The BX type RTJ gaskets are manufactured in accordance with API 6A and are suitable for use in high pressure API 6BX flanges.
The gaskets form a metal to metal seal on assembly and the efficiency improves as internal pressure increases. All BX sizes have a pressure relief hole to equalise pressure across sealing faces.
SRX and SBX RTJ gaskets to API 17D for subsea applications.
IX rings for compact flanges
Other non-standard styles of metal rings are also available like combination, IX, Delta and Lens to customer specifications