Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Table 4-20<br />
Oval and Octagonal Ring Gasket<br />
Interchange Table for API Type 6B <strong>Flan</strong>ges<br />
with Old Nominal Pipe Sizes<br />
Old 720 Old Old<br />
Nominal 960 Nominal Nominal<br />
<strong>Flan</strong>ge 2,000 <strong>Flan</strong>ge <strong>Flan</strong>ge<br />
Size 3,000 Ibs Size (in.) 5,000 Ibs Size (in.) 2,900 Ibs<br />
Ring No. Ring No. Ring No.<br />
R RX R RX R RX<br />
1 R-16 1 R-16<br />
11/4 R-18 11/4 R-18<br />
lV2 R-20 RX-20 11/2 R-20 RX-20<br />
2 R-23 RX-23 2 R-24 RX-24<br />
21/2 R-26 RX-26 21/2 R-27 RX-27<br />
3 R-31 RX-31 3 R-35 RX-35<br />
31/2 R-34 RX-34 31/2 R-37 RX-37<br />
4 R-37 RX-37 4 R-39 RX-39<br />
5 R-41 RX-41 5 R-44 RX-44<br />
6 R-45 RX-45 6 R-46 RX-46<br />
8 R-49 RX-49 8 R-50 RX-50<br />
10 R-53 RX-53 10 R-54 RX-54<br />
12 R-57 RX-57<br />
14 R-61 RX-61<br />
16 R-65 RX-65<br />
18 R-69 RX-69<br />
20 R-73 RX-73<br />
*Octagonal is standard in R-80 through R-99.<br />
Gasket Markings<br />
1 *R-82 RX-82<br />
11/2 R-84 RX-84<br />
2 R-85 RX-85<br />
21/2 R-86 RX-86<br />
3 R-87 RX-87<br />
4 R-88 RX-88<br />
3V2 R-89 RX-89<br />
5 R-90 RX-90<br />
10 R-91 RX-91<br />
API ring gaskets are marked with the API monogram,<br />
the R-number, and type of steel as follows:<br />
102<br />
Material Marking<br />
Soft Iron D (Cadmium plated)<br />
Type 304 SS $304<br />
Type 316 SS $316
Change language