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Measuring Cast Iron Wall Thickness with the PosiTector UTG CLF

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The DeFelsko PosiTector UTG CLF ultrasonic wall thickness gauge uses proven ultrasonic technology to quickly and accurately measure the wall thickness of cast iron and other attenuative materials.

Why measure cast iron thickness?

Monitoring the wall thickness of cast iron is a key factor in ensuring consistent quality, controlling manufacturing material costs, and reducing the potential for premature failure. Widely used in the manufacture of pipes, electrical and hydraulic fittings, automotive parts, hand tools, and cookware, cast iron remains a popular material for products with complex shapes that are easier to cast than machine to shape. Compared with steel, cast iron has a lower melting point, provides superior vibration dampening, wear resistance and compressive strength, and is less reactive with mould materials making it a more economical option. Additionally, the physical properties of cast iron can be easily changed by altering the cooling rate and composition. Depending upon its composition, cast iron is classified as grey cast iron, white cast iron, malleable cast iron, or ductile cast iron, with each type having a different appearance and unique performance characteristics.

How to non-destructively measure the thickness of cast iron and other materials

ASTM E797—“Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method” details the method used to non-destructively measure the thickness of cast iron and other materials. Owing to its internal structure and coarse grain size, cast iron can challenge typical ultrasonic wall thickness instruments utilizing a 5 MHz transducer. The PosiTector UTG CLF is equipped with a specialized, 2.25 MHz dual-element transducer, making it highly effective for accurately measuring the wall thickness of flat and curved cast iron products. The PosiTector UTG CLF includes a proprietary algorithm which distinguishes back wall reflections from grain noise (reflections) found in cast materials. Providing measurement accuracy of ± 0.001” (± 0.03 mm), the PosiTector UTG CLF is also ideal for measuring the effects of corrosion or erosion on cast iron which is an essential component of maintaining safe and economical operation of infrastructure systems.

Benefits of the PosiTector UTG CLF

Generating professional cast iron inspection reports from the PosiTector UTG CLF is quick and easy. Simply connect the gage to a computer using the supplied USB cable. View reports directly from the PosiTector using a standard web browser or download measurements to the powerful PosiSoft Desktop software. Easily add images, notes, and other relevant inspection information to reports. See the PosiSoft Solutions page to learn more.

Performing cast iron wall thickness inspection in accordance with ASTM E797 is essential to ensuring quality control, minimizing waste, and maintaining the safety of infrastructure systems. Cast iron products that do not meet thickness requirements can fail in use resulting in costly repairs, injury, or environmental damage. The PosiTector UTG CLF is an ideal choice for accurately measuring the thickness of cast iron.

More information regarding the PosiTector UTG CLF Ultrasonic Thickness Gage is available on our PosiTector UTG page.

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