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SCH40 vs SCH80 PVC ID Surface

A place to ask general spud cannon related questions.
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SCH40 vs SCH80 PVC ID Surface

Unread postAuthor: dewey-1 » Sat Mar 20, 2010 12:08 pm

I have noticed that SCH40 PVC pipe has a rather irregular surface on inside of the pipe. The inside is not as "smooth" as the outside.
Has anyone else noticed this or does this vary with the brand?
Does SCH80 PVC pipe have he same ID surface or is it "smoother"?

Another question relating to this ID surface, especially to any one with a piston hone. How well will a piston hone work on PVC pipe? I am sure on iron/steel it may work OK.

On softer metals and PVC will the stone clog up to quickly? This is assuming a slow rotational speed.
This seems like an easy way to hone piston sleeve to piston diameter fit?

Any comments from those with access to a hone?
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Unread postAuthor: clemsonguy1125 » Sat Mar 20, 2010 1:16 pm

I think it differs by brand because my pipe is the same on the inside and outside except on 1/2 inch because its smoother on the inside than outside
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Unread postAuthor: daberno123 » Sat Mar 20, 2010 2:13 pm

I've never been able to tell a difference before. What brand of PVC pipe are you talking about?
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Unread postAuthor: deathbyDWV » Sat Mar 20, 2010 2:54 pm

It must just be the maker as to why it's irregular. All of the new pipe I buy in nice and smooth on the outside and inside. But I do have some old scraps that are quite bumpy on the inside...
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Unread postAuthor: Gippeto » Sat Mar 20, 2010 10:57 pm

I have a cylinder hone and a couple brake cylinder hones too...but no pvc. :roll:

I did notice that the 1 1/4 pvc that I built my first piston gun from had an irregular surface finish on the inside as you noted.

I can't say for certain...never having tried...but if one were to hone the plastic with a flood coolant (water?) to keep surface temps down, perhaps there would be no melting and no plugging of the hone?? I just can't see why it would work too differently from honing brass or aluminum.

I have to pick up some copper etc. tomorrow so I'll have a look and see if they have a short piece for cheap. If so, I'll give it a whirl...see what happens.

Results or let down...late tomorrow or Monday.

Edit:No joy...or short lengths to be had. Checking another supplier in the morning.
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