Table 27 - Summary of Internal Floating Deck Fitting Loss Factors (KF) and Typical Number of Fittings (NF)

Latest version.

Deck fitting typeDeck fitting loss factor (KF)aTypical number of fittings (NF)Access hatch1.Bolted cover, gasketed1.6Unbolted cover, gasketed11Unbolted cover, ungasketedb 25Automatic gauge float well1.Bolted cover, gasketed5.1Unbolted cover, gasketed15Unbolted cover, ungasketedb 28Column well(see Table 24).Builtup column-sliding cover, gasketed33Builtup column-sliding cover, ungasketedb 47
10

Pipe column-flexible fabric sleeve seal19

Pipe column-sliding cover, gasketed32

Pipe column-sliding cover, ungasketed

Ladder well1.

Sliding cover, gasketed56

Sliding cover, ungasketedb 76

Roof leg or hanger well(5+D/10+D 2/600) c.

Adjustableb 7.9

Fixed0

Sample pipe or well1.

Slotted pipe-sliding cover, gasketed44

Slotted pipe-sliding cover, ungasketed57

Sample well-slit fabric seal, 10 percent open areab 12

Stub drain, 1-in diameter d1.2(D 2/125) c.

Vacuum breaker1.

Weighted mechanical actuation, gasketedb 0.7

Weighted mechanical actuation, ungasketed0.9

a Units for KF are pound-moles per year.

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.

                    
                        var val = document.getElementById('citecontent').innerHTML;
                        art.dialog.defaults.title = window.location.href;
                        art.dialog.data('cite', val);
                        art.dialog.data('homeDemoPath', '/Scripts/plus/artDialog/');
                        art.dialog.open('/Scripts/plus/artDialog/citeiframe.html');