API 653 Data Sheets-Dimensions Group 2

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:  8.1.2.8653:  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-302.2IX:  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-patch653:  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 box650:  8.6.1

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