... seals R11-R105 *accord with API 6A ASME B16.20&ISO9001:2000 *pipeline and valve fittings *sell well at ... -R1053. application standard :ASME B 16.20, API 6A4. mainly used for:high-temperarure,high-presure ... ring joint gaskets(RTJ) in China, including octagonal and oval gaskets with R, RX, BX, IX series ... , our products comply with ASME B16.20 standard and API spec 6A .Moreover, we could supply gaskets as ...