Reference Manual
00809-0100-4793, Rev CA
August 2004
3-7
Rosemount 8742C
INSTALLATION
(FLANGED FLOWTUBE)
The following section should be used as a guide in the installation of the
flange-type Rosemount 8705 and Rosemount 8707 High-Signal Flowtubes.
Refer to page 3-10 for installation of the wafer-type Rosemount 8711
Flowtube.
Gaskets
The flowtube 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.
If the gaskets will be removed frequently, protect the liner ends. All other
applications (including flowtubes with lining protectors or a grounding
electrode) require only one gasket on each end connection, as shown in
Figure 3-8. If grounding rings are used, gaskets are required on each side of
the grounding ring, as shown in Figure 3-9.
Figure 3-8. Gasket Placement
Figure 3-9. Gasket Placement
with Non-attached Grounding
Rings
Flange Bolts
Suggested torque values by flowtube line size and liner type are listed in
Table 3-1 on page 3-8 for ASME B16.5 (ANSI) flanges and Table 3-2 and
Table 3-3 for DIN flanges. Consult the factory for other flange ratings. Tighten
flange bolts in the incremental sequence as shown in Figure 3-10. See
Table 3-1 and Table 3-2 for bolt sizes and hole diameters.
See ”Safety Messages” on pages 3-1 and 3-2 for complete warning information.
Gasket (Supplied by user)
8705-0040E
Gasket (Supplied by user)
Grounding Ring
Gasket (Supplied by user)
8705-0038D
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