Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

01629 CASE STUDY: EXTREME CORROSION OF A 20" OIL PIPELINE IN THE NIGER DELTA REGION

Picture for 01629 CASE STUDY: EXTREME CORROSION OF A 20"
Available for download
Product Number: 51300-01629-SG
ISBN: 01629 2001 CP
Author: Tope Esan, S.D. Kapusta and M.J.J. Simon Thomas
$0.00
$20.00
$20.00
An exploration and production company in Nigeria operates an extensive crude oil trunkline system that connects into an export terminal. One of these pipelines, which extends for 37km, suffered severe internal corrosion soon after being commissioned in 1994. An intelligent pig survey conducted in 1996 revealed a maximum wall loss of approximately 5 mm, equivalent to an average corrosion rate > 4mm/yr. A field campaign was conducted to determine the cause of corrosion, and propose solutions. The main defects were verified with ultrasonics, whereas detailed analyses of the aqueous phase, including on-line measurements were used to investigate the corrosion mechanism. Corrosion was predominantly located at the bottom of the pipeline, at places where the oil/water emulsion breaks down and a continuous water phase can accumulate. Only very small amounts of oxygen were found in the pipeline system and oxygen corrosion was ruled out as the main corrosion mechanism, although oxygen may have played a secondary role through the formation of corrosive species which could stimulate under deposit corrosion. The measured dissolved carbon dioxide content of the water in the pipeline is very low and could not cause significant corrosion in the pipeline. Significant quantities of sulfate reducing bacteria were found in water sampled at all locations. In view of the presence of deposits in the lines, bacterial corrosion is extremely likely to be the main cause of the corrosion in the pipeline. A combination of pigging and a batch biocide treatment has been adopted to control the corrosion.
An exploration and production company in Nigeria operates an extensive crude oil trunkline system that connects into an export terminal. One of these pipelines, which extends for 37km, suffered severe internal corrosion soon after being commissioned in 1994. An intelligent pig survey conducted in 1996 revealed a maximum wall loss of approximately 5 mm, equivalent to an average corrosion rate > 4mm/yr. A field campaign was conducted to determine the cause of corrosion, and propose solutions. The main defects were verified with ultrasonics, whereas detailed analyses of the aqueous phase, including on-line measurements were used to investigate the corrosion mechanism. Corrosion was predominantly located at the bottom of the pipeline, at places where the oil/water emulsion breaks down and a continuous water phase can accumulate. Only very small amounts of oxygen were found in the pipeline system and oxygen corrosion was ruled out as the main corrosion mechanism, although oxygen may have played a secondary role through the formation of corrosive species which could stimulate under deposit corrosion. The measured dissolved carbon dioxide content of the water in the pipeline is very low and could not cause significant corrosion in the pipeline. Significant quantities of sulfate reducing bacteria were found in water sampled at all locations. In view of the presence of deposits in the lines, bacterial corrosion is extremely likely to be the main cause of the corrosion in the pipeline. A combination of pigging and a batch biocide treatment has been adopted to control the corrosion.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for Proposed ECDA Methodology Modification Based on a Case of Study of 110Km Buried Pipeline
Available for download

51315-6022-Proposed External Corrosion DIrect Assessment Methodology Modification Based on a Case of Study of 110Km Buried Pipeline

Product Number: 51315-6022-SG
ISBN: 6022 2015 CP
Author: Homero Castaneda Lopez
Publication Date: 2015
$20.00

This is the final series of steps for the development of external corrosion direct assessment modification set by NACE 502 SP 2008 document.  This work aims to provide the modified methodology based on a case study of a buried pipeline that is 110 km (68.35 miles) in length and 457.2 mm (18in) in diameter.
Picture for 08120 Corrosion of Natural Gas Transmission Line: a Case Study
Available for download

08120 Corrosion of Natural Gas Transmission Line: a Case Study

Product Number: 51300-08120-SG
ISBN: 08120 2008 CP
Author: Mohammed Javeed Shaikh and Khadir Muhideen
Publication Date: 2008
$20.00
Picture for Dealing with Pipelines Positive Potential a Case of Study
Available for download

Dealing with Pipelines Positive Potential a Case of Study

Product Number: 51317--9202-SG
ISBN: 9202 2017 CP
Author: Javier Montanez Villamizar
Publication Date: 2017
$20.00

The pipeline is the Gibraltar-Bucaramanga Gas Pipeline which is divided in two electrically isolated sections by the use of a monolithic joint. The study concluded that it was necessary to complete additional actions to guarantee pipeline integrity, and to assure low corrosion rates.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support