tapping pipe thread on plastic sheet

[wooden_reefer]

I have several large sheets of 1/2-3/4 inch hard plastic. Given to me free.

I want to drill and tap on them for pipe connection without bulkhead.

I think I will use galvinized threaded pipe section to tap plastic.

I think I will scratch the metal thread to form a cutting edge.

Has anyone done so? Would heating the pipe help?

Actually, I plan to make many small tanks with 1/2" thick plastic coated with a thin layer of colored epoxy.

 

[mcgyvr]

define "hard plastic"
acrylic? acetal? pvc? nylon?

You then have no way of fixing any issue that may occur like you could so simply with a bulkhead..

No idea what size you are thinking about you can but you can buy quite a few bulkheads just for the price of the drill bit..

and other reasons..

 

[billdogg]

^^^What he said^^^

Tapping plastic to put threads in is very simple, with the correct tool. Depending on the size plumbing, that bit will be pretty pricey. Much better off to use a standard bulkhead IMO

 

[wooden_reefer]

define "hard plastic"
acrylic? acetal? pvc? nylon?

You then have no way of fixing any issue that may occur like you could so simply with a bulkhead..

No idea what size you are thinking about you can but you can buy quite a few bulkheads just for the price of the drill bit..

and other reasons..

I plan to use a galvinized nipple as the tap. I would cut or scratch an cutting surface.

 

[schristi69]

If you are going to tap, you should be using a proper tap. Otherwise you are just going to screw up the threads