ASME Pressure Vessels and Water Storage Tanks - page 62

Manways and Manway Extensions
62 •
MANHOLE EXTENSIONS
1-1/2"=1'-0"
MANHOLE EXTENSIONS
1-1/2"=1'-0"
Standard Lid Gasket
Cork - 1/8"
Neoprene - 1/8"
Manways are manufactured and
protected against corrosion using the
same methods and quality control
procedures as the storage tank. The
welding and fabrication specifications
are in strict accordance with
Underwriters’ Laboratories, Inc. and
OSHA. By manufacturing our own
manways, covers and extensions, we
assure our customers of the same high
quality as in our tanks.
Manways are available in standard
18", 20", 24", 30", 36", 42" and 48"
diameters. Larger diameter cylindrical
and custom rectangular manways are
also available. Manway assemblies
include the bolted cover and gasket.
The cover provides a convenient
location for fittings. Four inch diameter
NPT heavy- duty forged fittings
are standard.
When ordering, specify manway
cover fitting arrangement. Manway
extensions lengths can vary and are
made to order.
Manhole Extension
1/4" Thick
Standard Manhole Gasket
Cork - 1/8"
Neoprene - 1/8"
ID
OD
Thickness
Manway/Lid
Bolt
Size
Number
Bolts
Bolt
Circle
18"
24"
0.25"-0.25"
0.5"
18
21"
20"
26"
0.25"-0.375"
0.5"
24
23"
24"
30"
0.25"-0.375"
0.5"
24
27"
30"
36" 0.375"-0.375"
0.5"
42
34"
36"
42" 0.375"-0.375"
0.5"
42
40"
42"
48" 0.375"-0.375"
0.5"
52
45"
48"
54" 0.375"-0.375"
0.5"
60
51"
Diameter
Extension per
customer request
Tank Shell
O.D.
I.D.
Typical Opening Arrangements
for Manway Covers
1...,52,53,54,55,56,57,58,59,60,61 63,64,65,66,67,68,
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