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API 653 Exam Prep

  1. Reference - Fitness for Service (FFS)
    API 579
  2. Reference - Risked Based Inspection
    API 580
  3. Reference - Low Pressure Storage Tanks
    API 620
  4. Reference - Cathodic Protection
    API 651
  5. Reference - Tank Bottom Linings
    API 652
  6. Reference - Welding on In-Service Equipment containing Flammables
    API 2201
  7. Reference - NDE Procedure Guidelines
    ASME Sect V
  8. Reference - Acceptance Standards for RT’s of Welds
    ASME Sect 8, Div 1
  9. Reference - Alternative evaluation for pits and LTA’s
    ASME Sect 8, Div 2
  10. Reference - Welder Qualification
    ASME Sect IX
  11. Reference - Weld Procedure Qualification
    ASME Sect IX
  12. Reference - Impact
    Testing Method and Equipment Requirements
    ASTM A370
  13. Reference - Requirement for new welding electrodes
    AWS
  14. Reference - NDE Personnel Qualification  (RT & UT Flaw Detection)
    ASNT SNT-TC-1A
  15. Reference - API 650 Appendix for Frangible Roofs
    Appendix F
  16. Reference - API 650 Appendix for Hot Tanks
    Appendix M
  17. Definition - API 653 Scope
    • Alteration, Inspection,
    • Repair, Reconstruction (AIRR)
    • 653:1.1.1
  18. Definition - API 653 AI’s Employer
    • Jurisdiction, User, Insurance company, Contractor (JUIC)
    • 653:3.3
  19. Definition - API 653 Repair Organization
    • Jurisdiction, Owner, Contractor (JOC)
    • 653: 3.3
  20. Major Repair - Length of shell-to-bottom weld that if repaired is considered a major repair or alteration
    • >0"
    • 653: 3.18.g
  21. Linings - Typically anchor profile of steel surface required for the installation of a tank bottom lining
    • 1.5 – 4.0 mils
    • 652: 7.5
  22. Welds - Maximum undercut of a vertical weld & nozzle weld
    • 1/64”
    • 650: 8.5.2.b
  23. Welds - Maximum undercut of a horizontal weld
    • 1/64”
    • 650: 8.5.2.b
  24. Welds - Maximum diameter of a surface porosity cluster
    • 3/32”
    • 650: 8.5.2.c
  25. Weld Qualification - Max allowed discontinuity in a Bend Test
    • 1/8”
    • IX: QW-163
  26. Nameplates - Minimum size of nameplate letters
    • 5/32”
    • 650:10.1.1 
    • 653: 13.1.1
  27. Bottoms - Minimum external projection of bottom plate on an existing tank (from toe of shell-to-bottom FW)
    • 3/8”
    • 653:4.4.5.7
  28. Reconstruction - Max amount of peaking allowed in vert welds
    • 1/2”
    • 653:10.5.4
  29. Shell Calcs – When calculating tmin for shell LTA, minimum distance away
    from a weld where “E” is always 1.0
    • >1” or 2t
    • 653:4.3.3.1 (definitions)
  30. Shell Patch - Minimum overlap of shell lap-patch used to cover a hole (edge of hole to edge of patch)
    • 1”
    • 653: 9.3.2.3
  31. NDE - When performing a PT examination, minimum distance to clean beyond the area to be examined
    • 1”
    • V: T-642.b
  32. NDE - When performing a MT examination, minimum distance to clean beyond the area to be examined
    • 1”
    • V:T-741.1.b
  33. Reconstruction - Maximum amount of banding allowed in a horizontal welds
    • 1”
    • 653: 10.5.5
  34. Bottoms - Minimum overlap required for single-welded lap joints
    • 1”
    • 650: 5.1.3.5
  35. Bottoms - Minimum external projection of bottom plate on a new tank
    • 2”
    • 650:5.4.2
  36. Vacuum Box - Minimum overlap of previously test surfaces when using a vacuum box
    • 2”
    • 650:8.6.5
  37. Bottom Patch - Minimum overlap of bottom lap-patch used to cover corroded area (edge of corrosion to edge of patch)
    • 2”
    • 653:Fig. 9.13
  38. Bottom Patch - Minimum distance bottom lap-patch fillet weld to the nearest existing bottom weld
    • 2"
    • 653: Fig. 9.13
  39. Shell Patch - Minimum radius of a shell lap-patch
    • 2"
    • 653: 9.3.1.4
  40. Reconstruction - If reusing bottom plates, min distance to cut from existing bottom welds (if plates are not deseamed)
    • 2"
    • 653: 10.3.2.1
  41. Reconstruction - If reusing roof plates, min distance to cut from existing roof welds (if plates are not deseamed)
    • 2"
    • 653:10.3.4.1
  42. Shell Pitting - Maximum allowed vertical length of pits on a tank shell
    • 2” in 8” line
    • 653:4.3.2.2.b
  43. Bottom Pitting - Maximum allowed length of pits in the critical zone that can be repaired by weld-buildup
    • 2” in 8” line
    • 653:4.3.2.2.b
  44. Bottoms - Radial length of critical zone measured from shell
    • 3”
    • 653: 3.10
  45. Bottoms – Suggested pad thickness
    • 3-4”
    • 650: B.3.2
  46. Welds - Min distance between clusters of surface porosity
    • 4”
    • 650: 8.5.2.c
  47. Shell Patch - Minimum dimension of a shell lap-patch
    • 4”
    • 653: 9.3.1.7
  48. Shell Patch - Minimum radius of a shell flush-patch
    • 6”
    • 653: Fig 9.1 “R” dimension
  49. Shell Calcs – When calculating tmin for shell LTA, minimum distance away from a rivet where “E” is always 1.0
    • 6”
    • 653: 4.3.4.1
  50. Bottom Patch - Minimum size of bottom lap-patch that does NOT cross a bottom seam
    • 6”
    • 653: 9.10.1.1.b
  51. Bottom Patch - Minimum distance between a bottom lap-patch and the shell for patches that do NOT extend to the shell
    • 6”
    • 653: Fig 9.9 or 9.10.1.2.b
  52. Reconstruction - If reusing shell plates, min distance to cut from existing shell welds (if plates are not deseamed)
    • 6”
    • 653: 10.3.3.1.c
  53. RT - Minimum diagnostic length of a RT for vertical or horizontal welds
    • 6”
    • 650: 8.1.2.8  
    • 653: 12.2.1.7
  54. Weld Qualification - Minimum length of RT when qualifying a welder with RT using a coupon or 1st production weld
    • 6”
    • IX: QW-302.2
    • IX: QW-304.1
  55. Weld Qualification - Minimum length of RT when qualifying a welding operator with RT of a test coupon
    • 6”
    • IX: QW-302.2
  56. Shell Patch – Minimum distance to overlap a shell weld when using a lap-patch
    • 6”
    • 653: 9.3.1.5
  57. Corrosion – Area to dig when checking for soil-to-air corrosion
    • 6 – 12”
    • 575: 7.2.10
  58. NDE – Distance of eye-to-part to count as a Visual Exam
    • 6 - 24”
    • 577: 9.3.1.e
  59. Vacuum Box - Typical size of a vacuum box
    • 6” x 30”
    • 650: 8.6.1
  60. Shell Patch - Minimum dimension of a shell flush-patch
    • 12”
    • 653: 9.2.2.1
  61. Bottoms - Minimum dimension that a 3-lap joint can be from: other 3-laps, the shell, or annular plate joints
    • 12”
    • 650: 5.1.5.4.2
  62. Bottom Patch - Minimum dimension of bottom lap-patch that crosses a bottom seam
    • 12”
    • 653: 9.10.1.1.a
  63. Foundations - Suggested height above grade for new tank bottoms
    • 12”
    • 650: B.3.1
  64. 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
    • 12”
    • 653: Fig 9.1 Note 2
  65. Shell Patch - Dimension of a shell flush-patch that is considered either a major repair or alteration
    • > 12”
    • 653: 3.19.c
  66. Definition - Dimension of a shell vertical weld if repaired or replaced is considered a major repair or alteration
    • > 12”
    • 653: 3.19.e
  67. Bottom Patch – Max width of bottom patch in the critical zone
    • 24”
    • 653: Fig 9.13 Note 3
  68. Bottoms - Minimum radial width of annular plate (distance between shell and nearest bottom fillet weld)
    • 24”
    • 650: 5.1.5.4.3 & 5.5.2
  69. NDE – Max distance of eye-to-part to count as a Visual Exam
    • 24”
    • 575: 8.2.1
  70. Hot Tap - Minimum height of liquid above new nozzle during the hot tap operation
    • 36”
    • 653: 9.14.1.2
  71. Weld Qualification - Minimum length of RT when qualifying a welding operator with RT of first production weld
    • 36”
    • IX: QW-305.1
  72. NDE - Length of sweep board used when checking for banding or peaking
    • 36”
    • 653: 10.5.4 / 5
  73. Welds - Maximum distance between welder ID stamps on a tank weld
    • 36”
    • 650: 9.4  
    • 653: 11.2.2
  74. NDE - Length of sweep board used when checking for banding or peaking
    • 36”
    • 653: 10.5.4 / 5
  75. Shell Patch - Maximum size of shell lap-patch (vertical & horizontal dimensions)
    • 48” x 72”
    • 653: 9.3.1.7
  76. Settlement - Maximum distance between tank settlement survey points across the inside of the tank
    • 10’
    • 653: Fig B.2
  77. Roofs – Maximum shunt spacing on floating roof
    • 10’
    • 650: C.3.1.6
  78. Settlement - Maximum distance between tank settlement survey points around the outside diameter of the tank
    • 32’
    • 653: Fig B.1 / 12.5.1.2
  79. NDE - Maximum distance between RT’s in horizontal welds when welding to existing shell plates
    • 50’
    • 653: 12.2.1.2 b&c
  80. CP – Typical tank size for Galvanic CP systems
    • < 60’
    • 651: 6.2.1
  81. Shell Calcs - Tank diameter when variable point design method should always be used to calc shell minimum thickness
    • > 200’
    • 653: 4.3.3.4
  82. Shell – Minimum offset between vertical welds in adjacent courses
    • 5t
    • 650: 5.1.5.2.b
  83. Bottoms – Minimum size of bottom welds
    • Full Fillet
    • 650: 5.1.5.4.3
  84. Repad - Nozzle size that never requires a repad
    • < 2 NPS
    • 650: 5.7.2.1
  85. Repairs – On existing tank, new nozzle must use insert plate if shell is over ½” thick and shell material does not meet current MDMT requirements
    • > 2 NPS
    • 653: 9.8.6
  86. RT - Maximum pipe size when using a RT elliptical shot (double-wall technique, double-wall view)
    • 3 NPS (3-1/2” O.D.)
    • V: T-271.2.b
  87. Hot Tap - Maximum nozzle size that can be hot tapped when course thickness is > ½” and shell has unknown toughness
    • 4 NPS
    • 653: 9.14.1.1.b.1
  88. Definition - When adding a new nozzle, nozzle size to be considered a major alteration
    • > 12 NPS
    • 653: 3.19.a
  89. RT Film Density - Limits of weld as compared to the IQI (range)
    • -15 to +30%
    • V: T-282.2.a
  90. AI – Amount of time inspector must be involved in inspection activities  - required to maintain API 653 certification
    • 20%
    • 653: D.5.2.a
  91. RT Reconstruction - % to of weld intersections (new welds to old welds) to be RT’d
    • 25%
    • 653: 12.2.1.5
  92. Maximum relative humidity when performing abrasive blasting for tank bottom linings
    • 80%
    • 652: 7.4
  93. Maximum relative humidity when installing tank bottom linings
    • 80%
    • 652: 8.3
  94. % to RT of butt-welded annular plate joints on a reconstructed tank
    • 100%
    • 653: 12.2.1.4
  95. % to RT when installing a new insert plate with a nozzle into an existing shell plate
    • 100%
    • 653: 12.2.1.8
  96. Reconstruction - Base metal temp where welding is not allowed
    • < 0 oF
    • 653: 10.4.2.3
  97. Reconstruction - Base metal temp when hand-warm pre-heat is required
    • 0 - 32 oF
    • 653: 10.4.2.3
  98. Linings - Minimum temp when performing abrasive blasting
    • 5 oF above dew point
    • 652: 7.4
  99. Linings - Minimum temp when installing tank bottom linings
    • 5 oF above dew point
    • 652: 8.3
  100. Corrosion – The corrosion rate of steel tank bottoms may double with this rise in temperature
    • 18 oF
    • 651: 5.4.1 Note
  101. UT Calibration - Calibration Block must be within what temperature of the part to be examined
    • 25 oF
    • 577: 9.9.1
  102. Vacuum Box - Standard temperature range for VB exam
    • 40 - 125 oF
    • 650: 8.6.6
  103. PT - Standard temperature range for a PT exam
    • 40 - 125 oF
    • V: T-652/653
  104. Impact Test - Design metal temperature that requires weld procedure used for vertical welds to be impacted tested
    • < 50 oF
    • 650: 9.2.2.3
  105. Brittle - Tank metal temperature where brittle fracture is NOT a concern
    • > 60 oF
    • 653: Fig 5.1
  106. Bottom Lap Patches - Metal temp where lap-patches are NOT allowed in critical zone on SS tank
    • > 100 oF
    • 653: 9.10.1.2.3
  107. Intervals - If tank product solidify below this temperature, the code maximum interval rules do not apply
    • < 110 oF
    • 653: 6.4.2.1.2.1
  108. Preheat - Approximate temp of a required hand-warm pre-heat
    • 140 oF
    • 653: 10.4.2.3
  109. Corrosion - Temperature when high strength caustic causes serious corrosion in CS and 300 SS
    • > 150 oF
    • 571: 4.3.10.6c
    • 575: 7.4.3
  110. Preheat - Required pre-heat temperature for shell welds over 1.5” thick during Reconstruction
    • 200 oF
    • 653: 10.4.4.3
  111. Bottom Lap Patches - Metal temperature where lap-patches are NOT allowed in the critical zone on CS tanks
    • > 200 oF
    • 653: 9.10.1.2.3
  112. Temperature Range for API 650 App M
    • 200-500 oF
    • 650: 1.1.20
  113. Corrosion - Most aggressive temperature range for CUI.  Range for API 575 and API 571
    • API 575; 120 – 200 oF
    • API 571; 212 - 250 oF
    • 575: 7.2.7 
    • 571: 4.3.3.3.d
  114. Preheat - Minimum pre-heat temperature, when pre-heat is substituted for PWHT
    • 300 oF
    • 653: 11.3.1.d
  115. Maximum temperature for UT readings
    • 1000 oF
    • V: SE-797 8.5
  116. PWHT Temperature
    • 1100-1200 oF
    • 650: 5.7.4.1/2
  117. Linings - Thickness of a thin film lining
    • < 0.020”
    • 652: 3.33
  118. Bottom - Minimum allowed bottom plate thickness when there is a Reinforced Liner that is > 0.050” thick
    • 0.050”
    • 653: Table 4.4
  119. Bottom - Minimum allowed bottom plate thickness when there is a means to Detect and Contain a leak
    • 0.050”
    • 653: Table 4.4
  120. Roofs - Minimum allowed average thickness of corroded roof plate
    • 0.090” in 100 in2
    • 653: 4.2.1.2
  121. Shell - Minimum arbitrary shell thickness (used when calculated minimum thickness is below this number)
    • 0.100”
    • 653: 4.3.3.1.b (definitions)
  122. Bottom - Minimum allowed thickness of bottom plate at toe of the external shell-to-bottom fillet weld
    • 0.100”
    • 653: 4.4.5.7
  123. Bottom - Minimum allowed bottom plate thickness away from critical zone or an annular plate
    • 0.100”
    • 653: Table 4.4
  124. Bottom - Minimum allowed plate thickness in critical zone that can be repaired by weld-buildup
    • 0.100”
    • 653: 9.10.1.6.b
  125. Roof Rim - Minimum allowed roof rim thickness
    • 0.100”
    • 653: 9.13.6.2
  126. Roof - Minimum thickness of new roof plate (cone & floating)
    • 3/16”
    • 650: 5.10.2.2 &  C.3.3.2      
    • 653: 9.11.2.1 & 9.11.3.1
  127. Roof Rim - Minimum thickness of new roof rim
    • 3/16”
    • 653: 9.13.6.2
  128. Bottom - Normal minimum thickness of new bottom plate
    • 1/4” ( 0.236”)
    • 650: 5.4.1
  129. Bottom Patch - Maximum thickness of lap-patch in critical zone
    • 1/4”
    • 653: 9.10.1.2.a
  130. Brittle - Thickness when brittle fracture is NOT a concern
    • 1/2”
    • 653: Fig. 5.1
  131. Shell Patch – Max shell thickness when lap-patches are allowed
    • 1/2”
    • 653: 9.3.1.2
  132. Shell Patch – Maximum patch thickness for a shell lap-patch
    • 1/2”
    • 653: 9.3.1.3
  133. Weld Qualification – When can UT be used in lieu of RT to Qualify a Welder/Welding Operator
    • >1/2”
    • IX: QW-191. 2.1.a
  134. NDE - When welding existing shell plate.  Thickness that requires 100% examination by RT and MT or PT.
    • > 1”
    • 653: 12.1.5.1.
  135. NDE - Plate thickness which requires 100% of verticals weld to be radiographed
    • > 1”
    • 650: 8.1.2.2.c
  136. Reconstruction - Shell plate thickness that requires all welds to be preheated to at least 200 oF.
    • > 1-1/2”
    • 653: 10.4.4.3
  137. Shell Pits - Minimum remaining thickness allowed below a pit
    • ½ tmin
    • 653: 4.3.2.2.a
  138. Vacuum Box - Minimum duration of each vacuum-testing exam
    • 5 seconds
    • 650: 8.6.8
  139. NDE - Minimum time an examiner should be in a darkened area prior to using a black light for MT & PT exams
    • 5 minutes
    • V: T-676.4.b  & T-777.2.b
  140. NDE - Final interpretation of a PT exam after application of developer (time range)
    • 10-60 minutes
    • V: T-676.1
  141. Testing - Minimum time to let oil to penetrate when performing a diesel oil test of shell-to-bottom weld
    • 4 hour
    • 650: 7.2.4.1.d
    • 653: 12.1.6.1
  142. Testing - Minimum duration for a tank hydrotest to be held at full height
    • 24 hour
    • 653: 12.3.1
  143. NDE - Max Calibrating Interval - Permanent magnet MT Yoke
    • 1 day
    • V: T-762(a)
  144. Intervals - Maximum Interval - Routine In-Service inspection
    • 1 month
    • 653: 6.3.1.2
  145. CP - Maximum Interval - Routine check of CP impressed current sources
    • 2 months
    • 651: 11.3.2.2
  146. NDE - Max Calibrating Interval - RT densitometer
    • 90 days
    • V: T-262.1
  147. Reconstruction - Maximum allowed age of last thickness readings, used to design a reconstructed tank
    • 180 days
    • 653: 8.4.1
  148. Weld Qualification – Maximum Time - Welder or operator maintains qualifications for a welding process without using that process
    • 6 months
    • IX: QW-322. 1.a
  149. NDE - Max Calibrating Interval - Electromagnetic MT Yoke
    • 1 year
    • V: T-762(a)
  150. CP - Maximum Interval - Detailed check of CP impressed current facilities
    • 1 year
    • 651: 11.3.2.3
  151. CP - Maximum Interval - CP surveys (field potential measurements)
    • 1 year
    • 651: 11.3.1.2
  152. NDE - Minimum Time - To keep RT’s acquired during tank repairs and reconstructions
    • 1 year
    • 653: 13.2.3.d
  153. Vac Box – Max Test Interval - Jaeger 2 eye test for VB operator
    • 1 year
    • 650: 8.6.4.a
  154. NDE – Max Test Interval - Jaeger 2 eye test for PT/ MT tech
    • 1 year
    • 650: 8.2.3/8.4.3
  155. AI – Time period between API AI recertification
    • 3 year
    • 653: D.5.1
  156. Intervals - Maximum Interval - UT readings of a tank shell when the corrosion rate is unknown
    • 5 year
    • 653: 6.3.3.2.a
  157. Intervals - Maximum Interval - External Inspection
    • Lesser 5 yr or ¼ life
    • 653: 6.3.2.1
  158. AI – Time period between API AI on-line recertification
    • 6 year
    • 653: D.5.3
  159. Intervals - Maximum Interval - Initial Internal Inspection (without RBI or other special situations)
    • 10 years
    • 653: 6.4.2.1
  160. RBI - Maximum Interval - RBI reassessments
    • 10 years
    • 653: 6.4.2.2.2
  161. Intervals - Maximum Interval - UT readings of a tank shell when the corrosion rate is known
    • Lesser 15 yr or ½ life
    • 653: 6.3.3.2.b
  162. Intervals - Maximum Interval - Internal Inspection when the corrosion rate is known (without RBI assessment)
    • 20 yr or full bttm life
    • 653: 6.4.2.2.1
  163. Linings - Typical life of a properly applied tank lining
    • > 20 years
    • 652: 6.2.1.c  & 6.3.1.f
  164. NDE - Max Calibrating Interval - Check the light intensity of a black light used in a MT or PT exam
    • Before & after use
    • V: T-676.4(e) & T-777.2(e)
  165. Scope - Maximum internal pressure for tanks in API 650 & 653
    • 2.5 psig
    • 650: F.1.3
    • 575: 3.3
  166. Vacuum Box - Normal vacuum required when vacuum testing
    • 3 - 5 psig
    • 650: 8.6.3
  167. Pressure Test - Pressure used when air testing the shell-to-bottom weld
    • 15 psig
    • 650: 7.2.4.2  
    • 653: 12.1.6.2
  168. Pressure Test - Pressure used when air testing a repad
    • 15 psig
    • 650: 7.3.4
  169. Scope - Maximum internal pressure for tanks in API 620
    • 15 psig
    • 575: 4.3.2
  170. Minimum slope of normal tank bottom
    • 1:120
    • 650: 5.4.4
  171. Minimum slope of cone roof tank (for water runoff)
    • 1:16
    • 650: 5.10.4.1
  172. Maximum roof slope on tanks > 50’ diameter (if roof is considered to be fragible)
    • 2:12
    • 650: 5.10.2.6.a.1
  173. Maximum taper (steepest slope) allowed for an insert plate
    • 1:4
    • 650: 5.7.1.7
    • 653: 9.8.4.a
  174. Roofs - Maximum amount of primary seal that can be removed for repair while tank is still in service
    • 1/4
    • 653: 9.13.1
  175. NDE - Minimum number of RT’s required on a circular shell replacement plate
    • 1
    • 653: 12.2.1.6.1
  176. FFS – Current joint efficiency “E” in API 650
    • 1.0
    • 653: Table 4.2
  177. FFS – Joint Efficiency “E” – Calculating tmin for an LTA,  when LTA is away from rivets by > 6”
    • 1.0
    • 653: 4.3.4.1
  178. FFS – Joint Efficiency “E” – Calculating tmin for an LTA,  when LTA is away from weld by greater of: 1” or 2t
    • 1.0
    • 653: 4.3.3.1  “E” defined
  179. Reconstruction - Number of sets of center punch marks located on top and bottom edges of each shell piece
    • 2
    • 653: 10.3.5.2
  180. Weld Qualification - Number of tension tests to qualify a WPS
    • 2
    • IX: QW451.1
  181. Weld Qualification - Number of bend tests to qualify a welder or welding operator in welding positions 1G-4G
    • 2
    • IX: QW452.1.a
  182. NDE - Minimum # of exposures to RT 60o of a weld using a double-wall technique, double-wall view (elliptical shot)
    • 2
    • V: T-271.2.b.1
  183. NDE - RT film Density Range - allowed for the weld & IQI when using a gamma ray source
    • 2.0 – 4.0
    • V: T-282.1
  184. NDE - Minimum # of exposures to RT 360o of a weld using a double-wall technique, single-wall view
    • 3
    • V: T-271.2.a
  185. Impact Test - Number of test bars required in each set of impact test specimens
    • 3
    • 650: 4.2.9.3
  186. 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
    • 3
    • V: T-277.3
  187. Hot Tap - Minimum number of UT readings around the circumference of a new hot tapped nozzle
    • 4
    • 653: 9.14.3.2
  188. Weld Qualification - Number of bend tests to qualify a WPS
    • 4
    • IX: QW451.1
  189. Weld Qualification - Number of bend tests required to qualify a welder in welding positions 5G & 6G
    • 4
    • IX: QW452.1.a  Note 1
  190. FFS - Corrosion Averaging in a Shell LTA - Minimum # of UT readings to take on each designated vertical line.
    • 5
    • 653: 4.3.2.1.c
  191. NDE - Minimum number of RT’s required on a square or rectangular shell replacement plate
    • 6
    • 653: 12.2.1.6.2
  192. Settlement - Minimum number of settlement points around circumference
    • 8
    • 653: 12.5.1.2 & Fig B.1
  193. Reconstructed – Maximum allowed out-of-plumbness
    • 1/100 height
    • 653: 10.5.2.1
  194. Corrosion – pH level that causes corrosion to increase
    • < 5.0 pH
    • 651: 5.3.2.1.g
  195. Corrosion – Chloride level where pitting on steel begins
    • 10 ppm
    • 651: 5.3.2.1.h
  196. NDE - Weight used to check magnetic strength of an AC yoke
    • 10 lb.
    • V: T-762.b
  197. Grounding - Maximum electrical resistance permitted from tank to earth
    • 25 ohm
    • 575: 7.2.5
  198. NDE – Min angle of eye-to-part to count as a Visual Exam
    • 30 degrees
    • 575: 8.2.1
    • 577: 9.3.1
  199. NDE - Weight used to check magnetic strength of a DC yoke
    • 40 lb.
    • V: T-762.c
  200. NDE - Minimum light intensity when performing non-fluorescent MT or PT exams
    • 100 ft-candles
    • V: T-676.3 & T-777.1
  201. Vacuum Box - Minimum light intensity when performing vacuum testing
    • 100 ft-candles
    • 650: 8.6.7
  202. NDE - Minimum black light intensity when performing fluorescent MT or PT exams
    • 1000 micro-W/cm2
    • V: T-676.4.c & T-777.2.c
  203. Brittle – Shell stress when brittle fracture is NOT a concern
    • < 7000 psi
    • 653: Fig 5.1
  204. NDE - Hole size that must be visible in RT when using a hole-type IQI
    • 2T
    • V: T-283.1
  205. Weld Qualification - Maximum allowed thickness on a WPS based on the plate thickness (T) of a PQR test coupon
    • 2T
    • IX: QW451.1
  206. Weld Qualification – The “all-position” test coupon
    • 6G
    • IX: QW461.9
  207. NDE - Lead letter used during RT to check for backscatter radiation
    • B
    • V: T-223
  208. NDE - Lead letter used during RT to indicate a film-side IQI
    • F
    • V: T-277.1.b
  209. NDE - Lead letter used during RT to indicate a repaired weld
    • R
    • 653: 12.2.3.2
  210. Repairs – Material where pre-heat can be substituted for a required PWHT
    • P-1
    • 653: 11.3.1.a
  211. Repairs – Materials where control deposition welding can be substituted for a required PWHT
    • P1, P3, P4
    • 653: 11.3.2.a
  212. Hot Taps – Nozzle thickness for hot tapped nozzles
    • Ext Strong
    • 653: Fig 9.10
  213. Repairs – Welding processes that can be used when substituting Preheat or Controlled Deposition welding for a required PWHT
    • SMAW, GMAW, FCAW, GTAW
    • 653: 11.3.1.b
    • 653: 11.3.2.b
  214. Corrosion – In a corrosion cell, the part that corrodes
    • Anode
    • 651: 4.1.1.a
  215. Corrosion – In a corrosion cell, the part that doesn’t corrode
    • Cathode
    • 651: 4.1.1.b
  216. Linings – Minimum surface prep prior to applying lining
    • NACE 2  Near-white
    • 652: 7.1
  217. Weld Qualification – Rejectable in RT when qualifying a welder
    Crack, LoF, IP

    IX: QW191.2.3.a
Author
SamG
ID
263278
Card Set
API 653 Exam Prep
Description
API 653 Exam Prep
Updated

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