ASME Code, TEMA and API Facts Archives - Ward Vessel and ExchangerWard Vessel and Exchanger

Non-Destructive Testing Methods: Positive Material Identification (PMI)

Posted on September 14, 2021

Positive material identification (PMI) ensures that the components and welds in a unit are actually the correct materials. Following proper procedures for material ordering, receiving, and traceability should prevent any…

Non-Destructive Testing Methods: VISUAL INSPECTION

Posted on August 12, 2021

Visual Inspection (VT) is the oldest and most basic method of inspection. It is the process of looking over a piece of equipment using the naked eye to look for flaws. It…

Non-Destructive Testing Methods: Hardness Testing

Posted on July 8, 2021

Non-Destructive Testing Methods: Hardness Testing This method is used to measure the hardness of base materials, welds, or heat affected zones around welds. Hardness measurements are useful to evaluate material properties such as…

Non-Destructive Testing Methods: Liquid penetrant testing (PT)

Posted on June 11, 2021

Like magnetic particle testing, this is a surface-only inspection method that can find imperfections such as cracks, surface porosity, seams, laps, etc. Unlike MT, it can be used on magnetic…

Non-Destructive Testing Methods: Eddy Current Testing

Posted on May 6, 2021

Eddy current testing (ECT) is a procedure commonly used to inspect heat exchanger and boiler tubing. This method uses the principals of electromagnetic induction to detect flaws or wall loss…

Non-Destructive Testing Methods: Ultrasonic Testing – Part 2

Posted on April 8, 2021

We previously discussed how straight beam ultrasonic testing (UT) can be used for inspection and thickness measurement of plates and other flat objects. Welds cannot usually be inspected with straight…

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