for Pipelines & Casings Cathodic Protection for Pipelines & Casings
Corrosion Process
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
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.
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
Electrical Isolation From Other Structures is Necessary
Pipeline CP Systems: 1. Cathodic Protection for Simple pipeline
2. Cathodic Protection for pipeline with more components
2. Cathodic Protection for pipeline with more components
2. Cathodic Protection for pipeline with more components
3. Temporary CP system for pipeline by using Sacrificial anodes
Casing CP System
Casing CP System
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
Cathodic Protection Procedure ENGINEERING Site Survey Report Description & Standards Detail Design Design Criteria & Calculations Material Specification Installation Instructions Start up & Commissioning Documentation Maintenance Instructions