Shutdown & Turnaround (TAR) optimisation – the criteria for selecting equipment for Non-Intrusive inspection.

1. Shutdown & Turnaround (TAR) optimisation – the criteria for selecting equipment for Non-Intrusive inspection. Keith Walton Business Development Manager, LifeTech Engineering

2. Speakers Profile Years of Experience: 30 Educational Background: BA (Hons) Business Studies MSc Computing Science Brief Job Profile: Business Development Manager, LifeTech Engineering. Providing Asset Integrity Management software for RBI, NII, FFS and Asset Life Extension, associated support services and training. Professional Expertise: 30 years business experience (general management, operations management and business development) across several industry sectors, the last 20 years involved with the Aberdeen Oil & Gas industry in a number of AIM related roles. Speakers Photograph Keith Walton LifeTech Engineering

3. Speakers Profile Years of Experience: 12+ Educational Background: PhD Mechanical Engineering Brief Job Profile: Senior Integrity Engineer, LifeTech Engineering. RBI project management, Corrosion management supervision, and AIM consultancy for projects world wide. • Professional Expertise: Over 12 years experience in the Oil & Gas industry, specialising in Asset Integrity Management. Full proficiency in RBI software and related codes and references. Speakers Photograph Dr. Mehdi Eskandarzade LifeTech Engineering

4. LifeTech Engineering Shutdown & Turnaround (TAR) optimisation – the criteria for selecting equipment for Non-Intrusive inspection. A review of the advantages of Risk-Based Inspection (RBI) when considering equipment for inspection and the benefits of Non-Intrusive Inspection (NII) as an alternative to Internal Visual Inspection (IVI); concentrating on pressure equipment.

5. LifeTech Engineering About LifeTech Engineering LifeTech Engineering Ltd is a leading oil and gas Asset Integrity Management (AIM) consultancy, operating out of Aberdeen, UK. We provide specialist software, engineering services and training throughout the entire asset lifecycle to manage risk, reduce costs and improve Plant safety, efficiency, and productivity. • We have established AIM, implemented RBI and carried out Life Extension studies Upstream, Midstream and Downstream. • We have developed innovative software: • RBLX for RBI, including a Non-Intrusive Inspection (NII) module • FITest for Fitness for Service Assessment • FUSION for Life Extension Assessment

6. LifeTech Engineering • Turnaround (TAR): a precisely planned break in production during which elements of a production/process facility are taken offline for inspection and remedial works. • Expensive - cost of carrying out the turnaround activities & revenue lost through stoppage of production. • Shutdown: unplanned break in production – same effect. • Traditional approach to inspection: Time-Based or Condition-Based • TBI: inspect equipment on a rigid time schedule, however this is costly if a lot of assets involved. • CBI: inspect based on knowledge of condition of equipment and perceived trends in condition. A reactive approach. • RBI has benefits over TBI & CBI. CONDITION BASED INSPECTION Trend analysis, consequences not considered. REACTIVE RISK BASED INSPECTION Risk Analysis, Probability & Consequence PROACTIVE TIME BASED INSPECTION Everything inspected at the same interval COSTLY

7. LifeTech Engineering Structure of the proposed procedure

8. LifeTech Engineering Risk-Based Inspection (RBI) In RBI, risk is calculated as the product of the probability of failure and the consequence associated with a failure: Risk = Probability of Failure (PoF) x Consequence of Failure (PoF) Risk is regarded as a better measure for prioritisation than either the PoF or CoF alone, because it is more descriptive of the actual damage/loss caused.

9. LifeTech Engineering

10. LifeTech Engineering What do we expect from RBI?

11. LifeTech Engineering High level decision guidance chart for deciding whether NII can be used. Source: HOIS RP 103 HOIS Recommended practice for non-intrusive inspection of pressure vessels. Issue: 2020

12. LifeTech Engineering Selection Criteria • Confidence in the ability to predict the type and location of degradation • How do we ensure confidence? • Previous inspection effectiveness • How do we decide on the effectiveness? • Degradation type, likelihood, predictability, severity and rate • How do we determine these? • Consequence of failure • How do we determine these? • Inspection performance requirements • How do we determine these? HOIS RP 103 - HOIS Recommended practice for non-intrusive inspection of pressure vessels. Issue: 2020 Offers guidance on all the above…

13. LifeTech Engineering Selection Criteria • Confidence in the ability to predict the type and location of degradation • How do we ensure confidence? • Consider the physical location of degradation on the Equipment and the way degradation locations are distributed, e.g. widely distributed or isolated. • Use evidence from previous inspections • Repair history • Process fluid composition and operations • Degradation types and locations • Any changes of the above.

14. LifeTech Engineering Selection Criteria • Previous inspection effectiveness • How do we decide on the effectiveness? • The intent is to compare the effectiveness of the last inspection carried out, relative to that of a conventional internal visual inspection

15. LifeTech Engineering Selection Criteria • Degradation type, likelihood, predictability, severity and rate • How do we determine these? • Generalised loss of wall thickness. This covers corrosion or erosion where loss of wall thickness (LOWT) is uniform or varies slowly within the area under consideration. • Localised loss of wall thickness. This covers corrosion or erosion where the loss of wall is localised or irregular within the area under consideration; includes pitting. • Localised cracking. This covers crack like flaws that are typically isolated and do not merge with surrounding flaws. A fatigue crack initiated in a region of stress concentration would typically be considered as localised cracking. • Generalised cracking. This covers crack like flaws which are numerous and closely spaced in the region under consideration.

16. LifeTech Engineering Selection Criteria • Consequence of failure • How do we determine these? • Health, Safety and Environmental Consequences • High: One or more fatalities or serious injuries requiring hospital treatment, or major release of hazardous material or pollution. • Medium: Injury requiring hospital treatment, or release of hazardous material or pollution but with no significant effect off site. • Low: At most, minor injury with full recovery, or minimal release of hazardous material or pollution. • Business Interruption and Cost Consequences • High: Major shutdown / turnaround or high costs of repair / replacement. • Medium: Several days shutdown / turnaround or significant costs of repair / replacement. • Low: Less than one day shutdown / turnaround or low costs of repair / replacement.

17. LifeTech Engineering Selection Criteria • Inspection performance requirements • How do we determine these? • Validated inspection performance of techniques selected and applied in a large number of successful NII applications where the inspection strategy has been determined in accordance with the principles of HOIS. • Statistical simulation and analysis to assess the effectiveness of inspections depending on the performance parameters. • The performance of available inspection technologies when appropriately implemented in the field.

18. LifeTech Engineering What do we expect from NII assessment?

19. LifeTech Engineering Example: Multipart Drum Zone C: Gas Zone B: oil Zone A: Water

20. LifeTech Engineering Example: Multipart Drum Result of RBI Assessment According to RBI, the risk of the asset is Medium-High and the priority is required for inspection of this drum.

21. LifeTech Engineering Example: Multipart Drum Proposed Inspection Plan based on RBI Assessment RBI can suggest NII, But whether NII is applicable or not is a matter for the Inspection Team to decide. To ensure NII possibility, NII assessment is required.

22. LifeTech Engineering NII assessment in RBLX

23. LifeTech Engineering Result of NII assessment in RBLX

24. LifeTech Engineering Conclusion • RBI experiences showed that only small portion of total assets (about 20%) have high or medium-high risks and require inspections in next turnaround. • NII can help to inspect these high risk or medium-high risk components in reduced turnaround (shutdown) times. • In most cases intrusive internal inspections of the vessels can be replaced with NII methods, but standard assessment is required – follow HOIS guidelines.

25. LifeTech Engineering Thank you LifeTech Engineering Ltd Keith.Walton@Lteng.co.uk Reza.Shahrivar@Lteng.co.uk +44 (0)1224  824112