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Hallo StuartSteam,
Interessant te lezen over je “avontuur”van het ketel solderen. En leerzaam.
Een vraag: je spreekt over een poging te solderen met propaan/zuurstof. Wat bedoel je daar mee en waar mee is het uiteindelijk wel gelukt? Met een grote propaanbrander? (dakbrander??), zoals te zien op één van de foto’s?
Ben benieuwd naar het antwoord.
FodenGewoon dikke dakbrander. Maar we de tijd nemen dat het koper de hitte kan opnemen is mijn ervaring.
Propaan zuurstof gebruik ik alleen nog om vastgeroeste bouten van mijn auto los te maken…Forgive me that this is in English – my Nederlands is not very good. The big problem with making a kettle is having enough heat. In an ideal world propane for most of the heat and then oxy propane for spot heat. what can happen is that it takes too long to get enough heat and the flux is worn out. If this is the problem then a high temperature flux like HT5 may help. Ceramic fibre is an ideal way to keep the heat in. Plenty of flux mixed with water and apply, then heat when the flux goes glassy it is time to try the silver solder it should flow easily, but the gap should be no more than 0.1mm or so. It will not form a fillet like welding.
I’m rebuilding a BR 9F in 5″. Good Luck. Noel.Looking at the picture of your test pump the pipe should be much shorter and also of smaller size. A 6mm hydraulic pipe with the right fittings. A valve should be on the fitting to the model so that once pressure is up you can isolate it, if there is much temperature change during the test this may cause a rise or drop in the reading. Best wishes Noel.
Hello Noel,
Do you think this kind of ceramic fibre can do the job?: Keramisch isolatiedeken 1430° graden (High Aluminia).
What wil happen when you hit this material with the propane flame? Giving a lot of smoke? Will it melt? Catch fire?
So far I use fire resistant bricks for soldering, but I want keep the heat as concentrated as possible on the spot where I need it.
Thanks for your reply
FodenHi Foden, ceramic fibre is like white wool and when heated will just glow, no smoke or smell and it will not melt or burn. 1430*C is just about white heat ! For small items you can just wrap them in the fibre to solder them. If you search youtube for DUBIOUS ENGINEERING – melting brass in a spin drier. You will see me operating a furnace I made 30 years ago, part of the lining is fibre, the white paint was put on by the maker and the inside of the furnace is about 1400*c. It is very efficient,It is used to line kilns for making pottery and if you know the right people you may be able to get both the bricks and fibre when they are relined. Best wishes from the UK. Noel.
PS it will do the well !Hello Noel,
Thank you for your reply. I watched the YouTube video “Melting brass….” : interesting!.
I found a supplier of this Ceramic fibre, who delivers all kind of materials used in building ovens, heaters etc. They also sell smaller quantities which is convenient in our hobby.
Thanks again.
I will carry on with comp[leting my boiler.
Foden.
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