Understanding APIICP653 Reading 2-650-Selected Reading
Understanding APIICP653 Reading 2-650-Selected Reading
Understanding APIICP653 Reading 2-650-Selected Reading
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500 mm (20 in.) and 600 mm (24 in.) shell manholes: twenty-eight 20 mm-diameter ( 3 /4 in.) bolts in 23 mm ( 7 /8 in.) holes<br />
750 mm (30 in.) and 900 mm (36 in.) shell manholes: forty-two 20 mm-diameter ( 3 /4 in.) bolts in 23 mm ( 7 /8 in.) holes<br />
(Bolt holes shall straddle the flange vertical centerline.)<br />
(See Figure 5-7b)<br />
Gasket (see Note 1):<br />
500 mm (20 in.) manhole: 645 mm (25 3 /8 in.) OD 508 mm (20 in.) ID 3 mm ( 1 /8 in.) thickness<br />
600 mm (24 in.) manhole: 746 mm (29 3 /8 in.) OD 610 mm (24 in.) ID 3 mm ( 1 /8 in.) thickness<br />
750 mm (30 in.) manhole: 899 mm (35 3 /8 in.) OD 762 mm (30 in.) ID 3 mm ( 1 /8 in.) thickness<br />
900 mm (36 in.) manhole: 1051 mm (41 3 /8 in.) OD 914 mm (36 in.) ID 3 mm ( 1 /8 in.) thickness<br />
One 6 mm ( 1 /4 in.) telltale<br />
hole in reinforcing plate,<br />
on horizontal<br />
centerline<br />
1<br />
t f<br />
Reinforcing pad<br />
shall be shaped<br />
to suit tank<br />
curvature<br />
Alternative<br />
circular shape<br />
(see Note 8)<br />
C L<br />
L<br />
(see<br />
Note 8)<br />
1<br />
D R<br />
/2<br />
(see<br />
Note 8)<br />
L<br />
D O /2<br />
(see<br />
Note 8)<br />
230 mm<br />
(9 in.)<br />
C L<br />
Symmetrical about<br />
D b<br />
D c<br />
10 mm-diameter<br />
( 3 /8 in.) rod<br />
6 mm ( 1 /4 in.)<br />
t c<br />
75 mm<br />
(3")<br />
125 mm (5") minimum<br />
32 mm (1 1 /4 in.)<br />
Rounded corners<br />
(150 mm [6 in.] minimum radius)<br />
150 mm<br />
(6 in.)<br />
T<br />
t n<br />
See<br />
details<br />
OD<br />
t<br />
D R<br />
D P<br />
C L<br />
See<br />
Figure<br />
5-7b<br />
Arc dimension = W/2<br />
Uniform, smooth surface<br />
Rounded<br />
corner<br />
Manhole OD<br />
500 mm (20 in.) and 600 mm (24 in.) manhole: 750 mm (30 in.)<br />
750 mm (30 in.) manhole: 900 mm (36 in.)<br />
900 mm (36 in.) manhole: 1050 mm (42 in.)<br />
(Increase as necessary for weld clearance)<br />
Rounded<br />
corners<br />
Manhole OD<br />
(See<br />
Note 7)<br />
6 mm<br />
( 1 /4 in.)<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 (see Note 3)<br />
Detail a<br />
NOTES<br />
1. Gasket material shall be specified by the Purchaser. See 5.7.5.4.<br />
2. The gasketed face shall be machine-finished to provide a minimum<br />
gasket-bearing width of 19 mm ( 3 /4 in.).<br />
3. See Table 5.3a and Table 5.3b.<br />
4. See Table 5.4a and Table 5.4b.<br />
5. The size of the weld shall equal the thickness of the thinner member<br />
joined.<br />
6. The shell nozzles shown in Figure 5.8 may be substituted for<br />
manholes.<br />
See Note 2<br />
Figure 5.7a—Shell Manhole<br />
t f (see Note 3)<br />
Detail b<br />
•<br />
7. The minimum centerline elevations allowed by Table 5.6a, Table<br />
5.6b, and Figure 5.6 may be used when approved by the Purchaser.<br />
8. For dimensions for OD, D R , D o , L, and W, see Table 5.6a and Table<br />
5.6b, Columns 2, 4, 5, and 6. For Dimension D P see Table 5.7a and<br />
Table 5.7b, Column 3.<br />
9. At the option of the Manufacturer, the manhole ID may be set to<br />
the OD dimension listed in Table 5.6a and Table 5.6b, Column 2.<br />
Reinforcement area and weld spacing must meet 5.7.2 and 5.7.3<br />
requirements respectively.
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