13PIPELINES IN TERNA TIONAL DIGEST | DECEMBER 2 010 TECHNICAL Introduction The process of assessing the integrity of pipelines involves carrying out a detailed study in which the safe remaining life of a pipeline is determined and an integrity- management plan is produced. The focus of such an assessment is on a metal-loss inspection of the pipeline using intelligent in-line inspection (ILI) tools. The inspection findings are combined with a review of corrosion management activiti es in order to diagnose the likely causes of corrosion, or other damage, and identify appropriate preventati ve measures to minimise further deterioration of the pipeline. Based on determined corrosion growth rates, predictions of future repairs together with mitigation and re-inspection requirements can be determined. From this, pipeline operators are able to produce an optimised inspection, maintenance, and repair strategy in order to ensure the integrity of their assets and extend their safe working life while improving pipeline safety and reliability. This article demonstrates the important role of in-line inspection data within the following key stages of an integrity management strategy: • Corrosion assessment; • Corrosion growth assessment; and, • Remnant- life assessment and corrosion management strategy. The following sections describe the practical application of each of these activities using the case study of a pipeline section operated by Jadranski Naftovod Plc, Joint Stock Co ( JANAF Plc) in Croatia. Background to the case study JANAF Plc, based in Croatia, manages an international crude oil transportation system, designed and built in the period from 1974 to 1979, from the port and terminal of Omišalj on the island of Krk, Croatia, supplying both local and foreign refineries in Eastern and Central Europe (Figure 1). MACAW Engineering and Rosen have worked with JANAF in developin g its pipeline integrity management strategy for several pipelines within its system. MACAW has produced integrity assessments of these pipelines based on in-line inspections performed by Rosen, and one such example is presented as a case study in this article in order to demonstrate the particular methodologies of pipeline integrity assessment and their application. This article has been developed in collaboration with Rosen and JANAF. The case study for this article concerns the 179 km long, 36 inch diameter section of the pipeline system from the Omišalj terminal to the Sisak terminal. Detailed information was provided by JANAF to enable a thorough assessment to be completed. Development of integrity management strategies for pipelines With the demand for energy from an ageing pipeline infrastructure, there is an increasing need to ensure the integrity of assets and extend their safe remaining life. Gathering sufficient knowledge about the pipeline and knowing how best to analyse the available information has become critical to ensuring the long-term integrity of pipelines. Inspection using in-line intelligent tools provides the clearest picture of the condition of the pipeline. The information gathered from these inspections can then support numerous integrity related activities, including corrosion assessment, corrosion growth assessment, and remnant-life assessment and corrosion-management strategy. This article describes the particular methodologies and demonstrates their application using experience gained with Jadranski Naftovod Plc. By Ivan Cvitanovic, Jadr anski Naftovod (JANAF) Plc, Croatia; Uwe Thuenemann, Rosen Europe BV , Netherlands; and, Cheryl Argent, Chris Lyons, and Andrew Wilde, MACAW Engineering Ltd, UKFigure 1: Overview of JANAF’ s pipeline system. Figu re 2: Corrosion concentratio n at a lo w po int in the elev atio n pr ofile .
7
Embed
Premium Digest December 2010 Development of Integrity Management Strategies for Pipelines
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
7/27/2019 Premium Digest December 2010 Development of Integrity Management Strategies for Pipelines
IntroductionThe process o assessing the integrity o pipelines involves
carrying out a detailed study in which the sae remaining lie o
a pipeline is determined and an integrity-management plan is
produced. The ocus o such an assessment is on a metal-loss
inspection o the pipeline using intelligent in-line inspection
(ILI) tools. The inspection fndings are combined with a review o
corrosion management activities in order to diagnose the likely
causes o corrosion, or other damage, and identiy appropriate
preventative measures to minimise urther deterioration o
the pipeline. Based on determined corrosion growth rates,
predictions o uture repairs together with mitigation andre-inspection requirements can be determined. From this,
pipeline operators are able to produce an optimised inspection,
maintenance, and repair strategy in order to ensure the integrity
o their assets and extend their sae working lie while improving
pipeline saety and reliability.
This article demonstrates the important role o in-line
inspection data within the ollowing key stages o an integrity
management strategy:
• Corrosion assessment;
• Corrosion growth assessment; and,
• Remnant-lie assessment and corrosion management
strategy.
The ollowing sections describe the practical application o
each o these activities using the case study o a pipeline section
operated by Jadranski Natovod Plc, Joint Stock Co ( JANAF Plc)
in Croatia.
Background to the case studyJANAF Plc, based in Croatia, manages an international crude oil
transportation system, designed and built in the period rom 1974
to 1979, rom the port and terminal o Omišalj on the island o Krk,
Croatia, supplying both local and oreign refneries in Eastern and
Central Europe (Figure 1).
MACAW Engineering and Rosen have worked with JANAF in
developing its pipeline integrity management strategy or severalpipelines within its system. MACAW has produced integrity
assessments o these pipelines based on in-line inspections
perormed by Rosen, and one such example is presented as a
case study in this article in order to demonstrate the particular
methodologies o pipeline integrity assessment and their
application. This article has been developed in collaboration with
Rosen and JANAF.
The case study or this article concerns the 179 km long, 36 inch
diameter section o the pipeline system rom the Omišalj terminal
to the Sisak terminal. Detailed inormation was provided by
JANAF to enable a thorough assessment to be completed.
Development of integritymanagement strategies for pipelines
With the demand or energy rom an ageing pipeline inrastructure, there is an increasing need to ensure the integrity o assets and extend their sae remaining lie. Gathering sufcient knowledge about the pipeline and knowing how best toanalyse the available inormation has become critical to ensuring the long-term integrity o pipelines. Inspection using in-line intelligent tools provides the clearest picture o the condition o the pipeline. The inormation gathered rom theseinspections can then support numerous integrity related activities, including corrosion assessment, corrosion growthassessment, and remnant-lie assessment and corrosion-management strategy. This article describes the particularmethodologies and demonstrates their application using experience gained with Jadranski Natovod Plc.
By Ivan Cvitanovic, Jadranski Naftovod (JANAF) Plc, Croatia;Uwe Thuenemann, Rosen Europe BV, Netherlands; and,
Cheryl Argent, Chris Lyons, and Andrew Wilde, MACAW Engineering Ltd, UK
Figure 1: Overview of JANAF’s pipeline system. Figure 2: Corrosion concentration at a low point in the elevation prole.
7/27/2019 Premium Digest December 2010 Development of Integrity Management Strategies for Pipelines