The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Inspection of unpiggable pipeline becomes one of major issues in the gas pipelines industry. Remote field eddy current testing (RFECT) has strong potential for inspecting unpiggable pipelines among the various NDE methods. Thus, in this study, design of RFECT system including driving coil, sensing coil and passive scanning module and intial experimental results obtained from fabricated one-bed testing...
This paper introduces a MFL system developed by a research project, which has been being conducted by KOGAS and initiated in 2011, to develop ILI (In-Line Ispection) Robot named “PIBOT” for the inspection of 16” to 14” unpiggable natural gas pipelines. All elements and functions in the proposed MFL (Magnetic Flux Leakage) system were designed to minimize friction between magnetizer and pipe wall and...
A defect which is axially oriented with small size is hard to detect in conventional system. CMFL (Circumferential Magnetic Flux Leakage) type PIG (Pipelines Inspection Gauge) in the NDT (Nondestructive Testing), is operated to detect this defect called axially oriented cracks in the pipe. It is necessary to decompose the size and shapes of cracks for the maintenance of underground pipelines. This...
Among the nondestructive testing methods, the MFL(Magnetic Flux Leakage) PIG(Pipelines Inspection Gauge) is especially suitable for testing pipelines because the pipeline has high magnetic permeability. MFL PIG showed high performance in detecting the metal loss and corrosions. However, MFL PIG is difficult to detect the crack which occurred by exterior-interior pressure difference in pipelines and...
We investigated an optimal condition for void-free Cu filling in trench and TSV according to variation of plating DC current density. The copper deposit growth mode in and around the trench (width 100 µm and AR 1) was measured. The deposition rate of top layer on trench was similar to the measured Cu deposition rate on the plane wafer. However, the deposition rate in Cu electroplating was different...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.