Gas turbine flowmeter installation instructions

There are many kinds of gas flow meters, and I will introduce you to a turbine flow meter:
Turbine flowmeter installation precautions
In order to ensure accurate measurement of the turbine flowmeter, the installation location and method must be correctly selected.
Requirements for straight pipe sections:
   The flowmeter must be installed horizontally on the pipeline (the pipeline is inclined within 50). When installing, the flowmeter axis should be concentric with the pipeline axis and the flow direction should be consistent.
   The length of the pipeline upstream of the flowmeter should have a straight pipe section of not less than 2D. If the installation site is sufficient, it is recommended that the upstream straight pipe section is 20D and the downstream pipe section is 5D.
Requirements for piping:
   The inner and downstream pipes of the flowmeter installation point have the same inner diameter as the inside diameter of the flowmeter.
Requirements for the bypass:
   In order to ensure that the flowmeter does not affect the normal use of the medium during maintenance, a shut-off valve (shut-off valve) should be installed on the pipe before and after the flowmeter, and a bypass pipe should be installed. The flow control valve should be installed downstream of the flowmeter. When the flowmeter is in use, the upstream shut-off valve must be fully open to avoid unstable flow in the upstream part of the fluid.