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Work example #4: Butt fusion prefabrication (onsite)
Crew: 1 primary, 1-3 support
Process: Primary performs the
hot work (alignment, facing,
bead-up, heating, and welding)
on first machine while one
Support preps the second
machine for fusion. Primary
then performs the hot work
on the second machine while
the first connection cools.
Fusion
Preparation
Support can also work on adding
outlets and other connections as
needed or take finished sections
and install them as directed.
Unproductive time
SINGLE INSTALLER
2FUSIONS PER HOUR
OPTIMIZED TEAM
9FUSIONS PER HOUR
PRODUCTIVITY
PRODUCTIVITY
Goal: Maximize connections per
hour by eliminating downtime for
the cooling phases and minimize
in-air connections.
Primary is always performing hot
work on a fusion machine.
3.19
3.18
Tools: 2-3 butt fusion machines,
welding irons and jigs if needed
If two machines are being
used, Support preps a second
connection for the first machine.
If three machines are being
used, Support sets up the third
machine during this time. The
cycle continues so that the