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Flow meter inlet and outlet

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1. [Product Inspection] How much do you know about the weight appraisal of imported and exported goods?

Weight appraisal of imported and exported goods is an important part of international trade. Chinese customs implements weight appraisal of imported and exported goods in accordance with relevant laws and regulations. Appraisal methods include water gauge weighing, container weighing, weighing instrument weighing, flow meter weighing, etc. Customs supervises weight appraisal through enterprise application and spot checks based on their authority.. The method of weight assessment is defined as water gauge weighing, which measures the draft of the bow, midship, and stern of the carrying vessel before and after loading or unloading. At the same time, the density of the port water in the water area where the vessel is located is measured, and the displacement of the vessel is calculated based on the accurate chart of the vessel. Combined with the weight calculation of the vessels ballast water, fresh water, fuel oil, marine materials, and non cargo, a weighing method is used to determine the weight of the loaded or unloaded cargo. Principle: Applying Archimedes law, which states that the magnitude of buoyancy experienced by an object immersed in a liquid is equal to the weight of the liquid displaced by the object. Influencing factors: wind and wave size, complex ship shape, hull deformation, changes in port water density, changes in ballast water, fuel, fresh water, and other materials on board, effectiveness of ship capacity and displacement meters, etc. Scope of application: Generally applicable to bulk solid bulk commodities with low value and difficulty in weighing with weighing instruments, such as o

Flow meter inlet and outlet
re, coal, grain and other import and export commodities. Features: Short measurement time and low cost, generally only requiring two water gauge measurements before and after unloading. Container weighing definition: A method of calculating the weight of liquid goods by measuring the liquid level (liquid depth or empty distance) inside a container that has passed metrological verification as the main tool, and combining it with the density and temperature of the liquid inside the container, and making necessary corrections. It is also known as static weighing of liquid goods. Measuring containers include ship holds, oil tanks, oil barges, tank trucks, or tankers. Classification: It can generally be divided into two types: cabin capacity weighing and shore tank capacity weighing. Scope of application: Commonly used for crude oil, gasoline, diesel, liquefied petroleum gas, and various chemical products. Features: High measurement accuracy and low implementation cost. Definition of Weighing Instrument: Using accurate weighing instruments, scientific methods, correct operation, and standardized calculations to determine the accurate weight of goods. Principle: The application principles mainly include lever principle, hydraulic principle, elastic deformation principle, and force electric conversion principle. Classification: According to different operating methods, weighing instruments can be divided into two categories: Song type grinding non automatic weighing instruments and automatic weighing instruments. Non automatic scales include floor scales, platform scales, hanging scales, etc; Automatic scales include belt scales, automatic hopper scales, automatic track scales, etc. Scope of application: Mainly used for bulk im

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