This is a protective coating applied to corrugated steel pipe by qualified appliers. The pipe is coated on both sides with protective polymer coating that conforms to AST A 742 and AASHTO M-246 and is a minimum of 250 microns thick. The polymer is composed of polyethylene and acrylic acid copolymer – and labelled ‘Trenchcoat protective film’.

The coating bonds to the corrugated steel pipe both chemically and physically, becoming an integral part of the galvanised steel pipe. Extensive industrial tests have shown that it can offer ten times the adhesive peel strength of asphalt coating materials. It’s resistant to corrosion and abrasion. It can also withstand abuse during fabrication, handling and installation, so it offers superior durability without limiting design.

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Corrugated steel pipe that is manufactured with Trenchcoat combines the benefits of steel and plastic:

• Abrasion resistant

  Can withstand sand clay run off and gravel bedload, without losing adhesion to metal. It also possesses superior abrasive resistance over metallic coatings and asphalt dipped coatings.

• Corrosive resistant

  Resists virtually all acids, salts and alkaline commonly found in most storm drains and culvert systems.

• Lightweight

  Coating adds virtually no weight, so pipe can be handled, moved and installed more easily than concrete or asphalt coated pipe

• Weather proof

  The film is not affected by extreme cold or heat found during winter or summer installations.

For aggressive environments Trenchcoat Polymer secondary coating can be used to provide a BBA Certified add on life of 50 years for the following products:

• Storm drains
• Stormwater attenuation tanks
• Culvert systems