October AMP_Digital

A D V A N C E D M A T E R I A L S & P R O C E S S E S | O C T O B E R 2 0 1 9 6 6 STRESS RELIEF LESSONS LEARNED AT LOCAL BREWERY Beer making involves proper fermentation to achieve a tasty result. Brewmasters start with grist, the ground barley malt. Grist is mixed with water to become the mash, which is then pumped into a tun, where the mash is boiled. Within the mash tun, hop flow- ers may be added. Yeast is put in during fermentation. The mash tun is an important com- ponent as it brings the mash to a boil, sterilizing the malted wort and continuing to break down complex starches. At a local craft brewery, forensic engineers at Engineering Design & Testing Corp. (EDT) were called in to investigate a mash tun failure. The unit in question was newly con- structed with integral mixing paddles suspended from the top dome, an upper cooling water jacket, and a lower boiling water jacket. Examination of the tun’s interior revealed the upper jacket had collapsed into the tun, most pronounced at the two locations where the bearing for the mixing paddle shaft was supported. Review of the paddle assembly revealed the bearing was jammed off-axis and the shaft had fractured in the weld at the motor keyway. Further analysis revealed that the support of the paddle shaft bearing was insuffi- cient, allowing radial movement of the paddle assembly in the tun. The bearing locked up off-center, pulling on the walls of the cooling jacket until they collapsed into the tun and the shaft weld fractured. The root cause of the failure was insufficient support of the shaft bearing. Lessons learned: The brewery should ask for the operational history of any tuns they purchase, while the manufacturer needs to realize the importance of fully stabilizing the rotating shafts. edtengineers.com. Mash tun vessel. STATEMENT OF OWNERSHIP, MANAGEMENT, CIRCULATION, ETC. Required by the Act of 23 October 1962, Section 4369, Title 39, United States Code, showing the ownership, management, and circulation of Advanced Materials & Processes ®, publishes eight issues per year: January, February/March, April, May/June, July/August, September, October and November/December at 9639 Kinsman Road, Materials Park, Ohio 44073, USPS # 762-080. Annual subscrip- tion rate is $475. The publisher and editor are Scott D. Henry and Joanne Miller, respectively, both of 9639 Kinsman Road, Materials Park, Ohio, 44073. The owner is ASM International®, Materials Park, Ohio, which is a not-for-profit educational institution, the officers being; Presi- dent and Trustee, David U. Furrer; Vice President and Trustee, Zi-Kui Liu; Secretary and CEO, WilliamT. Mahoney; Treasurer and Trustee, Raymond V. Fryan; Immediate Past President and Trustee, Frederick E. Schmidt, Jr; Trustees, Prem K. Aurora, Larry D. Hanke, Roger A. Jones, Diana Lados, Thomas M. Moore, Jason Sebastian, Larry Somrack, Judith A. Todd, and John D. Wolodko; Student Board Mem- bers Kimberly Gliebe, Ashwin Kumar, and Nisrit Pandey. There are no known bondholders, mortgagees, and other security holders owning or holding 1% or more of the total amount of bonds, mortgages, or other securities. The issue date for circulation data below is September 2019. The average number of copies of each issue during the preceding 12 months is: (a) Total number of copies printed: 7,971; (b) Paid and/or requested circulation: (1) Paid/requested outside-county mail subscriptions: 6,244; (2) Paid in-county subscriptions: 0; (3) Sales through dealers and carriers, street vendors, counter sales, and oth- er non-USPS paid distribution: 548; (4) other classes mailed through the USPS: 0; (c) Total paid and/or requested circulation: 6,792; (d.1) Free distribution or nominal outside-county: 387; (d.3) Free distribution by mail: 406; (e) Total free distribution: 793; (f) Total distribution: 7,585; (g) Copies not distributed: 756; (h) Total: 8,341; (i) Percent paid: 90. The actual number of copies of single issue published nearest to filing date is: (a) Total number of copies printed: 8,349; (b) Paid and/or requested circulation: (1) Paid/requested outside-county mail subscriptions: 5,672; (2) Paid in-county subscriptions: 0; (3) Sales through dealers and carriers, street vendors, counter sales, and other non-USPS paid distribution: 396; (4) other classes mailed through the USPS: 0; (c) Total paid and/or requested circulation: 6,068; (d.1) Free distribution or nominal outside-county: 77; (d.3) Free distribution by mail: 80; (e) Total free distribution: 157; (f) Total distribution: 6,225; (g) Copies not distributed: 2192; (h) Total: 8,417; (i) Percent paid: 97. I certify that the statements made by me above are correct and complete. Scott D. Henry Publisher