In the field of industrial automation metrology,The Cologne ultrasonic gas flowmeter is widely used in natural gas trade handover, steam monitoring, and process gas measurement due to its high precision, wide range ratio, and maintenance free characteristics.The application of its quota needs to be combined with equipment types, installation methods, and industry standards. The following analysis will be conducted from the core dimensions.

　　1、 Equipment type and quota classification

The Cologne ultrasonic gas flowmeter is mainly divided into two technical routes: time difference method and Doppler method. Taking OPTISONIC 7300 as an example, it adopts the dual channel time difference method and is suitable for measuring clean gases such as natural gas and steam. The measurement range can reach -30~30 m/s, with an accuracy of ± 1%. Such equipment is usually classified as "high-precision gas ultrasonic flowmeter" in the quota and needs to be matched with trade handover level measurement standards. For wet gases containing particles or droplets, the OPTISONIC 7300 Biogas adopts the Doppler method, and the quota should indicate the "impurity gas metering module" and add gas volume correction function.

　　2、 Installation method and quota adjustment

1. Fixed installation: If OPTISONIC 7300 adopts flange connection, the quota should include flange matching, sealing gasket and bolt tightening time.

2. External clamp installation: For old pipelines that cannot be shut down, the OPTISONIC 6300 external clamp flowmeter is fixed with guide rails, and the quota needs to add processes such as "pipeline grinding and coupling agent application", which increases the working hours by 30% compared to the fixed type.

　　3、 Industry standards and special requirements

1. Trade handover measurement: It must comply with the "JJG 1030-2007 Ultrasonic Flow Meter Calibration Regulations", and the quota must include the cost of "online real flow calibration", with a single calibration fee of about 5000 yuan.

2. Adaptation to abnormal working conditions: For cryogenic gases or high-temperature steam, OPTISONIC 8300 requires the use of special material transducers, and the cost of the "temperature resistant sensor module" needs to be separately listed in the quota.

　　4、 Fixed quota application case

In a certain steel enterprise's blast furnace gas metering project, OPTISONIC 7300 was selected, and the quota application process is as follows:

1. Equipment classification: Apply quota sub items according to "high-pressure gas ultrasonic flowmeter";

2. Installation adjustment: Due to insufficient 5D straight pipe sections in the pipeline, an installation process for a "flow regulator" has been added, resulting in a 20% increase in the rated working hours;

3. Additional features: Enable the "Sound Velocity Measurement Module" for molar mass calculation, and increase the cost of the "Gas Component Analysis Function" by 3000 yuan.

The quota application of Cologne ultrasonic gas flowmeter requires comprehensive technical parameters, installation conditions, and industry standards. By refining equipment classification, clarifying installation procedures and additional functions, precise matching between quota and actual engineering can be achieved. It is recommended that enterprises refer to the "Budget Quota for Petrochemical Installation Engineering" and equipment manufacturers' technical manuals, and develop differentiated quota plans based on specific project requirements.