NEW

RTJ Flanges vs RF Flanges

Ring type joint and raised face flanges are two of the most popular options in the industry today. When we talk about these types of flanges and their differences, we are referring to choosing the best type of flange to create an effective seal. Today we’re going to...

Flange Faces

As you start to consider purchasing flanges or gaskets, you’ll see a variety of terms used that you may not have come across before. Flange faces are the surface area that will receive the gasket, allowing them to come together to create a seal when put under...

Octagonal Ring Type Joints

A ring-type joint is a metallic ring that is machined to sit between two mating surfaces, where it will be compressed to provide a high-quality and reliable seal. Ring-type joints are vital components in various applications across multiple industry sectors,...

Blind Flange vs Blank Flange

Small pieces of mechanical equipment flanges continually play a vital role across numerous industries and applications. In essence, we use flanges to connect pipes to each other, with flanges also found in valves and specific application fittings too. Due to the...

Types of Flanges

Businesses in a variety of industries rely on flanges to join pipes or components together or to keep equipment secured to a surface. When it comes to choosing the best types of flange for your processes, you’ll want to take the time to research the different options...

Threaded Flange

Threaded flanges are probably the most recognisable of all flanges due to their screw thread design that is used to connect it to the pipe. Threaded flanges, also known as screwed flanges (for obvious reasons), require a male and female thread to create a connection...

Slip On Flange

A slip-on flange can also be known as a hubbed flange, which, as the name suggests, has a hub with a very low profile. Why is this important? Because this type of ring type joint gasket has an internal diameter larger than the connecting pipe, allowing you to slide it...

Weld Neck Flange

Also known as tapered hub flanges or high hub flanges, weld neck flanges are a specific type of gasket with a protruding ridge and long neck used to connect pipework and provide you with a high-quality seal. Weld neck flanges, in particular, are a popular choice when...

Nitrile vs Viton® – What is the Difference?

As you start to make a decision about what type of O-rings to purchase for your business, you might wonder what material is the most suitable for your unique needs. Every business operation has different requirements for their O-rings, such as the temperature,...

Aflas vs Viton

When it comes to choosing O ring suppliers in the UK, you’ll find that there are a wide range of materials on offer for you to choose from. Many people find that the options can seem quite overwhelming, with some materials having similar properties but offering...

See our latest catalogue for all the services we offer.

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
Contact Us
close slider