What is ISO 21903 about?
ISO 21903 is an international standard on refrigerated hydrocarbon fluids that discusses about its various functionalities. ISO 21903 specifies the metrological and technical requirements for flowmeters intended to be used for the dynamic measurement of liquefied natural gas (LNG) and other refrigerated hydrocarbon fluids. For LNG static volume measurement used in custody transfer, see ISO 10976.
ISO 21903 sets the best practice for the proper selection and installation of flowmeters in cryogenic applications and identifies the specific issues that can affect the performance of the flowmeter in use.
Moreover, it offers a calibration guideline for laboratory and on-site conditions (mass or volume) by either using LNG or other reference fluids. The choice of calibration fluid will depend on the capabilities of the available flow calibration facilities and the ability to achieve the required overall measurement uncertainty demanded by the intended application.
ISO 21903 is applicable, but is not limited, to the use of Coriolis and ultrasonic flowmeters for dynamic measurements of LNG. In principle, LNG and other refrigerated liquid hydrocarbons are considered in ISO 21903.
Recommendations in ISO 21903 are based on the available test results with LNG. These results are probably applicable to other cryogenic fluids.
Who is ISO 21903 for?
ISO 21903 on flowmeters is beneficial for
- Manufacturer of flowmeter
- Liquefied natural gas (LNG) industry
- Supplier and consumer of flowmeter
Why should you use ISO 21903?
A flow meter is an instrument used to measure the linear, nonlinear, mass or volumetric flow rate of a liquid or a gas
ISO 21903 provide information on flowmeter selection, process conditions, installation, calibration required for flowmeters intended to be used for the dynamic measurement of liquefied natural gas (LNG) and other refrigerated hydrocarbon fluids.
ISO 21903 provides guidelines for the selection and installation of cryogenic flowmeters this helps him to determine the volume and mass flow of liquefied natural gas under cryogenic conditions. ISO 21903 assist the user in adjusting cryogenic flowmeters. ISO 21903 provides designers of metering stations. ISO 21903 exemplifies a set of valuable guidelines to enable better performance of liquid flowmeters under cryogenic operating conditions. In this manner, you can deliver efficient and reliable products.