ČSN EN ISO 15971 (386114)

Zemní plyn - Měření vlastností - Energetický obsah a Wobbeho číslo

Cena: 570 Kč
včetně 15 % DPH
tisk na počkání

Anotace obsahu normy

This International Standard concerns the measurement of calorific value of natural gas and natural gas substitutes by non-separative methods, i.e. methods that do not involve the determination of the gas composition nor calculation from it. It describes the principles of operation of a variety of instruments in use for this purpose, and provides guidelines for the selection, evaluation, performance assessment, installation and operation of these.
Calorific values can be expressed on a mass basis, a molar basis or, more commonly, a volume basis. The working range for superior calorific value of natural gas, on the volume basis, is usually between 30 MJ/m3 and 45 MJ/m3 at standard reference conditions (see ISO 13443). The corresponding range for the Wobbe index is usually between 40 MJ/m3 and 60 MJ/m3.
This International Standard neither endorses nor disputes the claims of any commercial manufacturer for the performance of an instrument. Its central thesis is that fitness-for-purpose in any particular application (defined in terms of a set of specific operational requirements) can be assessed only by means of a well-designed programme of experimental tests. Guidelines are provided for the proper content of these tests.

Označení ČSN EN ISO 15971 (386114)
Katalogové číslo 95589
Cena 570 Kč570
Datum schválení 1. 9. 2014
Datum účinnosti 1. 10. 2014
Jazyk angličtina (obsahuje pouze anglický originál)
Počet stran 64 stran formátu A4
EAN kód 8590963955896
Dostupnost skladem (tisk na počkání)