Verification Regulations for Quality Flowmeters

『Verification Regulations for Quality Flowmeters』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. What equipment is needed for measuring bulk cargo on board ships? The equipment required for measuring bulk cargo on board ships is divided into two categories: shore based handover measurement and ships own use measurement, covering four categories: liquid level early detection, quality/weight detection, parameter collection, and auxiliary supporting equipment Coriolis mass flowmeter/turbine flowmeter, installed on the transportation pipeline of the dock, directly measures the mass or volume flow of liquid cargo, accumulates the total loading and unloading weight, and has a conventional measurement accuracy of 0.1%~0.5%. It is currently the mainstream measuring equipment for liquid cargo handover at the dock. （2） Special measuring equipment for dry bulk cargo 1 The loading belt scale is integrated into the conveyor belt system of the dock loading machine, which real-time collects the instantaneous flow rate and cumulative loading and unloading total of dry bulk cargo, and the accuracy meets the requirements of JJG 195-2019 "Belt Scale" verification regulations. 2. Port rail scale/truck scale is used to weigh the single batch weight of dry bulk cargo carried by railway and highway trucks before loading, and summarize to obtain the total shipment volume of a single ship.

II. Ships own measuring equipment (1) Cabin working condition parameter collection equipment 1 Explosion proof radar/ultrasonic level gauge, installed at the top of the cargo tank and bulk cargo tank, measures the height of the cargo in the tank, calculates the loading volume based on the tank capacity curve, and the explosion-proof level needs to reach Ex d IIB T4 or above, suitable for flammable, explosive, and dusty working environments i

n the tank. 2. Platinum resistance temperature sensor, arranged in different depths of the tank, collects temperature data to correct the density of the cargo and improve measurement accuracy. 3. Pressure transmitter, used to measure the gas pressure in the tank and complete the pressure compensation process of volume measurement. （2） Dry bulk auxiliary measuring equipment 1 Electronic depth gauge/automatic draft sensor, used to measure the draft depth of a ship, combined with the ships static hydraulic data table, calculates the total weight of dry bulk cargo through the water gauge method, which is a backup measurement method in the scenario without loading measuring equipment. 2. Fixed point sampler in the cargo compartment, extracts cargo samples from different cargo layers and positions, detects moisture content and impurity rate, and corrects the final measured weight. （3） Liquid cargo dedicated sampling equipment 1 A closed sampler is used to extract representative samples from the cargo during the loading and unloading process, and must comply with the sampling safety requirements of the IMO "Guidelines for the Inspection of Bulk Liquid Cargo Transport".

III. Auxiliary Supporting Equipment 1 Wireless data collection and transmission terminal synchronizes the liquid level, temperature, and pressure data in the cabin to the ships bridge or shore based measurement platform, achieving remote real-time monitoring. 2. Standard measuring calibration instruments, including standard density meters, standard weights, and flow calibration devices, are used to regularly trace and calibrate measuring equipment to ensure measurement accuracy meets national or industry standards. 3. Explosion proof safety protection equi

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