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.
Installation Requirements
Straight pipe line of thermal mass flowmeters installation required:
Standard | ![]() |
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 | ![]() |