American Society for Non-Destructive Testing
September 11, 2017
The Chicago Section of ASNT met on Monday, September 11, 2017 with seventeen members in attendance at the Crazy Pour Restaurant in Villa Park, Illinois.
The speaker for the evening was Dr, Christopher Woods, Director of the Oriental Institute Museum at the University of Chicago. He obtained his doctorate from Harvard University in 2001 and has been studying ancient languages since then. The title of his talk was, "New Light on a Proto-Literate Accounting Device: The Study of the Clay Envelopes from ancient Mesopotamia". Dr. Woods spoke on the use of computed tomography for investigating ancient clay envelopes from Mesopotamia around the second to third millennium BC. The clay envelopes were used as ancient receipts when commodities were traded or sold. Some envelopes had been broken open in ancient times, but some were still intact. Sealed inside the envelopes are tokens that represent the commodities sold. On the tokens are markings that are thought to represent specific items, such as cattle or grain. When the envelopes ceased to be used, clay tablets took their place and cuneiform writing began. The CT scans were used to view the tokens inside the sealed clay so that they would not have to be broken open. Some tokens contain symbols that continued to be used on clay tablets. Archaeologists believe that this may have been the beginning of writing.
New NDT methods have impacted artifact analyses and the subsequent understanding of written communication, religion, mathematics and commerce. Alloyweld Inspection and Northstar Imaging introduced CT technology to the Oriental Institute Museum and assisted Dr. Woods in obtaining the scans on fourteen clay envelopes.
Dr. Chris Woods (left) of the Oriental Institute Museum, University of Chicago receives ASNT Chicago Section globe award for his presentation from Chuck Johnson of Karden Sales, Chicago Section Chairman.
Previous Meetings - Pictures and Overviews
October 11, 2017
The speaker for the joint meeting of ASNT and AWS Chicago Sections on October 11, 2017 was Stuart Kleven, Quality Engineer and Responsible Level 3 at Alloyweld Inspection Company, Bensenville, Illinois. Twenty eight members and guests were present at the Bohemian Crystal Restaurant in Westmont, Illinois.
Stu’s talk was entitled, “Fabrication and Inspection of Caustic Pumping Skids.” Alloyweld fabricated all the 316 stainless steel piping on two pumping skids. The work was performed to ASME B31.3, Normal Fluid Service and an extensive customer project specification. The customer supplied the piping components, skids, pumps, valves and pulsation dampeners. Alloyweld developed and qualified the weld procedures, qualified the welders, built the piping sub-assemblies, tested and then assembled the systems. A final operational test was performed along with hydrostatic testing. The piping sub-assemblies underwent, computed digital x-ray inspection of all the welds, positive metal identification of all components and welds using x-ray fluorescence, visual inspection, borescopic inspection of the weld roots, liquid penetrant inspection of the welds and a baseline ultrasonic wall thickness check of all piping components. A detailed mapping and documentation package was also included.
Stuart Kleven (center left) from Alloyweld Inspection receives the Chicago Section globe award
from ASNT Chicago Section chairman, Chuck Johnson of Karden Sales (center right)
AWS Chicago board member, John Hesseltine, SCWI (far left), Cliff Itimie, AWS Chicago Chapter chairman (far right)