Type R ring gasket dimensions and tolerances ASME B16.20
used with RTJ flanges ASME B16.5 and B16.47 series A
General notes:
(a) All dimensions are in millimeters.
(b) Tolerances:
(b) 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