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Our urethane ring joint test gaskets (RTJU) are a non-damaging method to test and recertify ring type joint flanges. The uniquely shaped profile energizes the seal in the groove under pressure, retrofitting into R or BX ring type joint gasket grooves.

Under ideal flange, installation, and test conditions, customers enjoy the resiliency of our Bokure™ test gaskets, achieving more than a hundred tests with our R style and dozens of tests with our BX style. Available for classes 150#, 300#, 400#, 600#, 900#, 1500# and 2500#.


Our RTJUs are a cost-effective alternative to single-use metallic RTJs and rubber-coated RTJs available on the market. They are manufactured in-house from our Bokure™ urethane MU90. This material boasts exceptional characteristics, including remarkable pressure handling and rebound capabilities.

RTJU advantages:
  • Re-usable
  • Cost effective
  • Non-damaging method for testing your flanges
  • Rapid turnover for standard and non-standard groove sizes
  • Suitable for water and nitrogen pressure tests
  • General temperature range of -30°C to 110°C (-22°F to 230°F)

RTJUs are used in numerous critical applications across markets that uses ring type joint gasket, including:
  • BOP Control Valves
  • Wireline Control Valves
  • Wellheads

*Please note that bolt up procedures do not change when using RTJUs.