Welded Steel Tanks for Oil Storage
Welded Steel Tanks for Oil Storage
Welded Steel Tanks for Oil Storage
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3-14 API STANDARD 650<br />
One 6 mm ( 1 /4") telltale<br />
hole in rein<strong>for</strong>cing plate,<br />
on horizontal<br />
centerline<br />
Alternative<br />
circular shape<br />
(see Note 8)<br />
C L<br />
L<br />
(see<br />
Note 8)<br />
500 mm (20") and 600 mm (24") shell manholes: twenty-eight 20 mm-diameter ( 3 /4") bolts in 24 mm ( 7 /8") holes<br />
750 mm (30") and 900 mm (36") shell manholes: <strong>for</strong>ty-two 20 mm-diameter ( 3 /4") bolts in 24 mm ( 7 /8") holes<br />
(Bolt holes shall straddle the flange vertical centerline.)<br />
(See Figure 3-4B)<br />
1<br />
1<br />
D R /2<br />
(see<br />
Note 8)<br />
L<br />
D O<br />
/2<br />
(see<br />
Note 8)<br />
Gasket (see Note 1):<br />
500 mm (20") manhole: 635 mm (25 3 /8") OD × 500 mm (20") ID × 3 mm ( 1 /8") thickness<br />
600 mm (24") manhole: 735 mm (29 3 /8") OD × 600 mm (24") ID × 3 mm ( 1 /8") thickness<br />
750 mm (30") manhole: 885 mm (35 3 /8") OD × 750 mm (30") ID × 3 mm ( 1 /8") thickness<br />
900 mm (36") manhole: 1035 mm (41 3 /8") OD × 900 mm (36") ID × 3 mm ( 1 /8") thickness<br />
230 mm<br />
(9")<br />
C L<br />
Symmetrical about<br />
D b<br />
10 mm-diameter<br />
( 3 /8") rod<br />
D c<br />
6 mm ( 1 /4")<br />
32 mm (1 1 /4")<br />
Rounded corners<br />
(150 mm [6"] minimum radius)<br />
t c<br />
75 mm<br />
(3")<br />
125 mm (5") minimum<br />
;<br />
;<br />
;;;;<br />
; t n<br />
;<br />
;<br />
150 mm<br />
;<br />
(6")<br />
;<br />
;<br />
See<br />
; details<br />
;<br />
;;;;<br />
;<br />
;;;<br />
; T<br />
Rein<strong>for</strong>cing pad<br />
shall be shaped<br />
to suit tank<br />
curvature<br />
;;;;;;;<br />
Arc dimension = W/2 500 mm (20") and 600 mm (24") manhole: 750 mm (30")<br />
750 mm (30") manhole: 900 mm (36")<br />
900 mm (36") manhole: 1050 mm (42")<br />
(Increase as necessary <strong>for</strong> clearance)<br />
Uni<strong>for</strong>m, smooth surface<br />
Rounded<br />
Manhole ID<br />
corner<br />
Rounded<br />
corners<br />
Manhole ID<br />
t f<br />
;;;<br />
;;;<br />
;;;<br />
;;;<br />
;;;;;;;;<br />
;;;;;;;;<br />
ID<br />
t<br />
D p<br />
C L<br />
See<br />
Figure<br />
3-4B<br />
(See<br />
Note 7)<br />
6 mm<br />
( 1 /4")<br />
t n<br />
(see<br />
Note 4)<br />
t n (see<br />
Note 4)<br />
See<br />
Note 5<br />
See Note 2<br />
t f<br />
(see Note 3)<br />
See Note 2<br />
t f<br />
(see Note 3)<br />
Detail a<br />
Detail b<br />
Notes:<br />
01 ● 1. Gasket material shall be specified by the purchaser. See 3.7.5.4.<br />
2. The gasketed face shall be machine finished to provide a minimum<br />
gasket-bearing width of 20 mm ( 3 /4 in.).<br />
3. See Table 3-3.<br />
4. See Table 3-4.<br />
5. The size of the weld shall equal the thickness of the thinner<br />
member joined.<br />
6. The shell nozzles shown in Table 3-6 may be substituted <strong>for</strong> manholes.<br />
7. When the shell nozzles shown in Figure 3-5 are used, the minimum<br />
centerline heights above the tank bottom given in Table 3-6<br />
are acceptable.<br />
8. For dimensions <strong>for</strong> D o , D R , L, and W, see Table 3-6, Columns 4,<br />
5, and 6.<br />
Figure 3-4A—Shell Manhole
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