Materials Performance

SEP 2018

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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49 MATERIALS PERFORMANCE: VOL. 57, NO. 9 SEPTEMBER 2018 (though seemed to be unviable), such as selecting representative tub es using statistical sampling techniques followed by removing the spiro-vanes and then conducting ECT inspec- tions. Additionally, developing integ- rity operating windows by lowering the operating pressures may have avoided the equipment failure. 2. Operational changes and materials degradation may render OE M as- built data as inapplicable for assess- ment as well as repair work. There- fore, the validity and applicability of OEM fabrication procedures (e.g., WPS and hydrostatic testing) and the inspection and testing plan should be checked before using them for deci- sion-making as well as repair work. This would, in turn, require review from reliability personnel and other plant stakeholders. 3. Awareness of potential degradation of m a t e r i a l p r o p e r t i e s , su c h a s increased hardness and loss in ductil- ity, could have proactively revealed the risk of cold cracking of welds. This could have led to the inclusion of a response plan and thereby elimi- nate delays due to requalification and approval of revised WPS, idle staff hours caused by holds on welding work, extra costs incurred by order- ing of ENiCrFe-3 electrodes, and con- sumable wastage due to inapplicabil- ity of available E-308 L electrodes. 4. Implementing RBI for these types of scenarios doesn't necessarily demand costly tools and outsourcing; rather it can be a simple, qualitative effort done by in-house reliability and cor- rosion personnel. 5. Finally, using an RBI approach (even qualitative 7 ) at all levels of an inspec- tion and testing plan's development and implementation is an important step toward the organizational goal of a facility 's reliable and evergreen RBI. References 1 A. Rana, "Effective Turnaround Maintenance Philosophy," The ENGINEER Magazine 30, 4 (Winter 2017): p. 20. 2 A. Rana, "Decision Making—A Manager's Challenge," The ENGINEER Magazine 31, 1 (Spring 2018): p. 19. 3 API RP 571, "Damage Mechanisms Affecting Fixed Equipment in the Refining Industry " (Washington, DC: API, 2011). 4 "Understanding Weld Cracking, Its Causes, Consequence…and Remedies," September 3, 2 0 0 9 , h ttp : / / w w w. h o b a r t b r o t h e r s . c o m / index.php?mact=News,cntnt01,print,0&cnt nt01articleid=48&cntnt01showtemplate=fal se&cntnt01returnid=523 (March 24, 2018). 5 API RP 581, "Risk Based Inspection Method- ology" (Washington, DC: API, 2016), pp. 100- 110. 6 Project Management Institute, A Guide to Project Management Body of Knowledge, 5th ed. (Atlanta, GA: PMI, 2013), p. 339. 7 API RP 580, "Risk Based Inspection" (Wash- ington, DC: API, 2016), p. 18. AHMAD RAZA KHAN RANA is a MASc materials engineering candidate at the Department of Mechanical Engineering, Dalhousie University, Halifax, Nova Scotia, Canada, email: ahmaduetian141@gmail. com. Rana has a mechanical engineering background and has performed various field construction, commissioning, mainte- nance, and reliability tasks for oil refiner- ies, petrochemical units, and fertilizer plants. He is an API 571-certified Materials and Corrosion Inspector, an API 580-certi- fied Risk-Based Inspections Professional, and a Project Management Institute-certi- fied Project Management Professional. Rana holds an Engineer in Training (EIT) license from the Association of Profes- sional Engineers of Nova Scotia (APENS) and Association of Professional Engineers & G e o - S c i e n t i s t s o f S a s k a t c h e w a n (APEGS). ZOHEIR FARHAT is a professor and chair of the Materials Engineering Program, Department of Mechanical Engineering, Dalhousie University, email: zoheir.farhat@ dal.ca. As a professor in materials engi- neering, Farhat has over 20 years of expe- rience in the field of degradation and micro-mechanical characterization of advanced materials and coatings. He is the director of the Advanced Tribology Lab at Dalhousie University, and holds a Profes- sional Engineer license from APENS. FIGURE 1 A decision tree diagram for replacing or repairing the tube bundle. Read MP Online NACE International members have free access to MP Online, with back issues to 2005. Access the digital issues of MP at www.materialsperformance.com/magazine. Mitigating Material Damages Through Risk-Based Inspections

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