Main characteristics of this process are the
following:
The Bell and Spigot joint is an integral part of the pipe
The cross winding allows enough flexibility in the design to
specify pipe of any axial and hoop strength
The axial strength is normally higher than that of pipes produced
with other processes
Pipe stiffness is not related to joint stiffness which in any case
is higher than the pipe stiffness and guarantees a very stable
joint practically without deformation
The pipe could be made with or without silica sand depending on the
load conditions
