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Quick Installation Guide
00825-0100-4662, Rev CD
Rosemount 8732
June 2013
S
4: I
TEP
NSTALLATION
Flanged Sensors
Gaskets
The sensor requires a gasket at each of its connections to adjacent devices or piping. The gasket material
selected must be compatible with the process fluid and operating conditions. Metallic or
spiral-wound gaskets can damage the liner. Gaskets are required on each side of a grounding
ring. All other applications (including sensors with lining protectors or a grounding electrode)
require only one gasket on each end connection.
Figure 7. Flanged gasket placement
Flange Bolts
NOTE:
Do not bolt one side at a time. Tighten each side simultaneously. Example:
1. Snug upstream
2. Snug downstream
3. Tighten upstream
4. Tighten downstream
Do not snug and tighten the upstream side and then snug and tighten the downstream side.
Failure to alternate between the upstream and downstream flanges when tightening bolts may
result in liner damage.
Suggested torque values by sensor line size and liner type are listed in Table 1 for ASME B16.5
flanges and Table 2 for EN flanges. Consult the factory if the flange rating of the sensor is not
listed. Tighten flange bolts on the upstream side of the sensor in the incremental sequence
shown in Figure 8 to 20% of the suggested torque values. Repeat the process on the
downstream side of the sensor. For sensors with more or less flange bolts, tighten the bolts in a
similar crosswise sequence. Repeat this entire tightening sequence at 40%, 60%, 80%, and 100%
of the suggested torque values or until the leak between the process and sensor flanges stop.
If leakage has not stopped at the suggested torque values, the bolts can be tightened in
9
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