Pipework

[bernard]

Hi

Has anyone any tips on de-brazing a 3 1/8 inch fitting from pipework.

Regards Bernard

[taz24]

Hi

Has anyone any tips on de-brazing a 3 1/8 inch fitting from pipework.

Regards Bernard

Hi Bernard.

You need plenty of heat. Possibly two sources.
Protect the fitting if it is delicate or strip it down (unless it is scrap).

With 3 1/8 there will not be much flexibility so make sure that when the time comes to seperate you have the space to pull either the fitting from the pipe or the pipe from the fitting.

Heat it up but you will need to get the heat even all the way round, cherry red (hence the two heat sources) use some grips that are large enough and twist the fitting to release it and pull it away.

Obvious points try not to melt it, use either a pepperpot nozzel or somthing large (18 +), protect the fitting unless it is scrap and one

VERY VERY IMPORTANT point ensure the is no pressure in the system at the time (or oil).

Have a fire extingisher close by, wear long sleeve fire retardant jacket and safety glasses.

All the best taz.

[Argus]

.

Unbrazing pipe that size is not the same as, say, a piece of half or three-qaurter inch stuff.

Given the mass of metal involved. the main problem will be controlling the amount of heat needed so that all the filler is melted to enable you to withdraw the pipe from the socket without melting the copper pipe.

Taz mentions more than one flame. You'll need two people handling the flames and one or more man-handling the red-hot pipework. Plus all the safety gear and enough room for all these people.

It's probably easier, quicker, safer and cheaper in the long run to cut the whole thing out, do what you have to do, then replace it with a new section of pipe.

.

[Tesla]

Dont forget to use dry nitrogen before heating and durring heating. Minumising those nasty fosgene clear the nosral stuff and little oil fires.

[bernard]

Hi
Thanks for the replies,I found it quicker to make a new header cheers

Bernard