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What is the maximum pressure at which the safety valves for a steam boiler should discharge?
What is the maximum pressure at which the safety valves for a steam boiler should discharge?
What is the smallest size of safety valve allowed for a steam boiler as per the ASME Code?
What is the smallest size of safety valve allowed for a steam boiler as per the ASME Code?
What is the requirement for the body drain connections of safety valves and safety relief valves?
What is the requirement for the body drain connections of safety valves and safety relief valves?
What is the maximum allowable pressure rise with the fuel burning equipment installed and operated at maximum capacity?
What is the maximum allowable pressure rise with the fuel burning equipment installed and operated at maximum capacity?
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Which type of safety valve is required for each steam boiler as per ASME Code?
Which type of safety valve is required for each steam boiler as per ASME Code?
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What is the largest size of safety valve allowed for a steam boiler under ASME Code?
What is the largest size of safety valve allowed for a steam boiler under ASME Code?
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Where must safety valves and safety relief valves be installed?
Where must safety valves and safety relief valves be installed?
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What is the requirement for the location of safety valves and safety relief valves?
What is the requirement for the location of safety valves and safety relief valves?
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What is the requirement for the discharge pipe of the safety valve?
What is the requirement for the discharge pipe of the safety valve?
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What is a characteristic of low-pressure safety valves?
What is a characteristic of low-pressure safety valves?
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What type of action should safety relief valves have when tested by steam?
What type of action should safety relief valves have when tested by steam?
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What should not be placed between the safety or safety relief valve and the boiler, or on discharge pipes between these valves and the atmosphere?
What should not be placed between the safety or safety relief valve and the boiler, or on discharge pipes between these valves and the atmosphere?
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What must be done if a long vertical discharge pipe is required for a safety valve?
What must be done if a long vertical discharge pipe is required for a safety valve?
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What is a characteristic of safety relief valves compared to safety valves?
What is a characteristic of safety relief valves compared to safety valves?
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What should never be done under any circumstances with a pressure relief valve?
What should never be done under any circumstances with a pressure relief valve?
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What could be a cause for frequent safety relief valve operation in a hot water heating system?
What could be a cause for frequent safety relief valve operation in a hot water heating system?
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What should be done if scale, corrosion products, or chemical residue accumulations affect the operation of a safety relief valve?
What should be done if scale, corrosion products, or chemical residue accumulations affect the operation of a safety relief valve?
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What should not be present at any time in a hot water heating system according to the text?
What should not be present at any time in a hot water heating system according to the text?
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Study Notes
Safety Valves and Safety Relief Valves for Steam Boilers
- The maximum pressure at which safety valves for a steam boiler should discharge is not specified, as it depends on the boiler's design and operation.
- The smallest size of safety valve allowed for a steam boiler as per the ASME Code is not specified, as it depends on the boiler's capacity and design.
Installation and Location Requirements
- Safety valves and safety relief valves must be installed in a way that allows easy access for inspection and maintenance.
- They must be located as close as possible to the boiler, and not in a location where they can be damaged by water or steam.
- Body drain connections of safety valves and safety relief valves must be installed to prevent accumulation of sediment or scale.
Operation and Performance Requirements
- The maximum allowable pressure rise with the fuel burning equipment installed and operated at maximum capacity is not specified, as it depends on the boiler's design and operation.
- ASME Code requires that each steam boiler have a specific type of safety valve, but the exact type is not specified.
- Safety relief valves must have a direct spring-loaded pop-action when tested by steam.
- Low-pressure safety valves are characterized by their ability to operate at lower pressures.
Discharge Pipe Requirements
- Discharge pipes of safety valves must be installed to avoid any restrictions or obstructions.
- If a long vertical discharge pipe is required for a safety valve, it must be supported at intervals to prevent sagging.
- Nothing should be placed between the safety or safety relief valve and the boiler, or on discharge pipes between these valves and the atmosphere, as this can cause restrictions or obstructions.
Operating Considerations
- Frequent safety relief valve operation in a hot water heating system can be caused by factors such as incorrect system design, improper installation, or inadequate maintenance.
- If scale, corrosion products, or chemical residue accumulations affect the operation of a safety relief valve, they must be removed or cleaned.
- It is never acceptable to block or disable a pressure relief valve under any circumstances.
- At no time should air be present in a hot water heating system according to the text.
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Description
Test your knowledge of the ASME Section IV requirements for pressure relief valves and devices used in heating boilers. This quiz covers the construction, code requirements, and operation of safety relief valves as per ASME BPVC Section IV rules.
