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Corrosion control of buried assets usually involves a double shield: a coating system as a physical insulation barrier, and a cathodic protection system as an additional ad hoc defense. Detection of a corrosion spot at the coating defect stage is the only way to identify the threat before significant metal loss occurs. Furthermore, detection of defects in the coatings of such assets is especially important, since large defects, if left unrepaired, will not only leave the asset locally prone to corrosion, but also drain and weaken the cathodic protection effectiveness for the entire structure. Therefore, identification and characterization of coating anomalies is critical for the integrity of buried assets.
This AMPP standard practice presents guidelines for establishing minimum requirements to ensure proper material selection, application, and inspection of pipeline liquid coatings used for the repair and rehabilitation of previously coated, buried steel pipelines and for coating the external surfaces of field joints on newly constructed, buried steel pipe. This standard addresses the required properties, application recommendations, and quality control testing for field-applied liquid coating using various chemistries on buried steel pipelines. Examples of currently used chemistries for field-applied liquid coatings include epoxies, polyurethanes, and vinyl esters. This standard is intended for use by corrosion control personnel, design engineers, project managers, suppliers, purchasers, and construction engineers and managers.
This standard practice provides the material characteristics, minimum system performance requirements, application methods, handling, shipping, and installation procedures for tape coatings for the prevention of external corrosion of underground or submerged pipelines. This standard is applicable to both carbon steel (CS) pipe and ductile iron (DI) pipe when the application of a tape coating system is desirable. This standard is intended for use by coating applicators, engineers, and pipeline owners as a guide to specifying application parameters.
The tape coatings covered in this standard are used as the external corrosion protection for new and existing pipes, girth welds, and fittings, and for repair and rehabilitation. The primary function of these tape coating systems is to pre- vent corrosion of the pipeline when used with or without cathodic protection (CP).
DOWNLOADABLE HISTORICAL DOCUMENT-Guidelines for cathodic protection (CP) of reinforcing steel in buried or submerged concrete structures.
This NACE standard presents guidelines for cathodic protection (CP) of reinforcing steel in buried or submerged concrete structures. These guidelines provide corrosion control personnel with information to control corrosion of conventional reinforcing steel in portland cement concrete structures through the application of CP. The guidelines presented in this standard are limited to CP systems for new or existing buried or submerged reinforced concrete elements.