Reaffirmed 2023

1. SCOPE

This standard deals with the general principles and requirements of cathodic protection system for prevention against corrosion of external underground buried surface of metallic high pressure hydrocarbon product pipeline/structure.

This standard is intended to serve as a guide for establishing minimum requirements for control of external corrosion on pipeline/structure system. Corrosion control by a coating supplemented with cathodic protection should be provided in the design and maintained during service life of pipeline/structure system. Consideration should be given to the construction of pipeline/structure in a manner that facilitates the use of in-line inspection tools.

2. REFERENCES

The following standards contain provisions which through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: Standard

ASTMG97: 1997 Standard test method for laboratory evaluation of magnesium sacrificialanode test specimens for underground applications

IS 10221 : 1982 Code of practice for coating and wrapping of underground mild steel pipeline/structure

IS 15569 Petroleum and natural gas industries - External coatings for buried or submerged pipelines used in pipeline transportation of gas and liquid hydrocarbons:

(Part 1) : 2006 Polyolefin coatings (3-layer pe and 3-layer pp)

(Part 2) : 2006 Fusion bonded epoxy coatings