Window for pressurized chamber made from laminated glass?

[battleship81]

I need to put a 7"X10" window in a chamber that will experience pressure up to 2 atm gauge. Due to chemical exposure (amines) and high operating temperature (105C+), I have been unsuccessful in finding a transparent plastic that I can use. So i am considering using thicker (.5 in) laminated glass. I am crazy for considering this? If not, where's the best place to look for this kind of glass? Or, is there a transparent plastic that I just haven't heard of that can withstand those conditions?
Thanks!

 

[hacksaw]

commercial sight glasses are available for those conditions and beyond up to 6" diameter viewing.

square windows are not advisable because of the stress concentrations.

 

[ivymike]

don't have experience w/designing site glasses. some ideas come to mind, though
- engine test cells often have large panes of glass, but with a wire mesh inside
- could you mount a thin pane of glass to the front of transp. plastic, to protect the plastic from chems?

 

[ivymike]

alternatively, thick glass, then thin plastic to catch shards?

or... thin glass, pressurized intermediate space w/inert gas, then thick plastic?

 

[Ron]

Tempered glass should be fine. Will be thick and will distort view. Agree with hacksaw regarding shape and with IvyMike on his points as well.

 

[unclesyd]

Here are some borosilicate square glass with different thicknesses. It looks like you maybe able to get what you need.

http://www.gageglass.net/sight/index.html

 

[MintJulep]

In round numbers your talking about a ton of force on your window.

I'm too lazy to look up the appropriate formula and material properties, but my gut tells me the half inch thick isn't thick enough.

 

[TGS4]

Take a look at ASME PVHO. They use windows in pressure vessels for human occupation. Guidance regarding thickness and materials should be found there.

 

[Ron]

MJ..over 29 psi....4200+ psf