How to Sufficiently Identify and Monitor Hot Hydrogen Attack (HHA)
Hot Hydrogen Attack (HHA) is a form of degradation brought about by hydrogen reacting with carbon which in turn can cause cracks and loss of strength in steel. For this reason, the presence of hydrogen in industrial plants is a potential source of damage that can cause unsafe situations. In weld material, HHA can lead to a leak but when the damage is in the parent material, the result can be catastrophic. Therefore, it is both crucial and required to precisely and adequately monitor HHA.
To support owners of industrial facilities, SGS Pakistan, in cooperation with SGS Netherlands, conducted a seminar on Hot Hydrogen Attack and the most efficient Advanced Non-Destructive Testing (NDT) techniques to detect it.
Held on March 18, 2009 at the Pearl Continental Hotel in Karachi, Pakistan, the seminar aimed to provide industrial facility owners a platform to better understand the process of HHA. For the very first time, attendees from different industrial fields had the chance to share their views and insights on the various ways that advanced inspection techniques can work for them.
The seminar, which gained great interest, was presented by NDT specialist Mr. Norbert Trimborn from SGS Netherlands, as well as Honorable Director of Operations Mr. Abdul Razzak Lakhani and Operations Manager Mr. Muhammad Aqeel, both from SGS Pakistan. Attendees were taught about the formation of HHA in steel and welds and its destructive effects on industrial plants. They also presented the most efficient advanced inspection techniques offered by SGS Industrial Services for the detection of HHA.
The seminar especially highlighted Advanced Ultrasonic Inspection methods like Time of Flight Diffraction (TOFD), Automated Backscatter and Velocity Ratio Measurements. By combining these three advanced NDT techniques, SGS Industrial Services has developed a specific procedure and approach to sufficiently identify and monitor HHA.
To detect the possible occurrence of Hot Hydrogen Attack, SGS sets up a precise inspection plan with the backscatter technique using Corroscan for the most critical areas. In order to distinguish between HHA and small inclusions and to verify the attack, additional measurements are taken using the velocity ratio technique. For the inspection of weld material, the scanning of all welds with TOFD and manual or automated pulse echo is required.
SGS Industrial Services, the world’s leading inspection, verification, testing and certification company, has the knowledge, expertise and experience to perform extensive NDT inspections around the world through a comprehensive international network. Services offered by SGS cover both conventional and advanced NDT systems to ensure quality assurance and process safety.
Send us your inquiry on SGS Non-Destructive Testing Services now.
For more information, please contact:
Engr. Sami IqbalAssistant Manager Business Development
SGS Industrial Services
SGS Pakistan (Private) Limited
H-3/3, Sector-5, Korangi Industrial Area
f: +92-21 35121325
Email SGS Industrial ServicesWeb: SGS NDT Services The SGS Group is the global leader and innovator in inspection, verification, testing and certification services. Founded in 1878, SGS is recognized as the global benchmark in quality and integrity. With more than 56,000 employees, SGS operates a network of over 1,000 offices and laboratories around the world.