Save 20% on select titles with code HIDDEN24 - Shop The Sale Now
Recent close-interval potential surveys have raised concerns about the accuracy of potential measurements on older, poorly-coated pipelines. Two sources of error were identified: metallic IR-drops and equalization currents.
We are unable to complete this action. Please try again at a later time.
If this error continues to occur, please contact AMPP Customer Support for assistance.
Error Message:
Please login to use Standards Credits*
* AMPP Members receive Standards Credits in order to redeem eligible Standards and Reports in the Store
You are not a Member.
AMPP Members enjoy many benefits, including Standards Credits which can be used to redeem eligible Standards and Reports in the Store.
You can visit the Membership Page to learn about the benefits of membership.
You have previously purchased this item.
Go to Downloadable Products in your AMPP Store profile to find this item.
You do not have sufficient Standards Credits to claim this item.
Click on 'ADD TO CART' to purchase this item.
Your Standards Credit(s)
1
Remaining Credits
0
Please review your transaction.
Click on 'REDEEM' to use your Standards Credits to claim this item.
You have successfully redeemed:
Go to Downloadable Products in your AMPP Store Profile to find and download this item.
It was proposed to apply a modified external corrosion direct assessment process to a small station. This paper describes the technical approach which was developed in order to overcome the expected challenges.
Pipelines have been considered one of the safest methods of transporting energy from one place to another. This is achieved through a systematically planned, documented, and comprehensive pipeline integrity management (PIM) program. PIM covers areas such as engineering, operations, inspections and maintenance, health and safety, and environment protection.
The External Corrosion Direct Assessment (ECDA) is formally listed as an acceptable integrity assessment method within Subpart O, Part 192 of the code of federal regulations regarding gas transmission pipeline integrity management2. It is a 4 step continuous improvement process to identify and address locations where external corrosion activity has occurred, is occurring or may occur1. In the pre-assessment phase, a comprehensive right-of-way inspection is performed, and pipeline operability data is collected to verify the feasibility of conducting a full ECDA for the pipeline under evaluation. In the indirect inspection phase, the status of cathodic protection and pipeline coating is tested using methods such as Close Interval Potential Surveys (CIPS) and Direct Current Voltage Gradient (DCVG) surveys.
The quality of indirect inspection data is critical in an External Corrosion Direct Assessment (ECDA). The need exists to increase the accuracy of the field data collection, to improve the data processing and to effectively present the results. This paper describes several challenges.
Assessment of a 70-year old pipeline is carried out. This paper discusses the assessment challenges, inspection findings and recommendations given to keep this old offshore/onshore unpigable giant in service.
This paper summarizes the results of ten years of External Corrosion Direct Assessment (ECDA) application on more than 100 projects and includes a number of important lessons learned during the process.
The annual natural gas demand in the United States surpassed 31 trillion cubic feet in 2019. This is over a 500% increase from demand in the 1950’s (5.7 trillion cubic feet) [1]. As gas demand continues to rise, pipeline operators have limited options to meet demand requirements. Pressure uprating is one option that can be leveraged for certain pipelines to meet the increased demand economically.
NACE external corrosion direct assessment (ECDA) process — assessing and reducing the impact of external corrosion on pipeline integrity.