Flytande bränslen

Ämnesområden: Flytande bränslen; Biobränslen
Kommittébeteckning: SIS/TK 413 (Provning av flytande och gasformiga bränslen)
Källa: CEN
Svarsdatum: den 6 apr 2023
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This document specifies a calculation procedure for the determination of iodine value (“CIV” - “calculated iodine value”), of fatty acid methyl esters (FAME) to be used either as automotive fuel for diesel engines as specified in EN 14214 [2] or heating fuel or as an extender for automotive fuel for diesel engines as specified in EN 590 [3]. Ethyl esters or esters made from fish oil and mixtures thereof are not covered by this procedure.
The calculation procedure is specified for methyl esters between C6 and C24:1. The calculation procedure uses as data entry the results from the gas chromatography determination (GC) according to EN 14103 of individual fatty acid methyl esters and is based on AOCS recommended practice Cd 1c - 85 for the determination of the iodine value of edible oil from its fatty acid composition. It is important to recognize that the latest version of EN 14103 is intended to be used for the determination of individual FAME components.
NOTE Experience from the field and from several precision evaluation campaigns in Germany and elsewhere indicates that the results of the determination of iodine value by the calculation specified here are very close to results obtained by titration with Wijs solvent according to EN 14111 [1]. Observed small differences were always found to be smaller than the reproducibility published in the actual EN 14111.
For informative purposes only, but not for cases of dispute, EN 14331 [4] may also be used to extract the FAME contents from FAME containing diesel fuels (like B5, B7, B30, etc.) and to use the contents of the individual FAME components from this method as data entry for the calculation specified in this document.
This calculation method can be used only if the evaluated sample fulfils the requirement for ester content as reported in EN 14214.
The precision statement of this test method was determined by calculation from a Round Robin exercise with iodine values in the range of 16 g iodine/100 g to 126 g iodine/100 g.
The test method is also applicable for higher iodine values; however, the precision statement is not established for iodine values above 126 g iodine/100 g.

Kommittébeteckning: SIS/TK 415 (Motorbränslen)
Källa: CEN
Svarsdatum: den 11 maj 2023
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This document specifies requirements and test methods for marketed and delivered automotive LPG (commonly known as low pressure gas or liquefied petroleum gas).
This document is applicable to automotive LPG for use in LPG engine vehicles designed to run on automotive LPG.
NOTE For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent respectively the mass fraction, μ, and the volume fraction, φ.
WARNING — Attention is drawn to the risk of fire and explosion when handling LPG and to the hazard to health arising through inhalation of excessive amounts of LPG.
LPG is a highly volatile hydrocarbon liquid which is normally stored under pressure. If the pressure is released large volumes of gas will be produced which form flammable mixtures with air over the range of approximately 2 % (V/V) to 10 % (V/V). This document involves the sampling, handling and testing of LPG. Naked flames, unprotected electrical equipment electrostatic hazards etc. are sources of ignition for LPG.
LPG in liquid form can cause cold burns to the skin. The national health and safety regulations apply.
LPG is heavier than air and accumulates in cavities. There is a danger of suffocation when inhaling high concentrations of LPG.
CAUTION — One of the tests described in this document involves the operator inhaling a mixture of air and LPG vapour. Particular attention is drawn to the cautionary statement provided in A.1, where this method is referred to.

Ämnesområden: Flytande bränslen
Kommittébeteckning: SIS/TK 415 (Motorbränslen)
Svarsdatum: den 25 maj 2023
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För användning i kalla regioner är det inte alltid tillräckligt med ett maximalt ångtryck på 65,0 kPa. Därför ska enligt EN 17867 varje land i en nationell bilaga specificera vilken flyktighetsklass för ångtryck som ska gälla under specificerade tider på året. Denna information finns i den normativa nationella bilagan NA.

En informativ nationell bilaga NB har tagits fram för att visa skillnaderna mellan drivmedellagens krav på alkylatbensin i miljöklass 1 och kraven i EN 17867