Petroleum >121°C/250°F, also known as crude oil, is a flammable hydrocarbon liquid used in the production of fuels, lubricants, and various petrochemical products. It is composed of a mixture of hydrocarbons and is most commonly used as a fuel, lubricant, and chemical feedstock. Common uses for crude oil include use as a fuel for transportation, as a lubricant for machinery, and as a feedstock for the petrochemical industry.
When rubber is exposed to crude oil at temperatures above 121°C/250°F, the most common type of failure occurs when the rubber material becomes brittle and cracks due to the breakdown of its molecular structure. Additionally, the rubber may become hard and swollen, its tensile strength and elongation properties may decrease, and its flexibility may be reduced, which can lead to premature failure of the rubber seal.
HNBR, or hydrogenated NBR, is created by modifying the properties of NBR to increase the materials resistance to ozone, many chemicals, heat, aging, and abrasion. Like NBR, HNBR still holds onto its resistance to oils and fuels.
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