Jeff Milligan Archives

By: Jason Van Velsor and Jeff Milligan

Our talented experts, using the latest technology and methods, deliver unmatched value, actionable information, and engineering knowledge for the management of your most critical assets.

Many of the penstocks used in the hydroelectric power industry have been in service for over 50 years. Often with older components, historical documents like, as-built drawings and proof of material composition no longer exist. This information is critical for inspection, repair and replacement decisions. SI has the expertise to assist hydro clients with everything from material verification, inspection, and fitness-for-service analysis to keep penstock assets in-service for many more years to come.

By: Jeff Milligan, Steve Gressler, and Allen Porter

Full Matrix Capture (FMC) and Total Focusing Method (TFM) have evolved over the past few years into NDE buzz words that warrant explanation and context for their proper and successful application. Structural Integrity (SI) is well vested and engaged in FMC and actively exploring the use of this technology where it enhances ultrasonic sensitivity and characterization to bring added value to our clients. An explanation of these technologies and what they mean to the future of ultrasonic inspection follows.

Phased Array Ultrasonic Testing (PAUT) has evolved significantly over the last 20+ years, with improvements and innovations in sensor design, signal processing, and data interpretation; however, the method by which PAUT is applied has remained relatively unchanged: Excite an array of transducer elements with predetermined time delays, called focal laws, and receive resulting reflections with the array of transducer elements,

News & Views, Volume 49 | Hydroelectric Penstock Inspection: Field NDE Services

News & Views, Volume 46 | The Newest Phased Array Ultrasonic Technique: Full Matrix Capture