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for Pipelines & Casings

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Presentation on theme: "for Pipelines & Casings"— Presentation transcript:

1 for Pipelines & Casings
Cathodic Protection for Pipelines & Casings

2 Corrosion Process

3 Corrosion Can be Defind as Either:
•Practical: Tendency of a Metal to Revert into it‘s Native State • Scientific: Electrochemical Degradation of Metal as a Result of a Chemical Reaction with its Environment


5 Cathodic Protection Cathodic protection (CP) is a technique to control the corrosion of a metal surface by making it work as a cathode of an electrochemical cell. Cathodic protection systems are most commonly used to protect Steel, water or fuel Pipelines and Storage tanks, steel pier Piles, Ships, Offshore Oil Platforms and onshore Oil & Gas Well casings.

6 Major Components of a Cathodic Protection system
Transformer Rectifier Alternative DC Power Surces Impressed Current Anodes Sacrificial Anodes Permanent Test Stations Permanent Reference Electrodes Enclosures/Cabinets/Boxes Cables Cable Connection Accessories Measuring Equipments

7 Electrical Isolation From Other Structures is Necessary

8 Pipeline CP Systems: 1. Cathodic Protection for Simple pipeline

9 2. Cathodic Protection for pipeline with more components

10 2. Cathodic Protection for pipeline with more components

11 2. Cathodic Protection for pipeline with more components

12 3. Temporary CP system for pipeline by using Sacrificial anodes

13 Casing CP System

14 Casing CP System

15 Cathodic Protection Procedure
MEASUREMENTS Survey of CP Stations Soil Resistivity Measurements Current Density Measurements Calculation of Protective Range Survey of Electrical Power Supply for CP Station

16 Cathodic Protection Procedure
ENGINEERING Site Survey Report Description & Standards Detail Design Design Criteria & Calculations Material Specification Installation Instructions Start up & Commissioning Documentation Maintenance Instructions

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