Abstract:
As far as pipes are concerned, mainly metallic pipes
have been used so far. With the development of synthetic
resin industry, however, synthetic resin pipes
have also been developed. The development of its
molding technology has greatly improved the performance
of synthetic resin pipes, replacing metallic pipes
rather significantly.
The mainstay of the synthetic resin pipes is the
rigid pvc pipe, being especially useful for transporting
strongly corrosive chemicals and gases because of its
superb resistance to corrosion. The rigid pvc pipe is
non-toxic and in no way reacts with the fluid being
transported nor affects the taste, flavor and color.
Besides, smoothness of the interior surface of the pipe
precludes any pressure loss related to fluid flow or
occurrence of the deposit or scale which interfere with
the fluid flow. Being flameproof, the pvc pipe is free
from the hazard of fire. It is electrically an insulator
and electrolytic corrosions, which frequently occur in
metallic pipes, can be prevented. Particularly, since it
has a large tensile strength and flexible, the pvc pipe
is not subject to pressing or denting by pressure. It is
light and makes its transportation and subsequent
piping relatively easy.