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Ring Type Joint Gaskets

Lone Star's Ring Type Joint (RTJ) Gaskets are precision machined, metallic sealing rings suitable for high pressure and high temperature applications. RTJ gaskets are designed to seal by "initial line contact" or wedging action between the mating flange and the gasket. By applying pressure on the seal interface through bolt force, the softer metal of the gasket flows into the micro-fine structure of the harder flange material, creating a very tight and efficient seal.

Lone Star RTJ gaskets are manufactured in accordance with API-6A and ASME B16.20 specifications and come in four basic profiles:

R-Oval - Ring Gasket

R-Octagonal - Ring Gasket

RX - Ring Gasket

BX - Ring Gasket

These basic shapes are used in a variety of applications with pressures up to 20,000 PSI. The dimensions are standardized and require specially grooved flanges by where a corresponding "R" or "BX" number is assigned for pipe size and pressure class for gasket identification.

To ensure cost effectiveness and reliability, Lone Star's CNC automation and state-of-the-art coordinate measuring systems provide reliable benchmarks for our on-going quality control operations.

Our finished goods inventory includes the following:

RTJ Type	Pressure Rating	API Standards	ASME Standards	Flanges	Sizes	Materials

R-Oval Ring Gasket	150 300 400 600 900 1500 2000 2500 3000 5000	API 6A	ASME B 16.20	API 6A ASME B16.5 MSS SP44 BS 1650	R11 R12 R13 R14 R16 R17 R18 R20 R23 R24 R26 R27 R31 R32 R35 R37 R39 R41 R44 R45 R45/46 R46 R47 R49 R50 R51 R52 R53 R54 R55 R57 R58 R60 R61 R62 R63 R65 R66 R67 R69 R70 R71 R72 R73 R74 R75 R77 R78 R79	304 316 347 410 Soft Iron-D Low Carbon Steel-S F-5 Hastalloy Monel Incone
R-Octagonal Ring Gasket	150 300 400 600 900 1500 2000 2500 3000 5000	API 6A	ASME B 16.20	API 6B ASME B16.5	R11 R12 R13 R14 R16 R17 R18 R20 R23 R24 R26 R27 R31 R32 R35 R37 R39 R41 R44 R45 R45/46 R46 R47 R49 R50 R51 R52 R53 R54 R55 R57 R58 R60 R61 R62 R63 R65 R66 R67 R69 R70 R71 R72 R73 R74 R75 R77 R78 R79	304 316 321 347 410 Soft Iron-D Low Carbon Steel-S F-5 Hastalloy Monel Inconel
RX Ring Gasket	150 300 400 600 900 1500 2000 2500 3000 5000	API 6A	ASME B 16.20	API 6B and ASME B16.5	RX201 RX205 RX210 RX20 RX23 RX24 RX25 RX27 RX31 RX35 RX37 RX35 RX37 RX39 RX41 RX41 RX44 RX45 RX46 RX47 RX49 RX50 RX53 RX54 RX57 RX63 RX65 RX66 RX69 RX70 RX73 RX74	304 316 347 410 Soft Iron-D Low Carbon Steel-S F-5 Hastalloy Monel Inconel
BX Ring Gasket	10000 15000 20000	API 6A	ASME B 16.20	API 6BX	BX150 BX151 BX152 BX153 BX154 BX155 BX156BX157 BX158 BX159 BX160 BX161 BX162 BX163 BX164 BX165 BX166 BX167 BX169	304 316 347 410 Soft Iron-D Low Carbon Steel - S F-5 Hastalloy Monel Inconel

* Lone Star's ring type joint gasket is designed to provide a high integrity seal for a variety of extreme temperature / pressure applications. Primarily used in Oil & Gas drilling and completion environments, all Lone Star RTJ gaskets are manufactured in accordance with the required API and ASME specifications.

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