MU300 Rev1.0 Oct20
Page 15 of 54
5.2
Pipe Design and Selection
The following should be considered when selecting a pipe:
5.2.1
Installation Environment
It is better to install the flowmeter indoors; if you have to install it outdoors, you should take
measures to avoid direct sunlight or rainwater.
The flowmeter shall be installed away from high temperature, thermal radiation from equipment
or corrosive gas.
Ultrasonic flowmeters cannot be installed nearby motors, transformers or other power sources
that are easy to cause electromagnet interference. DO NOT install ultrasonic flowmeters nearby
frequency converters or DO NOT connect it with the distributing cabinet of frequency converters
to avoid interference.
In convenience for installation and maintenance, keep sufficient space around the flowmeter.
5.2.2
Support of Flowmeter
Avoid installing the flowmeter on pipes with mechanical vibrations. If you must install it there,
DO take shock absorption measure. You could install a hose for transition or set support points
with absorbing pads on the pipe at 2DN in both upstream and downstream of the flowmeter. Try
not to install the flowmeter on the longer overhead pipes because the sagging of pipes would
cause leakage between the flowmeter and the flanges. If you have to do it, you must set support
points on the pipe at 2DN in both upstream and downstream of the flowmeter.
5.2.3
Requirements on Liquid-receiving Material
The ultrasonic flowmeter could measure single-medium liquid flow; The same medium could be
divided into three specifications (low temperature, high temperature and superhigh
temperature), different flowmeters should be used for different temperatures.
5.2.4
Dangerous Conditions
You could select the flowmeter with an explosion-proof housing, and intrinsic safety explosion-
proof flowmeter with intrinsic safety design circuit to ensure its safety and flame-retardant
operation. Each flowmeter should have a nameplate clearly identifying its certifications. Please
DO install and use the flowmeter according to the explosion-proof grade and protection grade as
shown on the nameplate.
