When taking a shell-and-tube heat exchanger with a removable tube bundle such as a bayonet-tube heavy fuel oil service heater out of service, to prevent water hammer what statement represents the correct operating procedure?

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Accepted Answer

Crack open the condensate drains first. Gradually close down and secure the steam, then close the condensate drains when no longer draining condensate. Finally, secure the heavy fuel oil.

Answer

Open wide the condensate drains first. Gradually close down and secure the steam, then close the condensate drains when no longer issuing dry steam. Finally, secure the heavy fuel oil.

Answer

Secure the heavy fuel oil first, then crack open the condensate drains. Gradually close down and secure the steam, then close the condensate drains when no longer draining condensate.

Answer

Secure the heavy fuel oil first, then crack open the condensate drains. Gradually close down and secure the steam, then close the condensate drains when no longer issuing dry steam.

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