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Hi Rick,
My tiny pea brain finally gets these figures, I understand the thickness
of window - to - diameter of window ratio limits,
I don't see where they talk about the metal
viewport housing though? It doesn't seem like they are giving any
dimensions for the metal. On page 38, under viewport flanges, they talk
about dimensioning the flanges but they don't give you any actual numbers.
Obviously the flange has to be the thickness of the acrylic in that
dimension. And I get the retaining ring and the bevel, and the o ring
tolerances. I haven't seen any numbers for the thickness of the flange in
the other dimensions. Is there a thickness to diameter
ratio for the metal as well?
Thanks
Brian
----- Original Message -----
Sent: Monday, December 19, 2005
13:59
Subject: [PSUBS-MAILIST] viewport
calcs
from pvho-1
for a standard round flat viewport
thickness greater than or equal to .5
inch
t/dia greater than or equal .125
design pressure * cf of six = critical
pressure
do= dia outside
di=dia inside of seat
do/di >or =
1.25
for a 1000 ft depth design the t/di greater than
or equal to.25 ie a two inch thick view port will have a max di of 8 and and
be 10 inch do
for a 500 ft depth design the t/di greater
than or equal to.195 ie a two inch thick view port will have a max di
of 10.25 and and be 13 inch do
for a 250 ft depth design the t/di greater
than or equal to.165 ie a two inch thick view port will have a max di
of 12.12 and and be 15.15 inch do
i hope that this helps
rick m
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