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The Manchester Metallurgical Society Seminar entitled ‘Internal Intergranular Stress Corrosion Cracking of Shale Gas Flow lines’

Dates:5 November 2019
Times:18:00 - 20:00
What is it:Seminar
Organiser:Department of Materials
Speaker:Dr. Edward Heaver
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  • By Department of Materials

The cause of leaks in Shale Gas flowlines was investigated. Cracks were found at girth welds joining API 5L X52 pipe. Cracks initiated on the inside surface at the lower quadrant. They were intergranular and multi-branched having features similar to amine stress corrosion cracks in refineries and external carbonate cracking in gas transmission lines. Low flow rates permitted spent hydrogen sulphide scavenger comprising of monoethylamine (MEA) to accumulate at low points in the flowline. Reaction between high pH MEA and carbon dioxide from the process gas formed a carbonate/bicarbonate solution which together with high residual stresses from welding caused intergranular stress corrosion cracking (IGSCC) of the carbon steel.

E. HEAVER obtained a B.Sc. (Hons) degree in metallurgy from Aston University followed by four years conducting metallurgical failure analysis of mining equipment for RCM/ NCCM Mining Industry Technical Services, Zambia. Joining SASOL, he obtained a Ph.D. from a study of CO-CO2-H2O stress corrosion cracking in tail and reformed gas circuits. After working for 15 years in the down¬stream petrochemical industry, he moved to BHP Petroleum, where he worked on upstream oil and gas materials performance for more than 20 years. He recently founded Real Life Metallurgy, materials engineering consultancy, based in Manchester.

Free buffet from 18:00 in the foyer of the MSS Tower

Speaker

Dr. Edward Heaver

Organisation: Real Life Metallurgy

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MSS Tower
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