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Questions and Answers
What are boiler outlet connections?
What are boiler outlet connections?
- Connections for electrical wiring in a boiler drum
- Connections for fuel supply to the boiler
- Connections for air ventilation in the boiler
- Tapings in a boiler drum or shell for connecting external piping and fittings (correct)
According to ASME B 31.1, which piping falls under its technical jurisdiction?
According to ASME B 31.1, which piping falls under its technical jurisdiction?
- Piping for electrical connections
- Piping for air ventilation
- Boiler external piping up to the first or second valve (correct)
- Boiler internal piping
What are the requirements specified by ASME B31.1 when multiple boilers are connected to a common header?
What are the requirements specified by ASME B31.1 when multiple boilers are connected to a common header?
- Each boiler should have a single stop valve with a drain
- Each boiler should have three stop valves connected
- Each boiler with a manhole opening should be fitted with two stop valves having an ample free-blow drain between them (correct)
- Each boiler should have a single stop valve without a drain
What is the purpose of the boiler outlet connections?
What is the purpose of the boiler outlet connections?
Which type of boiler requires a manhole for inspections and maintenance?
Which type of boiler requires a manhole for inspections and maintenance?
What is required for the required steam shut-off valves in the steam line according to ASME BPVC I?
What is required for the required steam shut-off valves in the steam line according to ASME BPVC I?
Which type of boilers require two slow-opening blowoff valves if the allowable working pressure is over 100 psig?
Which type of boilers require two slow-opening blowoff valves if the allowable working pressure is over 100 psig?
What is required in the feedwater line to a boiler according to ASME B31.1?
What is required in the feedwater line to a boiler according to ASME B31.1?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
Which type of valves are commonly used on the steam outlet of a boiler?
Which type of valves are commonly used on the steam outlet of a boiler?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
What is the purpose of blowdown valves in low-pressure steam boilers?
What is the purpose of blowdown valves in low-pressure steam boilers?
Why is it recommended to use outside screw and yoke valves with rising spindles for a DN 50 (2” NPS) or larger steam outlet?
Why is it recommended to use outside screw and yoke valves with rising spindles for a DN 50 (2” NPS) or larger steam outlet?
What is the minimum pressure rating required for valves used to blowoff or drain low-pressure steam boilers according to ASME BPVC IV Part HG-715(a)?
What is the minimum pressure rating required for valves used to blowoff or drain low-pressure steam boilers according to ASME BPVC IV Part HG-715(a)?
According to ASME BPVC IV Part HG-703.2, what does the return (or Hartford) loop prevent?
According to ASME BPVC IV Part HG-703.2, what does the return (or Hartford) loop prevent?
What is the purpose of a stop valve or cock installed upstream or downstream of the check valve in pumped return systems?
What is the purpose of a stop valve or cock installed upstream or downstream of the check valve in pumped return systems?
According to ASME B31.1, which piping falls under its technical jurisdiction?
According to ASME B31.1, which piping falls under its technical jurisdiction?
What are the requirements for boiler outlet connections?
What are the requirements for boiler outlet connections?
According to ASME B31.1 122.1.7 (A3), what is required when two or more boilers are connected to a common header?
According to ASME B31.1 122.1.7 (A3), what is required when two or more boilers are connected to a common header?
Why is it often necessary to consult both ASME B31.1 and ASME BPVC I?
Why is it often necessary to consult both ASME B31.1 and ASME BPVC I?
What is required in the feedwater line to a boiler according to ASME B31.1?
What is required in the feedwater line to a boiler according to ASME B31.1?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
According to ASME B31.1, what must be present in the branch to each boiler when multiple boilers are fed from a common source?
According to ASME B31.1, what must be present in the branch to each boiler when multiple boilers are fed from a common source?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
What does the return (or Hartford) loop prevent according to ASME BPVC IV Part HG-703.2?
What does the return (or Hartford) loop prevent according to ASME BPVC IV Part HG-703.2?
What are the requirements specified by ASME B31.1 when multiple boilers are connected to a common header?
What are the requirements specified by ASME B31.1 when multiple boilers are connected to a common header?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
What is the purpose of a stop valve or cock installed upstream or downstream of the check valve in pumped return systems?
What is the purpose of a stop valve or cock installed upstream or downstream of the check valve in pumped return systems?
What is the purpose of blowdown valves in low-pressure steam boilers?
What is the purpose of blowdown valves in low-pressure steam boilers?
Which type of valves are commonly used on the steam outlet of a boiler?
Which type of valves are commonly used on the steam outlet of a boiler?
What is required for the required steam shut-off valves in the steam line according to ASME BPVC I?
What is required for the required steam shut-off valves in the steam line according to ASME BPVC I?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
What is the minimum pressure rating required for all stop valves according to ASME BPVC IV Part HG-705(b)?
What is the minimum pressure rating required for all stop valves according to ASME BPVC IV Part HG-705(b)?
What is the recommended valve type for a DN 50 (2” NPS) or larger steam outlet according to the text?
What is the recommended valve type for a DN 50 (2” NPS) or larger steam outlet according to the text?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
What type of valve shall be installed near the boiler feedwater pipe according to ASME BPVC IV Part HG-705(a)?
What type of valve shall be installed near the boiler feedwater pipe according to ASME BPVC IV Part HG-705(a)?
What does the return (or Hartford) loop prevent according to ASME BPVC IV Part HG-703.2?
What does the return (or Hartford) loop prevent according to ASME BPVC IV Part HG-703.2?
What is the purpose of bottom blowoff connections according to ASME BPVC IV Part HG-715(a)?
What is the purpose of bottom blowoff connections according to ASME BPVC IV Part HG-715(a)?
According to ASME BPVC IV Part HG-715(a), what is the minimum required safety valve capacity for blowoff piping and valve size of 225 to 550 kg/hr?
According to ASME BPVC IV Part HG-715(a), what is the minimum required safety valve capacity for blowoff piping and valve size of 225 to 550 kg/hr?
Why are blowdown valves installed in low-pressure steam boilers?
Why are blowdown valves installed in low-pressure steam boilers?
Which type of boilers have the blowoff connection at the bottom of each water leg?
Which type of boilers have the blowoff connection at the bottom of each water leg?
What is required for all stop valves in terms of temperature rating according to ASME BPVC IV Part HG-705(b)?
What is required for all stop valves in terms of temperature rating according to ASME BPVC IV Part HG-705(b)?
What is recommended for the threaded part of the spindle in outside screw and yoke valves with rising spindles?
What is recommended for the threaded part of the spindle in outside screw and yoke valves with rising spindles?
What is the minimum pressure rating required for valves used to blowoff or drain low-pressure steam boilers according to ASME BPVC IV Part HG-715(a)?
What is the minimum pressure rating required for valves used to blowoff or drain low-pressure steam boilers according to ASME BPVC IV Part HG-715(a)?
Why is it recommended to use outside screw and yoke valves with rising spindles for a DN 50 (2” NPS) or larger steam outlet?
Why is it recommended to use outside screw and yoke valves with rising spindles for a DN 50 (2” NPS) or larger steam outlet?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
According to ASME BPVC IV Part HG-705(a), where should the feedwater not be introduced?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
What is the purpose of the check valve in the feedwater line according to ASME BPVC IV Part HG-705(a)?
According to ASME BPVC IV Part HG-703.2, what does the return (or Hartford) loop prevent?
According to ASME BPVC IV Part HG-703.2, what does the return (or Hartford) loop prevent?
What is the purpose of blowdown valves in low-pressure steam boilers?
What is the purpose of blowdown valves in low-pressure steam boilers?
What are the requirements for boiler outlet connections?
What are the requirements for boiler outlet connections?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
Why should bottom blowoff connections be connected to the lowest water space according to ASME BPVC IV Part HG-715(a)?
According to ASME B31.1, which piping falls under its technical jurisdiction?
According to ASME B31.1, which piping falls under its technical jurisdiction?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
What must be present in the branch to each boiler when multiple boilers are fed from a common source?
Study Notes
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Boiler #1: Small steam drum, only equipped with a handhole.
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Boiler #2: Larger shell, requires a manhole for inspections and maintenance.
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Due to connection to a common steam header, Boiler #2 requires block and bleed valves in the steam line.
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If Boiler #1 had a manhole, it too would need a block and bleed system.
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Steam Line Stop Valves and Drains (ASME BPVC I): Required steam shut-off valves must be equipped with a position indicator.
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Feedwater Piping (ASME B31.1): Each feedwater line to a boiler is required to have a check valve and a stop valve.
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When multiple boilers are fed from a common source, a globe or regulating valve is required in the branch to each boiler.
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Blowoff Piping (ASME B31.1): Boilers with allowable working pressures over 100 psig (690 kPag) require two slow-opening blowoff valves.
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Traction and portable boilers, as well as forced circulation and electric steam boilers with a normal water content of 380 L (100 US gallons) or less, require only one blowoff valve.
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Miscellaneous Piping (ASME B31.1): Various fittings attached to a low-pressure steam boiler include: a steam outlet stop valve, feedwater inlet stop and check valves, blowoff valves, vent valve, and water level controls.
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Steam Outlet and Stop Valve (ASME BPVC IV): The steam produced in the boiler leaves through the steam outlet, and flows through the main header to the branch lines.
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Gate valves and globe valves are commonly used on the steam outlet of a boiler.
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Stop valves are used in the supply and return pipe connections of single and multiple boilers.
-
Boiler #1: Small steam drum, only equipped with a handhole.
-
Boiler #2: Larger shell, requires a manhole for inspections and maintenance.
-
Due to connection to a common steam header, Boiler #2 requires block and bleed valves in the steam line.
-
If Boiler #1 had a manhole, it too would need a block and bleed system.
-
Steam Line Stop Valves and Drains (ASME BPVC I): Required steam shut-off valves must be equipped with a position indicator.
-
Feedwater Piping (ASME B31.1): Each feedwater line to a boiler is required to have a check valve and a stop valve.
-
When multiple boilers are fed from a common source, a globe or regulating valve is required in the branch to each boiler.
-
Blowoff Piping (ASME B31.1): Boilers with allowable working pressures over 100 psig (690 kPag) require two slow-opening blowoff valves.
-
Traction and portable boilers, as well as forced circulation and electric steam boilers with a normal water content of 380 L (100 US gallons) or less, require only one blowoff valve.
-
Miscellaneous Piping (ASME B31.1): Various fittings attached to a low-pressure steam boiler include: a steam outlet stop valve, feedwater inlet stop and check valves, blowoff valves, vent valve, and water level controls.
-
Steam Outlet and Stop Valve (ASME BPVC IV): The steam produced in the boiler leaves through the steam outlet, and flows through the main header to the branch lines.
-
Gate valves and globe valves are commonly used on the steam outlet of a boiler.
-
Stop valves are used in the supply and return pipe connections of single and multiple boilers.
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Description
Test your knowledge of the code requirements for boiler outlet connections and valves on steam boilers. This quiz covers the various tapings in a boiler drum or shell, connecting external piping and fittings to controls, instruments, or fittings such as safety valves, main steam stop valves, water columns, pressure controls, and more.
