Lane Enterprises | Corrugated Steel Pipe

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All corrugated steel pipes have a metallic and/or non-metallic coating for protection against corrosion and possibly abrasion. There is a wide variety of coatings available to match the pipe to the conditions at the site. These coatings and a brief description of each are as follows.

Zinc-Coated (Galvanized): This has been the standard of the steel pipe industry for over 100 years and is produced with a coating weight (total both sides) of 2 oz./sq.ft. of surface. Specifications: ASTM A929, AASHTO M36 Aluminized Steel Type 2: A pure aluminum coating (no more than 0.35% silicon) is applied to the base steel, in lieu of galvanizing. It is produced with a coating weight (total both sides) of 1 oz./sq.ft. of surface. Aluminized Steel Type 2 by AK Steel Specifications: ASTM A929, AASHTO M274 Bituminous Coatings & Linings: Type A: A bituminous asphalt coating is applied to the interior and exterior surfaces of the pipe with a minimum thickness of 0.05 in. Type B/C: Bituminous material is used to fill the corrugations and provide a minimum thickness of 1/8 in. above the crest of the corrugations. This paving is applied to 25% of a round pipe and 40% of the circumference of a pipe-arch. The pipe can be either coated on just the bottom half (Type B) or fully coated (Type C) Type D: Using bituminous material, the corrugations around the full circumference of the pipe are filled to a minimum thickness of 1/8 in. above the crest of the corrugations. This provides a smooth interior surface. Specifications: ASTM A849, AASHTO M190		Polymer Coated: A 10 mil polymer film is laminated over the galvanized coating on each surface. Specifications: ASTM A742, AASHTO M246 Concrete Paved Invert: A 3 in. thick concrete layer is placed to cover 25% of the bottom of a round pipe and 40% of the circumference of a pipe-arch. The paving is placed in the pipe after it is installed. Specifications: ASTM A979