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51312-01268-LIQUID PETROLEUM - INTERNAL CORROSION DIRECT ASSESSMENT (LP-ICDA) OF A “PIGGABLE” KUWAITI CRUDE OIL

Product Number: 51312-01268-SG
ISBN: 01268 2012 CP
Author: Patrick J. Teevens
Publication Date: 2012
$0.00
$20.00
$20.00
The paper describes an Internal Corrosion Direct Assessment (ICDA) protocol carried out for a “piggable” crude oil pipeline for Kuwait Oil Company (KOC) in compliance with NACE International Standard Practice SP0208-2008. A 36” pipeline (CR088) transports Ratawi/Burgan crude oil from MF/TB-1 to NTF over a distance of 25 kilometers. It consists of three pipeline regions as defined within SP0208-2008 (with two of the three pipeline regions containing three pipeline subregions) where the three regions were operated with a different flow rate and/or pipeline diameter and BS&W amount under two discrete time eras. The pipeline was commissioned in 2005 and had been inspected in 2009 using UT-ILI tools. During the indirect inspection phase of ICDA several internal corrosion locations were predicted (and subsequently confirmed during the Direct Examination phase or step) which may be attributable to CO2 partial pressure H2S content crude flow rate operating temperature inorganic halides deposited solids bacteria and aerated conditions. To identify the root causes for the presence of the internal corrosion threat and remedial measures required to mitigate problems going forward Allied Engineers and Broadsword’s in-house internal corrosion prediction model enpICDATM was utilized by KOC. This paper reviews the process undertaken to identify areas of water and solids accumulation most likely to have contributed to corrosion as well as identifying those areas where corrosion was less likely to have occurred. Additionally a comparison to predicted corrosion rates with those collected earlier from the UT smart pig run are discussed. Although this new piggable pipeline has already been inspected by UT pigging assessment of ICDA-LP for this crude line has provided KOC with a practical internal corrosion mitigation plan to further reduce and control the risk for future internal corrosion. Key words: Liquid petroleum pipeline Internal Corrosion Direct Assessment (LP-ICDA) Indirect Inspection (IDI) Ultrasonic In-Line Inspection Mitigation and operation strategies
The paper describes an Internal Corrosion Direct Assessment (ICDA) protocol carried out for a “piggable” crude oil pipeline for Kuwait Oil Company (KOC) in compliance with NACE International Standard Practice SP0208-2008. A 36” pipeline (CR088) transports Ratawi/Burgan crude oil from MF/TB-1 to NTF over a distance of 25 kilometers. It consists of three pipeline regions as defined within SP0208-2008 (with two of the three pipeline regions containing three pipeline subregions) where the three regions were operated with a different flow rate and/or pipeline diameter and BS&W amount under two discrete time eras. The pipeline was commissioned in 2005 and had been inspected in 2009 using UT-ILI tools. During the indirect inspection phase of ICDA several internal corrosion locations were predicted (and subsequently confirmed during the Direct Examination phase or step) which may be attributable to CO2 partial pressure H2S content crude flow rate operating temperature inorganic halides deposited solids bacteria and aerated conditions. To identify the root causes for the presence of the internal corrosion threat and remedial measures required to mitigate problems going forward Allied Engineers and Broadsword’s in-house internal corrosion prediction model enpICDATM was utilized by KOC. This paper reviews the process undertaken to identify areas of water and solids accumulation most likely to have contributed to corrosion as well as identifying those areas where corrosion was less likely to have occurred. Additionally a comparison to predicted corrosion rates with those collected earlier from the UT smart pig run are discussed. Although this new piggable pipeline has already been inspected by UT pigging assessment of ICDA-LP for this crude line has provided KOC with a practical internal corrosion mitigation plan to further reduce and control the risk for future internal corrosion. Key words: Liquid petroleum pipeline Internal Corrosion Direct Assessment (LP-ICDA) Indirect Inspection (IDI) Ultrasonic In-Line Inspection Mitigation and operation strategies
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