Dimensions & Tolerances
Type R Ring Gaskets ASME B16.20
to be used with RTJ flanges ASME B16.5 & B16.47 series A
Oval and Octagonal Type R ring gaskets

ASME B16.5

General notes:

All dimensions are in millimeters.

Tolerances:

  • P = average pitch diameter of ring ±0.18
  • A = width of ring ±0.20
  • B & H = height of ring +1.3. -0.5
    Variation in height throughout the entire circumference of any given ring shall not exceed 0.5 within these tolerances
  • C = width of flat on octagonal ring ±0.20
  • R1 = radius in ring ±0.5
  • 23 deg = angle ±0 deg 30 min
  • R-30 = for lapped joint only

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