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20 Cards in this Set
- Front
- Back
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Shell Patch - Minimum overlap of shell lap-patch used to cover a hole (edge of hole to edge of patch) |
1" |
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Bottom Patch - Minimum overlap of bottom lap-patch used to cover corroded area (edge of corrosion to edge of patch) |
2" |
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Bottom Patch - Minimum distance bottom lap-patch fillet weld to the nearest existing bottom weld |
2" |
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Shell Patch - Minimum radius of a shell lap-patch |
2" |
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Shell Patch - Minimum dimension of a shell lap-patch |
4" |
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Shell Patch - Minimum radius of a shell flush-patch |
6" |
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Bottom Patch - Minimum size of bottom lap-patch that does NOT cross a bottom seam |
6" |
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Bottom Patch - Minimum distance between a bottom lap-patch and the shell for patches that do NOT extend to the shell. |
6" |
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Shell Patch - Minimum distance to overlap a shell weld when using a lap-patch |
6" |
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Bottoms - Minimum dimension that a 3-lap joint can be from other 3-laps, the shell, or annular pate joints. |
12" |
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Bottom Patch - Minimum dimension of bottom lap-patch that crossed a bottom seam |
12" |
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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" |
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Shell Patch - Dimension of a shell flush-patch that is considered either a major repair or alteration. |
>12" |
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Bottom Patch - Max width of bottom patch in the critical zone |
24" |
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Shell patch - Maximum size of shell lap-patch (vertical and horizontal dimensions) |
48" X 72" |
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Bottom Lap Patches - Metal temp where lap-patches are NOT allowed in critical zone on SS tank |
>100°F |
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Bottom Lap Patches - Metal temperature where lap-patches are NOT allowed in the critical zone on CS tanks |
>200°F |
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Bottom Patch - Maximum thickness of lap-patch in critical zone |
1/4" |
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Shell Patch - Max shell thickness when lap-patches are allowed |
1/2" |
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Shell Patch - Maximum patch thickness for a shell lap-patch |
1/2" |
