Sierra INNOVA-MASS 240-VT, Инструкция по эксплуатации, Страница: 18 / 146

Sierra 240/241Series Instruction Manual Chapter 2 Installation
IM-240 2-3
240 In-Line Flow Meter Installation
Install the 240 In-Line Flow Meter between two conventional pipe flanges
as shown in Figures 2-3 and 2-4. Table 2-1 provides the recommended
minimum stud bolt lengths for wafer-style meter body size and different
flange ratings.
The meter inside diameter is equal to the same size nominal pipe ID in
schedule 80. For example, a 2” meter has an ID of 1.939” (2” schedule
80). Do not install the meter in a pipe with an inside diameter smaller
than the inside diameter of the meter. For schedule 160 and higher
pipe, a special meter is required. Consult the factory before purchasing
the meter.
The InnovaMass 240 meters require customer-supplied gaskets. When se-
lecting gasket material make sure that it is compatible with the process
fluid and pressure ratings of the specific installation. Verify that the inside
diameter of the gasket is larger than the inside diameter of the flow meter
and adjacent piping. If the gasket material extends into the flow stream, it
will disturb the flow and cause inaccurate measurements.
Flange Bolt Specifications
Stud Bolt Lengths for Each Flange Rating (inches)
Line Size Class 150
and PN16 Class 300
and PN40 Class 600
and PN64
1 inch 6.00 7.00 7.50
1.5 inch 6.25 8.50 9.00
2 inch 8.50 8.75 9.50
3 inch 9.00 10.00 10.50
4 inch 9.50 10.75 12.25
Table 2-1. Minimum Recommended Stud Bolt Lengths for Wafer Meters
The required bolt load for sealing the gasket joint is affected by several
application-dependent factors, therefore the required torque for each ap-
plication may be different. Refer to the ASME Pressure Vessel Code
guidelines for bolt tightening standards.
1
2
3 4
1
2
3 4
5
6
7
8
1
5
9
3
7
11
2
6
10
4
8
12
4-bolt 8-bolt 12-bolt
Figure 2-2. Flange Bolt Torquing Sequence