ИСО 8130-4:2021 “Прашкасти премази – Парт 4: Прорачун доње границе експлозије” (ГБ/Т 21782.4-2008) provides a calculation method of the lower explosion limit of powder coatings, то је, the minimum concentration of powder coatings in the air can form an explosive mixture.
А Префаце
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у комитету. У овај посао су укључене и владине и невладине међународне организације које су у вези са организацијама за стандардизацију. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

The procedures used to develop this document as well as those used for further maintenance are described in Part 1 ИСО/ИЕЦ директиве. Нарочито, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. Овај документ је састављен у складу са уређивачким правилима Дел 2 ИСО/ИЕЦ директиве (види исо.орг/дирецтивес).

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Any trade names used in this document are provided as information for the convenience of the user and do not constitute an endorsement.

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ИСО 8130-4-2021 – Прашкасти премази – Парт 4: Прорачун доњих граница експлозивности

This document has been prepared by Technical Committee ISO/TC 35 (Боје и лакови), Subcommittee SC 9, General test methods for paints and fading, in cooperation with the European Committee for Standardization (CEN) Technical Committee CEN/TC 139, Боје и лакови, in accordance with the Technical Cooperation Agreement (Vienna Agreement) between ISO and CEN.

The second edition removes and replaces the technically revised first edition (ИСО 8130-4:1992) и ИСО 8130-4 Technical Corrigendum 1:1993.

The main changes are as follows:

– The range has been modified to distinguish between the calculation and estimation of the lower explosion limit;

– The definition of lower explosion limit (3.1) of coating powder is clarified, and short-term LEL is introduced;

— SI unit of lower explosion limit has been corrected;

— The test report (Чланак 8) shall indicate whether the lower explosion limit has been calculated or estimated;

– The bibliography contains two new references;

– The text has been edited and revised, and the normative references have been updated;

-Some text has been moved from scope to introduction.

A list of all parts in the ISO 8130 series can be found on the ISO website.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A full list of these agencies can be found at iso.org/members.html.

ИСО 8130-4-2021 – Прашкасти премази – Парт 4: Прорачун доњих граница експлозивности

Увод
Reliable methods of measuring the lower explosive limit or total calorific value require the use of special equipment that may not be readily available.

ИСО 6184-1 gives the method for determining the explosive index of combustible dust in air. Међутим, this approach is very complex and requires considerable expertise.

The lower explosion limit can also be estimated by the sum of the total calorific value of the individual components in the paint powder. This is an estimate because it is not possible to know or obtain the total calorific value of the ingredients.

This calculation method can reduce the explosion limit, which is proved to be satisfactory when applied to coating application equipment.

Caution encourages comparison with direct methods (на пример. ИН 14034-3[2]) to determine the lower explosion limit.

1 Обим
This document specifies the method for calculating the lower explosive limit of paint powder, то је, the minimum concentration of paint powder in air to form explosive mixtures. It is based on the measurement of the total calorific value of the product, determined by the method described in ISO 1928.

ИСО 8130-4-2021 – Прашкасти премази – Парт 4: Прорачун доњих граница експлозивности

2 Normative references

The following documents are referenced in the text in such a way that some or all of their contents constitute the requirements of this document. За датиране референце, примењује се само наведена верзија. For undated references, the new version of the reference (укључујући све ревизије) примењује.

ИСО 1928, coal and coke — Determination of gross calorific value

ИСО 8130-14, coating powders — Парт 14: Vocabulary

ИСО 15528, Paints, varnishes and raw materials for paints and varnishes – Sampling

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 8130-14 and the following shall apply.

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO online browsing platform: available at iso.org/obp

– IEC Electronic Encyclopedia: доступно на елецтропедиа.орг/

3.1 Lower explosion limit
By Lyle

Powder The minimum concentration of paint powder as a mixture of powder and air below which explosion is not possible

Белешка 1: The lower limit of explosion is expressed as g/cubic meter (g ⋅ m-3).

Јавно је доступна само стандардна информативна компонента. Да бисте видели цео садржај, мораћете да купите стандарде путем формалних канала.