All of the
EPCO anodized aluminum Zero-Leak Gold Plugs, with the exception
of the –2 size, successfully completed the 2,000,000 cycle
impulse test. All of the plugs, including the -2 successfully
completed the proof and burst evaluation.
The EPCO Anodized
Aluminum Zero-Leak Gold plugs sizes –3, -4, -5, -6, -8,
-10, and -12 passed the one million-cycle impulse requirement
by NFPA fatigue standard T2.6.1R2-2000 and were run an additional
one million cycles and passed with no failures. The test ran continuously
24 hours a day, seven days a week with the exception of being
shut down for equipment maintenance and failures should they occur.
The marks placed on the plugs and manifold concluded that there
was no movement of the plug relative to the manifold for the entire
two million cycles. The burst pressures ranged from 18,853 psi
to 32,040 psi, with the requirement of 12,000 psi to pass. The
client requested all plugs be pressurized beyond the 4:1 requirement
(12,000 psi) and continue increasing pressure until failure of
the fitting or limitations of the equipment are reached. The plugs
also passed the proof test.