Direct buried, directional drilled or slipline pipe. Epoxy Coating. Applied in a thin film to a near-white blast steel surface, epoxy coating is a bonded dielectric coating that provides optimum protection against abrasion, corrosive fluids, and extreme temperatures. Epoxy coating is durable and impact resistant resulting in a coating that will not crack, split, or fracture with impact. Northwest Pipe Company applies epoxy coating Epoxy Coal Tar Coating Pipe , Anti-Corrosion Pipe , Coated Epoxy Coal Tar Coating Anti-corrosive Pipe are composed of epoxy and coal tar pitch. They are two-component coatings of A (epoxy) and B (curing agent). They have excellent adhesion, toughness, moisture resistance, water resistance and chemical resistance.