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ISO/DIS 25564

Petroleum and related products-Determination of the ignition quality of diesel fuels — Air flow regulation method

General information

40.20     May 11, 2026

ISO

ISO/TC 28

International Standard

75.160.20  

Scope

This document specifies a method for the determination of cetane number of diesel fuels by air flow regulation in a standard test engine.
This document is applicable to various types of diesel fuels, including vehicle diesel, bio-diesel, synthetic diesel, and similar unconventional products. The cetane number measurement range is from 0 CN to 100 CN, whereas a typical cetane number range of 25 CN to 70 CN. However, the precision for synthetic and unconventional diesel has not been established.

Life cycle

NOW

IN_DEVELOPMENT
ISO/DIS 25564
40.20 DIS ballot initiated: 12 weeks
May 11, 2026

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