Schedule 80 PVC

[GoldDigger]

I have rarely ever worked with Schedule 80 but helped a coworker make a sign frame with it. Rectangular frame used to hang a banner. Pipe, & sharp 90 plumbing elbows. He sanded the pipe ends and used pipe cleaner on them, then glue, but put no glue in the elbows. I was trained to put glue on both surfaces and have always done this. But he has made a lot of these frames and they have been holding up for a few years. I never sanded PVC either, new to me.

How do any of you glue Schedule 80?

Sanded, as in roughened the surface, or as in trued up the ends to bottom out uniformly in the fittings?
When using primer with solvent glue the surface roughness is not really significant to the joint strength.
Among other things, Schedule 80 is used for plumbing at higher pressures, and to get a suitably strong joint primer/cleaner must be used.

 

[4x4dually]

I've always primered and glued both sides but the coating of glue on the socket side is way lighter than the one one the spigot side so it doesn't push much glue out into the joint on the inside. Basically I just wet the socket side all around but nothing more.

 

[electrofelon]

I was always taught to twist back and forth a time or 3 as I set the joints as well. And definitely glue both sides.

That does not sound like good practice to me. I would recommend following the instructions on the cement can.

 

[4x4dually]

That does not sound like good practice to me. I would recommend following the instructions on the cement can.

Agreed. I spin them just a tad, but not quite a 1/4 turn. "Back and Forth" sounds like a bad idea.

 

[4-20mA]

Just a zig zag or so... not spinning it. Whoa.

 

[FionaZuppa]

It's an interesting subject.

"fused" vs "bonded" areas of the fitment.

I wonder if gray electrical PVC is made to same geometric standards as plumbing pipe?