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How to Restore Damaged Rubber Seals: A Step-by-Step Guide

Seals, like anything, can deteriorate over time affecting the overall application, and if left untreated can lead to complete failure of the seal and more costly problems.  The good news is that you don’t always have to replace seals when they become damaged. In...
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Gasket vs Seal: What Is the Difference and Which Do You Need?

Let us start by saying:  All gaskets are seals, but not all seals are gaskets.  And yes, we know that they are very often grouped together and do indeed have similar functions; however, they are different, both in their characteristics and use.  With...
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Ring Type Joint vs Raised Face Flange: Key Differences and How to Choose

Within piping systems, valves, and vessels, it is critical that you choose the most appropriate flange, as these components affect safety, efficiency, and cost.  Two of the most common flange face types include raised face and ring type joint flanges. These two...
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Blind Flange vs Blank Flange: Key Differences and When to Use Each

Distinguishing between blind and blank flanges is a critical requirement for operational safety and efficiency within industrial applications such as pipe systems and networks.  These two terms, blank and blind, are often used interchangeably; however, it is...
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How Thick Should Gasket Paper Be?

Typical gasket paper thickness ranges from 0.15mm to 3.00mm, with many manufacturers following the principle that thickness follows flange condition and pressure.  Choosing the correct gasket sheet thickness should be decided...
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O Ring Colour Identification

Ensuring that tight seals are provided so no leaks occur and no contamination enters the application, correct o ring colour identification is essential.  These essential components are primarily used within water and gas distribution, the food...
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Choosing the right O-ring material for Hydraulic fluid applications

Choosing the appropriate O-ring material for hydraulic fluid is vital to prevent seal failure in applications and systems where leak prevention and contamination control are essential.  Each material type has its own set of unique properties and will...
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What you need to know about O Ring Lubricants

Choosing a compatible lubricant for a known O-ring material is essential to ensure the integrity and safety of the overall application/system. Enhancing an O-ring's performance, and as part of maintenance plans, lubricating is an essential element; however, with...
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Flange corrosion protection: How to identify, inspect, and prevent flange damage

It’s essential in any application that uses gaskets and seals that the right materials are chosen. Ensuring compatibility not only provides peace of mind that leaks are prevented, but by ensuring the correct material, you can also help to prevent excessive corrosion....
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Gaskets and sealing solutions for the brewing industry

Gaskets, a vital component in most industries when you’re looking to prevent leaks, seal in liquids, and avoid contamination, and the brewing industry is no exception. The brewing process involves a lot of chemicals and requires regular robust cleaning and...
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Specialist Sealing Products - PO Box 86 Bingley BD16 9AQ
CALL 01535 274 776

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Quality Ring Type Joints (RTJs)

Ring Type Joint (RTJ) Gaskets are precision machined, from a wide range of materials, determined by service conditions, and are suitable for high temperature and high pressure applications. 

General Market Sector Industry’s  include; 

Oil and Gas, Petrochemical, Petroleum Oil Field Drilling Equipment and Offshore Sub-Sea applications 

They come in a variety of shapes and sizes and are labelled as ‘Styles’.  Type R  – Oval, Type R – Octagonal, Type RX and Type BX complete the standard range of ‘Styles’ and are manufactured in accordance to API 6A, API 17D, ASME B16.20 or to customer specific requirements 

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Quality Ring Type Joints (RTJs)

STYLE R

These are manufactured in accordance with API  6A for heavy duty use in the Petroleum industry  particularly in oil field drilling equipment. Both types are interchangeable on octagonal type grooved flanges 

Ring Type Joints Style R Oval
Ring Type Joints Style R Octagonal
RX Ring Type Joint Drawing

STYLE RX

Suitable for ASME B16.5 Flanges up to 2500 LBS and API 6A type 6B Flanges can withstand pressures up to 5,000 psi. The RX Style is based upon the standard Style R, and will fit the same groove, but becomes energised when the assembly is pressurised thus improving the efficiency of the seal. 

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STYLE BX 

BX Gaskets are manufactured in accordance with ASME B16.20, API 6A and API  17D, a variant specifically for subsea applications. They are machined in a symmetrical shape ensuring flange face to face contact on both the inner and outer diameters and incorporate a pressure hole to give energized sealing up to 20,000 psi.

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BX Ring Type Joint Drawing
Ring Type Joint

The gasket material should be selected and determined to suit the service conditions. It is always recommended that the gasket material should be approximately 30 Brinell softer than the mating flange material to ensure sufficient deformation of the gasket, thus providing subsequent sealing force. 

The more common materials used are as stated in the table below  

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Material Reference Table
MATERIAL IDENTIFICATION MAXIMUM HARDNESS (BHN)
Soft Iron D 90
Low Carbon Steel S 120
F5 (4-6% Chrome – 1/2% Moly) F5 130
SS 304 S304 160
SS 316 S316 160
SS 321 S321 160
SS 347 S347 160
SS 410 S410 170
Alloy 600 N06600 200
Alloy 625 N06625 200
Alloy 800 N08800 200
Alloy 825 N08825 200
Hastelloy C-276 N10276 200
Duplex 31254 S31254 180
Duplex 31803 S31803 250
Monel 400 N04400 200
Titanium R50400 215
Type R Oval and Octagonal Ring Type Joint Gasket Dimensions In Accordance to ASME B16.20 / API 6A
ASME B16.5 FLANGES / ASME B16.20 API 6B FLANGES / API 6A (psi) PCD WIDTH RING HEIGHT
Ring No. 150 3/600 900 1500 2500 2000 3000 5000 (mm) (mm) OVAL (mm) OCT (mm)
R11 ½” 34.14 6.35 11.2 9.7
R12 ½” ½” 39.7 7.95 14.2 12.7
R13 ¾” ½” 42.88 7.95 14.2 12.7
R14 ¾” ¾” 44.45 7.95 14.2 12.7
R15 1” 47.63 7.95 14.2 12.7
R16 1” 1” 1” 34” 1” 1” 1” 50.8 7.95 14.2 12.7
R17 1.1/4” 57.15 7.95 14.2 12.7
R18 1.1/4” 1.1/4” 1.1/4” 1” 1.1/4” 1.1/4” 1.1/4” 60.33 7.95 14.2 12.7
R19 1.1/2” 65.1 7.95 14.2 12.7
R20 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 68.28 7.95 14.2 12.7
R21 1.1/4” 72.24 11.13 17.5 16
R22 2” 82.55 7.95 14.2 12.7
R23 2” 1.1/2” 2.1/16” 82.55 11.13 17.5 16
R24 2” 2” 2.1/16” 2.1/16” 95.25 11.13 17.5 16
R25 2.1/2” 101.6 7.95 14.2 12.7
R26 2.1/2” 2” 2.9/16” 101.6 11.13 17.5 16
R27 2.1/2” 2.1/2” 2.9/16” 2.9/16” 107.95 11.13 17.5 16
R28 2.1//2” 111.13 12.7 19.1 17.5
R29 3” 114.3 7.95 14.2 12.7
R30 3” 117.48 11.13 17.5 16
R31 3” 3” 3.1/8” 3.1/8” 123.83 11.13 17.5 16
R32 3” 127 12.7 19.1 17.5
R33 3.1/2” 131.78 7.95 14.2 12.7
R34 3.1/2” 131.78 11.13 17.5 16
R35 3” 3.1/8” 136.53 11.13 17.5 16
R36 4” 149.23 7.95 14.2 12.7
R37 4” 4” 4.1/16” 4.1/16” 3.1/2” 149.23 11.13 17.5 16
R38 4” 157.18 15.88 22.4 20.6
R39 4” 4.1/16” 161.93 11.13 17.5 16
R40 5” 171.45 7.95 14.2 12.7
R41 5” 5” 5.1/8” 5.1/8” 180.98 11.13 17.5 16
R42 5” 190.5 19.05 25.4 23.9
R43 6” 193.68 7.95 14.3 12.7
R44 5” 5.1/8” 193.68 11.13 17.5 16
R45 6” 6” 7.1/16” 7.1/16” 211.15 11.13 17.5 16
R46 6” 7.1/16” 211.15 12.7 19.05 17.5
R47 6” 228.6 19.05 25.4 23.9
R48 8” 247.65 7.95 14.3 12.7
R49 8” 8” 9” 9” 269.88 11.13 17.5 16
R50 8” 9” 269.88 15.88 22.22 20.6
R51 8” 279.4 22.23 28.6 26.9
R52 10” 304.8 7.95 14.3 12.7
R53 10” 10” 11” 11” 323.85 11.13 17.5 16
R54 10” 11” 323.85 15.88 22.22 20.6
R55 10” 342.9 28.58 36.51 35.1
R56 12” 381 7.95 14.3 12.7
R57 12” 12” 13.5/8” 13.5/8” 381 11.13 17.5 16
R58 12” 381 22.23 28.6 26.9
R59 14” 396.88 7.95 14.5 12.7
R60 12” 406.4 31.75 39.7 38.1
R61 14” 14” 14” 419.1 11.13 17.5 16
R62 14” 419.1 15.88 22.22 20.6
R63 14” 419.1 25.4 33.33 31.8
R64 16” 454.03 7.95 14.2 12.7
R65 16” 16.3/4” 16.3/4” 469.9 11.13 17.5 16
R66 16” 469.9 15.88 22.4 20.6
R67 16” 469.90 28.58 36.60 35.10
R68 18” 517.53 7.95 14.20 12.70
R69 18” 18” 533.40 11.13. 17.50 16.00
R70 18” 18” 533.40 19.05 25.40 23.90
R71 18” 533.40 28.58 36.60 35.10
R72 20” 558.80 7.95 14.20 12.70
R73 20” 20.3/4” 584.20 12.70 19.10 17.50
R74 20” 20.3/4” 584.20 19.05 25.40 23.90
R75 20” 584.20 31.75 39.60 38.10
R76 24” 673.10 7.95 14.2 12.7
R77 24” 692.15 15.88 22.4 20.6
R78 24” 692.15 25.40 33.30 31.80
R79 24” 692.15 34.93 44.50 41.40
R80 22” 615.95 7.95 14.29 12.70
R81 22” 635.00 14.30 20.64 19.10
R93 26” 749.30 19.05 25.40 23.90
R94 28” 800.10 19.05 25.40 23.90
R95 30” 857.25 19.05 25.40 23.90
R96 32” 914.40 22.23 28.58 26.90
R97 34” 965.20 22.23 28.58 26.90
R98 36” 1022.35 22.23 28.58 26.90
R99 8” 8” 234.95 11.13 17.46 16.00
R100 26” 749.30 28.58 36.51 35.10
R101 28” 800.10 31.75 39.68 38.10
R102 30” 857.25 31.75 39.68 38.10
R103 32” 914.40 31.75 39.68 38.10
R104 34” 965.20 34.93 44.45 41.40
R105 36” 1022.35 34.93 44.45 41.40
RX Ring Type Joint Gasket Dimensions In accordance to ASME B16.20 / API 6A
API 6B FLANGES / API 6A (psi) OD HEIGHT WIDTH
RING NO 2000 3000 5000 (mm) (mm) (mm)
RX20 1.1/2” 1.1/2” 1.1/2” 76.20 19.05 8.40
RX23 2” 93.27 25.40 11.91
RX24 2” 2” 105.97 25.40 11.91
RX25 3.1/8” 109.55 19.05 8.74
RX26 2.1/2” 111.91 25.40 11.91
RX27 2.1/2” 2.1/2” 118.26 25.40 11.91
RX31 3” 3” 134.54 25.40 11.91
RX35 3” 147.24 25.40 11.91
RX37 4” 4” 159.94 25.40 11.91
RX39 4” 172.64 25.40 11.91
RX41 5” 5” 191.69 25.40 11.91
RX44 5” 204.39 25.40 11.91
RX45 6” 6” 221.84 25.40 11.91
RX46 6” 222.25 28.58 13.49
RX47 8” 246.26 41.28 19.84
RX49 8” 8” 280.59 25.40 11.91
RX50 8” 293.36 31.75 16.66
RX53 10” 10” 334.57 25.40 11.91
RX54 10” 337.34 31.75 16.66
RX57 12” 12” 391.72 25.40 11.91
RX63 14” 441.73 50.80 27.00
RX65 16” 480.62 25.40 11.91
RX66 16” 457.99 31.75 16.66
RX69 18” 544.12 25.40 11.91
RX70 18” 550.06 41.28 19.84
RX73 20” 596.11 31.75 13.49
RX74 20” 600.86 41.28 19.84
RX99 8” 8” 245.67 25.40 11.91
RX201 1.3/8” 51.46 11.30 5.74
RX205 1.13/16” 62.31 11.10 5.56
RX210 2.9/16” 97.64 19.05 9.53
RX215 4.1/16” 140.89 25.40 11.91
BX Ring Type Joint Gasket Dimensions In accordance to ASME B16.20 / API 6A
API 6B FLANGES / API 6A (psi) OD HEIGHT WIDTH HOLE SIZE
RING NO 2000 3000 5000 10000 15000 20000 (mm) (mm) (mm) (mm)
BX150 1.11/16” 1.11/16” 72.19 9.30 9.30 1.5
BX151 1.13/16” 1.13/16” 1.13/16” 76.40 9.63 9.63 1.5
BX152 2.1/16” 2.1/16” 2.1/16” 84.68 10.24 10.24 1.5
BX153 2.9/16” 2.9/16” 2.9/16” 100.94 11.38 11.38 1.5
BX154 3.1/16” 3.1/16” 3.1/16” 116.84 12.40 12.40 1.5
BX155 4.1/16” 4.1/16” 4.1/16” 147.96 14.22 14.22 1.5
BX156 7.1/16” 7.1/16” 7.1/16” 237.92 18.62 18.62 3.0
BX157 9” 9” 9” 294.46 20.98 20.98 3.0
BX158 11” 11” 11” 352.04 23.14 23.14 3.0
BX159 13.5/8” 13.5/8” 13.5/8” 426.72 25.70 25.70 3.0
BX160 13.5/8” 402.59 23.83 13.74 3.0
BX161 16.3/4” 491.41 28.07 16.21 3.0
BX162 16.3/4” 16.3/4” 475.49 14.22 14.22 1.5
BX163 18.3/4” 556.16 30.10 17.37 3.0
BX164 18.3/4” 18.3/4” 570.56 30.10 24.59 3.0
BX165 21.1/4” 624.71 32.03 18.49 3.0
BX166 21.1/4” 640.03 32.03 26.14 3.0
BX167 26.3/4” 759.36 35.86 13.11 1.5
BX168 26.3/4” 765.25 35.86 16.05 1.5
BX169 5.1/8” 173.51 15.85 12.93 1.5
BX170 6.5/8” 6.5/8” 218.03 14.22 14.22 1.5
BX171 8.9/16” 8.9/16” 267.44 14.22 14.22 1.5
BX172 11.5/32” 11.5/32” 333.07 14.22 14.22 1.5
BX303 30” 30” 852.75 37.95 16.97 1.5
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