UNI EN 14236:2018 | Contatori di gas domestici a ultrasuoni
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UNI EN 14236:2018 | Contatori di gas domestici a ultrasuoni
Data entrata in vigore: 08 novembre 2018
La norma definisce i requisiti ed i metodi di prova per la costruzione, le prestazioni e la sicurezza di contatori di gas domestici a ultrasuoni di classe 1,0 e 1,5, alimentati a batterie, che usano un tubo coassiale singolo, oppure due connessioni sdoppiate. Essi sono utilizzati per misurare il volume dei gas combustibili della seconda e/o terza famiglia, come riportato nella UNI EN 437, a pressione massima di esercizio non maggiore di 0,5 bar e portata massima effettiva fino a 10 m3/h, in un campo minimo di temperatura ambiente da -10 °C +40 °C e un intervallo di temperature del gas con un minimo di 40 K.
La norma si applica ai contatori di gas dove l'elemento di misura ed il registro sono inclusi nello stesso alloggiamento.
Recepisce: EN 14236:2018
Sostituisce: UNI EN 14236:2007
http://store.uni.com/catalogo/index.php/uni-en-14236-2018.html
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In allegato Preview EN 14236:2018 riservato Abbonati
EN 14236:2018 - Ultrasonic domestic gas meters
This European Standard specifies requirements and tests for the construction, performance and safety of class 1,0 and class 1,5 battery powered ultrasonic gas meters (hereinafter referred to as meters), having co-axial single pipe, or two pipe connections, used to measure volumes of distributed fuel gases of the second and/or third family, as given in EN 437, at maximum working pressures not exceeding 0,5 bar1) and maximum actual flow rates of up to 10 m3/h over a minimum ambient temperature range of -10 °C to +40 °C, and minimum gas temperature span of 40 K, for domestic applications. This European Standard applies to meters where the measuring element and the register(s) are enclosed in the same case.
This European Standard applies to meters with and without built-in temperature conversion, that are installed in locations with vibration and shocks of low significance and in
- closed locations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity or, if specified by the manufacturer,
- open locations (outdoor without any covering) with condensing humidity or with noncondensing humidity and in locations with electromagnetic disturbances.
Unless otherwise stated, all pressures given in this European Standard are gauge pressures.
When more than one meter type is submitted for testing, then each meter type is required to be tested against this European Standard.
Clauses 1 to 15 and Annex C are for design and type testing only.
NOTE See Annex A for production requirements.
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Fonte: UNI
EVS
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