API 510 High Temperature Hydrogen Attack- HTHA

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Author:
egf4201
ID:
312003
Filename:
API 510 High Temperature Hydrogen Attack- HTHA
Updated:
2015-12-04 16:05:38
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API 510 High Temperature Hydrogen Attack HTHA
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API 510 High Temperature Hydrogen Attack- HTHA
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API 510 High Temperature Hydrogen Attack- HTHA
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  1. HTHA occurs on equipment exposed to hydrogen at elevated
    pressures and temps
  2. When HTHA occurs, the hydrogen in the process reacts with
    carbides
  3. When HTHA occurs, the hydrogen reacts to form
    methane
  4. When HTHA occurs, why is the steel weakened
    loss of carbides
  5. When HTHA occurs, the methane gas is trapped in the steel and forms
    fissues
  6. Which of the following materials is most susceptible to HTHA?
    A) C-0.5 Mo Steel
    B) 1Cr-0.5 Mo Steel
    C)2.25Cr-0.5 Mo Steel
    D) Mn-0.5 Mo Steel
    A) C-0.5 Mo Steel
    (this multiple choice question has been scrambled)
  7. Which of the following is not a factor in the development of HTHA?
    A) Hydrogen partial pressure
    B) Time
    C) Stress
    D) Temp
    E) pH
    E) pH
    (this multiple choice question has been scrambled)
  8. Which of the following materials is normally not susceptible to HTHA?
    A) 300 Series S.S.
    B) 2.25 Chrome
    C) C.S.
    D) 1.25 Chrome
    A) 300 Series S.S.
    (this multiple choice question has been scrambled)
  9. Where does HTHA damage most often occur
    Randomly  in base metal, HAZ, and welds.
  10. What is the most successful way to discover HTHA damage?
    U.T. with a combination of velocity ratio and AUBT

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