Aberdeen Branch

Aberdeen Branch

The branch was very fortunate to have some excellent speakers for its winter meetings at Robert Gordon University (RGU) which attracted good audiences.

Dr Ed Whyte, principal corrosion engineer, and Paul McCarthy, of Plant Integrity Management (PIM) commenced the Q1 2019 programme with some great insights into the concepts of Maximising Economic Recovery (MER). Ed’s role has encompassed the provision of corrosion and integrity engineering services to PIM’s clients, while Paul is currently involved in various maintenance and inspection optimisation projects for a range of North Sea Operators.

They discussed the historic barriers to MER and how a step change from 60-74% production efficiency has recently been achieved, highlighting that only a 1% increase in efficiency, can dramatically produce an extra 12 million barrels per year in the North Sea, as 2016 figures have demonstrated.

Dr Ed Whyte of Plant Integrity Management (PIM) discusses managing integrity issues v. MER.

Dr Ed Whyte of Plant Integrity Management (PIM) discusses managing integrity issues v. MER.

The initial UKCS Review (2013), the final Wood Report (2014) and new OGA (2015) UK MER Legislation (2018), have all recognised the importance of reducing UK plant 
downtime / lost production. The most high profile MER document being the Wood Review (https://www.ogauthority.co.uk/about-us/what-we-do/the-wood-review/)

Although there has been a continuing downward trend in the number of plant losses, there remains an ever growing demand to limit UK Oil / Gas production outages, so as to maximise what income is available.

Most importantly, the presenters explained how gains to production efficiency can be achieved by approaching integrity management in a very different manner than has been the case before, through taking a long-term (but modular) view, with improved collaboration and engagement, assisted in all this by modern IT tools and devices that control data and costs more effectively.
The McKinsey Global Institute (2017) has studied in detail the longer term economic impact of “short termism”, and industry’s reluctance to invest in larger / longer maintenance projects. McKinsey claim that this figure is as high as 87% of executives and directors that feel pressured to demonstrate strong financial performance within 2 years or less, thus limiting available anti-corrosion / preventative maintenance expenditure.

In line with the McKinsey findings, PIM proposed that large maintenance projects be broken into more manageable / more achievable smaller repair / intervention scopes that target just one specific area or system, under a single project manager. This approach was then explained in greater detail by looking at the specific needs of upcoming CUI / PFP / FM preventative maintenance programmes and how they could be accommodated within this new modular approach to minimise external corrosion risks.

The full text of this most interesting and informative presentation can be seen at: https://www.youtube.com/watch?v=6Y36lf6ApIE

The February meeting was billed as a special Coating / Linings event, with two very knowledgeable presenters, Ajith A Varghese from International Paint Ltd and Gary Carswell of AEGION Group of Companies, who gave most interesting talks on Corrosion under Insulation (CUI) preventative coatings and Anti-Microbial Pipeline Linings, respectively.

The well attended Special Coatings Event at RGU in February.

The well attended Special Coatings Event at RGU in February.

Firstly CUI, which is a major issue that causes great cost to industry, and is currently the subject of a major project by the Oil & Gas Technology Centre, Aberdeen (OGTC). CUI poses a significant operational, safety and economic challenge. This is magnified in the North Sea, where many of the assets and infrastructure are operating well beyond their expected design life, and the OGTC vision is to eliminate all corrosion failures due to CUI by 2026.

Ajith A Varghese from International Paint presents on alkylated amine epoxies.

Ajith A Varghese from International Paint presents on alkylated amine epoxies.

Ajith explained in great detail, the mechanisms of CUI, the integrity risks created, and the extensive research and development programmes undertaken in their Newcastle Laboratories. All prevailing ISO and NACE Standards, and their recent amendments, were discussed in the context of developing a new preventative product, and the lengthy but very necessary processes by which this is then taken to market, incorporating lessons learnt from field trials and customer feedback. In particular alkylated amine epoxies were discussed, which have been proven to have superior DFT cracking tolerance to over-application and increased productivity even at low temperatures, compared to standard epoxy phenolic systems.

Gary Carswell then explained in the context of internal corrosion prevention, how the use of protective pipeline liners has been very widely adopted by both the Energy and Non-Energy Sectors.
MIC related pipeline leaks typically account for 40% of all corrosion related failures, thus these compressive and rotational liner insertion processes can bring great advantages and enormous savings by extending the lives of water injection lines offshore and in many water distribution systems onshore. The 47km long Tweedsmuir offshore water injection lining was a prime example of this technology being put into practice for North Sea operations with sections pre-lined before laying.

This technology incorporates anti-microbial mitigation chemicals into the lining system that can then successfully prevent the growth and spread of MIC organisms. Typically a design life of 25yrs is specified for such lining systems but further R&D programmes are working towards a 50 year design life. In service failure of linings is extremely rare, provided adequate care is taken in respect of preparation and across pipeline joints.

Gary explained the many different lining types that protect against internal corrosion, their application systems and different geographical needs, in a very informative manner that was appreciated by all.

Both January and February talks generated many questions from the audience, which were well responded to by the speakers. The talks will be the subject of follow-up technical papers later in Corrosion Management.

Dr Yunnan Gao, the ICorr Aberdeen Chair, congratulated all speakers and presented them with Certificates of Appreciation.

Branch Chair Dr. Yunnan Gao presents a Certificate of Appreciation to Gary Carswell of Aegion.

Branch Chair Dr. Yunnan Gao presents a Certificate of Appreciation to Gary Carswell of Aegion.

The next technical evening, which will be run jointly with the Marine Corrosion Forum, will be held on Tuesday 30 April, when Dr. Ian Carpenter of Scaled Solutions, will present a talk on ‘Corrosion Inhibitor Screening: Impact of Test Approaches’ For the convenience of MCF conference attendees, this event will be held at ICorr’s old home, the Palm Court Hotel, starting at 5.30 pm.

Prior to this, a large range of papers will be presented by MCF commencing at 10.30 a.m, including:
• Oilfield reservoir souring; Forecasting of Microbiological sour gas production using the DYNAMICTVS© model, by Matt Streets of Rawwater Engineering.
• A comprehensive approach to Integrity assessment of Critical structural components operating in Marine environments with ASPIRE™ by Sebastian Hartmann, Payam Jamshidi, Innospection and TWI.
• CP inspection and monitoring of Subsea pipelines by Ross Fielding of Impalloy Ltd.

A full list of upcoming presentations can be found at https://www.marinecorrosionforum.org

Looking further ahead, the branch will be hosting its annual full-day Corrosion Awareness course on 27 August 2019, comprising of a number of lectures / presentations focusing on microbiologically influenced corrosion (MIC) in pipeline systems. This year’s CAD programme will include talks by ROSEN specialists and other visiting speakers, on their MIC experiences from global operations covering – Sampling, Analysis, Monitoring of Pipelines for MIC damage, Chemical Mitigation / Cleaning Strategies and finally Inspection, Modelling and Monitoring approaches.

Most certainly this event will provide a very comprehensive introduction, to this very significant and often troublesome area of Corrosion Control / Prevention.

As usual, all branch presentations can be found on: https://sites.google.com/site/icorrabz/resource-center, and full details of future events can be found on the diary page of the magazine and on the website, or by contacting, ICorrABZ@gmail.com

Aberdeen Branch News

Aberdeen Branch News

The branch was very pleased to welcome retiring ICorr President Sarah Vasey on her farewell tour, to the committee Christmas dinner, which was held at the beginning of December. Sarah has taken a great interest in the work of the branch, as with other UK Branches that she has helped to develop during her Presidency.

L to R: Dr. Muhammad Ejaz, Amir Attarchi, Hooman Takhtechian, Dr. Nigel Owen, Sarah Vasey, Dr. Yunnan Gao, Zahra Lotfi, Bryn Roberts and Stephen Tate of the Aberdeen Branch Committee.

L to R: Dr. Muhammad Ejaz, Amir Attarchi, Hooman Takhtechian, Dr. Nigel Owen, Sarah Vasey, Dr. Yunnan Gao, Zahra Lotfi, Bryn Roberts and Stephen Tate of the Aberdeen Branch Committee.

At the November joint meeting with IOM3, Dr Ed Wade gave a presentation to an audience of over 50, on the subject of “Downhole Metallurgy and Corrosion – from the first pipe, to current challenges”, which proved a fascinating insight into the topic that had everyone glued to their seats.

Dr Wade originally trained as a metallurgist and his interest in downhole metallurgy developed during 13 years spent with Marathon Oil in Aberdeen and subsequently as an independent consultant. Since 2004, he has delivered more than 40 training courses focussed on the selection of corrosion resistant alloys for downhole applications, including ‘open’ courses promoted in Aberdeen by the Mining Institute of Scotland (a local affiliate society of IOM3).

Starting with the first use of downhole pipe, the talk progressed through subsequent developments that have remained central to current practice; recent novel HP/HT challenges were also outlined, before closing with an overview of future very challenging downhole requirements for Geothermal Energy and Carbon Storage, such as United Downs Deep Power Project in Cornwall, that will require many thousands of new deep / high performance wells to be drilled and operated under highly corrosive conditions.

It was a fascinating tour through 159 years of metallurgical advancement of tubular goods, commencing with the Drake Well in 1859, (that went on to operate for another 40 years), through to the development of modern API Specs and Coding Systems, trends and advances in North Sea CRA use for tubulars, together with an explanation of how corrosion mechanisms such as Ringworm have been eliminated through improved heat treatments.

The difficulties in adequately simulating and testing for all downhole situations was highlighted along with the sometimes intermittent, and sometimes unplanned operational practices of the Oil and Gas and other Industries, which place huge demands/expectations on material performance in sometimes rapidly changing conditions.
The need for materials to withstand highly corrosive sub-surface gases at very high partial pressures for extended periods, and the difficulties of successfully implementing preventative chemical treatments at immense depth were clearly explained.

It was also evident that composites have still yet to make huge in-roads into the market place f0r downhole use and to successfully compete with the available wide range of corrosion resistant metallics. The main problem here seems to be industry confidence in non-metallics, as being relatively new, difficult to manufacture, and not having well established test protocols for downhole scenarios.
The event generated many questions from the audience that were very well responded to by this distinguished speaker.

The branch 2018/19 session continues on 26 February, with a special coatings technical event. Ajith Varghese of International Paint will talk on ‘A Novel Approach to Combatting CUI’ and Michael Baraky (RMB Products) and Rob Mackie (United Pipeline Systems), will discuss ‘MIC-Resistant HDPE Linings for Seawater Applications’.

Branch Chair Dr. Yunnan Gao presents a Certificate of Appreciation to Presenter Dr Ed Wade of Metal Ecosse after the Event.

Branch Chair Dr. Yunnan Gao presents a Certificate of Appreciation to Presenter Dr Ed Wade of Metal Ecosse after the Event.

Dr Ed Wade’s paper can be found on: https://drive.google.com/file/d/1N2CqylMutsUOjAj5ixPsFeHoRsr1gL1p/view?usp=drive_web and all past Aberdeen ICorr Presentations can be found on: https://sites.google.com/site/icorrabz/resource-center

Full details of future events can be found on the diary page 
of the magazine and on the website, or contact: ICorrABZ@gmail.com

Aberdeen Branch News

Aberdeen Branch News

The branch has now moved its activities to the Sir Ian Wood Building, Robert Gordon University (RGU), which provides ‘State of the Art’ Teaching / AV Facilities, and kicked off its new session with some thoughtful insights into the complex issue of Preferential Weld Corrosion (PWC) in a presentation by Neil Gallon and Michael Young of Rosen. This meeting was also the annual joint event with TWI (The Welding Institute) North Scottish Branch.

Pre-September meeting networking at the Robert Gordon University.

Pre-September meeting networking at the Robert Gordon University.

PWC is of increasing concern to many operators, especially in relation to ageing assets. This talk helped explain what exactly PWC was, and discussed some of the many complex welding parameters / considerations and features that can lead to PWC. The talk also discussed procedures for diagnosis of PWC, identification of mitigation options, and highlighted several other difficulties and issues that can arise with both of these aspects in relation to PWC management.

September speakers (L to R), Neil Gallon and Michael Young (of Rosen) with Aberdeen Branch chair Dr Yunnan Gao, and Mark Bragg, Technical Secretary 
of TWI North Scottish Branch.

September speakers (L to R), Neil Gallon and Michael Young (of Rosen) with Aberdeen Branch chair Dr Yunnan Gao, and Mark Bragg, Technical Secretary 
of TWI North Scottish Branch.

September speakers (L to R), Neil Gallon and Michael Young (of Rosen) with Aberdeen Branch chair Dr Yunnan Gao, and Mark Bragg, Technical Secretary 
of TWI North Scottish Branch.

Immediately preceding the September event, committee Member – Ms. Zahra Lotfi, Snr. Corrosion Engineer, Oceaneering International, gave a presentation to students of the School of Engineering, explaining how corrosion control is an essential part of engineering design and maintenance of every aspect of our lives – our buildings, transport, gas, oil, water industries, and emphasising how all depend for their survival on its prevention. This event was part of a series of talks to Aberdeen University and RGU University students to encourage them to take up free ICorr membership and to become more involved in the corrosion community.

The well attended September event on PWC for subsea and topsides welded systems.

The well attended September event on PWC for subsea and topsides welded systems.

The well attended September event on PWC for subsea and topsides welded systems.

Vice chair Stephen Tate followed on from these university presentations by providing assistance to the AFBE-UK Transition and Interview Programme on 13th October. AFBE-UK promotes higher achievements in education and engineering particularly among people from black and minority ethnicity backgrounds. Interested parties can seek further information at https://afbe.org.uk/about-us
In October, Chris Burke, Technical Consultant / Product Manager of Emerson – Permasense gave a presentation on “Non-intrusive wall thickness monitoring”. Permansense was originally a joint research project between BP and Imperial College, London, and is now part of Emerson, operating worldwide with currently over 20,000 sensor devices in-service.

Changes to process operations can often have a significant impact on plant integrity. For example the onset of sand production can be caused through increases in the drawdown on a well and high flowrate from bringing on new or previously shut-in wells, and which can impact on the effectiveness of chemical corrosion inhibitors. Current long-term risk-based asset integrity methodologies cannot predict these sudden operational events, meaning the increased levels of erosion or corrosion that these events can cause can often go undiscovered until the next planned inspection, and risk failing before that.
Chris spoke about optimizing plant integrity through continuous wall thickness monitoring using fully wireless ATEX rated equipment for automated UT, that can be very quickly set-up at upstream and downstream energy sites.

Chris Burke of Emerson-Permasense, explaining sensor technology.

Chris Burke of Emerson-Permasense, explaining sensor technology.

Chris Burke of Emerson-Permasense, explaining sensor technology.

This talk complemented the September one, in that the sensors are now also being installed to monitor PWC, and this will be the subject of a future technical article.
The presentation reviewed the increasing use being made by many operators of continuous / automated wall thickness monitors as a means to not only track erosion and corrosion in areas of concern, but as a means of identifying underlying process operations responsible – thereby facilitating and validating corrosion mitigation strategies online so that timely, evidence-based, integrity management decisions can be made.

Advantages of these new tools to corrosion / integrity engineers were discussed in great detail, prompting many questions from the large audience on matters relating to sensor installation methods, durability, system size, and data management.

All past Aberdeen ICorr Presentations may be found on:
https://sites.google.com/site/icorrabz/resource-center

Full details of future events can be found on the diary page of the magazine and on the website, or contact: ICorrABZ@gmail.com

ICorr Aberdeen Branch – Corrosion Awareness Day 2018, (Emerson Automation Solutions)

The Annual Aberdeen CAD Event this year took place at the Training Centre of our Key Sponsor – Emerson Solutions Automation, who generously provided numerous Training Materials, expert Technical Demonstrations and of course some first class Catering.
Our Attendees (45 in all) came from across many different Industries and from many areas of the UK, skilfully co-ordinated by Denise Aldous and Gwynneth Moore at ICorr HQ.
As in previous years, all our Aberdeen Branch Sponsors were invited to send 2 representatives each and there were additionally 20 fee paying attendees who confirmed the event as being excellent value for money

Delegates and Trainers of the 2018 Aberdeen Corrosion Awareness Day, at the Emerson Training
Facility, Dyce with Andy Young (Site Team Manager at Emerson Automation Solutions) in centre.

The Event had 2 Key Objectives:
1). To assist in the development of those unfamiliar with Corrosion Prevention Issues.

2). To raise funds for ICorr, to maintain its ongoing Education Programmes / Events.

In what was a very busy programme, delegates were treated to an excellent mix of Theory and Practical Demonstrations, along with many Exhibits of failed Metallic Components, Coatings and of course a few more modern, Non-Corrodable options.

List of Speakers:

1 – Dr Odagboyi Philip Enegela, Ceng, MIMMM, MICorr, (Repsol Sinopec).

2 – Dr Muhammad Ejaz, CEng FIMMM, MICorr, MPIE, (PIM).

3 – Dr Carol Devine, BSc, PhD, (ICR Integrity).

4 – Dr Nigel Owen, B.Sc D.I.C, Ph.D, MIMMM, (Aberdeen Foundries).

 5 – Stephen Tate, MBA, PG. Dip. Eng, MICorr (CAN/TEPUK).

6 – Hooman Takhtechian, MSc, CEng, MIMMM, (Oceaneering).

7 – Chris Burke, BEng (Hons), MIET, (Emerson Automation Solutions).

8 – Fiona Butters, BA (Hons), (Emerson – Roxar), supported by Ionut Cadar (Emerson Corrosion Solutions Central & Eastern Europe).

 9 – John Thomson, (Emerson – Rosemount).

10 – Steven Healy, (Emerson – Flow Solutions).

11 – Chris Burke, BEng (Hons), MIET, (Emerson – Permasense).

A short CAD Test closed the day, with all delegate’s achieving over 75% pass rate.
Members of the ICorr Aberdeen Committee provided all the morning lectures, with a comprehensive programme covering, Principles and Costs of Corrosion, Corrosion Modelling, Bacterial Corrosion, Cathodic Protection, Materials and RBI – Risk Based Inspection.

The afternoon session was purposely designed to complement the morning session, with demonstrations of all types of Process Control Instrumentation by the Emerson Technical Team – Compositional, Flow, Pressure and Temperature Measurement (for Corrosion Modelling Inputs), Intrusive Corrosion Monitoring Devices of all Types and Non-Intrusive Clamp-on and Magnetic NDT Devices for Wall Thickness Monitoring. All the above instruments provide valuable data for CRA’s – Corrosion Risk Assessments and RBI / Schemes of Examination.

The range of Metallic Materials and Non-Metallic Substitutes on Display, including In-service Failed Components from UK Offshore Production Facilities and many Onshore Applications

Preceding the Demonstrations was a very interesting talk on the full range of Automation Solutions, many now available as APPS for Mobile Devices.
It was very evident, that increasingly the trend is towards data being supplied directly to the Corrosion Engineer, giving them far greater control than was ever possible previously and the development of software programmes that support risk assessments and FFS – Fitness for Service activities. These new ways of working are still supported when required, by data feeds and longer-term trends from conventional DCS – process control systems / panels.

Dr Philip Enegela (Repsol Sin0pec) enthusiastically opened proceedings with insights into Natural Corrosion Behaviours

Dr Muhammad Ejaz (Plant Integrity Management) captured all the key aspects of CO2, H2S and O2 Corrosion Modelling

Dr Carol Devine (ICR Integrity), introduced us to the fascinating world of Bug Growth and Microbial Management

Dr Nigel Owen (Aberdeen Foundries) took us further into the Marine World with his specialist knowledge of CP Systems Supply and the ‘day to day’ operations of an Alloy Foundry.

Stephen Tate (CAN/TEPUK), co-ordinated the 2018 CAD Event on behalf of the Aberdeen ICorr Committee and presented on the theme of In-Service Materials Failures and Site Detailing.

Hooman Takhtechian (Oceaneering), took us into the complex World of Corrosion Risk Management and RBI – Risk based Inspection

Chris Burke (Emerson – Permasense) introduced us all, to Modern Process Automation and Measurement Methods

Fiona Butters (Emerson – Roxar) and Ionut Cadar (Emerson Corrosion Solutions Central & Eastern Europe) neatly explained the concepts of Advanced Intrusive Corrosion Monitoring

Advanced Process Instrumentation and Flow Measurement being demonstrated by Steven Healy (Emerson – Flow Solutions)

John Thomson (Emerson – Rosemount) explained, the many options and principles of Pressure and Temperature Process Control

Afternoon – One to One Discussions in the Emerson Workshops with Chris Burke (Emerson – Permasense)

The day finished with Certificates of Appreciation being issued to all the contributing speakers and CPD Certificates being issued to all attendees followed by a vote of thanks to our excellent hosts Emerson, to whom ICorr Aberdeen is extremely grateful for all their financial support, to its 2018 CAD Event.

At the Close of Play, thanks were given to all of the days Speakers, Dr Carol Devine (ICR Integrity) receives her Certificate of Appreciation from CAD Chair Stephen Tate (CAN/TEPUK)

All the day’s slides may be found under “2018/2019 ICorr Aberdeen Presentations” Folder on our Site.
https://sites.google.com/site/icorrabz/resource-center

ICorr Committee have also obtained all the shared photographs from the day and saved them under ICorr Aberdeen Event Online Album at:
https://photos.app.goo.gl/8F7QkQHpBrCqCj81A

Next year’s Aberdeen CAD Event is now in preparation and will take place at the Palm Court Hotel next year, kindly sponsored by Rosen, (now incorporating Macaw).

Meanwhile, Emerson Permasense will present on the theme ‘Optimising Plant Integrity and Solids Control through Continuous Non-Intrusive Wall Thickness Monitoring’ at Robert Gordon University (RGU) Garthdee Road, Aberdeen, AB10 7AQ, 6pm on 30/10/2018.

ICorr Aberdeen AGM meeting & Industrial Visit to Sonomatic- Presentations and Showcasing Kit and Facilities on overcoming and Identifying Corrosion/Integrity Challenges

The 5th branch event of 2018 took place on Tuesday 29th May 2018 with 46 attendees and with 29 CPD Certificate’s issued on conclusion of the Event.

The evening opened with a short AGM and election of a new committee for 2018-2019 session.

Next year’s Technical Meetings will be held at a new venue – The Robert Gordon University (RGU).

In terms of the committee members, Aberdeen Branch have secured continued commitment from all the existing 2017/2018 members. In addition, we have elected a new committee member, Ms. Zahra Lotfi (MICorr, CEng) who will service the branch from the 2018/2019 session.

Also the branch welcomed back a former committee member, Dr. Muhammad Ejaz who took a sabbatical year in the 2017/2018 session and has returned for the 2018/2019 session.

The established formation of ICorr Aberdeen 2017/2018 committee is now as follows:

Officers:

  • Chair: Dr. Yunnan Gao
  • Vice Chair: Mr. Stephen Tate
  • Corrosion Awareness Chair: Bryn Roberts
  • Secretary – External: Mr. Stephen Tate
  • Secretary – Internal: Dr. Nigel Owen
  • Treasurer/Finance Officer: Mr. Alistair Seton
  • Event Co-ordinator: Mr. Amir Attarchi
  • University Liaison and CPD Officer: Ms. Zahra Lotfi

 Ordinary Committee Members:

  • Bryn Roberts
  • Hooman Takhtechian
  • Muhammad Ejaz
  • Philip Enegela.

This month’s meeting  was a very informative Industrial Visit to Sonomatic (ABZ), with many Presentations and showcasing Specialist Equipment and Facilities for Overcoming / Identifying Corrosion and Integrity Challenges.

It was a wonderful opportunity to witness so many different inspection technologies on display together and it was greatly appreciated by all who came along. It was also very interesting to hear about the Links between Industrial NDT as used extensively in the Oil and Gas Industry and Medical applications of these advanced techniques.

The applicability of the use of NII and possible time saving’s, was explained in the context of the main NII Grading’s of Table 4-1 of G103:

  • Type A – No Corrosion likely and Minimum Inspection Requirements / Coverage.
  • Type B – Predictable Corrosion Locations / Moderate Rates and Medium Inspection Requirements / Coverage.
  • Type C – Unpredictable Corrosion Locations / High Rates and 100% Inspection Requirements / Coverage.

A wide range of Non-Intrusive verification methods were demonstrated, along with discussion of Non-Intrusive Codes such as DNVGL-RP-G103 as further developed by HOIS Joint Industry Project and others.The need for close working co-operation between Inspection Teams and Corrosion Engineers was stressed. Also the importance of post inspection analysis / data review and statistical analysis. When correctly calibrated and deployed, these specialist techniques provide an extremely useful 3 dimensional record of the completed inspection with all high risk areas highlighted / colour coded according to depth of corrosion penetration / pitting.

A full tour of the Sonomatic facilities was kindly provided along with an excellent buffet.

The use of LRUT as an effective screening tool was explained in detail to the audience. Weld locations maybe clearly visualised as high amplitude peaks, as illustrated below. When used properly, LRUT flags up areas showing corrosion activity which require further investigation. This does not necessarily stop at the specific location(s) of the indication(s) detected, but it triggers the operator to perform a higher level of investigation. For instance, if defect indications are detected in sections of straight pipe, adjacent elbows or other fittings may warrant inspection using a complementary NDT technique, e.g. CHIME.

CHIME is a semi-quantitative tool used to inspect pipe material located between two UT probes, which can be up to 1m apart. This is ideal method for pipe supports. LRUT indicates only where there is an indication but CHIME® classifies indications into categories of:

a. No corrosion. b. < 10% wall loss, c. 10% to 40% wall loss d. >40% wall loss

Later in the evening the DRS – Dynamic Response Spectroscopy demonstration showed how modern composite coatings / wraps such as Coal Tar Enamel, Neoprene and Multi-Layer Polypropylene could be effectively inspected, highlighting variations in thickness, the ability to detect internal pitting to +/- 0.5mm and any significant coating defects. DRS uses lower test frequencies to deal with these thicker type coatings.

 

 

At the end of the evening, a vote of thanks was given to all the Sonomatic staff, who contributed to this very successful event.

Throughout the evening, wide range of questions followed the very comprehensive presentations and all the presenters’ slides will be available soon on,https://sites.google.com/site/icorrabz/resource-center

Other event photo’s are available on: https://photos.google.com/share/AF1QipO2x5hHaJom3g5ZXwhs6CCqk8sW37gVZjCicIU8HoOVqBTpsiLHuQ9p4t4Y_iK34Q?key=YkduRGtLQzNxcjVRMDlRUnd6NmE1Ujlucmh0dHV3

For information about all forthcoming Aberdeen branch activities, please contact, Dr Yunnan Gao, ICorrABZ@gmail.com.  To sign up to the branch mailing list, go to https://sites.google.com/site/icorrabz/home