Baker Hughes Panametrics PanaFlow LC, Руководство пользователя

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IMPORTANT:
Make sure the chains are perpendicular to the clamping
fixture and are not twisted. If the chains are slanted, the
slack may cause the fixture to move. Also, the transducer
spacing dimension may change after the transducers are
mounted.
Figure 86 below shows a completed even-traverse
installation without the transducers. Proceed to the section
on mounting the transducers later in this chapter.
Figure 86: Finished UCF installation without transducers
B.1.2 Odd number of-traverse method
Note: The instructions in this section can also be used for a
multiple-traverse method. However, you must use an ODD
number of traverses. The distance the signal travels from
one side of the pipe wall to the opposite side of the pipe wall
is considered one traverse. For installations with more than
one traverse, contact Panametrics for assistance.
The procedure for mounting the UCF for the odd number
of-traverse method requires one long block and two short
blocks. The long block is fastened to the pipe first and then
the short block assembly is properly aligned and fastened
180° around the pipe from the long block.
To install the UCF, complete the following steps:
1. Choose a location for the installation that has at least 10
pipe diameters of straight, undisturbed flow upstream
and at least 5 pipe diameters of straight, undisturbed
flow downstream from the measurement point.
2. Prepare the pipe where you intend to place the UCF
by making sure it is clean and free of loose material.
Sanding, though usually not required, may be necessary
to remove any high spots. However, be careful to
preserve the original curvature of the pipe.
3. Use a level to find the top of the pipe and then draw a
line parallel to the centerline of the pipe.
Figure 87: UCF setup, odd traverse, step 3
4. Using a level and center punch, make two marks on the
line drawn in step 3. These marks must be separated by
the transducer spacing distance S, as calculated by the
flowmeter.
Figure 88: UCF setup, odd traverse, step 4
5. From one of the marks on the top of the pipe, measure
around the pipe a distance equal to 1/4 of the pipe
circumference, or a distance that will satisfy the
orientation found in Step 1. Use the center punch to
make a mark at this point.
Figure 89: UCF setup, odd traverse, step 5
6. From the other mark on the top of the pipe, measure
around the pipe in the opposite direction a distance
equal to 1/4 of the pipe circumference, or the same
distance used in Step 5. Use the center punch to make a
mark at this point.
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