EN 24185:1993
(Main)Measurement of liquid flow in closed conduits - Weighing method (ISO 4185:1980)
Measurement of liquid flow in closed conduits - Weighing method (ISO 4185:1980)
Specifies a method of determining the liquid flow-rate by measuring the mass of liquid delivered into a weighing tank in a known time intervall. Deals in particular with the measuring apparatus, the procedure, the method for calculating the flow-rate and the uncertainties associated with the measurement. Does not cover the cases of corrosive or toxic liquids.
Durchflussmessung von Flüssigkeiten in geschlossenen Leitungen - Wägeverfahren (ISO 4185:1980)
Diese Internationale Norm beschreibt ein Verfahren zur Durchflussmessung von Flüsigkeiten in geschlossenen Leitungen durch Messen des Massendurchflusses einer Flüssigkeit, die innerhalb eines bekannten Zeitraumes in einem Wägebehälter gefüllt wird. Sie behandelt die Messeinrichtung, die Durchführung, das Verfahren der Berechnung des Durchflusses und die Messunsicherheit dieser Messungen.
Mesure de débit des liquides dans les conduites fermées - Méthode par pesée (ISO 4185:1980)
La présente Norme internationale spécifie une méthode de mesurage d'un débit de liquide en conduite fermée par mesurage de la masse de liquide déversé dans une cuve de pesée pendant un certain temps. Elle traite en particulier de l'appareillage de mesure, du mode opératoire, de la méthode de calcul du débit et des incertitudes sur les résultats de mesure. La méthode décrite peut être facilement étendue à tout liquide autre que l'eau, à condition que sa pression de vapeur saturante soit telle que la perte de liquide par évaporation lors de la pesée soit suffisamment faible pour ne pas affecter la précision de mesure recherchée. L'emploi d'une cuve de pesée fermée pour la mesure de débit des liquides ayant une pression de vapeur saturante élevée n'est pas pris en considération dans la présente Norme internationale. Le cas des liquides agressifs ou toxiques n'est pas envisagé dans la présente Norme internationale. Théoriquement, il n'y a aucune limite pour l'emploi de la prése
Merjenje pretoka tekočin v zaprtih vodih - Metoda tehtanja (ISO 4185:1980)
General Information
- Status
- Published
- Publication Date
- 22-Jun-1993
- Withdrawal Date
- 30-Dec-1993
- Technical Committee
- CEN/TC 244 - Measurement of fluid flow in closed conduits
- Drafting Committee
- CEN/TC 244 - Measurement of fluid flow in closed conduits
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 28-Nov-1999
- Completion Date
- 28-Nov-1999
Relations
- Corrected By
EN 24185:1993/AC:1993 - Measurement of liquid flow in closed conduits - Weighing method (ISO 4185:1980) - Effective Date
- 22-Dec-2008
Overview
EN 24185:1993 (ISO 4185:1980) defines the weighing method for measuring liquid flow in closed conduits by collecting liquid in a weighing tank for a known time interval and determining flow-rate from the measured mass. Published by CEN and identical to ISO 4185:1980, the standard sets out the required measuring apparatus, test procedure, calculation method and guidance on assessing measurement uncertainty. It explicitly excludes corrosive or toxic liquids.
Key topics and technical requirements
- Measurement principle: Determination of volumetric/ mass flow-rate from the mass of liquid delivered into a weighing tank over a measured time interval.
- Measuring apparatus: Specifications for a weighing tank and associated instrumentation needed to obtain accurate mass/time data (design, capacity and installation considerations are covered in general terms).
- Test procedure: Stepwise guidance on conducting a weighing test-starting, steady-state sampling, and stopping-so that the delivered mass and time are recorded reliably.
- Calculation method: Conversion of measured mass and elapsed time into flow-rate, including any corrections (e.g., density/temperature) necessary to report volumetric flow if required.
- Uncertainty assessment: Requirements for estimating and reporting measurement uncertainty associated with weighing, timing, density corrections and other influencing factors.
- Scope limits: Not applicable to corrosive or toxic liquids; intended for safe, non-hazardous fluids where direct collection and weighing are practical.
Practical applications
- Primary/secondary flow calibration: Used by flow calibration laboratories and national metrology institutes as a reference or verification method for other flow meters.
- Acceptance and performance testing: Applicable for commissioning and acceptance tests of pipework, pumps and flow meters in industrial plants.
- Process control validation: Enables process engineers to verify actual delivered mass/volume for batching, custody transfer and quality control where high accuracy is required.
- Suitable industries: Water utilities, food & beverage, pharmaceuticals, and chemical processes handling non-corrosive, non-toxic liquids.
Who should use this standard
- Flow calibration labs and testing service providers
- Instrument manufacturers and flowmeter designers seeking a reference method
- Plant engineers and quality managers performing acceptance tests
- Metrologists performing uncertainty evaluations and traceable flow measurements
Related standards
- ISO 4185:1980 - identical international reference cited by EN 24185.
- Other flow measurement standards (for different methods) - ultrasonic, volumetric tank, or differential pressure methods - may be consulted depending on application.
Keywords: EN 24185, ISO 4185, weighing method, liquid flow measurement, closed conduits, weighing tank, flow-rate, measurement uncertainty, flow calibration, CEN standard.
Frequently Asked Questions
EN 24185:1993 is a standard published by the European Committee for Standardization (CEN). Its full title is "Measurement of liquid flow in closed conduits - Weighing method (ISO 4185:1980)". This standard covers: Specifies a method of determining the liquid flow-rate by measuring the mass of liquid delivered into a weighing tank in a known time intervall. Deals in particular with the measuring apparatus, the procedure, the method for calculating the flow-rate and the uncertainties associated with the measurement. Does not cover the cases of corrosive or toxic liquids.
Specifies a method of determining the liquid flow-rate by measuring the mass of liquid delivered into a weighing tank in a known time intervall. Deals in particular with the measuring apparatus, the procedure, the method for calculating the flow-rate and the uncertainties associated with the measurement. Does not cover the cases of corrosive or toxic liquids.
EN 24185:1993 is classified under the following ICS (International Classification for Standards) categories: 17.120.10 - Flow in closed conduits. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 24185:1993 has the following relationships with other standards: It is inter standard links to EN 24185:1993/AC:1993. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 24185:1993 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Durchflußmessung von Flüssigkeiten in geschlossenen Leitungen - Wägeverfahren (ISO 4185:1980)Mesure de débit des liquides dans les conduites fermées - Méthode par pesée (ISO 4185:1980)Measurement of liquid flow in closed conduits - Weighing method (ISO 4185:1980)17.120.10Pretok v zaprtih vodihFlow in closed conduitsICS:Ta slovenski standard je istoveten z:EN 24185:1993SIST EN 24185:2001en01-julij-2001SIST EN 24185:2001SLOVENSKI
STANDARD
SIST EN
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