How can i take 3inch steel pipe and reduce down to 22mm copper pipe?

Answer 1

you may use whatever of the suggested above, but, be very careful when choosing the MATERIAL, when different metals come in contact CORROSION is a very high possibility.
i'd suggest steady (or step-by-step) reduction coupling of either material, but when the final stage to connect the two metals, use a hard plastic coupler.

if not possible, please consult using corrosion protection!

good luck

Answer 2

Either by rotary hot swageing, which I reckon is going a bit far because the technique is not widely known:the alternative is a piece of steel or copper pipe,maybe two,so they nest,and silver solder or braze on a hearth.That joining method will give good joint penetration.As a matter of interest to you ,such an assembly (copper to iron)is very liable to electrolytic corrosion if it's in wet service,especialy if salts are present.You might need corrosion inhibitors.
I can't really do justice to this problem because I dont know lengths or,more importan,inside and outside diameters.
It might be a lot simpler than I have said.Hope it helps.

Answer 3

Alchemy. I can't think of any other way to reduce steel to copper.
Seriously, fabricate a reducing box - think of an exhaust silencer - with a 3 inch inlet at one end and a 22mm outlet at the other.

Answer 4

The easiest way is probably a 3" x 1" weld reducer to a 1" BSP (Female) coupler to a 1" male iron x 22mm compression fitting.

Answer 5

I should think you will have to,'ad hoc', get a 3inch to 1inch iron reducer and a gland to take the copper pipe

Answer 6

You are going to end up with a threaded adapter or bushing at the point of crossing over from steel to copper.

Answer 7

That's an unusual reduction, you will have to get a reducing steam socket from 3"/1" then a 1" steel to 22mm. (brass) connecting bush, only found with heavy plumbing suppliers

Answer 8

Reducer.

Answer 9

Hi, we have 22mm under floor in bathroom from the immersion heater, then it changes to 15mm to the taps, cannot say we have had any problems. The shower is 15mm pipes from the mains, that gives a more direct pressure. Any help?

Answer 10

Well maybe you should try nuclear fission in order to change the steel atoms into copper atoms and recast it by mechanical methods,such as forging,powder metallurgy,etc.
Oh,don't forget to fly to Stockholm to take next year's Nobel Prize by the way.