Can the API sealing ring, carbon steel, type R withstand pressures up to 700 bar and temperatures from -40Â°C to +500Â°C in flange groove connections?

Yes. The API sealing ring, carbon steel, type R is designed for groove-type flange connections and, per the provided specification, is suitable for high-pressure and high-temperature service. Its octagonal cross-section gives improved sealing integrity versus oval designs. Material: carbon steel. Working pressure: up to 700 bar. Operating temperature range: â40Â°C to +500Â°C. Therefore it can withstand pressures up to 700 bar and temperatures from â40Â°C to +500Â°C in flange groove connections, provided the mating flanges and system components are compatible with these limits and installation follows the manufacturerâs machining and assembly requirements.

Does the API sealing ring, carbon steel, type R require special flange groove machining for reliable sealing at high pressure and temperature?

Yes. The API sealing ring, carbon steel, type R is designed for use with specially machined flanges that include a matching groove. Reliable sealing at the stated high pressures (up to 700 bar) and temperatures (-40Â°C to +500Â°C) requires that the flange groove be machined to the correct dimensions and tolerances specified for the octagonal cross-section ring. Proper groove geometry ensures full contact, prevents extrusion, and maintains sealing integrity under thermal and pressure loads. Follow the detailed ring dimension specifications and recommended flange-groove machining tolerances for safe, reliable operation.

Is the API sealing ring, carbon steel, type R suitable for repeated thermal cycling between -40Â°C and +500Â°C?

Yes. The API sealing ring, carbon steel, type R is specified for an operating temperature range of -40Â°C to +500Â°C and for working pressures up to 700 bar. Based on that specification, it is suitable for use within that temperature window, including repeated thermal cycling between -40Â°C and +500Â°C, provided the following conditions are met: - The installation, flange machining, groove dimensions, and seating match the producerâs detailed dimensions and tolerances (octagonal cross-section requires correct groove geometry to ensure reliable sealing and to avoid localized stress concentrations). - The carbon steel grade used is compatible with the intended thermal cycling in terms of mechanical properties, fatigue resistance and thermal expansion; verify metallurgical specifics and heat treatment from the supplier when cyclic loads are frequent. - The assembly procedures, bolt preload and gasket mating surfaces are controlled to prevent creep, relaxation or loss of preload at high temperature excursions. - Media compatibility and any corrosive environment effects at elevated temperatures are assessed (carbon steel may require protective measures or coatings if corrosive species are present). - If cycles are rapid, extreme in number, or involve thermal shock, perform validation testing (or request supplier data on cyclic performance and fatigue life). In summary: the productâs stated operating temperature range indicates suitability for repeated cycling between -40Â°C and +500Â°C, but confirm material grade, flange/groove conformity, assembly practice, media compatibility and, for demanding cyclic regimes, supplier validation or testing.

API sealing ring, carbon steel, type R

Additional information

Steel sealing ring with an octagonal cross-section type R designed for connecting and sealing specially machined flanges with a groove. The octagonal cross-section ring provides greater sealing integrity than an oval cross-section ring. Used in connections for high pressures and temperatures. Detailed information on the dimensions of the ring is attached. Material: carbon steel. Working pressure: up to 700 bar. Operating temperature: from -40°C to +500°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HL-RO-020	Seal ring type R 20, carbon steel	-	-	In stock	Enquiry
HL-RO-023	Sealing ring type R 23, carbon steel	-	-	In stock	Enquiry
HL-RO-024	Sealing ring type R 24, carbon steel	-	-	In stock	Enquiry
HL-RO-026	Sealing ring type R 26, carbon steel	-	-	In stock	Enquiry
HL-RO-027	Sealing ring type R 27, carbon steel	-	-	In stock	Enquiry
HL-RO-031	Sealing ring type R 31, carbon steel	-	-	In stock	Enquiry
HL-RO-035	Seal ring type R 35, carbon steel	-	-	In stock	Enquiry
HL-RO-037	Sealing ring type R 37, carbon steel	-	-	In stock	Enquiry
HL-RO-038	Sealing ring type R 38, carbon steel	-	-	In stock	Enquiry
HL-RO-039	Sealing ring type R 39, carbon steel	-	-	In stock	Enquiry
HL-RO-041	Sealing ring type R 41, carbon steel	-	-	In stock	Enquiry
HL-RO-044	Sealing ring type R 44, carbon steel	-	-	In stock	Enquiry
HL-RO-045	Sealing ring type R 45, carbon steel	-	-	In stock	Enquiry
HL-RO-046	Sealing ring type R 46, carbon steel	-	-	In stock	Enquiry
HL-RO-047	Sealing ring type R 47, carbon steel	-	-	In stock	Enquiry
HL-RO-049	Sealing ring type R 49, carbon steel	-	-	In stock	Enquiry
HL-RO-050	Seal ring type R 50, carbon steel	-	-	In stock	Enquiry
HL-RO-051	Sealing ring type R 51, carbon steel	-	-	In stock	Enquiry
HL-RO-053	Sealing ring type R 53, carbon steel	-	-	In stock	Enquiry
HL-RO-054	Seal ring type R 54, carbon steel	-	-	In stock	Enquiry
HL-RO-057	Seal ring type R 57, carbon steel	-	-	In stock	Enquiry
HL-RO-063	Seal ring type R 63, carbon steel	-	-	In stock	Enquiry
HL-RO-065	Sealing ring type R 65, carbon steel	-	-	In stock	Enquiry
HL-RO-066	Seal ring type R 66, carbon steel	-	-	In stock	Enquiry
HL-RO-069	Sealing ring type R 69, carbon steel	-	-	In stock	Enquiry
HL-RO-070	Seal ring type R 70, carbon steel	-	-	In stock	Enquiry
HL-RO-073	Sealing ring type R 73, carbon steel	-	-	In stock	Enquiry
HL-RO-074	Sealing ring type R 74, carbon steel	-	-	In stock	Enquiry

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Steel sealing ring with an octagonal cross-section type R designed for connecting and sealing specially machined flanges with a groove. The octagonal cross-section ring provides greater sealing integrity than an oval cross-section ring. Used in connections for high pressures and temperatures. Detailed information on the dimensions of the ring is attached. Material: carbon steel. Working pressure: up to 700 bar. Operating temperature: from -40°C to +500°C.