Using 1/2 or 3/4 copper pipe in BB I whot water heat.Whats best way to secure to reduce any noise.Should I install insulation first and then clamp or clamp and then add insulation.Is copper clamps best or plastic ones.

 

No setback at night and use an outdoor reset controller... I know, it sounds like a silly answer for what you're were asking but copper expands and contracts as it goes through heating cycles, and it's the expansion that causes the noise. If you really want a quiet system, clamps can only help so much.

Whenever the piping passes through wood, make sure the hole is big enough so that there is no chance of rubbing. Wood can make some beautiful sounds if you give it the chance.

Think about where the clamps can be where they don't interfere with the expansion. The average coefficient of expansion for copper is 0.0000094" per inch per degree F, between 70°F and 212°F, so 20' of copper of going from 70°F up to 180°F, will expand by ¼".

I'm not aware of any clamps being any better than others, but Grady or KField would let you know if there were better choices out there.

 

Don't use clamps. You want that pipe to be able to move. I prefer the vinyl coated pipe hangers.
When I was new in the trade & installed my system I made the mistake of drilling my holes too tight. My baseboard creaks & groans because of it. The only upside to this is when I hear it, I know the heat is working. I'll fix it someday, maybe. LOL