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API 571 > Caustic Stress Corrosion Cracking (Caustic Embrittlement > Flashcards

Caustic Stress Corrosion Cracking (Caustic Embrittlement Flashcards

1
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Critical range of concentration of caustic :

A

50-100 ppm

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2
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

> 

ppm of caustic concentration
A

50

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3
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Crack initiate in______

A

surface

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4
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Susceptible materials : ___, ____ and SS300

A

CS, LAS

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5
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

When increase temperature increase

A

crack rates

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6
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Factor important is temperature and _____

A

stress

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7
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Critical in presence of caustic, ______, sulfuric acid alkilation and ____

A

H2S, HF

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8
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Crack move ______ to the weld

A

parallel

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9
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Crack is ______ form

A

spider web

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10
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Carcks and _____ and _______ (300SS)

A

intergranular, transgranular

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11
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Susceptibles in ________

A

non PWHT

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12
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Good in PWHT by _____

A

1150 °F

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13
Q

Caustic Stress Corrosion Cracking (Caustic Embrittlement

Good material ______ based

A

nickel

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API 571 (17 decks)

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