Plumbing/Piping Drawings, Continued
To show pipes that cross each other without connection, draw lines without
interruption. When it is important to show that one pipe passes behind
another, break or interrupt the line representing the pipe fartherest from the
Figure 4-46 shows how to cross pipes.
Figure 4-46.Crossing pipes.
Show permanent connection of pipes, whether made by welding or other
processes such as gluing or soldering, as a heavy dot with a general note or
specification describing the type of connection. Show detachable connections
between pipes as a thick single line and a general notation. The bill of
material lists this type of connection as flanges, unions, or couplings and
whether the fittings are flanged or threaded.
Figure 4-47 shows how to represent permanent and detachable connections.
Figure 4-47.Permanent and detachable
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