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RP0286-HD1997-SG Electrical Isolation of Cathodically Protected Pipelines-HD1997

The importance of pipeline electrical isolation in achieving and maintaining adequate, reliable, and economical corrosion control. Types of devices used for isolation; precautions to be observed; and selection of devices…Historical Document 1997

Product Number: 21032-HD1997
ISBN: 1-57590-041-6
Author: NACE International
Publication Date: 1997
$149.00
$149.00
$149.00

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The importance of pipeline electrical isolation in achieving and maintaining adequate, reliable, and economical corrosion control. Types of devices used for isolation; precautions to be observed; and selection of devices…Historical Document 1997

 

1.1 This standard explains the importance of pipeline electrical isolation in achieving and maintaining adequate, reliable, and economical corrosion control. The standard outlines the types of devices used for isolation; precautions to be observed; and selection of devices based on pipeline characteristics, site, and contents. The standard describes isolating flanges, gaskets, sleeves, washers, joints, unions, couplings, and spools, and discusses materials for pipeline casing isolation. Installation, field testing, and maintenance of isolating devices are also included.

This standard describes the application of isolating devices intended only for cathodic protection purposes where voltages across the isolating device are 1 to 2 volts 4 DC and the AC exposure does not exceed 15 volts rms. This standard does not discuss situations in which isolating devices are incorporated purely for safety reasons; in those situations, reference should be made to relevant electrical safety codes. Isolating devices shall not be used in enclosed areas where combustible atmospheres are likely to be present.

1.2 Isolation of cathodically protected pipelines is recommended to minimize current requirements, facilitate testing and troubleshooting, and improve current distribution.

 

This standard recommended practice is to be used in conjunction with the latest revisions of NACE Standards RP0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems"; RP0675, "Control of Corrosion on Offshore Steel Pipelines"; and RP0177, "Mitigation of Alternating Current and Lightning Effects on Metallic Structures and Corrosion Control Systems."

 

Each of these standards refers to electrical isolation or isolation joints, but details are not provided. This standard, which was prepared to supplement those standards, provides engineers, designers, and technical personnel dealing with pipelines the necessary information to electrically isolate cathodically protected pipelines.

This standard was originally prepared in 1986 by NACE International Task Group T-10A-15 on Electrical Isolation of Cathodically Protected Pipelines, a component of Unit Committee T-10A on Cathodic Protection, and was issued by NACE under the auspices of Group Committee T-10 on Underground Corrosion Control. The standard was revised in 1997, the current issue.

 

Historical Document 1997

The importance of pipeline electrical isolation in achieving and maintaining adequate, reliable, and economical corrosion control. Types of devices used for isolation; precautions to be observed; and selection of devices…Historical Document 1997

 

1.1 This standard explains the importance of pipeline electrical isolation in achieving and maintaining adequate, reliable, and economical corrosion control. The standard outlines the types of devices used for isolation; precautions to be observed; and selection of devices based on pipeline characteristics, site, and contents. The standard describes isolating flanges, gaskets, sleeves, washers, joints, unions, couplings, and spools, and discusses materials for pipeline casing isolation. Installation, field testing, and maintenance of isolating devices are also included.

This standard describes the application of isolating devices intended only for cathodic protection purposes where voltages across the isolating device are 1 to 2 volts 4 DC and the AC exposure does not exceed 15 volts rms. This standard does not discuss situations in which isolating devices are incorporated purely for safety reasons; in those situations, reference should be made to relevant electrical safety codes. Isolating devices shall not be used in enclosed areas where combustible atmospheres are likely to be present.

1.2 Isolation of cathodically protected pipelines is recommended to minimize current requirements, facilitate testing and troubleshooting, and improve current distribution.

 

This standard recommended practice is to be used in conjunction with the latest revisions of NACE Standards RP0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems"; RP0675, "Control of Corrosion on Offshore Steel Pipelines"; and RP0177, "Mitigation of Alternating Current and Lightning Effects on Metallic Structures and Corrosion Control Systems."

 

Each of these standards refers to electrical isolation or isolation joints, but details are not provided. This standard, which was prepared to supplement those standards, provides engineers, designers, and technical personnel dealing with pipelines the necessary information to electrically isolate cathodically protected pipelines.

This standard was originally prepared in 1986 by NACE International Task Group T-10A-15 on Electrical Isolation of Cathodically Protected Pipelines, a component of Unit Committee T-10A on Cathodic Protection, and was issued by NACE under the auspices of Group Committee T-10 on Underground Corrosion Control. The standard was revised in 1997, the current issue.

 

Historical Document 1997

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