*gaskets&seals R11-R105 *accord with API 6A ASME B16.20&ISO9001:2000 *pipeline and ... a leading specialized supplier of ring joint gaskets(RTJ) in China, including octagonal and oval gaskets with R, RX, BX, IX ... have certified API and ISO9001:2000, therefore, our products comply with ASME B16.20 standard and API spec 6A .Moreover, ... and drawings.Wenzhou Huahai Sealing Co.,LTD gaskets seal with API 6A