API 653 Data Sheets-Time Intervals

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  1. Vacuum Box- Minimum duration of each vacuum-testing exam  650:  8.6.8
    5 seconds
  2. NDE- Minimum time an examiner should be in a darkened area prior to using a black light for MT & PT exams     V:  T-676.4.b & T-777.2.b
    5 minutes
  3. NDE- Final interpretation of a PT exam after application of developer (time range)
    • V: T-676.1
    • 10-60 minutes
  4. Testing- Minimum time to let oil penetrate when performing a diesel oil test to shell-to-bottom weld  
    • 650:  7.2.4.1.d & 653:  12.1.6.1
    • 4 hour
  5. Testing- Minimum duration for a tank hydrotest to be held at full height
    • 653:  12.3.1
    • 24 hour
  6. NDE- Max calibrating interval- MT magnetic yoke    V:  T-762.a
    Daily (prior to use)
  7. Intervals- Maximum interval- Routine in-service inspection   653:  6.3.1.2
    1 month
  8. CP- Maximum interval- Routine check of CP impressed current sources
    • 651:  11.3.2.2
    • 2 months
  9. NDE- Max calibrating interval- RT densitometer
    • V: T-262.1
    • 90 days
  10. Reconstruction- Maximum allowed age of last thickness readings, used to design a reconstructed tank  653:  8.4.1
    180 days
  11. Weld Qualification- Maximum time- welder or operator maintains qualifications for a welding process without using that process
    • IX:  QW-322.1.a
    • 6 months
  12. CP- Maximum interval- Detailed check of CP impressed current facilities 651:  11.3.2.3
    1 year
  13. CP- Maximum interval- CP surveys (field potential measurements)  651:  11.3.1.2
    1 year
  14. NDE- Minimum time- To keep RT's acquired during tank repairs and reconstructions
    • 653:  13.2.3.d
    • 1 year
  15. Vac Box- Max test interval- Jaeger 2 eye test for VB oper   650:  8.6.4.a
    1 year
  16. NDE- Max test interval- Jaeger 2 eye test for PT/MT tech   650:  8.2.3/8.4.3
    1 year
  17. AI- Time period between API AI recertification
    • 653: D.5.1
    • 3 year
  18. Intevals- Maximum interval- UT readings of a tank shell when the corrosion rate is unknown
    • 653:  6.3.3.2.a
    • 5 year
  19. Intervals- Maximum interval- External inspection   653:  6.3.2.1
    lesser of 5 year of 1/4 life
  20. AI- Time period between API AI on-line recertification   653:  D.5.3
    6 year
  21. Intervals- Maximum interval- Initial internal inspection (without RBI or other special situations)   653:  6.4.2.1.1
    10 years
  22. RBI- Maximum interval- RBI reassessments 
    • 653:  6.4.2.2.2
    • 10 years
  23. Intervals- Maximum interval- UT readings of a tank shell when the corrosion rate is known
    • 653:  6.3.3.2.b
    • lesser of 15 year of 1/2 life
  24. Intervals- Maximum interval- Internal inspection when the corrosion rate is known (without RBI assessment)   653:  6.4.2.2.1
    20 yr of full bottom life
  25. Linings- Typical life of a properly applied tank lining    652:  6.2.2.c & 6.3.2.i
    > 20 years
  26. NDE- Max calibrating interval- Check the light intensity of a black light used in a MT or PT exam    V: T-676.4(e) & T-777.2(e)
    Before and after use

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API 653 Data Sheets-Time Intervals
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2017-01-05 21:56:27
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API 653 Data Sheets-Time Intervals
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