Podcast
Questions and Answers
EASY Who verifies that the lockout was performed correctly?
EASY Who verifies that the lockout was performed correctly?
- Chief Engineer
- Contractor
- Safety Officer
- Supervisor or Operations Lock (correct)
What do contractors and plant employees record on the lockout sheet?
What do contractors and plant employees record on the lockout sheet?
- The lockout key number
- The type of work being performed
- The date and time of the lockout
- Their lock number and signature (correct)
When is the lockout no longer in effect?
When is the lockout no longer in effect?
- When the supervisory lock is removed
- When all personal locks are removed
- When the car seal is broken (correct)
- When the lockout sheet is completed
What does the operator record on the lockout sheet after removing the lock?
What does the operator record on the lockout sheet after removing the lock?
What happens to the removed locks?
What happens to the removed locks?
Who may keep the lockout sheet for future reference?
Who may keep the lockout sheet for future reference?
What is the primary purpose of the shutdown procedure for a steam boiler?
What is the primary purpose of the shutdown procedure for a steam boiler?
What should be done to the boiler for several days before shutting it down?
What should be done to the boiler for several days before shutting it down?
What should be done if the flame is observed to be irregular?
What should be done if the flame is observed to be irregular?
What should be tested before shutting down the boiler?
What should be tested before shutting down the boiler?
What should be done to the boiler steam pressure control before reducing the firing rate?
What should be done to the boiler steam pressure control before reducing the firing rate?
What should be done after isolating the boiler from the steam header?
What should be done after isolating the boiler from the steam header?
What should be done to the boiler control switch after reducing the firing rate to minimum?
What should be done to the boiler control switch after reducing the firing rate to minimum?
What should be done to the main and pilot manual fuel valves after shutting down the boiler?
What should be done to the main and pilot manual fuel valves after shutting down the boiler?
What is the first step in shutting down a steam boiler?
What is the first step in shutting down a steam boiler?
When should the boiler non-return valve be closed?
When should the boiler non-return valve be closed?
What should be done to the steam drum vent valve?
What should be done to the steam drum vent valve?
What is the purpose of a lockout sheet?
What is the purpose of a lockout sheet?
What is the purpose of a group lockout?
What is the purpose of a group lockout?
What should be done to the lockout points on a boiler?
What should be done to the lockout points on a boiler?
Who is responsible for verifying that all lockout points are locked?
Who is responsible for verifying that all lockout points are locked?
What is the purpose of sealing the lockbox with a car seal?
What is the purpose of sealing the lockbox with a car seal?
Why is it necessary to follow site-specific lockout-tagout procedures?
Why is it necessary to follow site-specific lockout-tagout procedures?
What should be done to the boiler feedwater pump if the system has only a single boiler?
What should be done to the boiler feedwater pump if the system has only a single boiler?
MEDIUM What should be done to the boiler for maintenance, inspection, or layup?
MEDIUM What should be done to the boiler for maintenance, inspection, or layup?
Why is it necessary to test safety interlocks during the shutdown procedure?
Why is it necessary to test safety interlocks during the shutdown procedure?
What should be observed for irregularity during the shutdown procedure?
What should be observed for irregularity during the shutdown procedure?
What should be performed on the boiler steam pressure control before reducing the firing rate?
What should be performed on the boiler steam pressure control before reducing the firing rate?
What is the next step after isolating the boiler from the steam header?
What is the next step after isolating the boiler from the steam header?
What should be done to the main and pilot manual fuel valves after shutting down the boiler?
What should be done to the main and pilot manual fuel valves after shutting down the boiler?
What is the purpose of increasing the rate of continuous blowdown and the frequency of bottom blowoff?
What is the purpose of increasing the rate of continuous blowdown and the frequency of bottom blowoff?
What should be adjusted if the flame is observed to be irregular?
What should be adjusted if the flame is observed to be irregular?
What is the purpose of recording the lockout in the official Log Book?
What is the purpose of recording the lockout in the official Log Book?
What happens to the lockbox lock after the work on the boiler is complete?
What happens to the lockbox lock after the work on the boiler is complete?
What is the purpose of the lockout sheet?
What is the purpose of the lockout sheet?
Who removes the locks and restores valves and breakers to their previous positions?
Who removes the locks and restores valves and breakers to their previous positions?
What is the purpose of the car seal?
What is the purpose of the car seal?
What happens to the removed locks after the lockout is complete?
What happens to the removed locks after the lockout is complete?
What is the first step in shutting down a steam boiler?
What is the first step in shutting down a steam boiler?
What happens when the boiler pressure drops to below main steam header pressure?
What happens when the boiler pressure drops to below main steam header pressure?
Why is it necessary to open the steam drum vent valve?
Why is it necessary to open the steam drum vent valve?
What is the purpose of a lockout sheet?
What is the purpose of a lockout sheet?
Who is responsible for verifying that all lockout points are locked?
Who is responsible for verifying that all lockout points are locked?
What happens to the key for the lockbox set?
What happens to the key for the lockbox set?
Why is it necessary to follow site-specific lockout-tagout procedures?
Why is it necessary to follow site-specific lockout-tagout procedures?
What is the purpose of sealing the lockbox with a car seal?
What is the purpose of sealing the lockbox with a car seal?
What should be done to the boiler feedwater pump if the system has only a single boiler?
What should be done to the boiler feedwater pump if the system has only a single boiler?
What is the primary purpose of a group lockout?
What is the primary purpose of a group lockout?
HARD What is the purpose of increasing the rate of continuous blowdown and the frequency of bottom blowoff several days before shutting down the boiler?
HARD What is the purpose of increasing the rate of continuous blowdown and the frequency of bottom blowoff several days before shutting down the boiler?
What should be done if the flame is observed to be irregular during the shutdown procedure?
What should be done if the flame is observed to be irregular during the shutdown procedure?
What is the purpose of testing all operating and limit controls during the shutdown procedure?
What is the purpose of testing all operating and limit controls during the shutdown procedure?
What should be done after reducing the firing rate to minimum during the shutdown procedure?
What should be done after reducing the firing rate to minimum during the shutdown procedure?
Why is it necessary to test safety interlocks during the shutdown procedure?
Why is it necessary to test safety interlocks during the shutdown procedure?
What should be done after isolating the boiler from the steam header during the shutdown procedure?
What should be done after isolating the boiler from the steam header during the shutdown procedure?
What is the purpose of performing a safety valve try lever test during the shutdown procedure?
What is the purpose of performing a safety valve try lever test during the shutdown procedure?
Why is it necessary to transfer load to other operating boilers during the shutdown procedure?
Why is it necessary to transfer load to other operating boilers during the shutdown procedure?
What is the primary purpose of the supervisor or operations lock?
What is the primary purpose of the supervisor or operations lock?
What is the purpose of the lockout sheet?
What is the purpose of the lockout sheet?
What happens to the lockout key after the lockout is complete?
What happens to the lockout key after the lockout is complete?
Who is responsible for removing the supervisory lock from the lockbox?
Who is responsible for removing the supervisory lock from the lockbox?
What is the purpose of the car seal?
What is the purpose of the car seal?
What is the final step in the lockout procedure?
What is the final step in the lockout procedure?
What is the primary purpose of locking and tagging the boiler control circuit breaker?
What is the primary purpose of locking and tagging the boiler control circuit breaker?
What is the purpose of opening the non-return valve drain and the steam line vent/drain?
What is the purpose of opening the non-return valve drain and the steam line vent/drain?
Who is responsible for verifying that all lockout points are locked and that the boiler is in a zero-energy state?
Who is responsible for verifying that all lockout points are locked and that the boiler is in a zero-energy state?
What is the purpose of recording the lockout in the official Log Book?
What is the purpose of recording the lockout in the official Log Book?
What is the purpose of placing a lockbox lock on a lockout point?
What is the purpose of placing a lockbox lock on a lockout point?
What is the purpose of sealing the lockbox with a car seal?
What is the purpose of sealing the lockbox with a car seal?
What is the purpose of isolating the boiler from the main header?
What is the purpose of isolating the boiler from the main header?
What is the purpose of closing the boiler non-return valve?
What is the purpose of closing the boiler non-return valve?
What is the purpose of locking and tagging the boiler feedwater pump?
What is the purpose of locking and tagging the boiler feedwater pump?
What is the purpose of opening the steam drum vent valve?
What is the purpose of opening the steam drum vent valve?
Study Notes
Shutting Down a High-Pressure Steam Boiler
- Increase continuous blowdown rate and frequency of bottom blowoff several days before shutdown to remove sediment and sludge.
- Adjust chemical feed rates to accommodate increased make-up water.
Preparing for Shutdown
- Observe flame for irregularity and employ a certified burner service technician to adjust the burner if necessary.
- Test all operating and limit controls, including:
- Low water cut-off
- Combination feeder/cut-off control or pump control
- High-pressure cut-off
- High and low fuel pressure cut-offs
- Flame scanner/flame failure detection devices
- Combustion air proving switch
- Any other control as specified by the boiler manufacturer
- Perform a safety valve try lever test.
Shutdown Procedure
- Put boiler steam pressure control in manual mode and slowly reduce firing rate, monitoring main steam header pressure to confirm other boilers have taken the load.
- Isolate boiler from steam header and perform a safety valve pop test.
- Turn boiler control switch to "off".
- Shut, lock, and tag main and pilot manual fuel valves.
- Open, lock, and tag boiler control circuit breaker.
Isolating the Boiler
- Close boiler non-return valve (main steam outlet stop valve) when boiler stops supplying steam.
- Isolate boiler from main header, open non-return valve drain and steam line vent/drain, and lock and tag in shut position.
- Close stop valves in boiler feedwater supply line and lock and tag them.
Cooling Down and Lockout
- Let boiler cool down slowly.
- Open steam drum vent valve when boiler pressure drops to approximately 20-35 kPa to prevent vacuum formation.
- Record results of limit tests and time boiler went off-line in log book.
Lockout Procedure
- Follow site-specific lockout-tagout procedures.
- Obtain lockout sheet and lockbox with numbered group lockout locks.
- Place lockbox lock on lockout points, record lock number, and initial lockout point item on lockout sheet.
- Verify all lockout points are locked and electrically operated equipment is de-energized.
- Seal lockbox with car seal and record seal number on lockout sheet.
Removing Lockout
- Workers sign off that their work is complete and remove personal locks from lockbox.
- Chief or shift engineer removes supervisory lock from lockbox.
- Break car seal and remove lockout key from lockbox.
- Qualified operator removes locks, restores valves and breakers to previous positions, and records removal on lockout sheet.
- Record lockbox lockout removal in official log book.
Shutting Down a High-Pressure Steam Boiler
- Increase continuous blowdown rate and frequency of bottom blowoff several days before shutdown to remove sediment and sludge.
- Adjust chemical feed rates to accommodate increased make-up water.
Preparing for Shutdown
- Observe flame for irregularity and employ a certified burner service technician to adjust the burner if necessary.
- Test all operating and limit controls, including:
- Low water cut-off
- Combination feeder/cut-off control or pump control
- High-pressure cut-off
- High and low fuel pressure cut-offs
- Flame scanner/flame failure detection devices
- Combustion air proving switch
- Any other control as specified by the boiler manufacturer
- Perform a safety valve try lever test.
Shutdown Procedure
- Put boiler steam pressure control in manual mode and slowly reduce firing rate, monitoring main steam header pressure to confirm other boilers have taken the load.
- Isolate boiler from steam header and perform a safety valve pop test.
- Turn boiler control switch to "off".
- Shut, lock, and tag main and pilot manual fuel valves.
- Open, lock, and tag boiler control circuit breaker.
Isolating the Boiler
- Close boiler non-return valve (main steam outlet stop valve) when boiler stops supplying steam.
- Isolate boiler from main header, open non-return valve drain and steam line vent/drain, and lock and tag in shut position.
- Close stop valves in boiler feedwater supply line and lock and tag them.
Cooling Down and Lockout
- Let boiler cool down slowly.
- Open steam drum vent valve when boiler pressure drops to approximately 20-35 kPa to prevent vacuum formation.
- Record results of limit tests and time boiler went off-line in log book.
Lockout Procedure
- Follow site-specific lockout-tagout procedures.
- Obtain lockout sheet and lockbox with numbered group lockout locks.
- Place lockbox lock on lockout points, record lock number, and initial lockout point item on lockout sheet.
- Verify all lockout points are locked and electrically operated equipment is de-energized.
- Seal lockbox with car seal and record seal number on lockout sheet.
Removing Lockout
- Workers sign off that their work is complete and remove personal locks from lockbox.
- Chief or shift engineer removes supervisory lock from lockbox.
- Break car seal and remove lockout key from lockbox.
- Qualified operator removes locks, restores valves and breakers to previous positions, and records removal on lockout sheet.
- Record lockbox lockout removal in official log book.
Shutting Down a High-Pressure Steam Boiler
- Increase continuous blowdown rate and frequency of bottom blowoff several days before shutdown to remove sediment and sludge.
- Adjust chemical feed rates to accommodate increased make-up water.
Preparing for Shutdown
- Observe flame for irregularity and employ a certified burner service technician to adjust the burner if necessary.
- Test all operating and limit controls, including:
- Low water cut-off
- Combination feeder/cut-off control or pump control
- High-pressure cut-off
- High and low fuel pressure cut-offs
- Flame scanner/flame failure detection devices
- Combustion air proving switch
- Any other control as specified by the boiler manufacturer
- Perform a safety valve try lever test.
Shutdown Procedure
- Put boiler steam pressure control in manual mode and slowly reduce firing rate, monitoring main steam header pressure to confirm other boilers have taken the load.
- Isolate boiler from steam header and perform a safety valve pop test.
- Turn boiler control switch to "off".
- Shut, lock, and tag main and pilot manual fuel valves.
- Open, lock, and tag boiler control circuit breaker.
Isolating the Boiler
- Close boiler non-return valve (main steam outlet stop valve) when boiler stops supplying steam.
- Isolate boiler from main header, open non-return valve drain and steam line vent/drain, and lock and tag in shut position.
- Close stop valves in boiler feedwater supply line and lock and tag them.
Cooling Down and Lockout
- Let boiler cool down slowly.
- Open steam drum vent valve when boiler pressure drops to approximately 20-35 kPa to prevent vacuum formation.
- Record results of limit tests and time boiler went off-line in log book.
Lockout Procedure
- Follow site-specific lockout-tagout procedures.
- Obtain lockout sheet and lockbox with numbered group lockout locks.
- Place lockbox lock on lockout points, record lock number, and initial lockout point item on lockout sheet.
- Verify all lockout points are locked and electrically operated equipment is de-energized.
- Seal lockbox with car seal and record seal number on lockout sheet.
Removing Lockout
- Workers sign off that their work is complete and remove personal locks from lockbox.
- Chief or shift engineer removes supervisory lock from lockbox.
- Break car seal and remove lockout key from lockbox.
- Qualified operator removes locks, restores valves and breakers to previous positions, and records removal on lockout sheet.
- Record lockbox lockout removal in official log book.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the steps involved in lockout tagout procedures, including placing personal locks, recording lock numbers, and verifying correct lockout.
