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|
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
Dr. Edward Heaver
Organisation: Real Life Metallurgy
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