Internal diameter coatings for fire protection piping

Pipes and tubular conduits – Distinct layers – Coated

Reexamination Certificate

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Details

C138S141000, C138S146000, C138S137000, C138S140000, C264S173110

Reexamination Certificate

active

07819140

ABSTRACT:
The present invention relates to in-line coating of a continuously moving substrate, such as a tube or conduit, preferably of the type used for applications such as fire sprinkler piping. The present invention includes a fire sprinkler pipe defining an interior wall surface surrounding an internal pathway. The interior surface is coated with a coating that reduces the degradation of the interior surface and provides a barrier between the interior surface and fluid within the pathway to resist degradation of the interior surface over the life of the tube or conduit.

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