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Welcome to the Next Generation of Sealing Technology
Ring Type Joints
The ring type joint was initially developed for use in the petroleum industry, where high pressure/temperature appli-
cations necessitated the need for a high integrity seal. They are mainly used in the oil field on drilling and comple-
tion equipment. Ring type joints are also commonly used on valves and pipework assemblies, along with some high
integrity pressure vessel joints.
Style R
The Style R ring type joint is manufactured in accordance with API 6A and ASME
B16.20, to suit API 6B and ASME B16.5 flanges.
Style R ring type joints are manufactured in both oval and octagonal config-
urations. Both styles are interchangeable on the modern flat bottom groove, how-
ever only the oval style can be used in the old type round bottom groove.
Style R ring type joints are designed to seal pressure up to 6,250 psi in accor-
dance with ASME B16.5 pressure ratings and up to 5,000 psi in accordance with
API 6A pressure ratings.
Style RX
The Style RX ring type joint is manufactured in accordance with API 6A and ASME
B16.20, to suit API 6B and ASME B16.5 flanges.
The Style RX is designed to fit the modern flat bottom groove, and is inter-
changeable with the standard Style R ring type joint. However, since the Style RX
is significantly taller than a Style R, larger flange make up distances will result.
Style RX ring type joints are designed to seal pressures up to 6,250 psi in
accordance with ASME B16.5 pressure ratings, and up to 5,000 psi in accordance
with API 6A pressure ratings. Selected sizes incorporate a pressure passage hole to
allow for pressure equalization each side of the sealing faces.
Style BX
The Style BX ring type joint is manufactured in accordance with API 6A.
All BX ring type joints incorporate a pressure passage hole to allow for pres-
sure equalization each side of the sealing faces. On assembly, metal to metal con-
tact of the flange faces is achieved. The Style BX is not interchangeable with any
other style, and is only suited for API 6BX flanges. Style BX ring type joints are
designed to seal pressure up to 20,000 psi in accordance with API 6A pressure rat-
ings.
Styles SRX and SBX
Styles SRX and SBX are derived from Styles RX and BX, and are produced in line
with the API Standard 17 D for use on subsea wellhead and Christmas tree equip-
ment.
Style R
Style RX
Style BX
Oval
Octagonal