Section 7 - Inspection Data, Analysis & Recording (API 570 pg 54-62) Flashcards
- Determine the corrosion rate occurring on a 12 NPS pipe based on this data.
Tmin 10/2016 4/2012 Thick 0.225" 0.270" 0.288"
A. 3.6 mpy (mils per year)
B. 4.0 mpy
C. 4.5 mpy
D. 10.0 mpy
E. 14.0 mpy
B. 4.0 mpy
- Determine the remaining life for an 8 NPS pipe based on the following data:Tmin 6/2003 6/2012 11/2016
0.344” 0.422” 0.395” 0.368”
(measurements are thickness readings)
A. 3 years
B. 4 years
C. 6 years
D. 9 years
B. 4 years
- Determine the remaining life for a 14 NPS pipe based on the following data:
Tmin 6/2016 6/2013 6/2008
0.466” 0.536” 0.557” 0.576”
(measurements are thickness readings)
A. 5 years
B. 7 years
C. 10 years
D. 14 years
E. 18.5 years
C. 10 years
- When the short-term and long-term corrosion rates differ significantly, who should determine which rate to use in the remaining life calculations?
A. the authorized inspector
B. The piping engineer
C. Both inspector and corrosion specialist
D. Either inspector or corrosion specialist
C. Both inspector and corrosion specialist
- Statistical analysis using point measurements on a piping system is not applicable to piping systems with:
A. Uniform internal corrosion
B. Predictable localized corrosion
C. High external corrosion rates
D. Significant unpredictable localized corrosion
D. Significant unpredictable localized corrosion
- Which of the following is NOT an acceptable way to establish the corrosion rate for a newly installed piping system?
A. Similar Service
B. Owner’s experience
C. Published data
D. Inspect after 5000 hours
D. Inspect after 5000 hours
- 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. Owner’s experience
C. Published data
D. Inspect after 3 months
A. Similar service
- For new piping, what is the preferred method to determine the probable corrosion rate?
A. Initial thickness readings after 3 months 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 data published in a trade journal
C. Data collected by the Owner/User on similar service piping systems
- Which of the following is the least desirable way to establish the corrosion rate for a newly installed piping system?
A. Similar service
B. Owner’s experience
C. Published data
D. Inspect after 3 months
D. Inspect after 3 months
- Determining MAWP 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 in code
D. Can be made only after PMI is done to determine material specification
C. Can be made by using the lowest grade material and joint efficiency in code
- When the MAWP for a piping system is recalculated, the wall thickness used in these computations shall be the actual wall thickness of the piping system: (open book)
A. Recorded by the last field measurement
B. minus the estimated corrosion loss before the next inspection date
C. Minus twice the estimated corrosion loss before the next inspection date
D. Plus the estimated corrosion loss before the next inspection date
E. Plus twice the estimated corrosion loss before the next inspection date
C. Minus twice the estimated corrosion loss before the next inspection date
- 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. Lesser of the pressure design thickness or structural minimum thickness
C. Greater of the pressure design thickness or structural minimum thickness
- 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
C. API 579
- 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
B. API 579
- Which of the following is not a concern about the flexibility of a piping system?
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
D. Decreasing pipe wall thickness
- 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
D. Piping stress analysis
- A pipe stress analysis can be helpful in predicting:
A. Expected corrosion rates
B. Pipe MDMT
C. Vibrations from pipe’s natural frequency
D. Temper-embrittlement of Low-Chrome steels
C. Vibrations from pipe’s natural frequency
- 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. Creep or fatigue
- Who is responsible to maintain piping records for piping systems covered under API 570?
A. Authorized inspector
B. Authorized inspector agency
C. Owner/User
D. Repair organization
C. Owner/User
- 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 Tminimum calculations
C. Person performing NDE examinations on piping systems
D. Person performing a repair
C. Person performing NDE examinations on piping systems
- Operation and maintenance records concerning a specific pipe system should be:
A. Available for review by the authorized inspector
B. filed in a central filing system with the inspection records
C. Maintained for 5 years
D. Maintained for the life of the pipe
A. Available for review by the authorized inspector
- A primary use of the inspection isometrics is to record:
A. CML locations
B. CML readings
C. Minimum required pipe thickness
D. Process parameters
A. CML locations
- Another primary purpose for the inspection isometrics is to:
A. Document the corrosion rates at specific CML’s
B. identify locations for recommended repairs
C. record inspection findings
D. Use as a substitute for P&IDs
B. identify locations for recommended repairs
- 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
D. Class 1-3 unit piping and Class 1 piperack piping
- The owner/User must have:
A. Access to a professional engineer
B. A direct hire authorized inspector
C. A system to tracking and review outstanding repair recommendations
D. Inspection isometrics of all piperack piping
C. A system to tracking and review outstanding repair recommendations
- When an external inspection is performed:
A. A report in a checklist format is recommended
B. A combined report with a checklist and written narrative is recommended
C. It must be performed by an API 570 inspector
D. It must include taking thickness readings
B. A combined report with a checklist and written narrative is recommended
- Per API 570, overdue inspections are:
A. Not allowed
B. Only allowed on low consequence piping
C. Only allowed on low risk piping
D. Allowed if process conditions do not allow for the pipe to be serviced by due date
A. Not allowed
- Per API 570, interval deferrals for a specific owner/ user:
A. Should be done in accordance to API 580
B. should only be an occasional occurrence
C. requires jurisdictional approval
D. are only allowed on Class 3 & 4 piping
B. should only be an occasional occurrence
- a simplified deferral is one that extends the interval:
A. for only class 3 or 4 piping
B. for only off-site piping
C. the lesser of 10% of the current interval or 6 months
D.the lesser of 10% of the current interval or 12 months
C. the lesser of 10% of the current interval or 6 months
- The current thickness interval is 8 years. This interval is being deferred for 4 months. Who must concur with this interval deferral?
A. Both the inspector and engineer
B. either the inspector or the engineer
C. both the engineer and operation’s management
D. either the engineer or operation’s management
E. both the inspector and operation’s management
E. both the inspector and operation’s management
- Which of the following is NOT a requirement for a regular deferral? (non-simplified)
A. Review current inspection plan to see if will need modifications
B. An MOC must be completed that supports the new deferral interval
C. A risk assessment must be completed that supports the deferral
D. The piping records are updated with the documentation supporting the deferral
E. review current Integrity Operation Windows to see if modifications are needed
B. An MOC must be completed that supports the new deferral interval
- An inspection interval is being deferred for 16 months. Who must concur with this deferral?
A. Both the inspector and engineer
B. both the engineer and operation’s management
C. either the engineer or operation’s management
D. both the inspector and operation’s management
D. both the inspector and operation’s management
- When can an inspector be the sole approver for interval deferrals?
A. Never
B. Interval is deferred no more than 6 months
C. interval is deferred no more than 12 months
D. interval is deferred the lesser of 6 months or 10% of the existing interval
E. interval is deferred the lesser of 12 months or 25% of the existing interval
A. Never
