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EASY What is the primary objective of the furnace purge during the startup of a steam boiler?

  • To ensure the main burner light off
  • To remove any combustible gases from the furnace (correct)
  • To warm up the steam piping system
  • To heat up the steam lines and headers

    • What is the recommended procedure for warming up a single boiler steam heating system according to ASME VI?

  • Warm up the steam lines first and then the boiler
  • Warm up the boiler and steam lines simultaneously (correct)
  • Warm up the boiler and steam lines independently of each other
  • Warm up the boiler first and then the steam lines

    • What is the purpose of opening the boiler steam outlet valve prior to firing the boiler during a simultaneous warm-up?

  • To allow steam to flow into the header (correct)
  • To ensure the main burner light off
  • To prevent water hammer
  • To warm up the steam lines and headers

    • What is the recommended resource for guidelines on starting, warming, and cutting in steam boilers?

    <p>All of the above</p> Signup and view all the answers

    What is the primary concern when starting a steam boiler?

    <p>Preventing water hammer</p> Signup and view all the answers

    In a single power boiler plant, what type of valve is typically used at the outlet of the boiler?

    <p>Gate valve</p> Signup and view all the answers

    What is the term for the piping downstream of the header stop valve?

    <p>Steam header</p> Signup and view all the answers

    What is the purpose of warming up the steam lines and headers before placing a boiler in service?

    <p>To prevent water hammer</p> Signup and view all the answers

    What should be done with steam traps when the steam lines are warmed up?

    <p>Close bypasses and place steam traps in service</p> Signup and view all the answers

    What should be done to the superheater drains or vents during boiler startup?

    <p>Keep them open until adequate flow of superheated steam is established</p> Signup and view all the answers

    Why should the water column and gauge glass be blown down and tested?

    <p>To ensure the connections are clear and the level is correct</p> Signup and view all the answers

    What should be done with the boiler until the operating control reaches its cut-out point?

    <p>Stay with the boiler until the operating control reaches its cut-out point</p> Signup and view all the answers

    What is the purpose of the try lever and pop tests?

    <p>To check the safety valve for evidence of simmering</p> Signup and view all the answers

    What is the primary purpose of a steam header in a steam system?

    <p>To supply all the plant equipment taking steam at a given pressure</p> Signup and view all the answers

    Why is it important to warm the steam header with the boiler stop, header stop, and drain valves open?

    <p>To allow the steam piping to warm and pressurize at the same rate as the boiler</p> Signup and view all the answers

    What happens to the steam entering the cold steam piping during warm-up?

    <p>It condenses heavily at first</p> Signup and view all the answers

    What is the purpose of low point drains in a steam system?

    <p>To remove condensate from the steam piping</p> Signup and view all the answers

    What is the recommended procedure for warming a steam boiler and its steam piping simultaneously?

    <p>Follow a site-specific procedure and manufacturer instructions</p> Signup and view all the answers

    What is the purpose of opening the boiler drum vent during startup?

    <p>To release corrosive dissolved gases from the boiler water</p> Signup and view all the answers

    Why is it important to raise the water temperature and pressure slowly during startup?

    <p>To prevent thermal shock and uneven expansion</p> Signup and view all the answers

    What should be done with the drum vent valve when the boiler pressure reaches 15 to 20 kPa?

    <p>Close it</p> Signup and view all the answers

    Why should the steam line low point drains be pinched back during startup?

    <p>To prevent excessive steam blowing</p> Signup and view all the answers

    What should be done with the firing rate after the boiler has warmed up and is steaming?

    <p>Increase it slowly</p> Signup and view all the answers

    MEDIUM What should be done with the steam traps when the steam lines are warmed up?

    <p>Put them in service</p> Signup and view all the answers

    Why should the superheater drains or vents be kept open during boiler startup?

    <p>Until adequate flow of superheated steam is established</p> Signup and view all the answers

    What should be done with the water column and gauge glass during boiler startup?

    <p>Blow them down to ensure connections are clear and level is correct</p> Signup and view all the answers

    What should be done with the boiler during startup?

    <p>Stay with it until the operating control reaches its cut-out point</p> Signup and view all the answers

    What is the purpose of performing the try lever and pop tests?

    <p>To ensure the safety valve is functioning properly</p> Signup and view all the answers

    What is the primary purpose of the simultaneous warm-up procedure in a steam boiler?

    <p>To ensure the steam lines and headers are warm before the boiler is placed in service</p> Signup and view all the answers

    According to ASME VII, how can a high-pressure steam plant comprised of a single power boiler be warmed up?

    <p>Either simultaneously or independently</p> Signup and view all the answers

    What is the purpose of preparing the steam piping system before starting a steam boiler?

    <p>To ensure the steam lines are warm, dry, and ready to go on line when the boiler is ready</p> Signup and view all the answers

    What is the name of the valve typically used at the outlet of a single power boiler?

    <p>Gate valve</p> Signup and view all the answers

    Why is it important to warm up the steam lines and headers before placing a boiler in service?

    <p>To prevent water hammer</p> Signup and view all the answers

    What is the term for the piping downstream of the header stop valve in a steam system?

    <p>Steam header</p> Signup and view all the answers

    What resource is recommended for guidelines on starting, warming, and cutting in steam boilers?

    <p>ASME VI and ASME VII</p> Signup and view all the answers

    What should be done with the steam lines during the warm-up period of a steam boiler?

    <p>Keep the steam lines warm, dry, and ready to go on line</p> Signup and view all the answers

    What is the primary objective of warming up the steam header with the boiler stop, header stop, and drain valves open?

    <p>To allow for the condensate to form and be removed quickly</p> Signup and view all the answers

    What is the purpose of opening the superheater vent during boiler preparation?

    <p>To ensure the superheater does not overheat due to lack of steam flow</p> Signup and view all the answers

    What should be done with the low point drains during the simultaneous warm-up procedure?

    <p>They should be opened to release condensate as it forms</p> Signup and view all the answers

    What is the recommended procedure for raising the water temperature and pressure during startup?

    <p>Raise the water temperature and pressure slowly to prevent thermal shock and uneven expansion</p> Signup and view all the answers

    What should be done with the firing rate after the boiler has warmed up and is steaming?

    <p>It should be increased slowly when the boiler has thoroughly warmed up</p> Signup and view all the answers

    Why is it important to inspect the boiler frequently during the warm-up period?

    <p>To observe the operation of the burner and check for leakage</p> Signup and view all the answers

    What should be done with the boiler control switch after the boiler has reached its operating pressure?

    <p>It should be turned to the 'on' or 'start' position</p> Signup and view all the answers

    What is the purpose of opening the main steam shutoff valve during the simultaneous warm-up procedure?

    <p>To supply steam to the steam piping system</p> Signup and view all the answers

    Why is it important to close the drum vent valve when the boiler pressure reaches 15 to 20 kPa?

    <p>To ensure all the air has been expelled from the boiler</p> Signup and view all the answers

    What should be done with the steam trap bypass lines during the simultaneous warm-up procedure?

    <p>They should be opened to allow for the release of condensate</p> Signup and view all the answers

    What is the purpose of blowing down the water column and gauge glass during boiler startup?

    <p>To ensure the connections are clear and the level is correct</p> Signup and view all the answers

    Why should the superheater drains or vents be kept open during boiler startup?

    <p>To allow for adequate flow of superheated steam</p> Signup and view all the answers

    What should be done with the steam traps after the steam lines are warmed up?

    <p>Close the trap bypasses and place steam traps in service</p> Signup and view all the answers

    Why is it important to stay with the boiler until the operating control reaches its cut-out point?

    <p>To shut off the burner at the set pressure</p> Signup and view all the answers

    What is the purpose of performing the try lever and pop tests?

    <p>To test the safety valve</p> Signup and view all the answers

    What is the primary purpose of ASME VI Recommended Rules for the Care and Operation of Heating Boilers?

    <p>To outline the procedures for starting, warming, and cutting in steam boilers</p> Signup and view all the answers

    What is the primary advantage of simultaneous warm-up of a steam boiler and its steam piping system?

    <p>It reduces the risk of water hammer</p> Signup and view all the answers

    What is the primary concern when warming up a steam piping system?

    <p>Ensuring the piping is warm, dry, and ready to go online</p> Signup and view all the answers

    What is the purpose of the header stop valve in a steam system?

    <p>To isolate the boiler from the steam piping system</p> Signup and view all the answers

    According to ASME VII, how can a high-pressure steam plant comprised of multiple power boilers be warmed up?

    <p>Simultaneously or independently, depending on the plant configuration</p> Signup and view all the answers

    What is the primary purpose of preparing the steam piping system before starting a steam boiler?

    <p>To prevent water hammer and associated damage</p> Signup and view all the answers

    What is the recommended procedure for warming up a steam boiler and its steam piping system according to ASME VI?

    <p>Open the boiler steam outlet valve prior to firing the boiler</p> Signup and view all the answers

    What is the primary purpose of warming up the steam lines and headers before placing a boiler in service?

    <p>To prevent water hammer and associated damage</p> Signup and view all the answers

    What is the primary purpose of opening the boiler drum vent during startup?

    <p>To allow the release of corrosive dissolved gases from the boiler water</p> Signup and view all the answers

    What is the recommended procedure for raising the water temperature and pressure during startup?

    <p>Raising the temperature and pressure slowly to prevent thermal shock and uneven expansion</p> Signup and view all the answers

    What is the purpose of the simultaneous warm-up procedure in a steam boiler?

    <p>To warm the steam header and piping simultaneously with the boiler</p> Signup and view all the answers

    What should be done with the steam trap bypass lines during the simultaneous warm-up procedure?

    <p>They should be opened to allow steam to enter the trap</p> Signup and view all the answers

    Why is it important to inspect the boiler frequently during the warm-up period?

    <p>To detect any leaks or defects in the boiler or piping system</p> Signup and view all the answers

    What is the purpose of the low point drains in a steam system?

    <p>To remove condensate from the system during warm-up</p> Signup and view all the answers

    What should be done with the firing rate after the boiler has warmed up and is steaming?

    <p>It should be increased slowly when the boiler has thoroughly warmed up and good water circulation has been established</p> Signup and view all the answers

    What is the purpose of preparing the steam plant auxiliaries before startup?

    <p>To ensure that all necessary systems are functioning properly before startup</p> Signup and view all the answers

    Why is it important to close the drum vent valve when the boiler pressure reaches 15 to 20 kPa?

    <p>To ensure that all air has been expelled from the boiler</p> Signup and view all the answers

    What should be done with the boiler control switch after the boiler has reached its operating pressure?

    <p>It should be left in the 'on' position to maintain boiler operation</p> Signup and view all the answers

    Study Notes

    Safe Startup of a Steam Boiler

    • Monitor all aspects of startup, including furnace purge, ignition, and main burner light off.
    • Follow boiler manufacturer operating procedures and site-specific standard operating procedures.

    Preparing Steam Piping System

    • Warm up steam lines and headers before placing boilers in service to prevent water hammer.
    • Consider how plant steam lines will be warmed up, then prepare the steam piping system to be warm, dry, and ready to go online.

    Simultaneous Warm-Up

    • Open boiler steam outlet valve prior to firing the boiler and keep it open during warm-up.
    • Warm up steam header with boiler stop, header stop, and drain valves open.
    • Condensate that forms will be removed by low point drains, steam traps, and steam trap bypass lines.

    Independent Warm-Up

    • Leave boiler stop valve closed until boiler reaches operating pressure.
    • Open stop valve slowly and warm up header.
    • Ensure trap bypasses, header drain valves, and other related drain valves are opened during this procedure.

    Steam Boiler and Steam Piping Simultaneous Warm-Up Procedure

    • Prepare steam plant auxiliaries, including boiler feed pump, condensate return system, and others.
    • Check all steam system valves are correctly lined up.
    • Open low point system drains to release condensate and open trap bypasses where they exist.
    • Review manufacturer recommendations for burner and boiler startup.
    • Open main steam shutoff valve and boiler drum vent.
    • Ensure boiler control switch is in the “off” position and main disconnect switch is closed.
    • Light pilot burner (if applicable) and open main test firing valve.
    • Place boiler on low fire and turn boiler control switch to the “on” or “start” position.
    • Raise water temperature and pressure slowly to prevent thermal shock and uneven expansion.
    • Perform operating control and safety limit checks during warm-up.
    • Inspect boiler frequently during warm-up and observe burner operation.
    • Close drum vent valve when boiler pressure reaches 15 to 20 kPa.
    • Close trap bypasses and place steam traps in service when steam lines are warmed up.
    • Follow warm-up instructions of boiler manufacturer and site-specific procedures.
    • Blow down water column and gauge glass to ensure connections are clear and level is correct.
    • Test low water cut-offs by opening drains on water column and low water cut-off float cage.
    • Stay with boiler until operating control reaches its cut-out point and shuts off burner at set pressure.
    • Check safety valve for evidence of simmering and perform try lever and pop tests.
    • Enter required information in the log book.

    Safe Startup of a Steam Boiler

    • Monitor all aspects of startup, including furnace purge, ignition, and main burner light off.
    • Follow boiler manufacturer operating procedures and site-specific standard operating procedures.

    Preparing Steam Piping System

    • Warm up steam lines and headers before placing boilers in service to prevent water hammer.
    • Consider how plant steam lines will be warmed up, then prepare the steam piping system to be warm, dry, and ready to go online.

    Simultaneous Warm-Up

    • Open boiler steam outlet valve prior to firing the boiler and keep it open during warm-up.
    • Warm up steam header with boiler stop, header stop, and drain valves open.
    • Condensate that forms will be removed by low point drains, steam traps, and steam trap bypass lines.

    Independent Warm-Up

    • Leave boiler stop valve closed until boiler reaches operating pressure.
    • Open stop valve slowly and warm up header.
    • Ensure trap bypasses, header drain valves, and other related drain valves are opened during this procedure.

    Steam Boiler and Steam Piping Simultaneous Warm-Up Procedure

    • Prepare steam plant auxiliaries, including boiler feed pump, condensate return system, and others.
    • Check all steam system valves are correctly lined up.
    • Open low point system drains to release condensate and open trap bypasses where they exist.
    • Review manufacturer recommendations for burner and boiler startup.
    • Open main steam shutoff valve and boiler drum vent.
    • Ensure boiler control switch is in the “off” position and main disconnect switch is closed.
    • Light pilot burner (if applicable) and open main test firing valve.
    • Place boiler on low fire and turn boiler control switch to the “on” or “start” position.
    • Raise water temperature and pressure slowly to prevent thermal shock and uneven expansion.
    • Perform operating control and safety limit checks during warm-up.
    • Inspect boiler frequently during warm-up and observe burner operation.
    • Close drum vent valve when boiler pressure reaches 15 to 20 kPa.
    • Close trap bypasses and place steam traps in service when steam lines are warmed up.
    • Follow warm-up instructions of boiler manufacturer and site-specific procedures.
    • Blow down water column and gauge glass to ensure connections are clear and level is correct.
    • Test low water cut-offs by opening drains on water column and low water cut-off float cage.
    • Stay with boiler until operating control reaches its cut-out point and shuts off burner at set pressure.
    • Check safety valve for evidence of simmering and perform try lever and pop tests.
    • Enter required information in the log book.

    Safe Startup of a Steam Boiler

    • Monitor all aspects of startup, including furnace purge, ignition, and main burner light off.
    • Follow boiler manufacturer operating procedures and site-specific standard operating procedures.

    Preparing Steam Piping System

    • Warm up steam lines and headers before placing boilers in service to prevent water hammer.
    • Consider how plant steam lines will be warmed up, then prepare the steam piping system to be warm, dry, and ready to go online.

    Simultaneous Warm-Up

    • Open boiler steam outlet valve prior to firing the boiler and keep it open during warm-up.
    • Warm up steam header with boiler stop, header stop, and drain valves open.
    • Condensate that forms will be removed by low point drains, steam traps, and steam trap bypass lines.

    Independent Warm-Up

    • Leave boiler stop valve closed until boiler reaches operating pressure.
    • Open stop valve slowly and warm up header.
    • Ensure trap bypasses, header drain valves, and other related drain valves are opened during this procedure.

    Steam Boiler and Steam Piping Simultaneous Warm-Up Procedure

    • Prepare steam plant auxiliaries, including boiler feed pump, condensate return system, and others.
    • Check all steam system valves are correctly lined up.
    • Open low point system drains to release condensate and open trap bypasses where they exist.
    • Review manufacturer recommendations for burner and boiler startup.
    • Open main steam shutoff valve and boiler drum vent.
    • Ensure boiler control switch is in the “off” position and main disconnect switch is closed.
    • Light pilot burner (if applicable) and open main test firing valve.
    • Place boiler on low fire and turn boiler control switch to the “on” or “start” position.
    • Raise water temperature and pressure slowly to prevent thermal shock and uneven expansion.
    • Perform operating control and safety limit checks during warm-up.
    • Inspect boiler frequently during warm-up and observe burner operation.
    • Close drum vent valve when boiler pressure reaches 15 to 20 kPa.
    • Close trap bypasses and place steam traps in service when steam lines are warmed up.
    • Follow warm-up instructions of boiler manufacturer and site-specific procedures.
    • Blow down water column and gauge glass to ensure connections are clear and level is correct.
    • Test low water cut-offs by opening drains on water column and low water cut-off float cage.
    • Stay with boiler until operating control reaches its cut-out point and shuts off burner at set pressure.
    • Check safety valve for evidence of simmering and perform try lever and pop tests.
    • Enter required information in the log book.

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    Description

    Learn the essential steps to safely start up a steam boiler, including furnace purge, ignition, and main burner light off. Understand the ignition sequence and importance of following manufacturer and site-specific procedures.

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