RTJ (Ring Type Joint)
A high-pressure flange face type using a metallic oval or octagonal ring gasket in a machined groove. Provides superior sealing at Class 900 and above. More expensive than raised-face and requires precise machining. Standard on high-pressure API 6D valves in Class 900–2500.
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Applicable Standards
Frequently Asked Questions
What is a RTJ (Ring Type Joint) in a valve?
A high-pressure flange face type using a metallic oval or octagonal ring gasket in a machined groove. Provides superior sealing at Class 900 and above. More expensive than raised-face and requires precise machining. Standard on high-pressure API 6D valves in Class 900–2500.
What materials are used for the RTJ (Ring Type Joint)?
RTJ (Ring Type Joint) material selection depends on the process fluid, operating temperature and pressure, and required corrosion resistance. Standard materials include carbon steel (A216 WCB/A105), austenitic stainless steel (SS316/316L), and corrosion-resistant alloys (Hastelloy C-276, Inconel 625, duplex stainless steel 2205/2507) for aggressive service. All materials must be certified with EN 10204 Type 3.1 MTCs traceable to the heat number.
What standards govern the design of the RTJ (Ring Type Joint)?
Valve component design is governed by ASME B16.34 for pressure-temperature ratings, API 600/602 for gate valves, API 609 for butterfly valves, and API 6D for pipeline valves, as applicable. Third-party inspection to these standards ensures compliance. Vajra Industrial Solutions supplies valves with full documentation packages including dimensional inspection records and material certificates.
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