In industrial production, flow meters are one of the key devices to ensure the accuracy of fluid measurement. Imported orifice flow meters are widely used in the petroleum, chemical, and power industries due to their high precision, stability, and reliability. However, the acceptance process after installation is often overlooked, resulting in the equipment not being able to perform at its best. This article will discuss in detail Acceptance process of imported orifice flow meter after installation to help you ensure the equipment is running properly and extend its service life.

1. Preparatory work before acceptance

Before starting the acceptance, it is necessary to clarify the goals and standards of the acceptance. Acceptance of imported orifice flow meter It is not just about checking whether the equipment is installed in place, but more importantly, verifying its measurement accuracy, stability, and safety. The following are the preparations before acceptance:

• Familiarize yourself with the equipment manual Carefully read the technical manual of the imported orifice flow meter to understand its working principle, installation requirements, and performance parameters.
• Prepare acceptance tools Including pressure gauges, thermometers, flow calibration devices, etc., to ensure that all aspects of the equipment's performance can be comprehensively tested.
• Develop an acceptance plan Clarify the acceptance steps, time arrangement, and person in charge to ensure that the acceptance work proceeds in an orderly manner.

2. Appearance inspection

Appearance inspection is the first step of acceptance, the main purpose is to confirm whether the equipment is damaged during transportation and installation. The specific inspection contents include:

• Check the orifice plate surface Ensure that the orifice plate surface is free of scratches, deformation, or corrosion, and the edges of the orifice plate should be smooth and burr-free.
• Check the flange connection Confirm that there is no leakage at the flange connection, the bolts are tightened evenly, and the sealing gasket is intact.
• Check the pipeline Ensure that there are no foreign objects in the pipeline, and there is no misalignment or tilt at the connection between the pipeline and the orifice plate.

3. Installation position and direction check

The installation position and direction of the imported orifice flow meter have an important impact on its measurement accuracy. The following contents should be checked during acceptance:

• Installation location The orifice plate should be installed on a straight pipe section, and the length of the straight pipe sections before and after should meet the design requirements. Generally, the length of the front straight pipe section should be 10-15 times the pipe diameter, and the length of the rear straight pipe section should be 5-10 times.
• Installation direction The sharp edge of the orifice plate should face the fluid flow direction to ensure that a stable pressure difference is formed when the fluid passes through the orifice plate.
• Levelness check Use a level to check the levelness of the orifice plate to ensure that it is perpendicular to the pipe axis and avoid measurement errors caused by tilting.

4. Seal test

Sealing is one of the key factors to ensure the normal operation of the imported orifice flow meter. The following tests should be carried out during acceptance:

• Pressure test Conduct a pressure test on the pipeline and orifice plate within the specified pressure range to check for leaks. Generally, the test pressure is 1.5 times the working pressure, and the duration is 10-15 minutes.
• Air tightness test For gaseous media, an air tightness test should also be carried out to ensure that there is no gas leakage at the connection between the pipeline and the orifice plate.

5. Measurement accuracy verification

Measurement accuracy is the core performance indicator of the imported orifice flow meter. The measurement accuracy should be verified through the following steps during acceptance:

• Calibrate the flow meter Use a standard flow calibration device to calibrate the imported orifice flow meter to ensure that its measured value is consistent with the standard value. Calibration should cover the entire range of the flow meter.
• Repeatability test Measure the same flow multiple times under the same conditions to check the consistency of the measurement results. The repeatability error should be less than the allowable error range of the flow meter.
• Linearity test Measure the pressure difference at different flow rates to check whether the linear relationship between the pressure difference and the flow rate meets the design requirements.

6. Environmental adaptability check

The working environment of the imported orifice flow meter has an important impact on its performance. The following contents should be checked during acceptance:

• Temperature adaptability Ensure that the flow meter works normally within the specified temperature range, and avoid measurement errors caused by excessively high or low temperatures.
• Pressure adaptability Check whether the flow meter operates stably within the specified pressure range, and avoid inaccurate measurement caused by pressure fluctuations.
• Medium adaptability Confirm that the flow meter is suitable for the physical and chemical properties of the medium being measured, and avoid equipment damage caused by medium corrosion or scaling.

7. Data recording and analysis

During the acceptance process, it is necessary to record all test data in detail and conduct scientific analysis. The specific steps include:

• Record test data Including parameters such as pressure, temperature, flow rate, and pressure difference, to ensure that the data is accurate and error-free.
• Data analysis Compare the test data with the design parameters to analyze whether there are any deviations and find the possible reasons.
• Write an acceptance report Write a detailed acceptance report based on the test results, including equipment performance, existing problems, and improvement suggestions.

8. Safety performance check

Safety performance is one of the important contents of the acceptance of imported orifice plate flow meters. The following contents need to be checked during acceptance:

• Explosion-proof performance : For flammable and explosive media, it is necessary to check whether the explosion-proof performance of the flow meter meets the relevant standards.
• Electrical safety : Check whether the electrical connection of the flow meter is firm, whether the grounding is good, and avoid safety accidents caused by electrical faults.
• Mechanical safety : Check whether the mechanical structure of the flow meter is firm to avoid equipment damage caused by vibration or impact.

9. Operation and maintenance training

After acceptance, operation and maintenance personnel should also be trained to ensure that they can correctly use and maintain the imported orifice plate flow meter. The training content includes:

• Operating specifications : Explain the operation steps, precautions and common problem handling methods of the flow meter.
• Maintenance : Introduce the daily maintenance methods of the flow meter, including cleaning, lubrication, and calibration.
• Troubleshooting : Train personnel to master the troubleshooting methods of common faults to ensure that the equipment can be repaired in time when problems occur.

Through the above steps, you can comprehensively and systematically accept the imported orifice plate flow meter to ensure its installation quality and performance. This not only helps to improve production efficiency, but also prolongs the service life of the equipment and reduces maintenance costs.