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Description of the requirements for straight pipe sections when installing vortex flowmeters

Properly selecting the installation point and properly installing the flowmeter are very important links. If the installation link is wrong, the measurement accuracy will be affected, and the heavy one will affect the service life of the flowmeter and even damage the flowmeter.

The requirements for straight pipe sections during vortex flowmeter installation are very important. Its detailed requirements are as follows:

The flowmeter has certain requirements on the upstream and downstream straight pipe sections at the installation point, otherwise the measurement accuracy will be affected.

If there is a tapered tube upstream of the installation point of the flowmeter, there should be a straight pipe section of not less than 15D (D is the pipe diameter) upstream of the flowmeter, and a straight pipe section of not less than 5D in the downstream.

If there is a diverging pipe upstream of the installation point of the flowmeter, the upstream of the flowmeter shall have a straight pipe section of not less than 18D (D is the pipe diameter), and the downstream shall have a straight pipe section of not less than 5D.

If there is a 90° elbow or a downward joint upstream of the installation point of the flowmeter, there should be a straight pipe section of not less than 20D upstream of the flowmeter, and a straight pipe section of not less than 5D downstream.

If there is a 90° elbow on the same plane upstream of the installation point of the flowmeter, there should be a straight pipe section of not less than 25D upstream of the flowmeter, and a straight pipe section of not less than 5D downstream.

The flow regulating valve or pressure regulating valve should be installed as far as possible downstream of the flowmeter 5D. If it must be installed upstream of the flowmeter, the upstream of the flowmeter should have a straight pipe section of not less than 25D, and the downstream should have a straight pipe section of not less than 5D. .

If there is a piston type or plunger type pump in the upstream of the flowmeter, a piston type or a Roots type fan and a compressor, there should be a straight pipe section of not less than 25D upstream of the flowmeter, and a straight pipe section of not less than 5D in the downstream.

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