Carbon Fiber Manufacturing
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For carbon fiber manufacturing, the use of nitrogen or argon to provide an inert atmosphere is often critical to the manufacturing process. A thorough understanding of the overall operational requirements allows a nitrogen supply system to be properly sized to provide reliability in meeting production schedules and product quality, while also ensuring safety in the use of industrial gases. Our applications engineers can work with you to understand your manufacturing process and recommend improvements that can help you optimize gas use and improve product quality.
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Yes, leaks in any pressurized high-purity gas line can cause intermittent oxidation. There are several possible causes. One is through retrodiffusion—the movement of impurities from the surrounding air to a high-pressure, low-impurity gas houseline. This is driven by concentration gradients, not pressure gradients, and is aggravated by changes in flow rate, pressure or piping temperature.
Air Products industry specialists can help you determine the cause of your problem. Since the oxidation is intermittent, you’ll need to continuously monitor your nitrogen houseline for leaks with a trace oxygen analyzer. For combustible gas lines, a combustible gas sniffer can also be used. Once impurities are found, the source of the leak can be identified using various techniques, including soap bubble testing, static pressure testing or helium mass spectrometry. Leaks often occur in weld cracks, mechanical joints, valve packing and loose fittings.