Infrasense Present Research at ASNT Bridge and Highway Conference in NY ARLINGTON, MA—The International American Society for Nondestructive Testing (ASNT) recently held their NDE/NDT For Highways and Bridges: Structural Materials Technology Conference in New York City August 21-24, and Infrasense engineers played a key role in presenting recent bridge testing research and practice. The biennial conference aims to, “promote the exchange of information between national and international researchers, practitioners and infrastructure owners on the application of Nondestructive Evaluation (NDE) and Nondestructive Testing (NDT) technologies for the condition assessment of highway bridge and pavement infrastructure.” This year’s conference was attended by nearly 200 people including members of universities, research institutions, transportation agencies, and consulting firms. This marks the sixth time Infrasense has attended and contributed with technical papers, presentations and an exhibit. This year Infrasense staff is primary authors on two conference papers, and a secondary author on a third conference paper. In the area of bridge deck assessment, Adam Carmichael of Infrasense presented the results of an independent evaluation of network-level bridge deck condition assessments in Minnesota.MnDOT has contracted out NDT scanning on 100 bridge decks throughout Districts 1, 3, 6, and metro areas. Most of the work was carried out with ground penetrating radar (GPR), and was supplemented with the use of infrared thermography (IR) on a select number of decks. The purpose of this work was to determine the degree of unsound concrete in each deck so that appropriate maintenance and rehabilitation measures could be taken to maximize the benefit to users for a given budget.As part of this process, MnDOT commissioned an independent study by EVS, Inc. to review cost, accuracy, and usefulness of these NDT methods with respect to their estimation of the actual extent of bridge deck repair. The repair work on 12 of the bridge decks was evaluated.This evaluation found the GPR and IR results to be within 3.5%-4% of actual repair quantities on average. The latest research developments into the detection of deck deterioration were presented by Nicole Martino of Northeastern University, with contributions from Dr. Maser of Infrasense, who serves as a consultant to Northeastern in the field of nondestructive testing in concrete bridge decks. The goal of the research has been to establish a clearer connection between the data generated by the GPR equipment and the different aspects and stages of bridge deck deterioration. To achieve this goal, a full battery of testing was performed on in-service structures, controlled slabs specifically cast for corrosion testing, and slabs extracted from in-service structures during deck replacement projects. The research has already yielded some significant results.Preliminary results have revealed that the spatial correlation between GPR and HCP is 90%, indicating the ability of GPR to detect corrosion activity in bridge decks. Additionally, the spatial correlation between GPR and IE testing for delimitations is 79%. Practical applications of NDE technology for bridge load rating were presented by Dr. Maser of Infrasense. Load rating is carried out on all bridge structures to ensure that they have the capacity to support the expected vehicular loads, or to appropriately restrict the vehicular loading on older and/or distressed structures by posting load limits. For many of these older structures, including culverts, concrete and stone arches, and precast girder bridges, design or as-built plans are no longer available to serve as a reference for the load rating analysis calculations. In these situations, NDE methods are often useful to fill in such missing data as element thickness, depth of overburden (culverts and arches), rebar depth and spacing, and estimated concrete strength. Over the past few years, MassDOT has used these techniques to support load ratings on a large number of structures. In his presentation, Dr. Maser discussed the types of structures that have been investigated, the NDE methods used, the data that was obtained and the methods of analysis, and the resulting information generated for the load rating process. Intertek Acquires NDT Services Ltd LONDON—Intertek Group plc , an international provider of quality services to a range of industries, announces that it has acquired NDT Services Limited (NSL), a provider of nondestructive testing (NDT) services to the aerospace, power and petrochemical sectors. NSL offers on-site and laboratory based NDT of industrial components used in a wide range of applications such as aircraft, pipelines, power stations, refineries and oil platforms. NDT can help assure safety and reliability by identifying any f laws or defects in products or components without disrupting operations or delaying processes. As a quality assurance management tool, NDT can help avoid potential loss of productivity through unplanned plant shutdowns which may occur if materials, products or equipment fail to achieve their design requirements or projected life span. In addition NSL also operates a technical staffing service, offering supplemental qualified NDT engineers to clients experiencing peaks in demand. Demand for NDT has grown, driven by increasing regulation and standardization, extension of asset life spans, shortage in NDT expertise and the need to protect reputation from product failure and recall. Holding a number of industry accreditations and approvals essential for operation, NSL is a regional market leader in providing NDT services in the aerospace sector and a prominent operator in the power sector for the provision of on-site outsourced NDT expertise. Their NDT laboratory in the United Kingdom is widely recognized in Europe as a high-quality facility. With headquarters in Derby, UK, NSL enhances Intertek’s existing quality and integrity management services for owners and operators in the aerospace, power, oil, gas and petrochemical sectors and will form part of Intertek’s Industry & Assurance division.NSL provides an opportunity to build on Intertek’s existing analytical and asset integrity management capabilities through the provision of high quality NDT services and direct access to a database of more than 700 NDT technicians. Desert NDT Acquires Midwest Inspection Services ODESSA, TX—Expanding its footprint in the midstream inspection and integrity services market, Desert NDT, LLC has acquired the assets of Midwest Inspection Services L.P., of Perryton, TX. This is Desert’s first purchase since receiving a majority investment from private equity firm Sterling Partners in March. Financial terms of the purchase were not disclosed. Midwest Inspection Services has provided a variety of NDT services to midstream oil and gas customers for more than 30 years. The acquisition of Midwest extends Desert’s service territory into Colorado and Nebraska. It also deepens Desert’s presence in the Texas Panhandle region, South Texas and western Oklahoma. The combined company will employ about 500 people. Midwest employs more than 200 people and operates four locations, including Perryton and Pharr, TX, Elk City, OK, and Brighton, CO. Its services encompass industrial radiography, ultrasonics, magnetic particle inspection, liquid penetrant inspection and certified welding inspection. David Ezzell and his father have been co-owners of Midwest Inspection Services since 1985. Ezzell will continue to oversee operations for Midwest’s locations. “With the addition of Midwest Inspection Services, Desert NDT is creating a powerful inspection and integrity services footprint across the country’s leading oil-and-gas production regions,” says Doug Frey, CEO of Desert NDT. “Desert now offers services across 10 states through 15 locations, including a new office established in Bismarck, ND, to service the strategically important Bakken Shale play.” Alan Macksey, a Sterling Partners managing director, noted that sharply rising U.S. oil and natural gas production has boosted demand for reliable nondestructive testing services for pipelines and midstream infrastructure.“Desert NDT’s acquisition of Midwest is consistent with the strategy behind our initial investment in the business,” he says. “We back strong companies in growing industries, and Desert NDT is an emerging leader in midstream inspection and integrity services.” Proceq SA Hires NDT Testing Authority Malcolm K. Lim SCHWERZENBACH, SWITZERLAND— Proceq SA welcomes Malcolm K. Lim as general manager of technical and application services. Lim is a world-renowned applications engineer, author and lecturer in the concrete testing arena, bringing years of hands-on, application-oriented expertise to the Proceq team. Proceq will benefit from Lim’s extensive expertise in the areas of technical consulting for NDT testing applications, product research and development, and litigation consulting. “Within a niche industry peopled almost exclusively by specialists, Malcolm stands out with a unique blend of 25 years rock-solid hard-earned NDT experience and an honest passion to create a lasting legacy for future NDT specialists,” says Oliver Oh, CEO of Proceq. Lim’s areas of expertise include: • Structural evaluation using NDT techniques including Impulse Radar, Impulse Response, Impact-Echo, Optical Fiberscope, Infrared Thermography and Ultrasonic Testing; • Laboratory examination and testing of construction materials; • Corrosion assessment of reinforced concrete structures; • Nondestructive evaluation of reinforced concrete in bridges, roadways, parking garages, high and low rise buildings, pipeline and tunnels; and • Providing expert witness testimony on nondestructive testing and materials in litigation cases.
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