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GL has a nice table that can be used for calculating window
thickness and appears to be just slightly more conservative than
ABS although I haven't checked all possible combinations. I may
rewrite the flat viewport calculator based upon the GL table. See
Annex C, page C-4.<br>
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On 12/15/2013 4:17 PM, Jon Wallace wrote:<br>
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It looks like GL has similar wording, depending upon actual
usage and detailed testing agreed to by GL a service life
extension may be granted. For the person desiring a certified
vessel I agree new windows would probably be a cheaper route
unless you were very sure the existing windows would pass the
required testing. Scratches are a no-no however so you really
need to get them completely buffed out. The heat produced in
buffing may justify annealing however if the windows were
manufactured to PVHO standards there's a lot of safety factor
built in.<br>
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On 12/15/2013 4:01 PM, hank pronk wrote:<br>
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<div><span>Jon,</span></div>
<div><span>Yes, that is what I call the bible. I just read on
page 940 that ABS accepts the extrapolation method to
determine remaining service life. The test is very
extensive and for a flat disk window it would probably be
cheaper to buy new windows. I did not see that re-
annealing helps.</span></div>
<div><span>Hank</span></div>
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