Petroleum and Chemical Storage Tanks - page 66

MANHOLE EXTENSIONS
1-1/2"=1'-0"
Manways and Manway Extensions
66
MANHOLE EXTENSIONS
1-1/2"=1'-0"
Typical Opening Arrangements
for Manway Covers
Standard Lid Gasket
Cork – .125"
Neoprene – .125"
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. 4” 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
.25" Thick
Standard Manhole Gasket
Cork – .125"
Neoprene – .125"
ID
OD
Thickness
Manway/Lid
Bolt
Size
Number
Bolts
Bolt
Circle
18"
24"
.25"-.25"
.50"
18
21"
20"
26"
.25"-.375"
.50"
24
23"
24"
30"
.25"-.375"
.50"
24
27"
30"
36"
.25"-.375"
.50"
42
34"
36"
42"
.375"-.375"
.50"
42
40"
42"
48"
.375"- .375"
.50"
52
45"
48"
54"
.375"-.375"
.50"
60
51"
Extension per
customer request
Tank Shell
O.D.
I.D.
Diameter
1...,56,57,58,59,60,61,62,63,64,65 67,68,69,70,71,72
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