API 653 Data Sheets & Who Dats

Linings- Typically anchor profile of steel surface required for the installation of a tank bottom lining   652:  7.5

Welds- Maximum undercut of a vertical weld & nozzle weld   650:  8.5.2.b

Welds- Maximum undercut of a horizontal weld650:  8.5.2.b

Welds- Maximum diameter of a surface porosity cluster   650:  8.5.2.c

Weld Qualification- Max allowed discontinuity in a bend test  IX:  QW-163

Nameplates- Minimum size of name plate letters   650:  10.1.1 &  653:  13.1.1.1

Bottoms- Minimum external projection of bottom plate on an existing tank (from toe of shell-to-bottom FW)  653:  4.4.5.7

Reconstruction- Max amount of peaking allowed in vertical welds  653:  10.5.4

Shell Calcs- When calculating tmin for shell LTA, minimum distance away from a weld where "E" is always 1.0   653:  4.3.3.1 (definitions)

Shell Patch- Minimum overlap of shell lap-patch used to cover a hole (edge of hole to edge of patch)   653:  9.3.2.3

NDE- When performing a PT examination, minimum distance to clean beyond the area to be examined     V: T-642.b

NDE- When performing a MT examination, minimum distance to clean beyond the area to be examined   V:  T-741.1.b

Reconstruction- Maximum amount of banding allowed in a horizontal weld   653:  10.5.5

Bottoms- Minimum overlap required for single-welded lap joints   650:  5.1.3.5

Bottoms- Minimum external projection of bottom plate on a new tank   650:  5.4.2

Vacuum Box- Minimum overlap of previously test surfaces when using a vacuum box 650:  8.6.5

Bottom Patch- Minimum overlap of bottom lap-patch fillet weld to the nearest existing bottom weld   653:  Fig. 9.13

Bottom Patch- Minimum distance bottom lap-patch fillet weld to the nearest existing bottom weld   653:  Fig. 9.13

Shell Patch- Minimum radius of a shell lap-patch   653:  9.3.1.4

Reconstruction- If reusing bottom plates, minimum distance to cut from existing bottom welds (if plates are not deseamed) 653:  10.3.2.1

Reconstruction- If reusing roof plates, minimum distance to cut from existing roof welds (if plates are not deseamed) 653:  10.3.4.1

Shell Pitting- Maximum allowed vertical length of pits on a tank shell   653:  4.3.2.2.b

Bottom Pitting- Maximum allowed length of pits in the critical zone that can be repaired by weld-buildup   653:  9.10.1.6.a

Bottoms- Radial length of critical zone measured from shell   653:  3.10

Bottoms- Suggested sand pad thickness 650:  B.3.2

Welds- Minimum distance between clusters of surface porosity  650:  8.5.2.c

Shell Patch- Minimum dimension of a shell lap-patch    653:  9.3.1.7

Shell Patch- Minimum radius of a shell flush-patch   653:  Fig. 9.1 "R" dimension

Shell Calcs- When calculating tmin for shell LTA, minimum distance away from the rivet where "E" is always 1.0  653:  4.3.4.1

Bottom Patch- Minimum size of bottom lap-patch that does NOT cross a bottom seam 653:  9.10.1.1.b

Bottom Patch- Minimum distance between a bottom lap-patch and the shell for patches that do NOT extend to the shell   653:  Fig. 9.13 or 9.10.1.2.b

Reconstruction- If reusing shell plates, minimum distance to cut from existing shell welds (if plates are not deseamed) 653:  10.3.3.1.c

RT- Minimum diagnostic length of a RT for vertical or horizontal welds  650:  8.1.2.8
653:  12.2.1.7

Weld Qualify- Minimum weld length when qualifying a welder with RT/UT using a coupon or 1st production weld  
IX:  QW-302.2
IX:  QW-304.1

Weld Qualify-Minimum weld length when qualifying a welding operator with RT/UT of a test coupon  IX:  QW-302.2

Shell Patch- Minimum distance to overlap a shell weld when using a lap-patch
653:  9.3.1.5

Corrosion- Area to dig when checking for soil-to-air corrosion   575:  8.2.10

NDE- Distance of eye-to-part to count as visual exam   577:  9.3.1.e

Vacuum Box- Typical size of a vacuum box
650:  8.6.1

Shell Patch- Minimum dimension of a shell flush-patch    653:  9.2.2.1

Bottoms- Minimum dimension that a 3-lap joint can be from: other 3-laps, the shell, or annular plate joints  650:  5.1.5.4.2

Bottom Patch- Minimum dimension of bottom lap-patch that crosses a bottom seam
653:  9.10.1.1.a

Foundations- Suggested height above grade for new tank bottoms  650:  B.3.1

Shell Patch- When adding a shell flush-patch that extends to a horizontal shell weld, minimum distance to cut the horizontal weld past the new vertical welds 
653:  Fig. 9.1 note 2

Shell Patch- Dimension of a shell flush-patch that is considered either a major repair or alteration  653:  3.20.c

Definition- Dimension of a shell vertical weld if repaired or replaced is considered a major repair of major alteration  653:  3.20.e

Bottom Patch- Maximum width of bottom patch in the critical zone
 653:  Fig. 9.13 note 3

Bottoms- Minimum radial width of annular plate (distance between shell and nearest bottom fillet weld)  650:  5.1.5.4.3 & 5.5.2

NDE- Maximum distance of eye-to-part to count as visual exam  575:  9.2.1

Hot Tap- Minimum height of liquid above new nozzle during the hot tap operation
653:  9.14.1.2

Weld Qualify- minimum weld length when qualifying a welding operator with RT/UT of first production weld  IX:  QW-305.1

NDE- Length of sweep board used when checking for banding or peaking 
653:  10.5.4/5

Welds- Maximum distance between welder ID stamps on a tank weld 
650:  9.4  
653:  11.2.2

Shell Patch- Maximum size of shell lap-patch (vertical & horizontal dimensions)
653:  9.3.1.7

Settlement- Maximum distance between tank settlement survey points across the inside of the tank  653:  Fig. B.2

Roofs- Maximum shunt spacing on floating roof
650:  C.3.1.6

CP- Typical tank size for Galvanic CP systems
651:  6.2.1

Settlement- Maximum distance between tank settlement survey points around the outside diameter of the tank  653:  Fig. B.1/12.5.2

NDE- Maximum distance between RT's in horizontal welds when welding to existing shell plates  653:  12.2.1.2.b & c

Shell Calcs- Tank diameter when Variable Point Design method should always be used to calc shell minimum thickness  653:  4.3.3.4

Shell- Minimum offset between vertical welds in adjacent courses  650:  5.1.5.2.b

Bottoms- Minimum size of bottom welds
650:  5.1.5.4.3

Reconstructed- Maximum allowed out-of-plumbness    653:  10.5.2.1

Corrosion- pH level that causes corrosion to increase     651:  5.3.2.1.g

Corrosion- Chloride level where pitting on steel begins    651:  5.3.2.1.h

NDE- Weight used to check magnetic strength of an AC yoke    V:  T-762.b

Grounding- Maximum electrical resistance permitted from tank to earth   575:  8.2.5

NDE- Min angle of eye-to-part to count as a visual exam   
575:  9.2.1
577:  9.3.1

NDE- Weight used to check magnetic strength of a DC yoke  V:  T-762.c

NDE- Minimum light intensity when performing non-fluorescent MT or PT exams
V:  T-676.3 & T-777.1

Vacuum box- Minimum light intensity when performing vacuum testing  650:  8.6.7

NDE- Minimum black light intensity when performing fluorescent MT or PT exams
V:  T-676.4.c  & T-777.2.c

Brittle- Shell stress when brittle fracture is NOT a concern   653:  Fig 5.1

NDE- Hole size that must be visible in RT when using a hole-type IQI   V:  Tbl-276

Weld Qualification- Maximum allowed thickness on a WPS based on plate thickness (T) of a PQR test coupon  IX:  QW 451.1

Weld Qualification- The "all position" test coupon    IX:  QW 461.9

NDE- Lead letter used during RT to check for backscatter radiation  V:  T-223

NDE- Lead letter used during RT to indicate a film-side IQI  V:  T-277.b

NDE- Lead letter used during RT to indicate a repaired weld    653:  12.2.3.2

Repairs- Material where pre-heat can be substituted for a required PWHT
653:  11.3.1.a

Repairs- Materials where control deposition welding can be substituted for a required PWHT  653:  11.3.2.a

Hot Taps- Nozzle thickness for hot tapped nozzles   653:  Fig 9.14

Repairs- Welding processes that can be used when substituting Preheat or Controlled Deposition welding for a required PWHT
653:  11.3.1.b
653:  11.3.2.b

Corrosion- In a corrosion cell, the part that corrodes   651:  4.1.1.a

Corrosion- In a corrosion cell, the part that doesn't corrode   651:  4.1.1.b

Linings- Minimum surface prep prior to applying lining    652:  7.1

Weld Qualification- Rejectable in RT when qualifying a welder  IX:  QW 191.1.2.2.a.1

Weld Qualification- Which welding process can a welder NOT be qualified by RT/UT
IX:  QW-304

Welding- Variable needed on WPS
IX:  QW 200.1.b

Welding- Variable needed on PQR
IX:  QW 200.2.a

Roofs- Maximum amount of primary seal that can be removed for repair while tank is still in service   653:  9.13.1

NDE- Minimum number of RT's required on a circular shell replacement plate 
653:  12.2.1.6.1

FFS- Current joint efficiency "E" in API 650
653:  Table 4.2

FFS- Joint efficiency "E"- Calculating tmin  for an LTA, when LTA is away from rivets by ≥ 6"
653:  4.3.4.1

FFS- Joint efficiency "E"- Calculating tmin for an LTA, when LTA is away from weld by greater of: 1" of 2t   653:  4.3.3.1"E" defined

Reconstruction- Number of sets of center punch marks located on top and bottom edges of each shell piece    653:  10.3.5.2

Weld Qualification- Number of tension test to qualify a WPS   IX: QW 451.1

Weld qualification- Number of bend tests to qualify a welder or welding operator in welding positions 1G-4G   IX:  QW 452.1.a

NDE- Minimum # of exposures to RT 360° of a weld using a double-wall technique, double-wall view (elliptical shot)  V: T-271.2.b.1

NDE- RT film density range-allowed for the weld & IQI when using a gamma ray source
V: T-282.1

NDE- Minimum # of exposures to RT 360° of a weld using a double-wall technique, single wall view   V: T-271.2.a

Impact Test- Number of test bars required in each set of impact test specimens
650:  4.2.9.3

NDE- When using a shim under a hole-type IQI, the number of sides of the IQI that must be seen in the RT image  V: T-277.3

Hot tap- minimum number of UT readings around the circumference of a new hot tapped nozzle    653:  9.14.3.2

Weld Qualification- Number of bend tests to qualify a WPS  IX: QW 451.1

Weld Qualification- Number of bend tests required to qualify a welder in welding positions 5G & 6G  IX:  QW 452.1.a Note 1

FFS- Corrosion averaging in a shell LTA- Minimum # of UT readings to take on each designated vertical line   653:  4.3.2.1.c

NDE- Minimum number of RT's required on a square or rectangular shell replacement plate
653:  12.2.1.6.2

Settlement- Minimum number of settlement points around circumference
653:  12.5.2 & Fig B.1

Typical minimum upward slope of a tank bottom   650:  5.4.4

Minimum slope of cone roof tank (for water runoff)   650:  5.10.4.1

Maximum roof slope on tanks ≥ 50' diameter (if roof is considered to be fragile) 
650:  5.10.2.6.a.1

Maximum taper (steepest slope) allowed for a shell insert plate   
650:  5.7.1.7
653:  9.8.4.a

Scope- Maximum internal pressure for tanks in API 650 & 653    650:  F.1.3 & 575:  3.3

Vacuum Box- Normal vacuum required when vacuum testing   650:  8.6.3

Pressure Test- Pressure used when air testing the shell-to-bottom weld (air between bottom fillet welds)  650: 7.2.4.2    & 653:  12.1.6.2

Pressure Test- Pressure used when air testing a repad    650:  7.3.4

Scope- Maximum internal pressure for tanks in API 620   575: 4.3.2

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)
V: T-676.1

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

Testing- Minimum duration for a tank hydrotest to be held at full height
653:  12.3.1

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
651:  11.3.2.2

NDE- Max calibrating interval- RT densitometer
V: T-262.1

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
IX:  QW-322.1.a

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
653:  13.2.3.d

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
653: D.5.1

Intevals- Maximum interval- UT readings of a tank shell when the corrosion rate is unknown
653:  6.3.3.2.a

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 
653:  6.4.2.2.2

Intervals- Maximum interval- UT readings of a tank shell when the corrosion rate is known
653:  6.3.3.2.b

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)

Reconstruction- Base metal temp where welding is no allowed 653:  10.4.2.3

Reconstruction- Base metal temp when hand-warm pre-heat is required  653:  10.4.2.3

Linings- Minimum temp when installing tank bottom linings   652: 8.3

Corrosion- The corrosion rate of steel tank bottoms may double with this rise in temperature  651:  5.4.1 Note

UT Calibration- Calibration block must be within what temperature of the part to be examined   577:  9.9.3.1

Vacuum Box- Standard temperature range for VB exam    650:  8.6.6

PT- Standard temperature range for a PT exam
V:  T-652/653

Impact test- Design metal temperature that requires weld procedure used for vertical welds to be impact tested    650:  9.2.2.3

Brittle- Tank metal temperature where brittle fracture is NOT a concern  653:  Fig 5.1

Bottom Lap patches- Metal temp where lap-patches are NOT allowed in critical zone on SS tank   653:  9.10.1.2.3

Intervals- If tank products solidify below this temperature, the code maximum interval rules do not apply    653:  6.4.2.1.2.1

Preheat- Approximate temp of a required hand-warm pre-heat   653:  10.4.2.3

Corrosion- Temperature when high strength caustic causes serious corrosion in CS and 300 SS     571:  4.3.10.6c       575:  8.4.3

Preheat- Required pre-heat temperature for shell welds over 1.5" thick during reconstruction    653:  10.4.4.3

Bottom lap patches- Metal temperature where lap-patches are NOT allowed in the critical zone on CS tanks   653:  9.10.1.2.3

Temperature range for API 650 App M
650:  1.1.20

Corrosion- Most aggressive temperature range for CUI. Range for API 575 and API 571
575:  8.2.7
571:  4.3.3.3.b

Preheat- Minimum pre-heat temperature, when pre-heat is substituted for PWHT
653:  11.3.1.d

Maximum temperature for UT readings
V:  SE-797 9.5

PWHT temperature   650:  5.7.4.1/2

Welding- CS HAZ- Base metal that did NOT melt but exceeded this temp during welding
577: 10.2.4

NDE- Limits of RT film density of weld as compared to IQI (range)  V:  T-282.2.a.1

AI- Amount of time inspector must be involved in inspection activities- required to maintain API 653 certification  653:  D.5.2.a

RT Reconstruction- % to of weld instersections (new welds to old welds) to be RT'd
653:  12.2.1.5

Maximum relative humidity when installing tank bottom linings  652:  8.3

% to RT when installing a new insert plate with a nozzle into an existing shell plate
653:  12.2.1.8

Repad-Nozzle size that never requires a repad
650:  5.7.2.1

Repairs- On existing tanks, new nozzle must use insert plate if shell is over 1/2" thick and shell material does not meet current MDMT requirements       653:  9.8.6

RT- Maximum pipe size when using RT elliptical shot (double-wall technique, double wall view)    V:  T-271.2.b

Hot tap- Maximum nozzle size that can be hot tapped when course thickness is > 1/2" and shell has unknown toughness  
653:  9.14.1.1.b.1

Definition- When adding a new nozzle, nozzle size to be considered a major alteration
653:  3.20.a

Fitness for Service (FFS) 653: 1.1.6

Risked Based Inspection  653: 6.4.2.2.2

Low Pressure Storage Tanks   653:  2.1

Cathodic Protection     653:  6.3.4.1

Tank Bottom Linings     653:  4.4.3.4

Welding on In-Service equipment containing flammables   653:  9.14.2

NDE procedure guidelines    650:  8.1.3.1, 8.2.1, 8.3.2.2, 8.4.1

Acceptance standards for RT, MT, & PT's of welds     650:  8.1.5, 8.2.4, 8.4.4

Alternative code to evaluate pits and LTA's   653:  4.3.3.6

Welder qualification code    653:  11.1.1

Weld procedure qualification code    
653:  11.1.1

Impact testing method and equipment requirements    650:  4.2.9.4, 4.2.9.7

Requirement for new welding electrodes
653:  7.4

NDE personnel qualification (RT & UT flaw detection)  650: 8.1.3.2, 8.3.2.4

API 650 annex for frangible roofs  
653:  4.2.4.1

API 650 annex for hot tanks
653:  4.2.4.3

Overall responsibility for compliance with API 653         1.2

Evaluate deterioration on existing shell material          4.3.1.2

In a corroded area, find t2 (thinnest area exclusive of pit)        4.3.2.1.a

In a corroded area, determine the vertical lines (L)                    4.3.2.1.c

Determine MFL Threshold          4.4.5.1 Note 1

Perform the Routine In-Service inspection 6.3.1.1

Perform the external inspection 6.3.2.1

Determine the extent of UT measurements on the shell                   6.3.3.1

Review the results of CP surveys        6.3.4.1

Assure competency of personnel performing CP surveys              6.3.4.2

Perform the Internal inspection      6.4.1.2

Choose the RBI to set Internal interval   6.4.2.2.2

Conduct an RBI assessment       6.4.2.2.2

Review and approve RBI reassessments every 10 years        6.4.2.2.2

Maintain tank records        6.8.1

Prepare report after each external & internal inspection         6.9.1

Maintain inspection reports & recommendations for life of tank    6.9.1

Review inspection findings and recommendations     6.9.3.2

Ensure disposition of all recommended repairs and monitoring        6.9.3.2

Evaluate and accept NDE examination results 6.10

Authorize all repairs     9.1.3

Authorize all alterations      9.1.3

Designate inspection hold points for repairs, alterations, & reconstructions       9.1.3

Provide general authorization for limited routine repairs       9.1.3

Approve all proposed methods of design, materials. WPSs. NDE & testing     9.1.4

Approve all repair, alteration and reconstruction work at hold points     9.1.4

Approve all repair, alteration, & reconstruction work at completion of work     9.1.4

Review & approve the use of non-code specified lap patches on bottom    9.10.1.3

Approve lap patch in critical zone if bottom thickness is less than 0.100"    9.10.1.6.b

Run the hot tap machine      9.14.5.4

Authorize all reconstruction work      10.1.3

Review the use of Pre-heat of controlled deposition welding in lieu of PWHT   11.3

Concur in writing use PWHT alternative for materials of unknown toughness   11.3

Review and approve exempting a hydro after a major repair or alteration    12.3.2.2

Authorize FFS evaluation to exempt a hydro after major repair or alteration    12.3.2.7

Perform FFS evaluation to exempt a hydro after major repair or alteration      12.3.2.7

Tank w/o nameplate, oversee attachment of new nameplate    13.1.2.2/3

Perform tank settlement survey   B.2.1

Do rigorous stress analysis for floor settlement exceeding 653 limits    B.3.2/3.2.4

Verify if floor scans are following the examination procedure     G.3.1

Perform qualification tests for floor scanning examiners           G.4.6

Perform similar service assessments    H.1

Roof-Minimum thickness of new roof plate (cone & floating)
650:  5.10.2.2 & C.3.3.2
635:  9.11.2.1 & 9.11.3.1

Linings-Thickness of a thin film lining
652: 3.26

Bottom-Normal minimum thickness of new bottom plate
650:  5.4.1

Brittle-Thickness when brittle fracture is NOT a concern
653:Fig 5.1

Bottom-Minimum allowed bottom plate thickness away from critical zone or an annular plate
653: Table 4.4

Shell patch-Maximum patch thickness for a shell lap-patch
653: 9.3.1.3

Weld qualification-When can UT be used in lieu of RT to qualify a welder/welding operator
IX: QW-191.2.1.a

Shell-Minimum arbitrary shell thickness (used when calculated minimum thickness is below this number)
653: 4.3.3.1

NDE-Plate thickness which requires 100% of vertical welds to be radiographed
650: 8.1.2.2.c

NDE-When welding existing shell plate. Thickness that requires 100% examination by RT and MT or PT
653: 12.1.5.1

Bottom patch-Maximum thickness of lap-patch in critical zone
653: 9.10.1.2.a

Roofs-Minimum allowed average thickness of corroded roof plate
653: 4.2.1.2

Shell patch-Maximum shell thickness when lap-patches are allowed
653: 9.3.1.2

Bottom-Minimum allowed plate thickness in critical zone that can be repaired by weld-buildup
653:9.10.1.6.b

Bottom-Minimum allowed bottom plate thickness when there is a means to detect and contain a leak
653: Table 4.4

Bottom-Minimum allowed thickness of bottom plate at toe of the external shell-to-bottom fillet weld
653: 4.4.5.7

Shell Pits-Minimum remaining thickness allowed below a pit
653: 4.3.2.2.a

Bottom-Minimum allowed bottom plate thickness when there is a reinforced liner that is > 0.050" thick
653: Table 4.4

Roof rim-Minimum allowed roof rim thickness
653: 9.13.6.2

Reconstruction-Shell plate thickness that requires all welds to be pre-heated to at least 200° F
653: 10.4.4.3

Roof rim-minimum thickness of new roof rim
653: 9.13.6.2