Preventing Water Hammer in Steam Plants
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Questions and Answers

What can cause sudden stoppage in a fluid system?

  • Control valves (such as solenoid valves) opening rapidly
  • Manual valves being opened quickly
  • Swing check valves closing suddenly when pumps stop or control valves close quickly (correct)
  • Pumps starting suddenly, with discharge valves fully open

    • What leads to sudden fluid acceleration in a fluid system?

  • Manual valves being opened quickly
  • Pumps starting suddenly, with discharge valves fully open (correct)
  • Saturated steam and saturated water (condensate) co-existing in steam or condensate lines
  • Control valves (such as a solenoid valve) opening rapidly

    • How can water hammer in fluid systems be prevented?

  • Operating equipment carefully
  • Redesigning piping systems
  • Installing piping components that reduce or eliminate water hammer (correct)
  • All of the above

    • What should be done to prevent excess steam and water loss during warm-up of steam lines?

    <p>Use small warm-up lines, rather than main isolation valves</p> Signup and view all the answers

    What is a design solution to prevent or reduce the severity of water hammer in steam systems?

    <p>Install no-slam design check valves</p> Signup and view all the answers

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

    <p>Close the non-return valve at once</p> Signup and view all the answers

    What should be done if water hammer occurs in the boiler house during routine operation?

    <p>Check the boiler water level and then lower it with the boiler blowoff valves</p> Signup and view all the answers

    What action should be taken if a malfunctioning steam trap is identified in the plant?

    <p>Isolate and remove the trap for repair or replacement following plant lockout and tagout procedures</p> Signup and view all the answers

    What is one of the recognizable signs of water hammer?

    <p>Loud noises and shaking of piping systems</p> Signup and view all the answers

    When does water hammer occur in steam systems?

    <p>When steam is first admitted into cold steam lines or heat exchangers</p> Signup and view all the answers

    What causes water hammer in fluid systems?

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

    What is the consequence of severe water hammer?

    <p>Pipe failures</p> Signup and view all the answers

    What is the primary focus of this objective in relation to water hammer?

    <p>Identify, prevent, and respond to water hammer</p> Signup and view all the answers

    When can the noises associated with water hammer be small pings or loud bangs?

    <p>Depending on the severity of the water hammer</p> Signup and view all the answers

    Why is it imperative that operators are familiar with methods of water hammer prevention?

    <p>To prevent costly pipe failures caused by water hammer</p> Signup and view all the answers

    What is the main focus of this objective?

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

    How is water hammer recognizable?

    <p>As a series of loud noises and shaking of piping systems</p> Signup and view all the answers

    What causes water hammer when it occurs during the admission of steam into cold steam lines?

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

    What can be the consequences of water hammer?

    <p>Mild shockwaves to pipe failures</p> Signup and view all the answers

    Why is it imperative that operators are familiar with methods of water hammer prevention?

    <p>To prevent costly and dangerous effects</p> Signup and view all the answers

    When does water hammer occur due to the sudden stoppage of pumps?

    <p>When discharge check valves close suddenly</p> Signup and view all the answers

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