The purpose of an onsite pressure test is to establish that the
installed section of line, and in particular all joints and
fittings, will withstand the design working pressure, plus a
safety margin, without loss of pressure or fluid.
Generally a test pressure of 11
/2 times the safe working
pressure for the pipe installed is adequate. Whenever
possible, it is recommended that hydrostatic testing be
carried out. It is suggested that the following hydrostatic test
procedure be followed after the solvent-welded joints have
been allowed to cure for a minimum period of 24 hours at
73ºF (timed from the cure of last joint). For more detail, refer
to the joint cure schedules in Table 22 in the Installation
section