scope:

Foreword

The purpose of this standard recommended practice is to present the procedures and practices used in providing galvanic anode cathodic protection (CP) to the normally submerged steel surfaces inside water storage tanks. This standard provides owners, engineers, and contractors with specific guidelines for the design and installation of these CP systems; methods for determining the effectiveness of these systems; and recommendations for the operation and maintenance of these systems. This standard is applicable to water storage tanks of various sizes used in municipal water supply and fire protection, including elevated tanks and flat-bottom tanks at ground level. Although the general principles outlined in this standard are applicable to all such tanks, the galvanic anode CP system described in this standard may not be practical for relatively large tanks.

This standard was originally prepared in 1996 by NACE Task Group (TG) T-7L-1, a component of Unit Committee T-7L on Cathodic Protection. It was revised in 2004 by TG 284 on Cathodic Protection, Galvanic Anode for Internal Submerged Surfaces of Steel Water Storage Tanks - Review of NACE Standard RP0196, "Galvanic Anode Cathodic Protection of Internal Submerged Surfaces of Steel Water Storage Tanks." TG 284 is administered by Specific Technology Group (STG) 05 on Cathodic/Anodic Protection. It is sponsored by STG 11 on Water Treatment and STG 35 on Pipelines, Tanks, and Well Casings. This standard is issued by NACE under the auspices of STG 05.