Thermal mass flowmeters straight piping line requirements
Generally, thermal mass flow meter can be installed vertically, horizontally or at any angle but requiring less straight pipe to make sure the flow from upstream is smoothly. User need to make sure the 10 pipe diameter lengths upstream and 5 pipe diameter lengths downstream.
Straight pipe line of thermal mass flowmeters installation required:
Curved pipe line in the upstream or downstream
Curved pipe line that may create turbulence in the upstream or downstream
There are valves or pressure controller or any other device may cause turbulence in upstream or downstream of the flowmeter
If the pipeline of the flowmeter is upsized
If the pipeline of the flowmeter is downsized
On a horizontal pipe line, normal air or gas
Above or under the pipeline Side of the pipeline
On a horizontal pipe line, high humidity air or wet natural gas.
45 degree under the pipe line or just under the pipeline
On the side of the pipe. Do not recommend to install the meter above the pipeline
On a vertical pipeline, when the density of the gas is higher than air make sure the flow goes from down to up