High Nitrile Rubber, 75-85 °IRHD. High acrylonitrile (ACN) content (38%). Copolymer of acrylonitrile and butadiene. ASTM designation = NBR. ISO designation = NBR. British Gas Specification BGC/PS/LC6 Class E, approval ref.: 71/6.11.iv. MSL lab code 2.R. Also meets British Standard BS2494 Type G. Applications: Elastomeric seals for use in pipelines carrying manufactured or natural gas at operating temperatures of -5° to +40°C and pressures up to 7 bar. |