McQuay AC 40A - Page 36

b) Copper Pipe
The most commonly used method of joining copper pipes is brazing with an oxy-acetylene
flame and copper filler rods. For this purpose, one end of the pipe is expanded by using
an expander tooling, and the end of the other pipe is inserted into the expanded end. The
joint is then brazed together. [see Appendix 4 for expansion dimensions]
Similarly, fittings are available for such brazing joints:
90º elbow
expanded end
reduce
r
Usually, the pipe outer
diameter will insert into
the reducer inside
diameter
tee
j
oint
expanded end
some may come with
reducer end
Section: 3 Page 34