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Definition:

Threader Coil

1) A narrow width coil of TU plate with a base weight between 75# to 100#. This coil is used anytime the line is to be shut down or on a line start up. 2) The last coil threaded through the line. The threader coil remains in the line until start up. 3) A coil fed into the line only to make a connection between sizes.