Circular orifice flow meter | Piping regulations for flow meters

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1. What are the components of an orifice flowmeter and can be directly put into use?

The structure of an integrated orifice flowmeter is divided into four parts:

1. Throttle components: standard orifice plate, standard nozzle, long diameter nozzle, 1/4 circular orifice plate, double orifice plate, eccentric orifice plate, circular orifice plate, conical inlet orifice plate, etc.

2. Pressure tapping device head: Bianqin Hu ring chamber, pressure tapping flange, clamping ring, pressure guiding pipe, etc.

3、 Connecting flanges (national standards, various standards, and flanges from other design departments) and fasteners.

4. Measuring tube.

2. Is the principle of the orifice flowmeter the same as that of the bent pipe flowmeter?

The working principle of the orifice flowmeter is that the fluid filled in the pipeline flows through the throttling device inside the pipeline, causing local contraction near the throttling element, increasing the flow velocity, and creating a static pressure difference on the upstream and downstream sides.

. Under the condition of known parameters, the relationship between differential pressure and flow rate can be derived based on the principle of flow continuity and Bernoulli equation to obtain the flow rate. The basic formula is as follows: c - Non dimensional outflow coefficient d - Diameter of the orifice or throat of the throttling element under working conditions D - Inner diameter of the upstream pipeline under working conditions qm - Mass flow rate Kg/s qv - Volume flow rate m ³/s ß - Diameter ratio d/D Non dimensional fluid density Kg/m ³ Scalability coefficient Non dimensional orifice plate flowmeter structure composed of throttli Circular orifice flowmeter

ng elements: standard orifice plate, standard nozzle, long diameter nozzle, 1/4 round hole plate, double orifice plate, eccentric orifice plate, circular hole plate, conical inlet orifice plate, etc. Pressure tapping devices: ring chamber, pressure tapping flange, clamping ring, pressure pipe, etc. Installation requirements for measuring tube orifice plate flowmeter: The requirements for straight pipe section are generally the front 10D followed by 5D, Therefore, when selecting an orifice flowmeter, it is necessary to choose a flowmeter suitable for the on-site industrial and mining conditions. The working principle of the bent tube flowmeter is the same as the conventional orifice flowmeter, which belongs to the category of differential pressure flowmeter. However, the way in which the bent tube flowmeter generates differential pressure is different from that of the orifice flowmeter. The orifice plate uses the scaling principle of the fluid to generate differential pressure, while the bent tube sensor uses the inertia principle of the fluid to generate differential pressure. When the fluid passes through a bend, it is forced to make a similar circular motion due to the constraint of the bend. The centrifugal force generated by the fluid during circular motion acts on the inner and outer sides of the bend, creating a pressure difference between the inner and outer sides of the bend sensor. The magnitude of this pressure difference (i.e., the pressure difference) is related to the density of the fluid, the average flow velocity of the fluid, and the curvature radius of the fluid during circular motion. They follow the relevant laws of Newtons laws of motion that all objects in circular motion must follow.

Circular orifice flow meter | Piping regulations for flow meters

1. What are the components of an orifice flowmeter and can be directly put into use?

2. Is the principle of the orifice flowmeter the same as that of the bent pipe flowmeter?

3. Pipi

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