130 Machine Drawing
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d:\N-Design\Des8-1.pm5 Seventh Print
Copper pipes are used as feed and drain pipes in steam engines, as steam pipes in
marine engines and also for refrigeration coils.
Figure 8.4c shows the joint, with flanges strengthened by providing hubs, ensuring better
hold on the pipes.
8.2.3 Joints for Wrought Iron and Steel Pipes
In the simplest form of a joint, as shown in Fig. 8.5a, flanges are formed at the end of each
pipe, which are fastened by means of bolts and nuts. This joint is similar to a cast iron flanged
joint.
In the other form of a joint, flanges made of cast iron or cast steel are screwed onto the
ends of solid drawn wrought iron or steel pipes. The flanges are fastened by means of bolts and
nuts (Fig. 8.5b).
Wrought iron pipes are made in relatively smaller sizes, which are usually galvanised
all over. Solid drawn steel pipes have greater strength and are used for carrying fluids under
high pressure.
(a)25 25
M112
45 45
4 BOLTS, M18
f^120 f^180
f^140f200
f112
f100
(b)66
f100
f112
f160
f200
4 BOLTS, M16
Fig. 8.5 Wrought iron and steel pipe joints