Panametrics BWT System, Руководство по установке, Страница: 13 / 58

BWT™ System Installation Guide 5
Chapter 1. General Information
1.5 Handling and Installing a Meter Body
To ensure proper nozzle alignment, Panametrics uses the highest quality welding and machining techniques when
manufacturing meter bodies. Since proper alignment of the nozzles is important to making accurate flow
measurement, great care must be taken when unpacking and installing the meter body.
1.5.1 Unpacking a Meter Body
Upon receipt, you should take great care in unpacking the meter body. Although meter bodies are constructed of
steel, improper unpacking or handling can result in damage or affect nozzle alignment. Use the guidelines below for
unpacking the meter body:
• Since the nozzles protrude from the pipe, take care when removing packing material and the meter body from
its shipping container, so as not to disturb the nozzles.
• After the meter body is removed from its shipping container, never allow the full weight of the meter body to
rest on the nozzle or buffer. You should prop up the meter body to prevent it from rolling over, which again, may
cause damage or misalignment of nozzles.
• Do not let the meter body hit against other objects or surfaces. Nozzle alignment can be affected if the meter
body is dropped onto sand or the ground.
• If the meter body is shipped with the buffers already installed in the nozzles, take care as to not disturb the
buffers when unpacking.
1.5.2 Installing a Meter Body
Meter bodies can be either flanged or welded into the existing pipeline. Use the following steps to position the meter
body into the pipeline (refer to Figure 4 on the next page):
1. Find the tag plate with the words TOP and FLOW DIRECTION marked on it. If the meter body is flanged, two bolt
holes should straddle the vertical centerline.
IMPORTANT: In general (including cases where the meter body axis is not horizontal), be sure that the installation
does not allow gas or sediment to deposit in the transducer ports. Otherwise the sound waves could be
attenuated or blocked entirely.
2. Place the meter body in the pipeline so that the FLOW DIRECTION arrow mark is in the direction of flow and the top
is appropriately located. (Be sure the transducer ports are in a horizontal plane.)
IMPORTANT: If you cannot place the meter body in the required orientation, consult the factory; otherwise
operational problems may occur.
3. Do one of the following:
•
Bolt the meter body into place and proceed to the appropriate section that follows to mount the BWT buffers
and transducers.
• Weld the meter body into place in accordance with the requirements described in
Welding Requirements
below. Once welding is completed, proceed to the appropriate section that follows to mount the BWT buffers
and transducers.
WARNING!
Before installing the meter body, make sure pipe flushing is completed. For additional
information when flushing is necessary, refer to
“Meter Body Requirements When
Flushing” on page 7
.