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Rubber hose tube materials

Rubber elastomers such as Buna-N (NBR) or Neoprene (CR) are subject to aging. A slow chemical change occurs due to the natural depletion of antioxidants of the original blend. SAE AS1933 lists deleterious elements that should be controlled: oxygen ozone moisture high temperature (124 degrees F.) swelling agents such as fuel or solvents corrosive vapors and mechanical stress

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided is not intended to supercede or supplement the F.A.A. approved maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.