Ring Type Joint Gaskets

Product Specification:

Stainless Steel Ring Type Joint Gaskets : SS 304 / 304L / 316 / 316L / 321 / 347 / 904L

High Nickel Ring Type Joint Gaskets : MONEL 400 / K500 / INCONEL 600 / 625 / 800 / 825

Ring Joint Gaskets Types

Style R
  • Available in oval and octagonal cross-sections
  • Style R gaskets are interchangeable on modern octagonal flat bottom grooved flanges
  • Standard sizes of Style R gaskets are manufactured in accordance with ASME B16.20 and API 6A specifications
Style RX
  • The Style RX ring joint has a unique self-sealing action. The outside bevels of the ring make the initial contact providing a seal against the grooves outer surfaces. As the internal pressure increases, so does the gasket loading stress against the groove thus improving the gaskets sealing characteristics
  • Design features of the Style RX gasket make it more resistant to shock load, test pressure shock and drilling vibration
  • Style RX ring joints are completely interchangeable with standard Style R groove designs. Care should be taken when interchanging these styles as RX gaskets are taller and will add length to the finished assembly
Style BX
  • Style BX gaskets have a pitch diameter slightly larger than the groove pitch diameter. This allows for initial contact to be made on the outside of the ring, pre-loading the gasket which creates a pressure energized seal
  • All Style BX gaskets incorporate a pressure passage to enable trapped pressure to balance itself in the joint
  • Style BX ring joint gaskets can only be used with API BX flanges and are not interchangeable with style RX

Raised face flange gasket dimensions

Raised face flange gasket

NPS d1 d2
Class
150
Class
300
Class
400
Class
600
Class
900
1/2 21 48 54 54 54 64
3/4 27 57 67 67 67 70
1 33 67 73 73 73 79
1.1/4 42 76 83 83 83 89
1.1/2 48 86 95 95 95 98
2 60 105 111 111 111 143
2.1/2 73 124 130 130 130.2 165
3 89 137 149 149 149 168
3.1/2 102 162 165 162 162  
4 114 175 181 178 194 206
5 141 197 216 213 241 248
6 168 222 251 248 267 289
8 219 279 308 305 321 359
10 273 340 362 359 400 435
12 324 410 422 419 457 498
14 356 451 486 483 492 521
16 406 514 540 537 565 575
18 457 549 597 594 613 638
20 508 606 654 648 683 699
24 610 718 775 768 791 838

Identification of RTJ Gasket

GASKET MATERIALS BRINELL HARDNESS NUMBER (max) ROCKWELL B SCALE(max) TEMPERATURE LIMIT

oC

IDENTIFICATION
Soft iron 90 56 -60 to +400 D
Low carbon steel 120 68 -40 to +500 S
4-6% Chrome 1/2% molybdenum 130 72 -125 to +500 F5
410 Stainless Steel 170 86 -20 to +500 S410
304 Stainless Steel 160 83 -250 to +650 S304
316 Stainless Steel 160 83 -196 to +800 S316
347 Stainless Steel 160 83 -250 to +870 S347