System and method for protecting one or more pipes against corrosion and corrosion-protected pipe

A method of installing an underground carrier pipe, the method comprising:

• positioning a plurality of polymer casing tubes over the carrier pipe and connecting them together to form a casing over the carrier pipe while the carrier pipe is above ground such that a continuous gap is defined between an interior surface of the casing and an exterior surface of the carrier pipe, the continuous gap extending continuously along each of the plurality of casing tubes;
• substantially filling the continuous gap with a potting material while the carrier pipe is above ground to form a corrosion-protected pipe assembly;
• and
• pulling the corrosion-protected pipe assembly into a bore;
• wherein the step of filling the gap comprises injecting the potting material through a port extending radially through the casing.

A corrosion-protected pipe assembly received in a bore, the pipe assembly comprising:

• a metal carrier pipe having a first transition portion, a second transition portion, a length extending between the first transition portion and the second transition portion, and a wall extending along the length having an exterior surface and an interior surface defining a lumen;
• a polymer casing having a first end portion adjacent the first transition portion of the carrier pipe, a second end portion adjacent the second transition portion of the carrier pipe, a length extending between the first end portion and the second end portion of the casing, and a wall extending along the length of the casing having an exterior surface and an interior surface extending around the exterior surface of the carrier pipe wall along the length of the casing to define a gap between the interior surface of the casing and the exterior surface of the carrier pipe along at least a segment of the length of the casing;
• flowable potting material substantially filling said gap and having at least one corrosion-resistant property selected from the group of corrosion-resistant properties consisting of moisture transmission inhibitor and volatile corrosion inhibitor;
• and,
• a pull head mounted on the corrosion-protected pipe assembly configured to transmit a pulling force to the corrosion protected pipe assembly for pulling the pipe assembly into the bore as a unit;
• wherein the gap comprises a section extending radially from the exterior surface of the wall of the carrier pipe to the interior surface of the wall of the casing, the flowable potting material extending radially in the section of the gap continuously from the exterior surface of the wall of the carrier pipe to the interior surface of the wall of the casing and the section of the gap being free of material other than the flowable potting material.