Steam Plants: Identifying and Preventing Water Hammer
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Questions and Answers

What is the main focus of this objective?

  • Preventing and responding to water hammer (correct)
  • Identifying different types of piping systems
  • Understanding the process of steam generation
  • Exploring the effects of water hammer on steam plants

    • How is water hammer recognizable?

  • By the sudden acceleration of fluid
  • By the introduction of steam into cold steam lines
  • By the closure of discharge check valves
  • Through the shaking of piping systems (correct)

    • What causes water hammer to occur when pumps stop?

  • Sudden acceleration of fluid
  • Closure of discharge check valves
  • Introduction of steam into cold steam lines
  • Sudden closure of discharge check valves (correct)

    • What can the consequences of water hammer range from?

    <p>Severe shock to pipe failures</p> Signup and view all the answers

    When does water hammer occur when steam is first admitted into cold steam lines?

    <p>When steam is first admitted</p> Signup and view all the answers

    What is imperative for operators in terms of water hammer?

    <p>Being familiar with methods of water hammer prevention</p> Signup and view all the answers

    What can cause water hammer?

    <p>Sudden stoppage or sudden acceleration of fluid</p> Signup and view all the answers

    What can cause sudden stoppage?

    <p>Swing check valves closing suddenly when pumps stop or control valves close quickly</p> Signup and view all the answers

    What causes sudden fluid acceleration?

    <p>Pumps starting suddenly, with discharge valves fully open</p> Signup and view all the answers

    How can water hammer be prevented?

    <p>Operating equipment carefully</p> Signup and view all the answers

    What is a design solution to prevent water hammer in steam systems?

    <p>Install warm-up valves around steam valves on steam lines larger than DN 50</p> Signup and view all the answers

    What should be done if water hammer occurs while placing a boiler on-line?

    <p>Turn off the boiler and close the non-return valve</p> Signup and view all the answers

    How can malfunctioning steam traps be addressed?

    <p>Open steam trap test valves, or use other means to locate malfunctioning steam traps</p> Signup and view all the answers

    What can help remove moisture from the steam in longer saturated steam lines?

    <p>Install steam separators in longer saturated steam lines</p> Signup and view all the answers

    How can fluid velocities be reduced in piping systems?

    <p>Redesign piping systems so that fluid velocities are lower</p> Signup and view all the answers

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