API 653 Data Sheets-Dimensions

  1. Linings- Typically anchor profile of steel surface required for the installation of a tank bottom lining   652:  7.5
    1.5-4.0 mils
  2. Welds- Maximum undercut of a vertical weld & nozzle weld   650:  8.5.2.b
    1/64"
  3. Welds- Maximum undercut of a horizontal weld
    • 650:  8.5.2.b
    • 1/32"
  4. Welds- Maximum diameter of a surface porosity cluster   650:  8.5.2.c
    3/32"
  5. Weld Qualification- Max allowed discontinuity in a bend test  IX:  QW-163
    1/8"
  6. Nameplates- Minimum size of name plate letters   650:  10.1.1 &  653:  13.1.1.1
    5/32"
  7. Bottoms- Minimum external projection of bottom plate on an existing tank (from toe of shell-to-bottom FW)  653:  4.4.5.7
    3/8"
  8. Reconstruction- Max amount of peaking allowed in vertical welds  653:  10.5.4
    1/2"
  9. 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)
    > 1" or 2t
  10. 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
    1"
  11. NDE- When performing a PT examination, minimum distance to clean beyond the area to be examined     V: T-642.b
    1"
  12. NDE- When performing a MT examination, minimum distance to clean beyond the area to be examined   V:  T-741.1.b
    1"
  13. Reconstruction- Maximum amount of banding allowed in a horizontal weld   653:  10.5.5
    1"
  14. Bottoms- Minimum overlap required for single-welded lap joints   650:  5.1.3.5
    1"
  15. Bottoms- Minimum external projection of bottom plate on a new tank   650:  5.4.2
    2"
  16. Vacuum Box- Minimum overlap of previously test surfaces when using a vacuum box
    • 650:  8.6.5
    • 2"
  17. Bottom Patch- Minimum overlap of bottom lap-patch fillet weld to the nearest existing bottom weld   653:  Fig. 9.13
    2"
  18. Bottom Patch- Minimum distance bottom lap-patch fillet weld to the nearest existing bottom weld   653:  Fig. 9.13
    2"
  19. Shell Patch- Minimum radius of a shell lap-patch   653:  9.3.1.4
    2"
  20. Reconstruction- If reusing bottom plates, minimum distance to cut from existing bottom welds (if plates are not deseamed)
    • 653:  10.3.2.1
    • 2"
  21. Reconstruction- If reusing roof plates, minimum distance to cut from existing roof welds (if plates are not deseamed)
    • 653:  10.3.4.1
    • 2"
  22. Shell Pitting- Maximum allowed vertical length of pits on a tank shell   653:  4.3.2.2.b
    2" in 8" line
  23. Bottom Pitting- Maximum allowed length of pits in the critical zone that can be repaired by weld-buildup   653:  9.10.1.6.a
    2" in 8" arc
  24. Bottoms- Radial length of critical zone measured from shell   653:  3.10
    3"
  25. Bottoms- Suggested sand pad thickness
    • 650:  B.3.2
    • 3-4"
  26. Welds- Minimum distance between clusters of surface porosity  650:  8.5.2.c
    4"
  27. Shell Patch- Minimum dimension of a shell lap-patch    653:  9.3.1.7
    4"
  28. Shell Patch- Minimum radius of a shell flush-patch   653:  Fig. 9.1 "R" dimension
    6"
  29. 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
    6"
  30. Bottom Patch- Minimum size of bottom lap-patch that does NOT cross a bottom seam
    • 653:  9.10.1.1.b
    • 6"
  31. 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
    • 6"
  32. Reconstruction- If reusing shell plates, minimum distance to cut from existing shell welds (if plates are not deseamed)
    • 653:  10.3.3.1.c
    • 6"
  33. RT- Minimum diagnostic length of a RT for vertical or horizontal welds  
    • 650:  8.1.2.8
    • 653:  12.2.1.7
    • 6"
  34. 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
    • 6"
  35. Weld Qualify-Minimum weld length when qualifying a welding operator with RT/UT of a test coupon  IX:  QW-302.2
    6"
  36. Shell Patch- Minimum distance to overlap a shell weld when using a lap-patch
    • 653:  9.3.1.5
    • 6"
  37. Corrosion- Area to dig when checking for soil-to-air corrosion   575:  8.2.10
    6-12"
  38. NDE- Distance of eye-to-part to count as visual exam   577:  9.3.1.e
    6"-24"
  39. Vacuum Box- Typical size of a vacuum box
    • 650:  8.6.1
    • 6" x 30"
  40. Shell Patch- Minimum dimension of a shell flush-patch    653:  9.2.2.1
    12"
  41. 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
    12"
  42. Bottom Patch- Minimum dimension of bottom lap-patch that crosses a bottom seam
    • 653:  9.10.1.1.a
    • 12"
  43. Foundations- Suggested height above grade for new tank bottoms  650:  B.3.1
    12"
  44. 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
    • 12"
  45. Shell Patch- Dimension of a shell flush-patch that is considered either a major repair or alteration  653:  3.20.c
    > 12"
  46. Definition- Dimension of a shell vertical weld if repaired or replaced is considered a major repair of major alteration  653:  3.20.e
    > 12"
  47. Bottom Patch- Maximum width of bottom patch in the critical zone
    •  653:  Fig. 9.13 note 3
    • 24"
  48. Bottoms- Minimum radial width of annular plate (distance between shell and nearest bottom fillet weld)  650:  5.1.5.4.3 & 5.5.2
    24"
  49. NDE- Maximum distance of eye-to-part to count as visual exam  575:  9.2.1
    24"
  50. Hot Tap- Minimum height of liquid above new nozzle during the hot tap operation
    • 653:  9.14.1.2
    • 36"
  51. Weld Qualify- minimum weld length when qualifying a welding operator with RT/UT of first production weld  IX:  QW-305.1
    36"
  52. NDE- Length of sweep board used when checking for banding or peaking
    •  653:  10.5.4/5
    • 36"
  53. Welds- Maximum distance between welder ID stamps on a tank weld
    •  650:  9.4  
    • 653:  11.2.2
    • 36"
  54. Shell Patch- Maximum size of shell lap-patch (vertical & horizontal dimensions)
    • 653:  9.3.1.7
    • 48" x 72"
  55. Settlement- Maximum distance between tank settlement survey points across the inside of the tank  653:  Fig. B.2
    10'
  56. Roofs- Maximum shunt spacing on floating roof
    • 650:  C.3.1.6
    • 10'
  57. CP- Typical tank size for Galvanic CP systems
    • 651:  6.2.1
    • < 20'
  58. Settlement- Maximum distance between tank settlement survey points around the outside diameter of the tank  653:  Fig. B.1/12.5.2
    32'
  59. NDE- Maximum distance between RT's in horizontal welds when welding to existing shell plates  653:  12.2.1.2.b & c
    50'
  60. Shell Calcs- Tank diameter when Variable Point Design method should always be used to calc shell minimum thickness  653:  4.3.3.4
    > 200'
  61. Shell- Minimum offset between vertical welds in adjacent courses  650:  5.1.5.2.b
    5t
  62. Bottoms- Minimum size of bottom welds
    • 650:  5.1.5.4.3
    • Full Fillet
Author
egf4201
ID
327313
Card Set
API 653 Data Sheets-Dimensions
Description
API 653 Data Sheets-Dimensions
Updated