Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — P...
This document specifies procedures for the quantitative determination of the microstructure of the butadiene portion and the content of styrene in solution-polymerized SBR (S-SBR) by Fourier transform infrared spectrometry (FTIR) with attenuated total reflection (ATR) method. The styrene content is expressed in mass fraction relative to the S-SBR. The contents of three microstructure types, i.e.…
Petroleum and related products — Determination of low concentration of sulfur in automotive fuels — ...
This document specifies an energy dispersive X-ray fluorescence (EDXRF) test method for the determination of sulfur content in automotive fuels. This document is applicable to:
— gasoline containing up to 3,7 % oxygen by mass (including those blended with ethanol up to 10 % by volume) having sulfur contents in the range of 6,9 mg/kg to 56,7 mg/kg,
— diesel fuels including those containing…
Control systems in the process industry - Electrical and instrumentation loop check
IEC 62382:2024 defines procedures and specifications for loop check, which comprises the activities between the completion of the loop construction (including installation and point-to-point checks) and the beginning of cold commissioning. This document is applicable for the construction of new plants and for expansion or retrofits (i.e. revamping) of electrical and instrument (E&I)…
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-5: Particular...
IEC 61558-2-5:2024 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 61558-2-5:2024 EXV includes the content of the references made to IEC 61558-1:2017.
IEC 61558-2-5:2024 deals with the safety of shaver transformers…
Low-voltage fuses - Part 4: Supplementary requirements for fuse-links for the protection of semicond...
IEC 60269-4:2024 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60269-4:2024 edition 6.0 and the previous IEC 60269-4:2009+AMD1:2012+AMD2:2016 CSV edition 5.2. Furthermore, comments from IEC SC 32B experts are provided to explain the reasons of the most relevant changes, or to…
Low-voltage fuses - Part 3: Supplementary requirements for fuses for operation by unskilled persons ...
IEC 60269-3:2024 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60269-3:2024 edition 5.0 and the previous IEC 60269-3:2010+AMD1:2013+AMD2:2019 CSV edition 4.2. Furthermore, comments from IEC SC 32B experts are provided to explain the reasons of the most relevant changes, or to…
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium...
IEC 61960-4:2024 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 61960-4:2024 edition 2.0 and the previous IEC 61960-4:2020 edition 1.0. Furthermore, comments from IEC SC 21A experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the…
Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to 100 kHz with regard to e...
IEC 61786-1:2013+AMD1:2024 CSV provides guidance for measuring instruments used to measure the field strength of quasi-static magnetic and electric fields that have a frequency content in the range 1 Hz to 100 kHz and with DC magnetic fields to evaluate the exposure levels of the human body to these fields. Sources of fields include devices that operate at power frequencies and produce power…
Maintenance of low voltage switchgear and controlgear and their assemblies
IEC TR 63482:2024 provides guidance for the specification and selection of the appropriate approach and for the planning and the execution of the maintenance of low-voltage switchgear and controlgear and their assemblies having a rated voltage up to and including 1 000 V AC or 1 500 V DC, and designed for a nominal frequency of the incoming supply or supplies not exceeding 1 000 Hz.
The content…
Steel and iron — Determination of molybdenum content — Thiocyanate spectrophotometric method
This document specifies a thiocyanate spectrophotometric method for the determination of molybdenum contents in steel and iron. The method is applicable to molybdenum mass fractions between 0,005 % and 0,125 %.
Vanadium and tungsten interfere with the measurement if, because of their contents, the V/Mo ratio is greater than 16 or the W/Mo ratio is greater than 8.
