Solder steel to copper????????

[leakydave]

Ever seen this before? Called to a leak through ceiling last week... steel pipe (1970's) soldered with copper fittings. Probably been there 30 years, but now leaking. Have a photo but don't know how to upload, sorry?[/img]

 

[Agile]

Its generally considered better to use compression fittings with rubber "O" rings to join these situations.

Be aware the steel could be only a few microns thick!!!

Tony

 

[chrishutt]

Its generally considered better to use compression fittings with rubber "O" rings to join these situations.

Never heard of compression fittings with rubber "O" rings (apart from Leadlocs, etc.). Do you mean those heavy galvanised compression joints designed for normal mild steel tubing? They have rubber olives but they're a V section and look like this.

 

[Balenza]

Silver solder is the answer in these situations.

 

[Agile]

Yes, Chris, I was using the term "O" rings in a more general sense!

Tony

 

[chrishutt]

But I think leakydave is referring to the thin walled steel pipe produced at the time of the copper shortage to the same dimensions as copper tube. It was soldered with copper fittings, but I think the flux had to be different - non-aggressive to steel. The heavy gauge compression fittings above are for normal mild steel tubes which are normally threaded.

 

[doitall]

"Bakers Fluid"

 

[Strevs]

Press fit......solves a myriad of problems!

 

[Sylvan Tieger]

When I have to connect copper /brass /bronze to steel I use the union carbide 25 M rod .. It is a bronze rod prefluxed and great for dissimilar metals (no white metals)

 

[Agile]

You are in the USA where techniques are different.

You also seem to have far too much time on your hands so that you have to resort to repling to postings a year old!

 

[Softus]

When I have to connect copper /brass /bronze to steel I use the union carbide 25 M rod .. It is a broze rod prefluxed and great for dissimilar metals (no white metals)

Surely you could just shoot it with an Uzi 9 millimeeeetaar?

 

[Sylvan Tieger]

You are in the USA where techniques are different.

You also seem to have far too much time on your hands so that you have to resort to repling to postings a year old!

YUP I look for old postings answer them and wait to see how many blokes will answer me saying your answering an old post

 

[Sylvan Tieger]

Shame how Mr soft died of cancer of the brain BUT It does explain a lot

 

[Sylvan Tieger]

You are in the USA where techniques are different.

We also have the dresser couplings, mechanical joints. compression joints but I do not care for them as the coefficient of expansion per degree temperature change are different so I feel high temperature brazing is safer when combining metals with no threads and of made of various alloys

 

[assured heating]

Copper and steel are disimaler metals and should not come into contact as you will get electrolytic corrossion which is why it is probably leaking in the first place