
According to HLW-801, where must the pressure relief valves be installed?
What is the condition for installing the valve in the horizontal position with the outlet pointed down?
What is the condition for installing the valve in the horizontal position with the outlet pointed down?
"The combination temperature and pressure relief valve provides protection for both overpressurization, and dangerously high water temperatures" - what does this statement mean?
"The combination temperature and pressure relief valve provides protection for both overpressurization, and dangerously high water temperatures" - what does this statement mean?
The pressure setting for the relief valve(s) should be based on the component with the highest maximum allowable working pressure rating.
The pressure setting for the relief valve(s) should be based on the component with the highest maximum allowable working pressure rating.
Safety relief valves must be connected to an internal pipe in the water heater or a cold water feed line connected to the water heater.
Safety relief valves must be connected to an internal pipe in the water heater or a cold water feed line connected to the water heater.
ASME prohibits the installation of relief devices sensitive only to temperature.
ASME prohibits the installation of relief devices sensitive only to temperature.
The T&P valve operates with a pop action when over-pressurization occurs.
The T&P valve operates with a pop action when over-pressurization occurs.
Temperature relief devices must always have additional pressure relief.
Temperature relief devices must always have additional pressure relief.
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