Asme b16.20A- - Metal Gasket For Piping Flange (American

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The centerline of the hole shall be located at the midpoint of dimension C. 015. OZ, -0. OZO. 004 within these tolerances. 004 within these tolerances. 20-1998 FOR TABLE 6 PIPE SIZES FOR TYPE RX RING GASKETS SUITABLE FOR REFERENCED STANDARDS Pressure Classes API 68 Ring Number RX-20 RX-23 RX-24 RX-25 RX-26 RX-27 RX-31 RX-35 RX-37 RX-39 RX-41 RX-44 RX-45 RX-46 RX-47 RX-49 RX-50 RX-53 RX-54 RX-57 RX-63 RX-65 RX-66 RX-69 RX-70 18 20 RX-73 RX-74 RX-82 RX-84 RX-85 RX-86 RX-87 RX-88 RX-89 RX-90 15 RX-91 RX-99 (2) RX-201 RX-205 ...

Larger bores must be checked individually. (4) There are no Class 900 flanges in NPS 50 through 60. 47 (2) (2) (2) (2) (2) (2) GENERAL NOTE: This table shows the maximum bore of flanges for which the spiral-wound gasket dimensions shown in Table 11 are recommended, considering the tolerances involved, the possibility of eccentric installation, and the possibility that the gasket may extend into the assembled flange bore. NOTES: (1) Inner rings are required for Class 900 gaskets, NPS 26 through NPS 48 (see para.

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