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Shelf life of an o ring

It may seem a surprising topic of conversation, but when it comes to o rings and seals, it's important to note that they do have a shelf life, which, if not monitored and regularly checked, can affect their quality and overall performance.  How and where you store...

What are Encapsulated O-Rings?

When discussing the various o-ring options on offer, you might hear encapsulated o rings being discussed. This type of o-ring offers many advantages to manufacturers, but you’ll want to ensure you understand its proper application before purchasing...

Everything You Need to Know About Large O-Rings

Large O-rings, which are often referred to as giant o-rings, are used in a wide variety of applications. They are primarily needed for jobs where heavy machinery or equipment are used, but you’ll find there are a variety of options on the market when choosing large...

How to Avoid Pipeline Flange Corrosion

Our team is all too aware of the risks of corrosion, but it’s something that you can work to avoid in your home and workplace. Preventing corrosion isn’t always an easy task, which is why it’s such a common problem within buildings in the UK. Visit our homepage for...

O-rings suitable for the pharmaceutical industry

O rings are widely used across various industries to support a variety of different pieces of equipment and applications.  They provide an essential function and are ultimately moulded and manufactured to ensure they provide a continually high level of quality through...

The Best Chemical Resistant Gaskets for Sulfuric Acid

If you are using sulfuric acid on a regular basis within your industry, you might be aware of how corrosive it can be. While it can be useful for dyes, explosives, fertilisers, and many more applications, finding a chemical resistant gasket can often be one of the...

Different elastomers for o rings and various applications

An elastomer is a primary raw material used for most o rings. They are typically manufactured as gum rubber or manufactured synthetically, and surprisingly today, there are approximately over 32 different synthetic rubbers now available.  Elastomer compounds will...

Spiral wound gasket thickness – what’s best?

It is often recommended that using a thinner gasket type/material will result in better sealing performance.  Why?  Because thinner gaskets tend to require much less gasket stress to provide applications with the perfect seal, they also have an excellent response to...

Choosing the correct oil seal application

Choosing and using the proper sealing devices within oil and gas applications can be vital when preventing dirt, dust, water, and other debris from potentially getting inside and contaminating products.  Of course, all rubber materials and seals will provide a range...

Nitrile rubber, NBR, and Buna-N – how well do you know your o ring materials?

A widely used elastomer, Nitrile, Buna-N, or NBR rubber, are all oil and fuel resistant and provide a great level of strength, making them a popular material for seals across various industries.  Suitable for a range of applications, this versatile rubber material,...

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 

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. 

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.

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  

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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