Emerson 8700 Series, Reference Manual

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Reference Manual
00809-0100-4793, Rev CA
August 2004
3-11
Rosemount 8742C
3. Place the flowtube between the flanges. Make sure that the centering
rings are properly placed in the studs. The studs should be aligned
with the markings on the rings that correspond to the flange you are
using.
4. Insert the remaining studs, washers, and nuts.
5. Tighten to the torque specifications shown in Table 3-5. Do not
overtighten the bolts or the liner may be damaged.
NOTE
On the 4- and 6-inch PN 10–16, insert the flowtube with rings first and then
insert the studs. The slots on this ring scenario are located on the inside of the
ring.
Figure 3-11. Gasket Placement
with Centering Rings
Flange Bolts
Flowtube sizes and torque values for both Class 150 and Class 300 flanges
are listed in Table 3-5. Tighten flange bolts in the incremental sequence,
shown in Figure 3-10.
Always check for leaks at the flanges after tightening the flange
bolts. All flowtubes require a second torquing 24 hours after initial flange bolt
tightening.
Table 3-4. Stud Specifications
Nominal Flowtube Size Stud Specifications
0.15 – 1 inch (4 – 25 mm) 316 SST ASTM A193, Grade B8M
Class 1 threaded mounted studs
1
1
/
2
– 8 inch (40 – 200 mm) CS, ASTM A193, Grade B7, threaded mounting studs
Customer-supplied
Gasket
FLOW
8732-0002A1A
Installation, Studs
Nuts and Washers
Centering Rings