tricky brazing job

[philjd26]

as the title says, i have a braze to do tommorrow it is my second attempt :rolleyes: at this one...it is very difficult to get any heat at the back of the pipe so i have pin hole at the back, it just one of those ones....:mad:

anyone got any suggestions or ideas for getting at awkward brazes..

rgrgds phil

[multisync]

Gently bend the nozzle round so it points back towards you and same for rod,

[Brian_UK]

Don't know what size pipe you are working on but can you just heat the whole section and run the rod down the back to get a covering over the pipe.

Or, is it feasible to cut out the section and put a new piece in?

[philjd26]

1" 1/4... it is the conection to a compressor, it has a copper cladding on steel connection, would silver be my best option as the cladding may have diminished from excessive ehh attempts....its right at the back with very little room to manouver..

rgrds phil

[philjd26]

il give a go my man..

cheers

[monkey spanners]

I'd give it a really good clean with some abrasive stuff and them some degreaser. Maybe get the mapp gas torch and the oxykit on it to get it hot and just use the oxykit once hot with some silver solder rods and flux.

[glenn1340]

Oxy with silfos 15 and have a mirror ready so you can visually check it before the pipe has chance to cool to much. Repeatedly heating the pipe will weaken it and possibly make it porous. Oh, and keep the nitrogen flow to the absolute minimum.
The worst one I had was laying on my back in the rain soldering a 7/8 pipe under a chiller using a mirror to see where I was soldering. Oh how I laughed!

[nike123]

I use these (and mirror) in hard to reach and see places. It works every time.
http://farm4.static.flickr.com/3602/3452320876_8861fe8f4b_o_d.png

[tonyh]

Dont know if this will help to get heat to back of pipe SRW sell them for around £35

[superswill]

i make my own tips up for tricky jobs using standards nozzles then bending them to suit with a hand bender,works for me and a cheep alternative to specialized ones (that Ive not seen before) thanks nike & tony

[glenn1340]

I use these (and mirror) in hard to reach and see places. It works every time.
http://farm4.static.flickr.com/3602/3452320876_8861fe8f4b_o_d.png

Thanks Nike I`ll get my boss to get a set of those, they`ll save a few burnt wires and charred insutube:D

[superswill]

Thanks Nike I`ll get my boss to get a set of those, they`ll save a few burnt wires and charred insutube:D

glenn i would also be interested in a set,please post the relevant info when when you have it,price ect ect

[casstrig]

Thanks for the info Glenn I also usually modify standard nozzles by bending them but there is a limit to how much you can bend them so these will be very useful.Also besides cleaning really well and decreasing the pipe use a brazing rod with 15% silver as it has a lower melting point.

[Quality]

I am pretty sure danfoss instructions recommend 15 % Ag

[glenn1340]

glenn i would also be interested in a set,please post the relevant info when when you have it,price ect ect

I asked our buyer to contact Rothenberger and guess what? they`re not available in the UK:mad: He`s looking elsewhere and if anyone can track a supplier down he can. I`ll let you know as soon as I do.

Glenn

[robin r33 gtr]

I use the shield from my turbo torch to reflect the heat if I cannot get around the back of the pipe.

A bit late now but I always start brazing from the back so you get the hard bit first.

[nike123]

I asked our buyer to contact Rothenberger and guess what? they`re not available in the UK:mad: He`s looking elsewhere and if anyone can track a supplier down he can. I`ll let you know as soon as I do.

Glenn

ROTHENBERGER UK Limited


ROTHENBERGER Great Britain
2, Kingsthorne Park
Henson Way, Kettering
GB-Northants NN16 8PX
phone: +44 15 36 / 31 03 00
facsimile: +44 15 36 / 31 06 00

[Miles Brennan]

Not good to use Silfos 15 on a copper coated steel pipe, when heating you can melt the copper away and the phosphorus in the Silfos can form brittle iron phosphides and the joint will fail.
It probably can be done on a bench where you can see the joint easily and control the heat, but in situ...

Also melt range is 644-800'C (although mostly molten at around 720'C) - I would suggest a low temperature silver braze alloy - preferably something like IPM55S - which melts 630-660'C - this means less heat and you will not end up with potentially brittle joints.

If you need any more help give me a mail on miles.brennan@blueyonder.co.uk

[Prince Vaillant]

Do a google search for Z600 SILVER SOLDER PER STICK 55%, these should be ok

[superswill]

ROTHENBERGER UK Limited


ROTHENBERGER Great Britain
2, Kingsthorne Park
Henson Way, Kettering
GB-Northants NN16 8PX
phone: +44 15 36 / 31 03 00
facsimile: +44 15 36 / 31 06 00


Originally Posted by glenn1340
I asked our buyer to contact Rothenberger and guess what? they`re not available in the UK He`s looking elsewhere and if anyone can track a supplier down he can. I`ll let you know as soon as I do.

Glenn