Emerson Rosemount 1195 User Manual

Rosemount Model 1195/ProPlate/Mass ProPlate
2-2
If the orifice assembly has socket-weld end connections, the customer
must machine the corresponding ends of the process pipe to the
appropriate outside diameter for a slip-in fit. Dimensions for this
procedure are listed in Section 10: Specifications and Reference Data.
Use welding procedures qualified per AWS, API, ASME, or other
appropriate industry code when installing assemblies with socket-weld
or beveled pipe end connections.
Bypass Manifold
A differential pressure transmitter, such as the Model 3051C, can be
mounted directly to the orifice assembly with a bypass manifold, or
mounted indirectly using customer-supplied pressure piping.
Installation of a 3-valve bypass manifold between the orifice and
transmitter to allow transmitter servicing without process flow
interruption is recommended.
Remote Connectors
Transmitters remotely connected to the orifice require two pairs of
pressure connection adaptors and bolts. One pair is supplied with the
transmitter and the other is provided with the orifice assembly.
Connections for the pressure piping are tapped for
× –14 NPT. Any remote
pressure piping must be supplied by the customer.
Straight Pipe Lengths
Associated piping optionally supplied with the orifice assembly
measures approximately 20 pipe diameters upstream and 10 diameters
downstream. Flow must enter the orifice assembly at the upstream
end. These straight lengths minimize the effects of upstream and
downstream piping disturbances. If the disturbance is severe, or if the
piping is not supplied with the orifice assembly, refer to Figure 2-2 for
the minimum required straight runs of pipe for specific upstream
disturbance situations.
Gaskets
The customer must provide gaskets between the orifice assembly flange
and the mating process flange. These gaskets must be compatible with
the process temperature, pressure, and corrosion factors. Make sure
that the process flanges are compatible with the orifice assembly flanges.
Wetleg Seal Liquid
In cases where the process fluid cannot come into direct contact with
the transmitter, use a suitable seal liquid in the transmitter lines. If the
process fluid is steam, then water is the only suitable seal liquid. For
other process fluids, your sales representative can help determine the
proper seal liquid where a wetleg installation is desired.
Mounting a differential pressure transmitter or a 3-valve bypass manifold directly to the
orifice assembly can damage the process piping if vibration is present. Use a transmitter
support bracket if this condition exists.

Emerson Rosemount 1195 Specifications

General

Brand	Emerson
Model	Rosemount 1195
Category	Measuring Instruments
Language	English