Understanding APIICP653 Reading 2-650-Selected Reading

Grind flush
Typical
45º
75 mm (3 in.) typical
Section A-A, Typical
A
A
125 mm (5 in.)
typical
Typical
Neck 6 mm ( 1 / 4 in.) thick min.
1800 mm
(6 ft) max
B
Except for handles, cover
plate not shown.
B
16 mm ( 5 / 8 in.) diameter rod,
4 places
900 mm (3 ft) max
1.5 mm ( 1 / 16 in.) thick gasket
Cover 5 mm ( 3 150 mm
/ 16 in.) thick minimum
(6 in.)
5 mm ( 3 / 16 in.) galv. wirerope lanyard
250 mm
(10 in.) max
Note 1
75 mm
(3 in.)
Note 3
5 mm ( 3 / 16 in.) typical 100 mm (4 in.) minimum
75 mm (3 in.) x 10 mm ( 3 / 8 in.)
bar flange
Roof plate
6 mm ( 1 / 4 in.) reinforcing plate, when required. See Note 4.
38 mm (1.5 in.) x 38 mm (1.5 in.) x 6 mm ( 1 / 4 in.) tab
Section B-B
Notes:
1. Weld size shall be the smaller of the plate thicknesses being joined.
• 2. Cover may be either parallel to roof or horizontal. Opening may be oriented as desired.
3. Bolts shall be 16-mm ( 5 / 8 -in.) diameter in 20-mm ( 3 / 4 -in.) holes, which shall be equally spaced and shall not exceed 125-mm (5 in.) on center.
4. When required, provide 6-mm ( 1 / 4 -in.) reinforcing plate. Width at least 1 / 2 smallest opening dimension. Round outside corners with 75 mm
(3 in.) radius, minimum. Seams shall be square groove butt-welded.
Figure 5.17—Rectangular Roof Openings with Flanged Covers