Buralloy
Ring Type Joint 2961

Buralloy
Ring Type Joint 2961

Buralloy <br/>Ring Type Joint 2961

Buralloy
Ring Type Joint 2961

Features

Buralloy Ring Type Joints 2961 are manufactured according to ASME B16.20 standards and API specification 6A and 17B. Careful control of all manufacturing processes and sealing action through metal-to-metal contact ensure correct surface hardness to offer sealing without damaging flange connections. These metallic gaskets are also commonly used on extremely high pressure valves and pipe work assemblies, along with some high integrity pressure vessel joints. Buralloy Ring Type Joints 2961 are used in oil fields on drilling and completion equipment as well as in downstream refinery applications.

Advantages

  • Excellent sealing through metal-to-metal contact
  • Suitable for extreme pressure and temperature requirements
  • Certificated quality (e.g. surface hardness)

Operating range

ASME B16.47 series A/B (ANSI B16.5): Class 150
ASME B16.20 (API 6A): Class 2,000

Corrosion resistance is dependent upon the choice of ring material.

Materials

RTJ's are available in soft iron, 304 and 316 stainless steels as standard. Other materials are available on request.

Standards and approvals

All ring type joints are manufactured according to API standards, thereby providing certified reliability.

Functional description

Under axial compressive load, ring type joints plastically deform and flow into the irregularities of the flange groove. Since the load bearing area of the ring type joint is relatively small, very high surface stresses result between the sealing faces of the ring type joint and the groove. These stresses are further increased on the Style RX and BX rings which allow very high internal pressures to be sealed. Since ring type joints are solid metal, their recovery characteristics are poor. The seal is maintained by the action of axial load upon the gasket.

Forms of supply

RTJ’s are available to suit all ASME and DIN flanges from stock – ½” to 36” and 15mm to 900mm. Larger size and special requirements are available to order. RTJ's are available in all sizes in Type "R", "RX, "BX" profiles.



Product variants

Buralloy Ring Type Joint 2961/R
Style R ring type joints are manufactured on oval (2962/R) and octagonal profiles (2961/R).
Both styles are interchangeable in the modern flat bottomed groove.
Octagonal profile joints are interchangeable on flat bottomes groove flanges which have a 23 degree angle groove wall
Style R ring type joints are designed to seal pressures up to 6,250 PSI (425 bar) in accordance with ASME B 16.5
ratings and up to 5,000 PSI (340 bar) in accordance with API 6A pressure ratings.

Buralloy Ring Type Joint 2961/RX
Designed for pressures up to approx. 10,000 psi (700 bar). This is self-sealing that uses a pressure-energised effect.
The Style RX ring type joint is manufactured in accordance with API 6A and ASME B 16.20, to suit API 6B and ASME B 16.5 flanges.
The Style RX is designed to fit the modem 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 (425 bar) in accordance with ASME B16.5 pressure ratings, and up to 5,000 PSI (340 bar) 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.
Buralloy Ring Type Joint 2961/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 pressure equalization each side of the sealing faces. On assembly, metal to metal contact 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 (1,360 bar) in accordance with API 6A pressure ratings.
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 equipment.