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API 570 > 570 Study Guide - Section 7 - Insp Data Evaluation & Analysis > Flashcards

570 Study Guide - Section 7 - Insp Data Evaluation & Analysis Flashcards

1
Q

When the short-term and long-term corrosion rates differ significantly, who should determine which rate to use in the remaining life calculation?

A. The authorized inspector
B. The pressure vessel engineer
C. Both the authorized inspector and the corrosion specialist
D. Either the authorized inspector or the corrosion specialist

A

C. Both the authorized inspector and the corrosion specialist

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2
Q

Statistical analysis using single point measurements on a piping system is NOT applicable to piping systems with:

A. Uniform internal corrosion
B. Uniform internal erosion
C. High external corrosion rates
D. Significant unpredictable localized corrosion

A

D. Significant unpredictable localized corrosion

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3
Q

Which of the following is NOT an acceptable way to establish the corrosion rate for the new service of a newly installed piping system?

A. Similar service
B. Owner’s experience
C. Published data
D. Inspect after 5000 hours

A

D. Inspect after 5000 hours

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4
Q

The operating conditions on a piping system have changed. The inspector must obtain a probable corrosion rate for the new conditions. Which of the following is the preferred way to establish the corrosion rate for the new service?

A. Similar service
B. Owners experience
C. Published data
D. Inspect after 3 months

A

A. Similar service

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5
Q

For a new piping systems, what is the preferred method to determine the probable corrosion rate?

A. Initial thickness readings after 6 weeks of service
B. Owner/user’s experience gained at a research facility
C. Data collected by the owner/user on similar service piping systems
D. Corrosion rate data published in a trade journal

A

C. Data collected by the owner/user on similar service piping systems

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6
Q

Which of the following is the least desirable way to establish the corrosion rate for a newly installed piping system?

A. Similar service
B. Owners experience
C. Published data
D. Inspect after 3 months

A

D. Inspect after 3 months

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7
Q

Determining MA WP for a pipe system with unknown materials:

A. Is not allowed
B. Can only be done by the piping engineer
C. Can be made by using the lowest grade material and joint efficiency
D. Can be made only after PMI is done to determine material specification

A

C. Can be made by using the lowest grade material and joint efficiency

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8
Q

When the MA WP for a piping system is recalculated, the wall thickness used in these computations shall be the actual wall thickness of the piping system:

A. Recorded by the last field measurement
B. Minus the estimated corrosion loss before the date of the next inspection
C. Minus twice the estimated corrosion loss before the date of the next inspection
D. Plus the estimated corrosion loss before the date of the next inspection
E. Plus twice the estimated corrosion loss after the date of the next inspection

A

C. Minus twice the estimated corrosion loss before the date of the next inspection

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9
Q

The minimum required pipe wall thickness shall be the:

A. Pressure design thickness
B. Structural minimum thickness
C. Greater of the pressure design thickness or structural minimum thickness
D. Less of the pressure design thickness or structural minimum thickness

A

C. Greater of the pressure design thickness or structural minimum thickness

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10
Q

What code should be used to evaluate crack-like indications on an existing piping system?

A. API 570
B. API 578
C. API 579
D. API 580
E. ASME Section VIII Division 2
A

C. API 579

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11
Q

What code should be used to evaluate localized thin areas on an existing piping system?

A. API 571
B. API 579
C. API 598
D. API 2201`
E. ASME Section VIII Division 2
A

B. API 579

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12
Q

Which of the following factors does NOT increase the concern about piping system flexibility?

A. Long straight run with few changes in direction
B. Piping connected to mechanical equipment
C. Increasing the pipe diameter
D. Decreasing pipe wall thickness
E. Higher operating temperatures

A

D. Decreasing pipe wall thickness

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13
Q

What of the following is most helpful in identifying highly stressed piping components?

A. Shear wave UT
B. External inspections
C. Vibration monitoring
D. Piping stress analysis

A

D. Piping stress analysis

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14
Q

A pipe stress analysis can be helpful in predicting:

A. expected internal corrosion rates
B. Minimum design metal temperatures
C. Vibrations resulting from a pipe’s natural frequency
D. Temper-embrittlement of low chrome steel

A

C. Vibrations resulting from a pipe’s natural frequency

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15
Q

A pipe stress analysis can be helpful in concentrating inspection efforts when looking for:

A. Creep or fatigue
B. Fatigue or galvanic corrosion
C. Galvanic corrosion or liquid metal embrittlement
D. Liquid metal embrittlement or temper-embrittlement

A

A. Creep or fatigue

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16
Q

Who is responsible to maintain appropriate piping records for piping systems covered under API 570?

A. Authorized piping inspectors
B. Authorized inspection agency
C. Owner/user
D. Repair organization

A

C. Owner/user

17
Q

API 570 requires which of the following names to be documented in the equipment records?

A. Person performing piping rerate calculations
B. Person performing piping T-minimum calculations
C. Person performing NDE examination on piping systems
D. Person performing a repair

A

C. Person performing NDE examination on piping systems

18
Q

A 10 NPS piping system is being rerated. The pipe is made A106 gr B and has a design temperature of 750F. The pipe is corroding at 0.002 ipy. The current thickness is 0.297”. The next set of thickness measurements will be in 10 years. Determine the maximum rerated pressure for this piping system.

A. 491.7 psig
B. 638.8 psig
C. 686.7 psig
D. 690.5 psig
E. 742.2 psig
F. 919.0 psig
G. Who cares? I've made my money in the oil boom and I'm  ready to retire?
A

B. 638.8 psig

19
Q

A 12 NPS piping system is being rerated. The pipe is made of A. 106 gr C and has a design temperature of 400F. The pipe is corroding at 0.003 ipy. The current thickness is 0.206”. The next set of thickness measurements will be in 7 years. Determine the maximum rerated pressure for this piping system

A. 586.5 psig
B. 632.2 psig
C. 661.6 psig
D 736.8 psig

A

A. 586.5 psig

20
Q

The primary purpose of inspection isometrics is to record:

A. CML locations
B. CML readings
C. Minimum required pipe thickness
D. Process parameters

A

A. CML locations

21
Q

Inspection isometrics are recommended for:

A. All petrochemical piping
B. Class 1-3 unit piping
C. Class 1-2 unit piping and piperack piping
D. Class 1-3 unit piping and Class 1 piperack piping
E. Class 1-2 unit piping and Class 1 piperack piping

A

D. Class 1-3 unit piping and Class 1 piperack piping

22
Q

When an external inspection is performed:

A. An inspection narrative shall be completed
B. Either a written report or report using a checklist format shall be completed
C. It must be performed by an API 570 inspector
D. It must include taking thickness readings

A

B. Either a written report or report using a checklist format shall be completed

23
Q

When inspection deferrals are done, it must be accepted by the:

A. Authorized inspector
B. Corrosion specialist
C. Operations manager
D. Piping engineer

A

A. Authorized inspector

API 570 (13 decks)

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