EN 1568-4:2018
(Main)Fire extinguishing media - Foam concentrates - Part 4: Specification for low expansion foam concentrates for surface application to water-miscible liquids
Fire extinguishing media - Foam concentrates - Part 4: Specification for low expansion foam concentrates for surface application to water-miscible liquids
This European Standard specifies requirements for chemical and physical properties, and minimum performance requirements of low expansion foams suitable for surface application to water-miscible liquids. Requirements are also specified for marking.
IMPORTANT - The fire performance is tested using acetone and isopropanol as the fuel, which also forms the basis for the performance classification. However, there are a large number of water-miscible liquids which have more or less different properties to acetone and isopropanol. It has been shown by tests using other fuels that the performance of various foams can differ considerably. Examples of such fuel is Methyl Ethyl Ketone (MEK). It is therefore essential that the user checks for any unfavourable or unacceptable loss of efficiency when the foam is used against fires in any other water-miscible fuels than acetone and isopropanol respectively. The fire test conditions and procedure given in H.2 can be used in order to achieve results comparative with acetone and isopropanol respectively and related requirements.
It is also essential for the user to note that other fuel depths and methods of application than those specified in H.2 can cause considerable loss of efficiency and these matters should be carefully considered by the user when assessing the suitability for particular applications.
WARNING - Any type approval according to this standard is invalidated by any change in composition of the approved product.
NOTE Some concentrates conforming to this part of the EN 1568 series can also conform to other parts and therefore can also be suitable for application as medium and/or high expansion foams.
Feuerlöschmittel - Schaummittel - Teil 4: Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf mit Wasser mischbare Flüssigkeiten
Diese Europäische Norm legt Anforderungen an chemische und physikalische Eigenschaften und Mindestanforderungen an die Leistungsfähigkeit von Schwerschäumen fest, die für die Aufgabe auf mit Wasser mischbare, brennbare Flüssigkeiten geeignet sind. Anforderungen an die Kennzeichnung sind ebenfalls festgelegt.
WICHTIG - Die Löschwirksamkeit wird mit Propan 2 on und Isopropanol als Brennstoffe geprüft, die ebenfalls auch als Grundlage für die Einteilung in Löschleistungsstufen verwendet werden. Es gibt jedoch eine große Anzahl von wassermischbaren (polaren) Flüssigkeiten, die gegenüber Propan 2 on bzw. Isopropanol mehr oder weniger unterschiedliche Eigenschaften aufweisen. Es wurde bei Prüfungen unter Verwendung anderer Brennstoffe nachgewiesen, dass verschiedene Schaummittel in ihrer Löschleistung beträchtlich abweichen können. Beispiel für einen solchen Brennstoff ist Methyl Ethyl Keton (MEK). Es ist daher von Bedeutung, dass der Anwender beim Einsatz von Schaum gegen Brände mit einem anderen wassermischbaren (polaren) Brennstoff als Propan 2 on bzw. Isopropanol diese auf unvorteilhaften oder unannehmbaren Wirksamkeitsverlust überprüft. Es können die in H.2 angegebenen Bedingungen und Verfahren der Brandprüfung angewendet werden, um Ergebnisse zu erreichen, die mit Propan 2 on bzw. Isopropanol und zugehörigen Anforderungen vergleichbar sind.
Es ist für den Anwender auch von Bedeutung, dass er beachtet, dass andere, von H.2 abweichende, Brennstofftiefen und Aufgabeverfahren einen beträchtlichen Wirkungsverlust verursachen können, und diese Faktoren sollten vom Anwender sorgfältig beachtet werden, wenn er die Eignung für eine besondere Aufgabe bewertet.
WARNUNG - JEDER TYP-PRÜFBESCHEID NACH DIESER NORM WIRD BEI ÄNDERUNG DER ZUSAMMENSETZUNG DES GEPRÜFTEN PRODUKTES UNGÜLTIG.
ANMERKUNG Einige diesem Teil der EN 1568-Normenreihe entsprechende Schaummittel können auch mit den anderen Teilen übereinstimmen und deshalb auch für die Anwendung als Mittel und/oder Leichtschäume geeignet sein.
Agents extincteurs - Émulseurs - Partie 4 : Spécifications pour les émulseurs bas foisonnement destinés à une application à la surface de liquides ayant une affinité pour l’eau
La présente Norme européenne spécifie les exigences en matière de propriétés chimiques, physiques et de performances minimales des émulseurs bas foisonnement convenant à une application à la surface des liquides ayant une affinité pour l’eau. Des exigences concernant les marquages sont également spécifiées.
IMPORTANT - Les performances au feu sont contrôlées en utilisant de l’acétone et de l’alcool isopropylique comme combustible, ce qui constitue également la base de la classification des performances. Il existe toutefois un grand nombre de liquides ayant une affinité avec l’eau, dont les propriétés sont plus ou moins différentes de celles de l’acétone et de l’alcool isopropylique. Des essais effectués avec d’autres combustibles ont également permis de démontrer que les performances des diverses mousses pouvaient varier de façon considérable. La méthyléthylcétone (MEK) est un exemple de ces combustibles. Il est donc essentiel que l’utilisateur vérifie que la mousse ne présente pas une perte d’efficacité défavorable ou inacceptable lorsqu’elle est employée pour des feux impliquant des combustibles ayant une affinité avec l’eau, autres que l’acétone et l’alcool isopropylique. Les conditions d’essai au feu et le mode opératoire donnés en H.2 peuvent être utilisés pour obtenir des résultats comparatifs avec l’acétone et l’alcool isopropylique et les exigences correspondantes.
Il est également essentiel que l’utilisateur note que des hauteurs de combustible et des méthodes d’application autres que celles spécifiées en H.2 peuvent entraîner une perte d’efficacité considérable et il convient que ces problèmes soient considérés avec soin par l’utilisateur lors de l’évaluation de l’adaptation à des applications particulières.
AVERTISSEMENT - Toute homologation de type conforme à la présente norme est invalidée dès lors qu’une modification est apportée à la composition du produit homologué.
NOTE Il se peut que certains émulseurs conformes à la présente partie de la série de normes EN 1568 soient également conformes à d’autres parties de cette série de normes et qu’ils conviennent donc à une application comme émulseurs moyen et/ou haut foisonnement.
Gasila - Penila - 4. del: Specifikacija za penila za težko peno za površinsko uporabo pri tekočinah, topnih v vodi
V tem osnutku evropskega standarda so določene zahteve glede kemijskih in fizikalnih lastnosti ter minimalne zahteve glede delovanja nizkoekspanzijskih pen, primernih za površinsko uporabo pri tekočinah, ki se mešajo z vodo. Navedene so tudi zahteve za označevanje.
POMEMBNO – v tem delu dokumenta je preskus odziva na ogenj izveden z acetonom in izopropanolom kot gorivom, ki tvori tudi osnovo za klasifikacijo požarne odpornosti. Toda obstaja veliko tekočin, ki se mešajo z vodo in imajo bolj ali manj različne lastnosti glede na aceton in izopropanol. S preskusi z drugimi gorivi je bilo ugotovljeno, da se lahko delovanje različnih pen znatno razlikuje. Primer takšnega goriva je metiletil keton (MEK). Zato je pomembno, da uporabnik preveri, ali je prišlo do kakršne koli neugodne ali nesprejemljive izgube učinkovitosti, ko je pena uporabljena pri požarih, do katerih pride zaradi kakršnih koli drugih goriv, ki se mešajo z vodo in niso aceton ali izopropanol. Pogoji preskusa požarne odpornosti in postopek, navedeni v dodatku J.2, se lahko uporabijo za doseganje rezultatov, primerljivih s posameznimi rezultati acetona in izopropanola ter povezanimi zahtevami.
Poleg tega je pomembno tudi, da uporabnik upošteva, da lahko druge globine goriva in metode uporabe, ki so drugačne od tistih, ki so določene v dodatku I.2, povzročijo znatno izgubo učinkovitosti, zato mora uporabnik te zadeve skrbno upoštevati, ko ocenjuje primernost za določene uporabe.
Tipsko odobritev morajo izvesti neodvisni laboratoriji tretjih oseb, ki so akreditirani v skladu s standardom EN ISO/IEC 17025.
OPOZORILO: Vsakršna tipska odobritev v skladu s tem standardom je neveljavna, če pride do kakršne koli spremembe v sestavi odobrenega izdelka.
OPOMBA Nekateri koncentrati, ki so skladni s tem delom standarda EN 1568, so lahko skladni tudi z drugimi deli in so zato lahko primerni tudi za uporabo kot srednje- in/ali visokoekspanzijske pene.
General Information
Relations
Overview
EN 1568-4:2018 (CEN) specifies requirements for low expansion foam concentrates intended for surface application to water‑miscible liquids. The standard defines required chemical and physical properties, minimum performance criteria and marking/technical data sheet content. It replaces EN 1568‑4:2008 and adds tests such as freezing point, stability/separation and occupational health/ecotoxicology assessments.
Key topics and requirements
- Scope: Low expansion foam concentrates for surface application to water‑miscible fuels (e.g., alcohols, ketones).
- Performance testing: Fire performance is assessed using acetone and isopropanol as reference fuels; classifications are based on those tests (see Annex H for test fire procedure and H.2 for general conditions).
- Critical caution: Performance can differ significantly on other water‑miscible liquids (e.g., MEK). Users must verify foam efficiency on the specific fuel and can use the H.2 test procedure to obtain comparative results.
- Physical / chemical tests: sediment (before/after ageing), freezing point, viscosity (Newtonian and pseudo‑plastic), pH, surface tension and stability/separation.
- Foam attributes: determination of expansion and drainage time (before and after temperature conditioning).
- Safety and environmental: occupational health and ecotoxicological testing requirements are included (Annex M).
- Documentation & marking: required technical data sheet and container marking; any change in concentrate composition invalidates type approval.
- Test methods & annexes: normative annexes detail sampling, test apparatus and procedures (e.g., Annexes C–L, H for fire tests, K for freezing point).
Applications and users
EN 1568‑4:2018 is used by:
- Foam concentrate manufacturers for product development, type approval and labeling.
- Fire protection engineers and specifiers selecting foams for industrial sites handling water‑miscible liquids (chemical plants, refineries, terminals).
- Facility safety managers, airports, marine and transport sectors where alcohol/ketone fires are a risk.
- Certification bodies and testing laboratories conducting fire performance and environmental/health testing.
Practical considerations:
- Always confirm foam performance on the actual fuel and fuel depth/dispensing method expected in service - deviations from EN test conditions can cause significant loss of efficiency.
- Some concentrates conforming to this part may also meet other EN 1568 parts and be suitable as medium or high expansion foams.
Related standards
- EN 1568 series - Parts 1–3 (medium/high expansion, low expansion for water‑immiscible liquids)
- EN ISO 5923 (CO2)
- EN 615 (powders)
- EN 27201 series (halogenated hydrocarbons)
Keywords: EN 1568-4:2018, low expansion foam, foam concentrates, water-miscible liquids, acetone isopropanol fire test, foam performance, freezing point, viscosity, expansion and drainage, foam certification.
Frequently Asked Questions
EN 1568-4:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Fire extinguishing media - Foam concentrates - Part 4: Specification for low expansion foam concentrates for surface application to water-miscible liquids". This standard covers: This European Standard specifies requirements for chemical and physical properties, and minimum performance requirements of low expansion foams suitable for surface application to water-miscible liquids. Requirements are also specified for marking. IMPORTANT - The fire performance is tested using acetone and isopropanol as the fuel, which also forms the basis for the performance classification. However, there are a large number of water-miscible liquids which have more or less different properties to acetone and isopropanol. It has been shown by tests using other fuels that the performance of various foams can differ considerably. Examples of such fuel is Methyl Ethyl Ketone (MEK). It is therefore essential that the user checks for any unfavourable or unacceptable loss of efficiency when the foam is used against fires in any other water-miscible fuels than acetone and isopropanol respectively. The fire test conditions and procedure given in H.2 can be used in order to achieve results comparative with acetone and isopropanol respectively and related requirements. It is also essential for the user to note that other fuel depths and methods of application than those specified in H.2 can cause considerable loss of efficiency and these matters should be carefully considered by the user when assessing the suitability for particular applications. WARNING - Any type approval according to this standard is invalidated by any change in composition of the approved product. NOTE Some concentrates conforming to this part of the EN 1568 series can also conform to other parts and therefore can also be suitable for application as medium and/or high expansion foams.
This European Standard specifies requirements for chemical and physical properties, and minimum performance requirements of low expansion foams suitable for surface application to water-miscible liquids. Requirements are also specified for marking. IMPORTANT - The fire performance is tested using acetone and isopropanol as the fuel, which also forms the basis for the performance classification. However, there are a large number of water-miscible liquids which have more or less different properties to acetone and isopropanol. It has been shown by tests using other fuels that the performance of various foams can differ considerably. Examples of such fuel is Methyl Ethyl Ketone (MEK). It is therefore essential that the user checks for any unfavourable or unacceptable loss of efficiency when the foam is used against fires in any other water-miscible fuels than acetone and isopropanol respectively. The fire test conditions and procedure given in H.2 can be used in order to achieve results comparative with acetone and isopropanol respectively and related requirements. It is also essential for the user to note that other fuel depths and methods of application than those specified in H.2 can cause considerable loss of efficiency and these matters should be carefully considered by the user when assessing the suitability for particular applications. WARNING - Any type approval according to this standard is invalidated by any change in composition of the approved product. NOTE Some concentrates conforming to this part of the EN 1568 series can also conform to other parts and therefore can also be suitable for application as medium and/or high expansion foams.
EN 1568-4:2018 is classified under the following ICS (International Classification for Standards) categories: 13.220.10 - Fire-fighting. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1568-4:2018 has the following relationships with other standards: It is inter standard links to EN 1568-4:2008/AC:2010, EN 1568-4:2008, FprEN 1568-4. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 1568-4:2018 is associated with the following European legislation: EU Directives/Regulations: 305/2011. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Feuerlöschmittel - Schaummittel - Teil 4: Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf mit Wasser mischbare FlüssigkeitenAgents extincteurs - Émulseurs - Partie 4 : Spécifications pour les émulseurs bas foisonnement destinés à une application à la surface de liquides ayant une affinité pour l’eauFire extinguishing media - Foam concentrates - Part 4: Specification for low expansion foam concentrates for surface application to water-miscible liquids13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 1568-4:2018SIST EN 1568-4:2018en,fr,de01-maj-2018SIST EN 1568-4:2018SLOVENSKI
STANDARDSIST EN 1568-4:2008/AC:2010SIST EN 1568-4:20081DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1568-4
February
t r s z ICS
s uä t t rä s r Supersedes EN
s w x zæ vã t r r zEnglish Version
Fire extinguishing media æ Foam concentrates æ Part
vã Specification for low expansion foam concentrates for surface application to wateræmiscible liquids Agents extincteurs æ Émulseurs æ Partie
v ã Spécifications pour les émulseurs bas foisonnement destinés à une application à la surface de liquides ayant une affinité pour l 5eau
Feuerlöschmittel æ Schaummittel æ Teil
vã Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf mit Wasser mischbare Flüssigkeiten This European Standard was approved by CEN on
s z September
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s w x zæ vã t r s z ESIST EN 1568-4:2018
Grades of foam concentrate . 14 Annex B (normative)
Sampling of foam concentrates . 15 Annex C (normative)
Determination of percentage sediment . 16 C.1 Sampling . 16 C.2 Apparatus . 16 C.3 Procedure. 16 Annex D (normative)
Determination of viscosity for pseudo-plastic foam concentrates . 17 D.1 Pseudo-plastic foam concentrates . 17 D.2 Viscosity determination. 17 D.2.1 Apparatus . 17 D.2.2 Test temperatures . 17 D.2.3 Viscosity measurement . 17 D.2.4 Results . 18 Annex E (normative)
Temperature conditioning of foam concentrates . 19 E.1 General . 19 SIST EN 1568-4:2018
Determination of surface tension . 22 F.1 Solution of foam concentrate . 22 F.2 Procedure — Surface tension . 22 Annex G (normative)
Determination of expansion and drainage time . 23 G.1 Apparatus . 23 G.2 Temperature conditions . 23 G.3 Procedure . 23 G.4 Simulated fresh and sea water . 24 Annex H (normative)
Determination of test fire performance . 29 H.1 General . 29 H.2 General conditions . 29 H.2.1 Test series and criteria for success . 29 H.2.2 Temperature and wind speed . 29 H.2.3 Records . 29 H.2.4 Foam solution. 30 H.2.5 Fuel . 30 H.3 Fire test . 30 H.3.1 Apparatus . 30 H.3.2 Test procedure . 31 Annex I (informative)
Small-scale fire test . 33 I.1 Apparatus . 33 I.2 Test procedure . 34 I.2.1 Test conditions . 34 I.2.2 Set-up . 34 I.2.3 Fire test . 34 Annex J (informative)
Description of a radiation measurement method . 43 J.1 Evaluation . 43 J.2 General arrangement of test . 43 J.3 Technical data for radiometers . 44 J.4 Procedure . 44 Annex K (normative)
Freezing point determination . 47 K.1 General . 47 K.2 Apparatus . 47 K.3 Procedure . 47 K.4 Example of a temperature against time curve for evaluation . 48 Annex L (normative)
Stability/Separation test of foam concentrate . 49 L.1 General . 49 L.2 Apparatus . 49 L.3 Procedure . 49 Annex M (normative)
Occupational health and ecotoxicological testing . 50 SIST EN 1568-4:2018
Example of a technical data sheet . 51 Annex O (informative)
A-Deviations . 53 Bibliography . 55
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp 3.1 25 %/50 % drainage time time taken for 25 %/50 % of the volume of the original foam solution to drain out of the generated foam 3.2 Expansion (E) expansion value expansion ratio ratio of the volume of foam to the volume of the foam solution from which it was made 3.3 low expansion foam foam which has an expansion ratio less than 20 3.4 medium expansion foam foam which has an expansion ratio greater than or equal to 20 but less than 200 3.5 high expansion foam foam which has an expansion ratio greater than or equal to 200 3.6 fire-fighting foam aggregate of air-filled bubbles formed from a foam solution used for fire fighting 3.7 foam concentrate liquid which is diluted with water to produce foam solution Note 1 to entry: Annex A gives information on grades of foam concentrate. 3.8 foam solution solution of foam concentrate in water SIST EN 1568-4:2018
cm «1 4 Sediment in the foam concentrate 4.1 Sediment before ageing Any sediment in the foam concentrate sampled in accordance with Annex B, but not aged in accordance with C.1, shall be dispersible through a 180 not more than 0,25 % when tested in accordance with Annex C. 4.2 Sediment after ageing Any sediment in the foam concentrate sampled in accordance with Annex B, and aged in accordance with C.1, shall be dispersible through a 180 e not more than 1,0 % when tested in accordance with Annex C. SIST EN 1568-4:2018
(min) 25 % Burn-back time not less than (min)
A 3 15 I B 3 10
C 3 5
A 5 15 II B 5 10
C 5 5 12 Occupation health The manufacturer shall provide information as specified in Annex M. 13 Technical data sheet The manufacturer should provide information for the foam concentrate. An example of the type of information provided in a manufacturer's technical data sheet is given in Annex N. SIST EN 1568-4:2018
Grades of foam concentrate Foam concentrates are graded as follows: a) protein foam concentrates (P): these are liquids derived from hydrolysed protein materials; b) fluoroprotein foam concentrates (FP): these are protein concentrates with added fluorinated surface active agents; c) synthetic foam concentrates (S): these are based upon mixtures of hydrocarbon surface-active agents and do not contain fluoroorganic compounds; d) alcohol-resistant foam concentrates (AR): these can be suitable for use on hydrocarbon fuels, and additionally are resistant to breakdown when applied to the surface of water-miscible liquid fuels. Some alcohol-resistant foam concentrates can precipitate a polymeric membrane on the surface of alcohol; e) aqueous film-forming foam concentrates (AFFF): these are generally based on mixtures of hydrocarbon surfactants and fluorinated surface active agents and have the ability to form an aqueous film on the surface of some hydrocarbon fuels; f) film-forming fluoroprotein foam concentrates (FFFP): these are fluoroprotein foam concentrates which have the ability to form an aqueous film on the surface of some hydrocarbon fuels. g) fluorine free foam concentrates (F3): these foam concentrates are dedicated to meeting fire performance ratings and are targeting applications similar to AFFF and/or AR-foams without using fluoroorganic compounds. These foam concentrates are based upon mixtures of hydrocarbon surface-active agents and non-fluorine containing stabilizers. SIST EN 1568-4:2018
Sampling of foam concentrates The samples for testing shall be delivered by the supplier in completely filled sealable containers. The samples for testing shall be taken and delivered by the supplier using a method which provides a representative sample of the foam concentrate to be tested. NOTE Nominal 25-l containers are convenient. SIST EN 1568-4:2018
Determination of percentage sediment NOTE See Clause 4. C.1 Sampling Use a sample prepared in accordance with Annex B. Place approximately 1 l of the sample in a suitable container of nominal capacity sufficient to provide an ullage of 5 % to 10 % of the container volume. Seal the container. Ensure that any sediment is dispersed by agitating the sample container. Take two samples, testing one immediately at a temperature of (20 ± 5) °C, and the other after ageing for (24 ± 2) h at (60 ± 2) °C in a completely filled container without access to air. C.2 Apparatus C.2.1 Graduated centrifuge tubes. NOTE The centrifuge tubes described in ISO 3734 [7] are suitable. C.2.2 Centrifuge, operating at (6 000 ± 600) m s «2. NOTE The centrifuge described in ISO 3734 [7] is suitable. C.2.3 180
conforming to ISO 3310-1. C.2.4 Plastic wash bottle C.3 Procedure C.3.1 Centrifuge each sample of the concentrate for 10 min. Determine the volume of the sediment and report it as a percentage of the volume of the centrifuged sample. C.3.2 Wash the contents of the centrifuge tube onto the sieve and check whether the sediment can be dispersed through the sieve by the jet from the plastic wash bottle. SIST EN 1568-4:2018
Determination of viscosity for pseudo-plastic foam concentrates NOTE The procedure is described in EN ISO 3219:1994, Annex A or B. D.1 Pseudo-plastic foam concentrates Pseudo-plastic foam concentrates have a viscosity which decreases with increasing shear rate at constant temperature. NOTE Pseudo-plastic foam concentrates are a particular class of non-Newtonian foam concentrate. D.2 Viscosity determination D.2.1 Apparatus D.2.1.1 Rotational viscometer in accordance with EN ISO 3219 with the following parameters: — maximum shear stress
· 75 Pa; u maximum shear rate
· 600 s «1. The viscometer shall be fitted with a temperature control unit which can maintain the sample temperature within ± 1 °C of the required temperature. D.2.2 Test temperatures The viscosity of the foam concentrate shall be measured from 20 °C up to and including the lowest temperature for use claimed by the manufacturer in steps of 10 °C. Use a fresh sample for each temperature. D.2.3 Viscosity measurement If the sample contains suspended air bubbles, the sample shall be centrifuged for 10 min using the apparatus specified in C.2.1 and C.2.2 before the sample is applied in the apparatus. The viscosity measurement shall be obtained according to the following test procedure: 1) adjustment of temperature control unit; 2) setting of the gap; 3) application of the sample; 4) minimum 10 min waiting period (no shear) to reach temperature equilibrium; 5) 1 min pre-shearing at 600 s «1; 6) 1 min waiting period without shearing; 7) measure the shear stress for 10 s at each shear rate starting at the lowest shear rate (preferable at 75 s «1). SIST EN 1568-4:2018
Temperature conditioning of foam concentrates E.1 General If the foam concentrate is claimed by the supplier not to be adversely affected by storage at
« u r °C, condition the sample in accordance with E.2 and then in accordance with E.3; otherwise, condition only in accordance with E.3. E.2 Low temperature conditioning E.2.1 Apparatus E.2.1.1 Freezing chamber,
± 3) °C. E.2.1.2 Sample containers, in accordance with Annex B. NOTE More than one container can be needed to condition sufficient volume of foam concentrate for subsequent testing. E.2.2 Procedure
± 3) °C. Do not agitate the content of the container(s) at any time until the sample of foam concentrate has been divided into top and bottom half-samples (see E.4). Place the sample container(s) in the freezing chamber and maintain at the required temperature for (24 ± 1) h. At the end of this period store the container(s) for not less than 48 h and not more than 96 h in an ambient temperature of (20 ± 5) °C. Repeat 3 times so that there are four cycles of freezing and thawing before testing. E.3 High-temperature conditioning E.3.1 Apparatus E.3.1.1 Oven, capable of achieving a temperature of (60 ± 3) °C. E.3.2 Procedure Set the temperature of the oven to (60 ± 3) °C. If the foam concentrate sample has not been conditioned in accordance with E.2 use foam concentrate sampled in accordance with Annex B; otherwise use containers conditioned in accordance with E.2. Do not agitate the content of the container(s) at any time until the sample of foam concentrate has been divided into top and bottom half-samples (see E.4). Place the container(s) in the oven and maintain at required temperature for 7 d. At the end of this period store the container(s) for not less than 48 h and not more 96 h in an ambient temperature of (20 ± 5) °C. SIST EN 1568-4:2018
Key 1 air pressure pipe 2 delivery pipe diameter (8 to 15) mm 3 detachable cone and plate, diameter (25 to 35) mm, height (40 to 50) mm, distance between cone and plate (10 to 12) mm 4 sample container approximately 25 l 5 top sample 6 bottom sample Figure E.1 — Example of a suitable equipment to divide the conditioned foam concentrate into top
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Die Norm EN 1568-4:2018 legt spezifische Anforderungen an chemische und physikalische Eigenschaften sowie an die Mindestleistungsanforderungen für Schaumkonzentrate mit niedriger Expansion fest, die zur Oberflächenanwendung auf wasservermischtbaren Flüssigkeiten geeignet sind. Diese Europäische Norm ist von entscheidender Bedeutung, da sie dem Benutzer klare Richtlinien bietet, um die Wirksamkeit von Löschschaum in verschiedenen Anwendungen zu gewährleisten und somit den Brandschutz zu optimieren. Ein wesentlicher Stärke dieser Norm ist die detaillierte Beschreibung der Prüfverfahren, die mit den Brennstoffen Aceton und Isopropanol durchgeführt werden. Dies ermöglicht eine objektive Klassifizierung der Leistung von Niedrig-Expansionsschaum für den Einsatz gegen wasservermischtbare Flüssigkeiten. Dennoch wird der Benutzer darauf hingewiesen, dass die Eigenschaften anderer wasservermischtbarer Flüssigkeiten, wie beispielsweise Methyl Ethyl Ketone (MEK), erheblich von den getesteten Brennstoffen abweichen können. Daher ist es unerlässlich, die Effizienz von Schäumen in Bezug auf andere Flüssigkeiten sorgfältig zu überprüfen. Zusätzlich betont die Norm die Notwendigkeit, die Anwendungsbedingungen und -methoden genau zu berücksichtigen, da Abweichungen von den in Abschnitt H.2 festgelegten Verfahren zu einer signifikanten Effizienzreduzierung führen können. Dies stellt sicher, dass die Auswahl des Löschmittels auf die spezifischen Einsatzbedingungen abgestimmt ist, was die Relevanz der Norm in der Praxis unterstreicht. Ein weiterer wichtiger Punkt ist, dass jede Änderung der Zusammensetzung des genehmigten Produkts die Typgenehmigung gemäß dieser Norm ungültig macht. Dies gewährleistet, dass die Nutzer stets Produkte verwenden, die den festgelegten Anforderungen entsprechen, und schützt somit die Integrität des Brandschutzes. Insgesamt bietet die EN 1568-4:2018 eine umfassende Grundlage für Fachleute im Bereich des Brandschutzes, um die Effizienz und Sicherheit von Schaumkonzentraten bei der Anwendung auf wasservermischtbaren Flüssigkeiten zu beurteilen. Die Norm ist somit nicht nur technisch hochstehend, sondern auch für die Praxis von großer Bedeutung.
The EN 1568-4:2018 standard outlines critical specifications for low expansion foam concentrates tailored for surface application to water-miscible liquids. The primary scope of this European Standard focuses on establishing stringent requirements for the chemical and physical properties of these foam concentrates, along with mandatory minimum performance criteria. Such comprehensive specifications ensure that users engage with effective fire extinguishing media, particularly in scenarios involving various water-miscible liquids like acetone and isopropanol, which are utilized for standard fire performance testing. One of the significant strengths of EN 1568-4:2018 is its emphasis on actual performance validation, recognizing that certain water-miscible liquids may exhibit diverse properties that could impact the effectiveness of the foam. The inclusion of specific testing procedures allows users to assess foam performance against other fuels, expanding the applicability of the standard beyond just acetone and isopropanol. This adaptability is crucial for addressing the varying scenarios in which these foams might be utilized, considering that different fuels such as Methyl Ethyl Ketone (MEK) may present unique challenges in firefighting efforts. Additionally, the standard highlights important user responsibilities concerning the assessment of foam efficiency and acknowledges that deviations from specified fuel depths and application methods can lead to significant performance losses. This cautionary note encourages users to conduct thorough evaluations of their firefighting strategies, reinforcing the relevance of the standard in real-world applications. Furthermore, the caution regarding the invalidation of any type approval due to changes in foam concentrate composition underlines the standard's commitment to safety and efficacy, ensuring that any products used remain compliant with established specifications. The possibility for foams conforming to this part of the series to also meet requirements for medium and high expansion applications reflects a streamlined approach to foam classification, enhancing flexibility for users in selecting suitable foam concentrates based on specific needs. In summary, EN 1568-4:2018 stands out as a well-structured standard that addresses essential performance aspects of low expansion foam concentrates for water-miscible liquids, combining clarity, applicability, and user responsibility into a comprehensive guide for effective fire safety management. Its robust specifications are highly relevant in fostering safe and efficient firefighting practices in various industrial contexts.
La norme EN 1568-4:2018 représente un cadre essentiel pour l'évaluation des moyens d'extinction des incendies, en particulier en ce qui concerne les concentrés de mousse à faible expansion destinés à l'application sur des liquides miscibles dans l'eau. La portée de cette norme est clairement définie : elle établit des exigences spécifiques concernant les propriétés chimiques et physiques ainsi que les performances minimales des mousses adaptées à l'extinction d'incendies sur des surfaces de liquides divers. Les points forts de cette norme résident dans ses exigences rigoureuses qui permettent de garantir l'efficacité des mousses dans des scénarios d'incendie spécifiques. En mettant l'accent sur des tests de performance réalisés avec des combustibles comme l'acétone et l'isopropanol, la norme assure que les mousses testées sont fiables pour des applications pratiques. De plus, elle met en garde l'utilisateur sur la nécessité de vérifier l'efficacité des mousses dans des conditions d'incendie utilisant d'autres liquides miscibles dans l'eau, tels que le Methyl Ethyl Ketone (MEK). La norme aborde également des considérations importantes concernant les profondeurs de carburant et les méthodes d’application, soulignant que tout changement peut conduire à une perte significative d'efficacité. Cela souligne l'importance d'une utilisation prudente et éclairée des produits conformes à la norme. En avertissant que toute approbation de type est annulée par des changements dans la composition du produit, la norme garantit intégrité et fiabilité dans l'utilisation des mousses. Enfin, il est pertinent de noter que certains concentrés conformes à la norme EN 1568-4 peuvent également répondre aux exigences d'autres parties de la série EN 1568, ce qui élargit leur application potentielle en tant que mousses de moyenne ou haute expansion. En résumé, la norme EN 1568-4:2018 est d'une grande pertinence et constitue un outil précieux pour les professionnels de la lutte contre les incendies, garantissant que les mousses à faible expansion sont non seulement performantes mais aussi adaptées à une utilisation en toute sécurité dans une variété de situations d'urgence.
SIST EN 1568-4:2018 문서에 대한 검토는 이 표준의 중요성과 관련성을 강조합니다. 이 유럽 표준은 수용성 액체에 대한 표면 적용을 위한 저확장 폼 농축액의 화학적 및 물리적 특성, 최소 성능 요구 사항을 명확히 규정하고 있습니다. 따라서, 저확장 폼의 안전성과 효율성을 보장하는 데 큰 기여를 하고 있습니다. 이 표준의 강점 중 하나는 사용자가 다양한 수용성 액체에 대해 폼 농축액을 사용할 때 요구되는 주의 사항을 명확히 기술하고 있다는 점입니다. 특히 아세톤과 이소프로판올을 연료로 사용하여 화재 성능 테스트가 이루어지는 점은 성능 분류의 신뢰성을 높입니다. 그러나, 사용자는 이 연료들이 아닌 다른 수용성 액체의 경우 성능 저하가 발생할 수 있음을 인지해야 합니다. 이는 Methyl Ethyl Ketone (MEK)와 같은 다양한 연료들이 저확장 폼의 성능에 미치는 영향을 고려해야 한다는 것을 의미합니다. 또한, H.2에서 규정된 화재 테스트 조건 및 절차를 통해 아세톤 및 이소프로판올과 비교 가능한 성과를 얻을 수 있는 방법을 제공하는 점도 중요합니다. 따라서 사용자가 특정 응용 프로그램에 대한 적합성을 평가할 때, 표준에서 제시한 연료 깊이 및 적용 방법 외에 다른 방식이 효율성을 크게 떨어뜨릴 수 있다는 것을 명심해야 합니다. 마지막으로, 이 표준에 따라 승인된 제품의 조성에 변화가 생길 경우, 모든 종류의 승인도 무효화됨을 경고하고 있습니다. 이는 표준의 일관성과 신뢰성을 유지하는 데 중요한 요소로 작용합니다. SIST EN 1568-4:2018 표준은 저확장 폼 농축액에 대한 중요한 가이드라인을 제공하며, 이러한 내용은 해당 분야의 전문가들에게 매우 유용할 것입니다.
EN 1568-4:2018の標準は、表面に適用するための低膨張泡濃縮液に関する要求事項を詳細に記載しており、その有効性と実用性に関して重要な基準を提供しています。この文書は、化学的および物理的特性、そして水に溶ける液体に対する最低限の性能要件を明確にすることで、ユーザーが適切な消火装置を選定及び使用するための指針を示しています。 この標準の強みの一つは、アセトンおよびイソプロパノールを燃料として用いた火災性能試験を基にした性能分類の確立にあります。これにより、低膨張泡が特定の水溶性液体に対してどのように機能するかの信頼性の高い評価が可能となります。しかし、さまざまな水溶性液体の特性がアセトンやイソプロパノールと異なる場合があるため、ユーザーは他の水溶性燃料に対して泡の効率が低下する可能性を慎重に評価する必要があります。 さらに、H.2に記載された火災試験条件および手順を用いることで、アセトンやイソプロパノールに対して比較可能な結果を得ることができ、異なる用途に応じた適合性を確保するための基礎を提供します。このことは、さまざまなアプリケーションにおける実用的な評価を促進し、消火泡の選択におけるディレンマを解消します。 また、重要な警告として、承認された製品の組成に変更が生じた場合、この標準に基づくタイプ承認が無効となることが示されています。これは消火器具の安全性と効果を保障するための重要な注意点となります。さらに、このEN 1568シリーズの一部に適合する濃縮液は、他の部分にも適合する可能性があるため、中膨張または高膨張泡としての適用にも対応できる柔軟性があります。 このように、EN 1568-4:2018は低膨張泡濃縮液の仕様に関して包括的かつ詳細に定義され、その範囲と関連性は消火活動において極めて重要なものです。ユーザーは、この標準を基にして製品を選定し、適切な消火措置を講じることが求められます。
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