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Table 4-18<br />
API Clamp Type Connec<strong>to</strong>rs<br />
Integral Hubs and Clamps<br />
10,000 psi Maximum Working Pressure<br />
OD Clamp Nut Size Wrench<br />
Nominal of Hub Ring Clamp Weight for Clamp Size for Washer<br />
Size (in.) (in.) Number Number (ibs) (in.) Nut (in.) OD (in.)<br />
113/le 5.500 RX-20 1A 28 %-9UNC-2B 17/lS --<br />
2Y16 6.750 RX-23 2A 35 1-8UNC-2B 1% --<br />
2gh6 7.500 RX-24 3A 45 11/6-8UN-2B 1 mh6 --<br />
3V16 9.250 RX-27 4A 1 O0 11/,-8U N-2B 2 --<br />
4V16 11.500 RX-35 5A 56 13h-8UN-2B 23116 --<br />
7Y16 16.000 RX-45 7A 111 2-8UN-2B 31/6 --<br />
9 18.500 RX-49 8A 160 2V2-8UN-2B 37/a --<br />
11 20.625 RX-53 11A 274 2%-8UN-2B 41/4 4.25"<br />
136/6 22.468 RX-57 12A 215 31/4-8UN-2B 5 5.00<br />
16314 28.000 RX-65 13A 593 3716-8UN-2B 516116 5.94<br />
18314 31.250 RX-69 14A 366 41h,-8UN-2B 67/a 6.88<br />
211/4 34.000 RX-73 15A 850 4%-SUN-2B 71/4 7.25<br />
* Clamp sizes 1A through 8A require the use of spherical face nuts.<br />
Clamp sizes 9A and 15A require the use of spherical washers and standard nuts.<br />
Table 4-19<br />
Recommended Bolt Torque for Clamp Type Connec<strong>to</strong>rs<br />
Bolt Size Bolt Tension (Ibs) Makeup Torque (ft Ibs)<br />
7/8 -9UNC<br />
1 -8UNC<br />
11/8 -8UN<br />
11/4 -8UN<br />
13/8 -8UN<br />
1% -8UN<br />
2 -8UN<br />
21/2 -8UN<br />
2% -8UN<br />
23/4 -8UN<br />
31/4 -8UN<br />
37/8 -8UN<br />
41/2 -8UN<br />
43/4 -8UN<br />
100<br />
16,760<br />
22040<br />
29 120<br />
37 160<br />
46200<br />
67200<br />
1O6000<br />
171600<br />
190400<br />
210,400<br />
299.600<br />
433200<br />
591 200<br />
660000<br />
195<br />
292<br />
428<br />
600<br />
815<br />
1382<br />
2645<br />
5287<br />
6182<br />
7099<br />
11,685<br />
20,236<br />
32,078<br />
37,745