Brazing

[eggs]

Good afternoon chaps.

I have just found out that a job we are starting doesn't allow acetylene on site. How do I braze the big pipe on my VRV?
What would you use if you had to change a compressor?

Sorry for the schoolboy questions but I've always used oxy/acet on pipes 3/4 and up and only ever used it on comp changes & VRV/VRF connections. :confused:

Cheers

Eggs

[Recoilzn]

You could always try the zoomlock from sporlan, but theres added chances of leaks.

[Brian_UK]

Use propane/oxy.

[chemi-cool]

You will need different tip for propane, brazing temp is a bit lower but there will be no problems.
I only use it for every braze I do up to 3" pipes.

[monkey spanners]

Oxy Propylene is what i use, https://www.youtube.com/watch?v=G7Dkfa0Si70

[cadwaladr]

Me too,as said the tip needs to be larger and acetylene is one heavy bottle.

[charlie patt]

We had this recently on one site we used Vulcan lock rings that site we could not use acet or profuel nothing so we braised the big joints outside the property then used Vulcan on smaller stuff and got um to sign a waiver if Vulcans ever leak

[eggs]

Thanks chaps. I'll look in to propane then.
Why on earth you can use one gas and not the other is beyond me. Am I less lightly to torch the shopping centre with mapp gas or propane than acet ?

The mind boggles

Eggs

[hookster]

Probably the sensible thing would be to approach the project management team with your facts and figures to see why the blanket ban is in place as usually you can get it lifted with the correct procedures in place.

Show that you insurance covers you to work with oxy / acet (I usually find our subcontractors do not have sufficient cover even for Mapp gas let alone Oxy / Acet)
Have you RAMS prepared in advance with decent control measures, including outside cage storage for gases with extended length pipes for work etc.
Thermal camera post work surveying for hot spots each day post works etc.

Blanket banning on construction sites is just a usual approach to prevent the cow boys shootin and tootin!

[eggs]

That makes sense Marc. I'm on a mission to get the blanket ban overturned because I'm a special little snowflake. Not like the rest..
I'll keep you posted on how I get on.

Cheers

Eggs

[eggs]

Apparently we need a:
Turbotorch STK-11 Double Barrel Brazing Torch with some mapp gas.

They're the future, just like garlic bread..ill give it a whirl. Anybody tried one?

Cheers

[monkey spanners]

They are ok, but use a lot of mapp, have done 1 3/8" with it inside with no wind etc.

[chemi-cool]

Apparently we need a:
Turbotorch STK-11 Double Barrel Brazing Torch with some mapp gas.

They're the future, just like garlic bread..ill give it a whirl. Anybody tried one?

Cheers

looks like a toy, you need oxygen for brazing copper or it will take you a long time.
propane and oxygen torch is what you need.