Threading 2 inch PVC pipe

[Jack01]

I am using 2 inch PVC pipe for a experimental project, not for plumbing
I like to thread the pipe, I checked available resources and found Tap-Die up to 1 inch in size 
So far I have not found threading tap for 2 inch pipe at reasonable cost, what I found are the taps for rigid pipe, which I am reluctant to get as that increase the cost also the threads are different.

Any one have any ideas on where to find the 2 inch tap for PVC ?

I cannot use the PVC female fitting on this project as the outer diameter increase.

Thanks

[museumguy]

Do you know anyone with a metal lathe? Machining threads is easy on a metal lathe.

[JosephP]

You want NPT threads? You can probably cut the threads in PVC with black iron or galvanized fittings. I'm not sure if it will work on something that big, but I have done it for smaller fittings and it works great..

[MstrCarpenter]

You want NPT threads?  You can probably cut the threads in PVC with black iron or galvanized fittings.  I'm not sure if it will work on something that big, but I have done it for smaller fittings and it works great..

They'll cut 2". Pipe dies for black iron started cutting fine but began deforming my PVC pipe as they progressed. I initially tried just heating the pipe and threading on a coupling but the results were unpredictable at best. I just cut a few shallow slots to make "teeth" and filed down the threads just in front of them. I sealed the threaded joints with G.E silicone. It acts as a lubricant while tightening, leak-proof under pressure, and they'll come apart if needed.

[Jack01]

You want NPT threads?  You can probably cut the threads in PVC with black iron or galvanized fittings.  I'm not sure if it will work on something that big, but I have done it for smaller fittings and it works great..

Joseph   I found 1" Iron fitting at local Big box store and works on 1 " PVC ok, threads are not deep, but it will accept threaded PVC fitting ok.

The did not have 2" iron fittings  so I need to go to downtown plumbing store and pick up one to do experiment.

Thanks

[JosephP]

Joseph   I found 1" Iron fitting at local Big box store and works on 1 " PVC ok, threads are not deep, but it will accept threaded PVC fitting ok.

The did not have 2" iron fittings  so I need to go to downtown plumbing store and pick up one to do experiment.

Thanks

  glad it worked!

[brianwelch]

JosephP That sounds like an interesting idea...might suggest filing some grooves across the threads to allow waste to fall away...

Edit:Looks like MstrCarpenter was a little quicker on the draw...

[blackhat]

Any decent supply house should be able to sell you threaded PVC sch 80 nipples in a span of different lengths.

[JTTHECLOCKMAN]

Why not just glue a threaded connector on? Used in electrical field all the time. I am sure plumbers use them too for connecting to steel pipe stacks.