- Table 27 to Subpart G of Part 63—Summary of Internal Floating Deck Fitting Loss Factors (KF) and Typical Number of Fittings (NF)
| Deck fitting type | Deck fitting loss factor (K | Typical number of fittings (N | Access hatch | 1. | Bolted cover, gasketed | 1.6 | Unbolted cover, gasketed | 11 | Unbolted cover, ungasketed | b 25 | Automatic gauge float well | 1. | Bolted cover, gasketed | 5.1 | Unbolted cover, gasketed | 15 | Unbolted cover, ungasketed | b 28 | Column well | (see Table 24). | Builtup column-sliding cover, gasketed | 33 | Builtup column-sliding cover, ungasketed | b 47
10 | Pipe column-flexible fabric sleeve seal | 19 | Pipe column-sliding cover, gasketed | 32 | Pipe column-sliding cover, ungasketed | Ladder well | 1. | Sliding cover, gasketed | 56 | Sliding cover, ungasketed | b 76 | Roof leg or hanger well | (5 + D/10 + D 2/600) c. | Adjustable | b 7.9 | Fixed | 0 | Sample pipe or well | 1. | Slotted pipe-sliding cover, gasketed | 44 | Slotted pipe-sliding cover, ungasketed | 57 | Sample well-slit fabric seal, 10 percent open area | b 12 | Stub drain, 1-in diameter d | 1.2 | (D 2/125) c. | Vacuum breaker | 1. | Weighted mechanical actuation, gasketed | b 0.7 | Weighted mechanical actuation, ungasketed | 0.9 |
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a Units for K
b If no specific information is available, this value can be assumed to represent the most common/typical deck fittings currently used.
c D = Tank diameter (feet).
d Not used on welded contact internal floating decks.