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Offshore Reliability Data Handbook 5th Edition (OREDA 2009) |
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The 2009 Handbook edition is split in two separate volumes:
Volume 1 - Topside Equipment
Volume 2 - Subsea Equipment
The handbook presents high quality reliability data collected during phase VI and VII (project period 2000 - 2003) of the OREDA project.
The intention of the handbook is to provide both quantitative and qualitative information as a basis for RAMS (reliability, availability, maintainability and safety) analyses.
The OREDA handbook is prepared by SINTEF Technology and Society on the behalf of the OREDA project.
You may order the book(s) from Det Norske Veritas (DNV):
http://www.dnv.com/resources/handbooks/ |
OREDA Handbook - A unique data source
The 5th edition of the OREDA handbook will give you a unique data source on failure rates, failure mode distribution and repair times for equipment used in the petroleum, petrochemical and natural gas industries. The data can also be used for other applications via a quantification process. Such data are necessary for reliability as well as risk analysis. The reliability, availability, maintenance and safety (RAMS) are of considerable concern to employees, companies and authorities. RAMS analyses are carried out to provide a basis for decisions in engineering, fabrication and operations. It is imperative for the confidence in such analyses to use a high quality source of reliability and maintenance data.
Typical applications are:
- Reliability, Availability, Maintainability (RAM) analyses
- Regularity studies
- Risk analyses
- Planning and scheduling of maintenance, inspection and testing
- Cost benefits studies
- Selection of alternative system designs
Particulars of the 2009 edition
As decided by OREDA project Steering Committee, the current 2009 edition has been split in two volumes, one for topside equipment (Volume 1) and one for subsea equipment (Volume 2) which can be bought separately. The 2009 topside and subsea volumes are both divided in two parts. Part I describes the OREDA project, different data collection phases and the estimation procedures used to generate the data tables presented in Part II of the handbook.
As focus in OREDA has been on collecting subsea data in the phases from which data in these books originate, less topside data have been collected than in past OREDA phases. To obtain a reasonable population for presenting reliability data for topside equipment in the 2009 edition, some data issued in the previous 2002 handbook (4th edition) have also been included. The 2002 edition included data collected during OREDA phase IV and V (1993–1999).
Compared to the 2002 edition, there are some minor changes in the reliability data presentation. For the subsea volume, however, data is presented at more detailed taxonomy and application levels than the 2002 issue. The main changes are:
Topside equipment:
- Active repair time and restoration man-hours are both given with their mean and maximum values
Subsea equipment:
- Failures modes and corresponding failure rates are given for each subunit / component and each severity class both for the whole equipment unit and equipment unit subdivided in relation to application
- Failure mechanisms (previously termed Failure Descriptor) are given for each failure mode. The number of these failures categorised as Critical and Degraded, plus totals, are summarised separately
The equipment categories and population contained in the 2009 issue is shown in the table below. The data derives mainly from the offshore industry but do also contain some data from onshore exploration & production (E & P) facilities.
Table 1 - Equipment Population in the Topside Handbook (Volume 1)
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SYSTEM |
EQUIPMENT CLASS |
Data from 2002 edition included in 2009 edition
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New data in 2009 edition |
Total data in the 2009 edition |
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Phase IV |
Phase V |
Phases VI + VII |
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No. of units |
No. of units |
No. of units |
No. of units |
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1. Machinery |
1.1 Compressors |
75 |
56 |
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131 |
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1.2 Gas Turbines |
56 |
32 |
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88 |
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1.3 Pumps |
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160 |
52 |
212 |
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1.4 Combustion Engines |
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75 |
23 |
98 |
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1.5 Turboexpanders |
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8 |
2 |
10 |
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2. Electric
Equipment |
2.1 Electric Generators |
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26 |
6 |
32 |
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2.2 Electric Motors |
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128 |
15 |
143 |
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3. Mechanical
Equipment |
3.1 Heat Exchangers |
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17 |
4 |
21 |
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3.2 Vessels |
148 |
50 |
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198 |
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3.3 Heaters and Boilers |
11 |
1 |
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12 |
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4. Other
Topside
Equipment |
4.1 Fire & Gas Detectors |
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779 |
139 |
918 |
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4.2 Process Sensors |
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69 |
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69 |
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4.3 Control Logic Units |
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10 |
10 |
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4.4 – 4.5 Valves |
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331 |
576 |
907 |
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SUM TOPSIDE |
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290 |
1732 |
827 |
2849 |
Table 2 - Equipment Population in the Subsea Handbook (Volume 2)
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5. Subsea |
5.1 Control Systems |
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17 |
105 |
122 |
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5.2 Flowlines |
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59 |
251 |
310 |
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5.3 Manifolds |
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29 |
77 |
106 |
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5.4 Pipelines (SSIV) |
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85 |
4 |
89 |
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5.5 Risers |
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42 |
104 |
146 |
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5.6 Running Tools |
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5 |
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5 |
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5.7 Templates |
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15 |
15 |
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5.8 Wellheads & X-mas Trees |
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83 |
179 |
262 |
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SUM SUBSEA |
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320 |
735 |
1055 |
Handbook Data Tables
Following shows the format of the main data tables in the handbook:
Table 3 -Topside main Data Table
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Taxonomy no |
Item |
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Population |
Installations |
Aggregated time in service (106 hours) |
No of demands |
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Calendar time *
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Operational time †
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Failure mode |
No of |
Failure rate (per 106 hours). |
Active rep. hrs |
Manhours |
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failures |
Lower |
Mean |
Upper |
SD |
n / τ |
Mean |
Max |
Mean |
Max |
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All modes |
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Comments
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Table 4 - Subsea main Data Table
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Taxonomy no |
Item
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Population |
Installations |
Calendar time (106 hours) |
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Severity class / Failure mode |
No of units |
No of failures |
Failure rate (per 106 hours) |
Active rep. time (hrs) |
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Lower |
Mean |
Upper |
SD |
n / τ |
Mean |
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SUBUNIT NO 1 |
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Severity class |
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Failure modes |
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Component no 1.1 |
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Severity class |
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Failure modes |
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Component no 1.p |
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Severity class |
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Failure modes |
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SUBUNIT NO ’n’ |
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Severity class |
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Failure modes |
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Component no m.1 |
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Severity class |
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Failure modes |
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Component no m.p |
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Severity class |
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Failure modes |
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TOTAL – EQUIPMENT UNIT |
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Severity class |
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Failure modes |
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Comments
For components with no failures, n is set to 0.5 corresponding to a non-informative prior. |
Some definitions:
- The failure rate (Lower, Mean, Upper) is calculated by the tailor made OREDA estimator described in the Handbook
- SD = Standard deviation
- n / τ = The total number of failures divided by the total time in service, i.e. the failure rate estimate we would use for a homogeneous sample
OREDA Database
The source data for this book are stored in a computer database. The OREDA® database and the associated software are available only to the oil companies participating in the OREDA project. The data presented in this handbook are extracted and compiled from this database and presented as generic data tables. The database does, however, contain information on a more detailed level than what is covered in this handbook.
Offshore topside and subsea equipment are primarily covered, but some onshore exploration & production (E&P) equipment is also included. Data collection is currently being extended for this part of the industry.
Topside data are in general not covering the whole lifetime of equipment, but typically a time window of 2 – 4 years of operation. Infant mortality failures are as a rule not collected for topside equipment; hence, the data collected are from the normal steady-state operating time period. Subsea data are, however, normally collected on a whole lifetime basis.
OREDA Project
The Offshore Reliability Data (OREDA) project was established in 1981 in co-operation with the Petroleum Safety Authority of Norway. The initial objective of OREDA was to collect reliability data for safety equipment. The current organisation, as a co-operating group of several oil companies, was established in 1983, and at the same time the scope of OREDA was extended to cover reliability data from a wide range of equipment used in the oil and gas industry, mainly from offshore installations.
The main objective of the OREDA project is to contribute to an improved safety and cost effectiveness in design and operation of the oil and gas industry; through collection and analysis of maintenance and operational data, establishment of a high quality reliability database, and exchange of reliability, availability, maintenance and safety (RAMS) technology among the participating companies.
The OREDA Participants in 2009 are:
- BP Exploration Operating Company Ltd.
- ConocoPhillips Skandinavia AS
- Eni S.p.A. Exploration & Production Division
- ExxonMobil Production Company
- Gassco (associated member)
- Shell Global Solutions UK
- Statoil ASA
- Total S.A.
For those who want to get more information on the OREDA database and the OREDA project in general, the OREDA Steering Committee Chairman or OREDA Project Manager needs to be contacted (see www.oreda.com).
We also welcome technical comments or questions to the book that can be directed to:
