API 653 Data Sheets-Time Intervals

Vacuum Box- Minimum duration of each vacuum-testing exam  650:  8.6.8

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

NDE- Final interpretation of a PT exam after application of developer (time range)

Testing- Minimum time to let oil penetrate when performing a diesel oil test to shell-to-bottom weld  

Testing- Minimum duration for a tank hydrotest to be held at full height

NDE- Max calibrating interval- MT magnetic yoke    V:  T-762.a

Intervals- Maximum interval- Routine in-service inspection   653:  6.3.1.2

CP- Maximum interval- Routine check of CP impressed current sources

NDE- Max calibrating interval- RT densitometer

Reconstruction- Maximum allowed age of last thickness readings, used to design a reconstructed tank  653:  8.4.1

Weld Qualification- Maximum time- welder or operator maintains qualifications for a welding process without using that process

CP- Maximum interval- Detailed check of CP impressed current facilities 651:  11.3.2.3

CP- Maximum interval- CP surveys (field potential measurements)  651:  11.3.1.2

NDE- Minimum time- To keep RT's acquired during tank repairs and reconstructions

Vac Box- Max test interval- Jaeger 2 eye test for VB oper   650:  8.6.4.a

NDE- Max test interval- Jaeger 2 eye test for PT/MT tech   650:  8.2.3/8.4.3

AI- Time period between API AI recertification

Intevals- Maximum interval- UT readings of a tank shell when the corrosion rate is unknown

Intervals- Maximum interval- External inspection   653:  6.3.2.1

AI- Time period between API AI on-line recertification   653:  D.5.3

Intervals- Maximum interval- Initial internal inspection (without RBI or other special situations)   653:  6.4.2.1.1

RBI- Maximum interval- RBI reassessments 

Intervals- Maximum interval- UT readings of a tank shell when the corrosion rate is known

Intervals- Maximum interval- Internal inspection when the corrosion rate is known (without RBI assessment)   653:  6.4.2.2.1

Linings- Typical life of a properly applied tank lining    652:  6.2.2.c & 6.3.2.i

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)