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Posted by on February 13, 2007, 12:33 am
On 2=D4=C26=C8=D5, =C9=CF=CE=E712=CA=B105=B7=D6, "james" <jamesf...@gmail.c=
om> wrote:
> I would like some tips to improve my copper pipe/copper fitting
> brazing technique. I practiced yesterday afternoon on some scrap 3/4"
> copper pipe and fittings and my joints are leak free but there's room
> for continuous improvement. I'm not producing nice consistent fillets
> even though the joints are filled.
>
> I'm using oxy/acet, #2 tip, about 2-3 PSI, neutral to slightly
> reducing flame and Sil Fos 15.
>
> Is this configuration about right for 3/4" connections?
>
> Do you like to start at the bottom of the joint and work your way to
> the top or vice versa.
>
> I know Sil Fos on copper to copper doesn't require a flux. However
> can flux be used? (ie in order to better gauge temperature of the
> joint). Will flux help achieve better joints?
>
> Do you like to aim the torch flame towards the pipe end or the fitting
> end as your sweeping back and forth? Or do you aim it perpendicular to
> the axis of the pipe? Or do you like to heat the joint by going up and
> down or figure 8?.
>
> Do you actually touch to inner cone of the flame tip to the fitting or
> do you back it away a little bit to reduce any chance of burn thru?
>
> I'm using Sil Fos 15 ribbon filler. Would round work better? What
> diameter?
>
> TIA.
Zhejiang xinyu fittings co.,ltd is the manufacture specialized in
producing and exporting the HAVC & Plumbing products ,including the
copper fittings, brass fittings,pex fittings, sprinkle heads, air-
condition and refrigeration spare parts. Products follows
International Standard YTG 03-97, British Standard BS864-2/EN1254,
American Standard ASME B16.22 and China Standard GB/T 11618-1999.
Right now, our main markets are SoutheastAsia North American
European and Middle east.
www.xinyu-fittings.com
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