[PSUBS-MAILIST] Clearances

[Daniel Lance via Personal_Submersibles]

Rick,
Google "Flange Facing" or look on YouTube,  its very commonly used to
refurbish the sealing surfaces of pipe flanges and even large diameter heat
exchanger flanges in Power Plants and Oil Refineries . A similar machining
process would be implemented in your situation . "InSitu" just means in
"place"

On Tue, Dec 10, 2024, 5:51 PM Rick Patton via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I am not familiar with what you call "in-siku" machining?
>
> Rick
>
> On Tue, Dec 10, 2024 at 11:56 AM Daniel Lance via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Rick,
>> Sean's suggestion of finding a machine shop that can do the in-situ
>> machining to enlarge your viewport frame would probably produce the least
>> amount of hassle. That's assuming there will be enough metal left on the
>> perimeter flange after the machining process.
>> If you have access to Jerry Stachiw's book "Handbook of Acrylics" it
>> would certainly be worth the read . It goes into great detail outlining the
>> recommended procedures for fabricating, machining and then annealing. A
>> second annealing isn't out of the question ...it just must be done at
>> carefully controlled lower temperatures.
>> If you decide to go with reducing the diameter of the acrylic viewport ,
>> one possible company that might be able to help you is "
>> www.hydrospacegroup.com" . If not they might be able to recommend
>> someone that can ?
>> Dan
>>
>> On Mon, Dec 9, 2024 at 10:18 PM Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>>
>>> Sent from my iPhone
>>> I got a real surprise yesterday, I went to fit my large viewport in
>>> front on my K-350 and it wouldn’t slide inside the receiver that I had
>>> machined for it. They made it about 1/4” too small!
>>> I should have double checked it before welding it into the front head
>>> but didn’t.
>>> I had the viewports cut in California and is to speck, 15”.  Kitteredge
>>> called out using gasket but a lot of you I believe used Silaflex that comes
>>> out of a tube.
>>> I found someone who can chuck up something that is 16” in diameter so
>>> will have him turn it down 1/4” or so, so it will fit in the receptacle but
>>> I need enough of a gap on the edges for the Sikaflex to ooze out.
>>> Your thoughts?
>>> Rick
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