33 CFR Part 155, Appendix A
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| Item | Description | Dimension |
|---|---|---|
| 1 | Outside diameter | 215 mm. (8 in.). |
| 2 | Inside diameter | According to pipe outside diameter. |
| 3 | Bolt circle diameter | 183 mm. (7 3⁄16 in.). |
| 4 | Slots in flange | 6 holes 22 mm. (7⁄8 in.) in diameter shall be equidistantly placed on a bolt circle of the above diameter, slotted to the flange periphery. The slot width is to be 22 mm. (7⁄8 in.). |
| 5 | Flange thickness | 20 mm. (3⁄4 in.). |
| 6 | Bolts and nuts | 6, each of 20 mm. (3⁄4 in.) in diameter and of suitable length. |
The flange must be of steel having a flat face, with a gasket of oilproof material, and must be suitable for a service pressure of 6 kg./cm.2 (85 p.s.i.).
The steel materials used must meet the material specifications of standard B16.5, Steel Pipe Flanges and Flanged Fittings of the American National Standards Institute. (See § 154.106 of this chapter.)
[CGD 75-124, 45 FR 7176, Jan. 31, 1980]