Fixed firefighting systems - Foam systems - Part 2: Design, construction and maintenance

This document specifies the requirements and describes the methods for design, installation, testing and maintenance of low, medium, and high expansion foam fire extinguishing systems.
Foam systems may be used to suppress the release of toxic vapours but this application is outside the scope of this document.
This document provides guidance for the design of various foam systems available to persons with knowledge and experience in determining the selection of foam fire extinguishing systems which will be effective in protecting specific hazard configurations. For the application of this standard, a risk assessment by a qualified and experienced person should be performed for both new and existing systems, however the risk assessment is outside the scope of this document.
This document does not cover a risk analysis carried out by a competent person.
Nothing in this document is intended to restrict new technologies or alternative arrangements, provided that the level of foam system performance prescribed in this standard is not lowered, and supported by documented evidence/test reports.
All foam systems are generally unsuitable for the following:
-   chemicals, such as cellulose nitrate, that release sufficient oxygen or other oxidizing agents which can sustain combustion;
-   energized unenclosed electrical equipment;
-   metals such as sodium, potassium and sodium-potassium alloys which are reactive to water;
-   hazardous, water-reactive materials such as triethyl-aluminium and phosphorous pentoxide;
-   combustible metals such as aluminium and magnesium.

Ortsfeste Brandbekämpfungsanlagen - Schaumlöschanlagen - Teil 2: Planung, Einbau und Wartung

Dieses Dokument legt die Anforderungen an die Planung, den Einbau, die Prüfung und Wartung von Schwer , Mittel  und Leichtschaumlöschanlagen fest und beschreibt die diesbezüglichen Verfahren.
Schaumlöschanlagen dürfen verwendet werden, um die Freisetzung giftiger Dämpfe zu unterdrücken, diese Anwendung liegt jedoch außerhalb des Anwendungsbereiches dieses Dokumentes.
Mit diesem Dokument wird Personen mit Kenntnissen und Erfahrungen bei der Auswahl von Schaumlöschanlagen ein Leitfaden für die Planung verschiedener Schaumlöschanlagen zur Verfügung gestellt, mit denen ein wirksamer Schutz bei speziellen Brandgefahren erzielt wird. Für die Anwendung dieser Norm sollte eine Risikobewertung durch eine qualifizierte und erfahrene Person sowohl für neue als auch für bereits vorhandene Anlagen durchgeführt werden, jedoch liegt die Risikobewertung außerhalb des Anwendungsbereichs dieses Dokumentes.
Dieses Dokument gilt nicht für eine Risikoanalyse, die von einer fachkundigen Person durchgeführt wird.
In diesem Dokument werden keinerlei Beschränkungen hinsichtlich neuer Technologien oder alternativer Lösungen vorgenommen, vorausgesetzt, das in dieser Norm vorgeschriebene Leistungsniveau der Schaumlöschanlage wird dadurch nicht herabgesetzt, und unter der Voraussetzung, dass dies durch dokumentierte Beweise/Prüfberichte unterstützt wird.
Alle Schaumlöschanlagen sind grundsätzlich ungeeignet für:
- Chemikalien wie Cellulosenitrat, die genügend Sauerstoff oder andere Oxidationsmittel freisetzen, die die Verbrennung unterstützen können;
- stromführende freiliegende elektrische Einrichtungen;
- Metalle wie Natrium, Kalium und Natrium Kalium Legierungen, die mit Wasser reagieren;
- gefährliche, mit Wasser reagierende Stoffe wie Triethylaluminium und Phosphorpentoxid;
- brennbare Metalle wie Aluminium und Magnesium.

Installations fixes de lutte contre l’incendie - Systèmes à émulseurs - Partie 2: Calcul, installation et maintenance

Le présent document spécifie les exigences et décrit les méthodes relatives au calcul, à l’installation, aux essais et à la maintenance de systèmes d’extinction à mousse bas, moyen et haut foisonnement.
Les systèmes à mousse peuvent être utilisés pour supprimer les émanations de vapeurs toxiques mais cette application n’entre pas dans le domaine d’application du présent document.
Le présent document fournit des recommandations pour le calcul des différents systèmes à mousse, destinées à des personnes ayant suffisamment de connaissances et d’expérience pour sélectionner les systèmes d’extinction à mousse qui seront efficaces dans certaines configurations de risques spécifiques. Pour la mise en oeuvre de la présente norme, il convient qu’une personne qualifiée et expérimentée réalise une évaluation des risques à la fois pour les nouveaux systèmes et les systèmes existants. Cette évaluation des risques n’entre toutefois pas dans le domaine d’application du présent document.
Le présent document ne concerne pas l’analyse des risques réalisée par une personne compétente.
Le présent document, n’a pas vocation à interdire l’usage de nouvelles technologies ou la mise en place d’installations alternatives, à condition que le niveau de performance du système à mousse prescrit par la présente norme ne soit pas abaissé, et qu’il soit justifié par des rapports d’essais/des preuves documentés.
Les systèmes à mousse ne sont généralement pas appropriés dans les cas suivants :
-   produits chimiques, tels que le nitrate de cellulose, qui libèrent de l’oxygène ou d’autres agents oxydants en quantité suffisante pour maintenir la combustion ;
-   équipements électriques non fermés sous tension ;
-   métaux tels que le sodium, le potassium et les alliages sodium-potassium qui sont réactifs à l’eau ;
-   matériaux réactifs à l’eau et dangereux tels que le triéthyl-aluminium et l’anhydride phosphorique ;
métaux combustibles tels que l’aluminium et le magnésium.

Vgrajeni gasilni sistemi - Sistemi za gašenje s peno - 2. del: Načrtovanje, izvedba in vzdrževanje

Ta dokument določa zahteve in opisuje metode za načrtovanje, namestitev, preskušanje in vzdrževanje sistemov za gašenje požarov s peno z nizko, srednjo ali visoko ekspanzijo.
Sisteme za gašenje s peno je mogoče uporabljati za zatiranje sproščanja toksičnih par, vendar ta uporaba ne spada na področje uporabe tega dokumenta.
Ta dokument podaja smernice za projektiranje različnih sistemov s peno, ki so na voljo osebam z znanjem in izkušnjami s področja izbire sistemov za gašenje požarov s peno, ki bodo učinkoviti pri varovanju določenih nevarnih konfiguracij. Za uporabo tega standarda mora usposobljena in izkušena oseba izvesti oceno tveganja za nove in obstoječe sisteme, ocena tveganja pa ne spada na področje uporabe tega dokumenta.
Ta dokument ne zajema analize tveganja, ki jo izvede kompetentna oseba.
Nobena vsebina tega dokumenta ni namenjena omejevanju novih tehnologij ali alternativnih ureditev pod pogojem, da se raven učinkovitosti delovanja sistemov za gašenje s peno, predpisana v tem standardu, ne zniža in da je to podprto z dokumentiranimi dokazili/poročili o preskušanju.
Vsi sistemi s peno so na splošno neprimerni za naslednje elemente:
– kemikalije, kot je celulozni nitrat, ki sproščajo zadostno mero kisika ali drugih oksidantov, ki lahko vzdržujejo gorenje;
– električna oprema brez ohišja, ki je pod napetostjo;
– kovine, kot so klorove, natrijeve in klorovo-natrijeve zlitine, ki reagirajo z vodo;
– nevarni materiali, ki reagirajo z vodo, kot je trietil-aluminij in fosforjev pentoksid;
– vnetljive kovine, kot sta aluminij in magnezij.

General Information

Status
Published
Publication Date
23-Apr-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
24-Apr-2019
Completion Date
24-Apr-2019

RELATIONS

Buy Standard

Standard
EN 13565-2:2018+AC:2019
English language
47 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 13565-2:2018+AC:2019
01-julij-2019
Nadomešča:
SIST EN 13565-2:2018

Vgrajeni gasilni sistemi - Sistemi za gašenje s peno - 2. del: Načrtovanje, izvedba

in vzdrževanje
Fixed firefighting systems - Foam systems - Part 2: Design, construction and
maintenance
Ortsfeste Brandbekämpfungsanlagen - Schaumlöschanlagen - Teil 2: Planung, Einbau
und Wartung

Installations fixes de lutte contre lincendie - Systèmes à émulseurs - Partie 2: Calcul,

installation et maintenance
Ta slovenski standard je istoveten z: EN 13565-2:2018+AC:2019
ICS:
13.220.10 Gašenje požara Fire-fighting
SIST EN 13565-2:2018+AC:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 13565-2:2018+AC:2019
---------------------- Page: 2 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 13.220.20 Supersedes EN 13565-2:2018
English Version
Fixed firefighting systems - Foam systems - Part 2: Design,
construction and maintenance

Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -

à émulseurs - Partie 2: Calcul, installation et Schaumlöschanlagen - Teil 2: Planung, Einbau und

maintenance Wartung

This European Standard was approved by CEN on 27 August 2018 and includes the Corrigendum issued by CEN on 24 April

2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13565-2:2018+AC:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)
Contents Page

European foreword....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

3.1 Definitions ......................................................................................................................................................... 8

3.2 Abbreviations ................................................................................................................................................ 12

4 Foam extinguishing systems .................................................................................................................... 12

4.1 General ............................................................................................................................................................. 12

4.1.1 General requirements ................................................................................................................................ 12

4.1.2 Application rates .......................................................................................................................................... 13

4.1.3 Environmental considerations ................................................................................................................ 14

4.1.4 Planning ........................................................................................................................................................... 14

4.1.5 Documentation.............................................................................................................................................. 15

4.1.6 Supplementary manual foam fire fighting provisions .................................................................... 15

4.1.7 Equipment ...................................................................................................................................................... 15

4.2 Water supply .................................................................................................................................................. 16

4.2.1 Water demand ............................................................................................................................................... 16

4.2.2 Operating time .............................................................................................................................................. 16

4.2.3 Quality of water ............................................................................................................................................ 16

4.2.4 Power supply for water pumps ............................................................................................................... 17

4.3 Foam concentrate ........................................................................................................................................ 17

4.3.1 General ............................................................................................................................................................. 17

4.3.2 Foam concentrate supply – low and medium expansion foams .................................................. 17

4.3.3 Foam concentrate pumps .......................................................................................................................... 18

4.3.4 Supplementary external connections ................................................................................................... 18

4.4 Foam proportioners .................................................................................................................................... 18

4.5 Pipework ......................................................................................................................................................... 18

4.5.1 Water and foam solution pipework ....................................................................................................... 18

4.5.2 Foam concentrate piping ........................................................................................................................... 19

4.5.3 Non Newtonian foam concentrate .......................................................................................................... 19

4.5.4 Piping of aspirated foam (including that for subsurface foam applications) ........................ 19

4.5.5 Marking ............................................................................................................................................................ 19

4.6 Foam discharge outlets and generators............................................................................................... 20

4.7 Operation and control systems ............................................................................................................... 20

4.7.1 Detection of fires .......................................................................................................................................... 20

4.7.2 Release of fixed foam extinguishing systems ..................................................................................... 20

4.7.3 Alarms .............................................................................................................................................................. 21

5 Flammable liquid storage tanks, bunds and process areas .......................................................... 21

5.1 General ............................................................................................................................................................. 21

5.2 Fixed cone roof tanks .................................................................................................................................. 23

5.2.1 General ............................................................................................................................................................. 23

5.2.2 Sub surface ..................................................................................................................................................... 24

5.2.3 Restrictions for semi-subsurface-mode ............................................................................................... 25

5.2.4 Restrictions for subsurface mode .......................................................................................................... 25

5.3 Floating roof tanks ....................................................................................................................................... 26

---------------------- Page: 4 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)

5.3.1 General ............................................................................................................................................................. 26

5.3.2 Number of foam discharge outlets for floating roof tanks ............................................................ 26

5.3.3 Rimseal protection ....................................................................................................................................... 26

5.4 Bunded/diked areas and process areas ............................................................................................... 28

6 Foam sprinkler and deluge systems ...................................................................................................... 30

6.1 Deluge systems .............................................................................................................................................. 30

6.1.1 Deluge applications ..................................................................................................................................... 30

6.1.2 Deluge limitations ........................................................................................................................................ 30

6.1.3 Deluge design ................................................................................................................................................. 30

6.2 Foam enhanced sprinkler systems ........................................................................................................ 30

6.2.1 Foam enhanced sprinkler applications ................................................................................................ 30

6.2.2 Foam enhanced sprinkler limitations ................................................................................................... 30

6.2.3 Foam enhanced sprinkler design ........................................................................................................... 30

6.3 Foam concentrate ......................................................................................................................................... 31

6.3.1 Aspirated foams ............................................................................................................................................ 31

6.3.2 Non aspirated foams .................................................................................................................................... 31

6.4 Foam proportioning .................................................................................................................................... 31

6.5 Drain and flushing connections ............................................................................................................... 31

6.6 Supplementary hose streams ................................................................................................................... 33

7 High expansion foam systems .................................................................................................................. 33

7.1 General ............................................................................................................................................................. 33

7.2 Foam concentrate ......................................................................................................................................... 34

7.3 Equipment ....................................................................................................................................................... 34

7.4 System design ................................................................................................................................................ 34

7.5 Equipment location considerations ....................................................................................................... 34

7.6 Personnel safety ............................................................................................................................................ 34

7.7 Discharge rate ................................................................................................................................................ 35

7.8 Discharge time ............................................................................................................................................... 35

8 Marine loading and unloading docks .................................................................................................... 35

8.1 Water supplies ............................................................................................................................................... 35

8.2 Foam concentrate ......................................................................................................................................... 36

8.3 Foam water monitors .................................................................................................................................. 36

8.4 Below dock foam systems .......................................................................................................................... 36

9 Aircraft hangars ............................................................................................................................................ 36

9.1 General ............................................................................................................................................................. 36

9.2 Fire detection ................................................................................................................................................. 36

9.3 System design philosophy ......................................................................................................................... 37

9.4 System duration ............................................................................................................................................ 39

9.5 Foam and water pumps .............................................................................................................................. 39

9.6 Acceptable application methods ............................................................................................................. 39

9.7 Foam types ...................................................................................................................................................... 39

9.8 Monitors ........................................................................................................................................................... 39

9.9 Foam-water deluge systems ..................................................................................................................... 39

9.10 Medium expansion systems (Type 3 hangars only) ......................................................................... 40

9.11 High expansion systems ............................................................................................................................. 40

9.12 Handlines ......................................................................................................................................................... 40

9.13 Commissioning tests .................................................................................................................................... 40

10 Liquefied flammable gases (LNG/LPG) ................................................................................................. 41

10.1 General ............................................................................................................................................................. 41

10.1.1 Liquefied Natural Gas (LNG) ..................................................................................................................... 41

10.1.2 Liquefied Petroleum Gas (LPG) ............................................................................................................... 41

10.2 Controlled burn-off ...................................................................................................................................... 41

---------------------- Page: 5 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)

10.3 Un-ignited spills ............................................................................................................................................ 41

10.4 Fire detection................................................................................................................................................. 42

10.5 Foam properties ........................................................................................................................................... 42

10.6 Foam proportioning system ..................................................................................................................... 42

10.7 Application techniques .............................................................................................................................. 42

11 Commissioning, testing, and periodic inspections........................................................................... 43

11.1 Instruction of operating personnel ....................................................................................................... 43

11.2 Commissioning .............................................................................................................................................. 43

11.2.1 General ............................................................................................................................................................. 43

11.2.2 Visual inspection .......................................................................................................................................... 43

11.2.3 Pressure tests ................................................................................................................................................ 43

11.2.4 Tests .................................................................................................................................................................. 43

11.2.5 Completion certificate ................................................................................................................................ 43

11.3 The periodic inspection and testing of foam systems ..................................................................... 44

11.3.1 General ............................................................................................................................................................. 44

11.3.2 Inspections ..................................................................................................................................................... 44

11.4 Shut-down ....................................................................................................................................................... 46

11.5 Maintenance ................................................................................................................................................... 46

11.6 Alterations ...................................................................................................................................................... 46

Bibliography ................................................................................................................................................................. 47

---------------------- Page: 6 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)
European foreword

This document (EN 13565-2:2018+AC:2019) has been prepared by Technical Committee CEN/TC 191 “Fixed

firefighting systems”, the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an identical text

or by endorsement, at the latest by October 2019, and conflicting national standards shall be withdrawn at the

latest by October 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document includes Corrigendum 1 issued by CEN on 17 April 2019.
This document supersedes ˜EN 13565-2:2018™.

This document includes the corrigendum 1 which corrects Table 9, lines 1 and 2 and the key table of Figure 2.

The start and finish of text introduced or altered by corrigendum is indicated in the text by tags ˜™.

EN 13565, Fixed firefighting systems — Foam systems consists of the following parts:

— Part 1: Requirements and test methods for components
— Part 2: Design, construction and maintenance

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

---------------------- Page: 7 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)
Introduction

Foam systems are designed to provide a homogeneous layer of bubbles, of aerated fire fighting foam concentrate

and water, over the surface of flammable liquids (Class B) and/or combustible materials (Class A). The layer of

bubbles will suppress the release of flammable vapours, exclude air, and cool the fuel and hot surfaces.

Applications for foam systems can be diverse so no one type of foam system can be prescribed. In addition, High

Expansion Foam may be used to provide total flooding of enclosures with 3 dimensional hazards of either Class

A and/or Class B fuels. Examples of the various types of foam system are set out in Table 1 below:

Table 1 — Typical uses of the various types of foam system
Hazard Low expansion Medium High expansion
expansion (indoors)
Flammable liquid storage tanks Yes No No
Tank bunds/collecting areas Yes Yes Yes
+ LNG/LPG
Process areas Yes Yes Yes
Aircraft hangers Yes < 1 400 m only Yes
Fuel transfer areas Yes Yes Yes
Plastic packaging and storage Yes No Yes
Plastic recycling Yes No No
Refuse handling and storage Yes No No
Liquefied Natural Gas No No Yes (and outdoors)
Tyre storage Yes No Yes
Rolled paper No No Yes
Marine jetties Yes Yes No
Oil filled transformers and Yes No Yes
switchgear
Cable tunnels No No Yes
LPG (Liquefied Petroleum Gas) No Yes Yes (and outdoors)
Warehouses – Class A and B fuels Yes No Yes

NOTE These examples are not prescriptive and do not preclude other uses, providing there is a fire engineering basis.

Foam systems reduce the environmental impact of fire by reducing fire effluent both into the atmosphere and

onto the ground. This is achieved through a more efficient application of fire extinguishing agent onto the seat of

fire. Compared to other extinguishing systems, the necessary application rate is significantly reduced by using

foam systems. Lower fire water damages and a reduced application of contaminated fire water in the

environment are also important advantages. Foam extinguishing systems give increased safety for the fire

fighting personnel and neighbouring communities.
---------------------- Page: 8 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)
1 Scope

This document specifies the requirements and describes the methods for design, installation, testing and

maintenance of low, medium, and high expansion foam fire extinguishing systems.

Foam systems may be used to suppress the release of toxic vapours but this application is outside the scope of

this document.

This document provides guidance for the design of various foam systems available to persons with knowledge

and experience in determining the selection of foam fire extinguishing systems which will be effective in

protecting specific hazard configurations. For the application of this standard, a risk assessment by a qualified

and experienced person should be performed for both new and existing systems, however the risk assessment

is outside the scope of this document.
This document does not cover a risk analysis carried out by a competent person.

Nothing in this document is intended to restrict new technologies or alternative arrangements, provided that the

level of foam system performance prescribed in this standard is not lowered, and supported by documented

evidence/test reports.
All foam systems are generally unsuitable for the following:

— chemicals, such as cellulose nitrate, that release sufficient oxygen or other oxidizing agents which can sustain

combustion;
— energized unenclosed electrical equipment;

— metals such as sodium, potassium and sodium-potassium alloys which are reactive to water;

— hazardous, water–reactive materials such as triethyl-aluminium and phosphorous pentoxide;

— combustible metals such as aluminium and magnesium.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes

requirements of this document. For dated references, only the edition cited applies. For undated references, the

latest edition of the referenced document (including any amendments) applies.
EN 54 (all parts), Fire detection and fire alarm systems
EN 1568 (all parts), Fire extinguishing media — Foam concentrates

EN 12094-1, Fixed firefighting systems — Components for gas extinguishing systems — Part 1: Requirements and

test methods for electrical automatic control and delay devices

EN 12259-1, Fixed firefighting systems — Components for sprinkler and water spray systems — Part 1: Sprinklers

EN 12845:2015, Fixed firefighting systems — Automatic sprinkler systems — Design, installation and maintenance

prEN 13565-1:2016, Fixed firefighting systems — Foam systems — Part 1: Requirements and test methods for

components
---------------------- Page: 9 ----------------------
SIST EN 13565-2:2018+AC:2019
EN 13565-2:2018+AC:2019 (E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in prEN 13565-1:2016 and the following

apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Definitions
3.1.1
mode of application
method for the transportation of the foam onto the surface to be protected

Note 1 to entry: 3.1.2, 3.1.3 and 3.1.4 are subdivisions of the mode of application.

3.1.2
semi-subsurface

system where foam is delivered under the surface of the fuel and directed by a floating hose onto the surface to

be protected
3.1.3
subsurface
system where foam is delivered under the surface of the liquid
3.1.4
top pouring
system where foam is delivered onto the surface to be protected
3.1.5
application rate
calculated amount
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.