Hey, I'm just telling them how.. LOL. The only time you should need to do this is if they have been hardened, like old aircraft plug washers. The cheap AME / AP's heat the used ones up and put them back. I spend the buck each and put new ones in right out of the box.
Copper work hardens. After a compression cycle or two, it won't upset and seal the same as it would when fully annealed. May or may not make a difference every time. If I don't have new ones on hand, I will always anneal copper or brass sealing washers before reuse so I am less likely to have to go back in. Takes a minute and gives me peace of mind. I consider it similar to a lot of the small details that go into building a good motor. Will the motor run if you throw plasti-gage at the used bearings and hone the bores with a three pad hone on a drill? Probably. But the result won't be as good as if you use good shop practices.
Stainless seems to be what has an issue sometimes. Steel and NiCop not so much.
So they say. I guess I've been lucky. I wonder what material the OP is using.
What type of tubing? Steel?? Ni-cop? stainless???
thank you for your time
