api 571 for api 510/570 ( Caustic stress corrosion cracking)

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egf4201
ID:
303828
Filename:
api 571 for api 510/570 ( Caustic stress corrosion cracking)
Updated:
2015-11-19 11:07:40
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api 571 510 570 Caustic stress corrosion cracking
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api 571 for api 510/570 ( Caustic stress corrosion cracking)
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api 571 for api 510/570 ( Caustic stress corrosion cracking)
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  1. Caustic Embrittlement can cause cracks that normally initiate:
    on the surface adjacent to welds
  2. Which alloys are more resistant to Caustic Stress Corrosion Cracking?
    A) Chromes
    B) Nickels
    C) Sulfides
    D) Ferrites
    B) Nickels
    (this multiple choice question has been scrambled)
  3. Which of the following is not a factor in the Caustic Stress Corrosion Cracking?
    A) Caustic strenght
    B) Time
    C) Stress
    D) Temp
    E) Material
    B) Time
    (this multiple choice question has been scrambled)
  4. In a caustic system, which of the following if improperly designed can contribute to Caustic Stress Corrosion Cracking?
    A) Heat tracing
    B) Reducers
    C) Flanges
    D) Nozzles
    A) Heat tracing
    (this multiple choice question has been scrambled)
  5. Which of the following is a common way that Operations causes Caustic Stress Corrosion Cracking?
    A) Steam cleaning
    B) Increasing flow rate
    C) Lowering the pH
    D) Overpressure
    A) Steam cleaning
    (this multiple choice question has been scrambled)
  6. The likelihood of Caustic Stress Corrosion Cracking can be reduced by:
    Stress-relieving
  7. A CS caustic system has a 10% concentration of NaOH(caustic. Above what temp is stress-relieving recommended?
    176°F
  8. A CS caustic system has a 30% concentration of NaOH(caustic). Above what temp is stress-relieving recommended?
    140°F
  9. A CS caustic system has a 10% concentration of NaOH(caustic). Above what temp is stress relieving no longer effective?
    220°F
  10. A caustic system has a 30% concentration of NaOH(caustic). Above what temp are nickel alloys recommended?
    205°F

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