An External Corrosion Direct Assessment Module For A Pipeline Integrity Management System
Proceedings of IPC20066th International Pipeline Conference
September 25-29, 2006, Calgary, Alberta, Canada
ABSTRACT:
A significant part of the high pressure gas transport system of Gasunie cannot be examined by in-line inspection techniques. To ensure safe operation of these pipelines, an External Corrosion Direct Assessment (ECDA) module for PiMSlider® (a pipeline integrity management system) is currently under development. The functional specifications of this module are based on NACE RP0502-2002, a recommended practice for ECDA. In addition to this, a new probabilistic methodology has been adopted, to take account for uncertainties associated with ECDA and to quantify the contributions from aboveground surveys and excavations to the integrity of a pipeline. This methodology, which is based on Structural Reliability Analysis (SRA) and Bayesian updating techniques, is presented in more detail in paper IPC2006-10092 of this conference.
The DA module of PIMSLIDER enables computerized storage, retrieval and processing of all appropriate pipeline data and therefore guarantees highly accurate, reproducible and time saving integrity analyses of the Gasunie grid. Another important function of this system is the ability to use the complete database of all pipelines to pre-assess the integrity of a particular pipeline. This automated retrieval of data from pipelines with similar characteristics and/or environmental conditions results in a substantial increase of accessible data and enables Gasunie to improve the reliability of applied statistics throughout the process. As a consequence, the overall cost of inspections and excavations can be greatly reduced.
In the Pre-Assessment phase, the DA module assists the integrity manager in gathering and analyzing data necessary to determine the current condition of a pipeline. After collection and visualization of the available data, the user can identify suitable ECDA regions. Furthermore, the gathered data are used to construct prior distributions of parameters relevant to the SRA model, such as the number and size of corrosion defects and pipeline-related parameters. In the Indirect Inspections step, the DA module allows the user to store and analyze the data from aboveground surveys, in order to identify and define the severity of coating faults and areas at which corrosion activity may occur. The probabilistic methodology accounts for the individual performance of each applied survey technique in terms of missed defects and false indications, in general a major source of uncertainty in ECDA. In the Direct Examinations phase, excavations are carried out to collect data to assess possible corrosion activity. Subsequently, the ECDA module uses this information to update, among other things, the parameters concerning the performance of survey techniques, the number of defects and the corrosion rate. As a result, updated failure frequencies are calculated for each ECDA- region (after each excavation if required), which are then used by the DA module to advise the integrity manager if additional mitigating activities are necessary, or by defining a reassessment interval.
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PIMS Implementation Program for Sasol's Gas Operations
Rob BosNV Nederlandse Gasunie
Netherlands
ABSTRACT:
This paper presents a summary of the activities and major deliverables of the Pipeline Integrity Management System (PIMS) set up for Sasol's gas pipeline operations in South Africa in 2003-2004. The project was carried out by an international group of experts which included Sasol Gas, Gasunie Engineering & Technology, and ATP-Neftegazsystema (of the UK and Belarus). The main objective of the project was the implementation of the system for the 26-in. diameter, 540-mile long Mozambique-Secunda pipeline in order to meet the requirements of B31.8S 2001. Sasol Gas started the project in June 2003, with a request for quotation. Final delivery of the B3.8S management system and PIMS software took place in September, 2004. A subsequent program for the implementation of PIMSlider for Sasol Gas' complete network is planned in 2005-2007.
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PIMSlider® - Pipeline Integrity Management System
Igor MakhkinJSC Neftegazsystema
Belarus
ABSTRACT:
This paper presents the general PIMS principles based on system PIMSlider® as example. System structure is presented as well as list of major applications and implementation references.
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The Implementation Of An Integral Pipeline (Integrity) Management System Means More Than One Integrity Alone
Format 1Ad Pijnacker Hordick/Rein Kornalijnslijper
Gastransport Services
Groningen
The Netherlands
ABSTRACT:
This paper will give an overview of the history of PiMS and the new developments within Gastransport Services regarding the implementation of an integral Pipeline (integrity) Management System and especially and also in more detail the implementation, testing and verifying of a Risk Assessment tool. As an obvious part of PiMS. The design of the pipeline network in the Netherlands was based on the ASME B31G guidelines, as a sound engineering practice. The construction started early 1960 in a very rapid tempo. The control and maintenance in those years was executed on a paper based system with steady state frequencies of measurements uniformly distributed all over the network.
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The Implementation Of An Integral Pipeline (Integrity) Management System Means More Than One Integrity Alone
Format 2Ad Pijnacker Hordick/Rein Kornalijnslijper
Gastransport Services
Groningen
The Netherlands
ABSTRACT:
Nowadays, with databases and computer systems, all kind of analyses beyond the capacity of a pipeline engineer can be carried out. These analyses have been made possible by outstanding Research of different companies, Joint Industry Programs and international investigations executed by a variety of different well known groups. At that time however an integration of all the data and stand-alone models into one single (PiMS-)system with one or more linked databases and controlled by one process control system was not a major option due to a lack of IT-possibilities and management objectives.
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The Risk Assessment Module PSL As An Obvious Part of An Integral Pipeline (Integrity) Management System
Ad Pijnacker Hordick/Rein Kornalijnslijper/Jeroen Zanting/Robert KuikGastransport Services
The Netherlands
ABSTRACT:
Proceedings of IPC 2004 International Pipeline Conference, October 4-8, 2004, Calgary, Alberta, Canada. Due to very fast developments in IT, recent incidents in the industry all over the world, the change in management objectives to have a faster and a better control over the pipeline safety, reliability and associating costs a strong desire for a PiMS-process control system was born.
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The Implementation Of An Integral Pipeline (Integrity) Management System
PosterAssociated Technology Pipeline Limited
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