Reilly Industries, Inc.

C Sherill Henegar

William R Roder

John R Johnson

Described is a preferred method for manufacturing a coal tar enamel-coated steel pipe, in which a primer coat of epoxy resin is applied to a preheated steel pipe, and coal tar enamel is applied to the primer coat prior to full curing of the latter. The resulting coated steel pipes, which also are described, exhibit excellent resistance to cathodic disbondment, heat and water.

Coal tar enamel coated steel pipe and process for same

Described is a method for manufacturing a coal tar enamel-coated steel pipe, in which a primer coat of epoxy resin is applied to a preheated steel pipe, and coal tar enamel is applied to the primer coat prior to full curing of the latter. The resulting coated steel pipes, which also are described, exhibit excellent resistance to cathodic disbondment, heat and water. In some embodiments the primer includes a silane coupling agent.

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Franklin, IN, United States of America

C Sherill Henegar