General

This standard practice presents guidelines for establishing the minimum requirements to ensure the proper selection, application, and performance of bonded tape coatings. These coatings are used as the external corrosion protection for new and existing pipe, girth welds, and fittings, and for repair and rehabilitation. The primary function of these tape coating systems is to prevent corrosion of the pipeline when used with or without cathodic protection (CP). This standard provides guidelines for the proper pipeline surface preparation, tape coating system application, inspection, and tape coating damage repair to ensure long-term performance.

Bonded tape coatings can be applied in, over, or beside a pipeline trench, whether the pipeline is in service, out of service, or segmented. If an extended period of aboveground storage of coated pipe is anticipated, consideration should be given to the ability of the coating to resist degradation by ultraviolet (UV) light and other atmospheric and environmental conditions. Because aboveground and environmental conditions for storage sites vary, the manufacturer should be consulted regarding the correct type of wrap or procedure recommended for the specific anticipated storage conditions and method for UV protection.

These tape coatings may also be applied in a fabrication shop or coating plant. The manufacturer should be consulted regarding the correct type of application equipment and procedures.

The purchaser shall assess construction and soil conditions that could lead to mechanical damage (e.g., abrasion, impact, soil stress) to the coating. The tape manufacturer should be consulted for the recommendations of tape systems suitable for the construction or in-ground conditions. The tape manufacturer should recommend appropriate products and procedures for ensuring the required in-service performance. Recommendations may include either specific products or precautionary measures, e.g., special backfills, rockshield, or other damage prevention techniques. This depends on the conditions encountered.

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