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BRITISH STANDARD BS EN
14470-2:2006
Fire safety storage cabinets —
Part 2: Safety cabinets for pressurised gas cylinders
Th
2、e European Standard EN 14470-2:2006 has the status of a
British Standard
ICS 13.220.40; 71.040.10
BS EN 14470-2:2006
National foreword
This British Standard was published by BSI. It
3、 is the UK implementation of
EN 14470-2:2006.
The UK participation in its preparation was entrusted to Technical Committee
LBI/18, Laboratory furniture and fittings.
A list of organizations represented on LBI/18 can be obtained on request to its secretary.
This publication does not purport to
4、include all the necessary provisions of a contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from legal obligations.
Amd. No.
Date
Comments
5、
This British Standard was published under the authority of the Standards Policy and Strategy Committee
on 31 January 2007
? BSI 2007
ISBN 978 0 580 49984 5
Amendments issued since publication
EUROPEAN STANDARD NORME EUROPéENNE
EUROP?ISCHE NORM
EN 1447
6、0-2
August 2006
ICS;
English Version
Fire safety storage cabinets - Part 2: Safety cabinets for pressurised gas cylinders
Armoires de stockage de sécurité incendie - Partie 2 : Armoires de stockage de sécurité pour bouteilles de gaz comprimé
Feuerwiderstandsf?hig
7、e Lagerschr?nke - Teil 2: Sicherheitsschr?nke für Druckgasflaschen
This European Standard was approved by CEN on 21 July 2006.
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
8、 standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any
9、 other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Fin
10、land, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARD
11、IZATION C OM I Té EUR OP éEN DE NOR M AL I S ATI ON EUR OP ?I S C HES KOM I TEE F üR NOR M UNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
? 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
Ref.
12、 No. EN 14470-2:2006: E
Contents Page
Foreword..............................................................................................................................................................3
Introduction ......................................................
13、...................................................................................................4
1 Scope ......................................................................................................................................................5
2 Normative references ..........
14、..................................................................................................................5
3 Terms and Definitions ...........................................................................................................................5
4 Classification.............
15、.............................................................................................................................6
5 Construction...........................................................................................................................................6
5.1 Fire prote
16、ction ........................................................................................................................................6
5.2 Ventilation............................................................................................................................................
17、...6
5.3 Gas cylinder restraining........................................................................................................................7
5.4 Insertion and removal of pressurised gas cylinders ........................................................................7
5.5 Installa
18、tion of gas pipelines (for gas cylinders in use)......................................................................7
5.6 Installation of electric cables (where appropriate) .............................................................................7
6 Fire resistance........................
19、................................................................................................................7
7 Information to be supplied....................................................................................................................7
8 Manufacturer's marking and label
20、ling .................................................................................................8
Annex A (normative) Type G testing to determine fire resistance.................................................................9
A.1 Principle ................................................
21、..................................................................................................9
A.2 Testing apparatus and test methods ...................................................................................................9
A.2.1 Furnace ............................................
22、.......................................................................................................9
A.2.2 Measuring equipment............................................................................................................................9
A.2.3 Weighing system ....................
23、...............................................................................................................9
A.3 Test models ............................................................................................................................................9
A.3.1 Quantity and descript
24、ion of test models .............................................................................................9
A.3.2 Preliminary examination of the test model .......................................................................................10
A.4 Preparation of fire test .................
25、.......................................................................................................10
A.4.1 Safety cabinet.......................................................................................................................................10
A.4.2 Installation of test model .
26、...................................................................................................................10
A.4.3 Temperature measuring device placement.......................................................................................11
A.4.4 Temperature measuring device placement i
27、n the fire room ...........................................................11
A.5 Fire testing procedure .........................................................................................................................11
A.6 Test report .....................................................
28、.......................................................................................11
Annex B (informative) Approval regarding construction alterations .........................................................15
Bibliography .................................................................
29、.....................................................................................16
Foreword
This document (EN 14470-2:2006) has been prepared by Technical Committee CEN/TC 332 “Laboratory equipment”, the secretariat of which is held by DIN.
This European Standard shal
30、l be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007.
EN 14470, Fire safety storage cabinets, consists of the following parts
31、:
? Part 1: Safety storage cabinets for flammable liquids
? Part 2: Safety cabinets for pressurised gas cylinders
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belg
32、ium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Introduction
33、
This European standard describes the design and test criteria for safety cabinets used by laboratories to store pressurised gas cylinders at normal room temperature.
The cabinet is designed and constructed to ensure that in the event of fire, the contents of the cabinet do not contribute any
34、 additional risks or spread the fire for at least 15 minutes.
The cabinet is also designed and constructed to ventilate minor gas leakage within the cabinet.
Testing the cabinet under fire conditions is a normative part of this standard and the procedures and interpretation of the t
35、ests are described in detail.
The fire rating allows time for personnel to leave and fire fighters to enter the area before the pressurised gas cylinders become unstable.
1 Scope
This European standard is a product specification, giving performance requirements for fire safety cab
36、inets used for storing pressurised gas cylinders. It is applicable to cabinets with a total internal volume suitable to store pressurised gas cylinders with a total volume not exceeding 220 l, including cylinders of purging gases.
NOTE 1 This means that up to four gas cylinders of 50 l or up to t
37、hree gas cylinders of 70 l can be stored in a single cabinet.
NOTE 2 It is intended that the pressurised gas cylinders can be in use while in the cabinet.
NOTE 3 Attention is drawn to national regulations which can apply with regard to the storage and use of pressurised gas cylinders.
NOTE
38、4 The safety cabinet can be free standing, restrained to a wall or mounted on wheels or castors.
This standard is not applicable to brick enclosures, walk-in storage rooms or cabinets which do not take their weight on their base.
Requirements are given in respect to the construction of the cab
39、inet and its capacity to resist fire conditions on the outside. A type test is included, which is based on the already existing fire resistance (heating curve) tests given in EN 14470-1.
The tests described in this European Standard are type tests (for the storage of flammable liquids EN 14470-1
40、is applicable – the criteria for failure are different – see Annex A).
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition
41、 of the referenced document (including any amendments) applies.
EN 1363-1:1999, Fire resistance tests — Part 1: General requirements
EN ISO 13943:2000, Fire safety — Vocabulary (ISO 13943:2000)
ISO 3864 (all parts), Graphical symbols - Safety colours and safety signs
3 Terms and Defi
42、nitions
For the purposes of this document, the terms and definitions given in EN ISO 13943:2000 and the following apply.
3.1 type
specimen of a design manufactured with the characteristics intended for serial production
type testing
conformity testing on the basis of one or more specime
43、ns of product representative of the production
4 Classification
A gas cylinder cabinet shall be classified as one of the Types listed in Table 1.
Table 1 — Fire safety cabinet for pressurised gas cylinder Type classification
Type
Time taken for Ta to rise by 50 K
min
Te
44、st according to
EN 1363-1:1999
Ventilation connection facility required
G15
≥ 15
Yes
Yes
G30
≥ 30
Yes
Yes
G60
≥ 60
Yes
Yes
G90
≥ 90
Yes
Yes
a T is the temperature taken on the surface of the gas cylinder valve spanner flat.
5 Construction
5.1 Fire protection
The cabi
45、net shall be designed and constructed to ensure that, in the event of a fire, the contents of the cabinet do not contribute any additional risks or spread the fire for at least 15 minutes.
5.2 Ventilation
5.2.1 Cabinets shall be equipped with openings for inlet and exhaust air, which allows fo
46、r connection of an exhaust air system to the cabinet.
In a ventilated cabinet in which ventilation is taking place, with the doors closed, latched and locked, the following extraction rates shall apply:
? when using flammable and fire supporting gas, at least 10 air changes of the cabinet's v
47、olume per hour;
? when using toxic gas, at least 120 air changes of the cabinet's volume per hour.
Under the above conditions the pressure drop shall not exceed 150 Pa. The ventilation system shall maintain a lower pressure in the cabinet than in the surrounding atmosphere. Ventilation shall
48、take place on the top and bottom of the cabinet. Design of the air circulation system within the cabinet shall ensure adequate purging from minor leakage.
This shall be tested by visual inspection and by measuring the air flow and pressure drop while the cabinet is empty.
NOTE The inlet pressu
49、re drop and the number of air changes have been chosen to provide purging efficiency.
5.2.2 In the event of a fire, the inlet and exhaust vents shall close automatically. The vents' closing system shall be tested as part of the fire-resistance test in Annex A.
5.3 Gas cylinder restrain
50、ing
Within the cabinet a suitable system shall be installed to prevent gas cylinders from falling over. The system shall be suitable for the quantity and dimensions of cylinders, which can be used in accordance with the user's instruction manual.
5.4 Insertion and removal of pressurised gas cy
51、linders
The cabinet shall be constructed so that cylinders can be inserted and removed as safely as possible with minimum manual effort.
For example, when cabinet bases are above floor level a ramp and/or mechanical lifting equipment can be employed, however, these shall not be made of alumini
52、um.
5.5 Installation of gas pipelines (for gas cylinders in use)
The number of pipe penetrations through the wall or roof of the cabinet shall be restricted to the minimum necessary and a maximum of 3 for each cylinder. Unused holes/penetrations shall be sealed in accordance with the user's in
53、struction manual. The three holes should have a maximum diameter of 10 mm each.
NOTE In order to maintain the fire resistance as tested and specified in accordance with Annex A (see A.4.1), it is recommended that the pipes are made from stainless steel or from a material of similar thermal conduc
54、tivity.
5.6 Installation of electric cables (where appropriate)
The number of penetrations through the wall or roof of the cabinet shall be restricted to the minimum necessary and a maximum of 2 for each cylinder. Unused holes/penetrations shall be sealed in accordance with the user's instruct
55、ion manual. The two holes should be a maximum diameter of 20 mm each.
6 Fire resistance
The fire resistance of the cabinet for storing pressurised gas cylinders shall be determined by a type test. This type test is performed by heating the cabinet in a furnace according to the time-temperatu
56、re curve described in clause .1 of EN 1363-1:1999 and measuring the temperature increase on the surface of an empty gas cylinder within the cabinet. The temperature increase on the surface of the cylinder valve spanner flat (see Figure A.1) shall not exceed 50 K. Test details are given in Annex A.
57、
7 Information to be supplied
The cabinet manufacturer shall supply with the cabinet a user information manual, which includes at least the following:
a) instructions for correct cabinet installation;
b) maximum combined volumetric capacity of the gas cylinders stored within the cabinet;
58、
c) safety procedure instructions in the event of fire, particularly the minimum time, when after a fire, the doors can be safely opened;
d) instructions concerning the effect of gas pipes passing through (penetration of) the walls and roof of the cabinet, particularly the potential of reduced
59、 fire resistance;
e) instructions to correctly seal the unused gas pipe feeds through the cabinet (penetration to the cabinet’s walls and roof);
f) warning that storing corrosive gases will adversely affect the effectiveness of the inlet and exhaust closing mechanisms;
g) instructions
60、 to check that installation of the ventilation system, if carried out, is correctly realised (for example by using a smoke tube);
h) recommendation to undertake regular inspection and maintenance;
i) supplier’s declaration of conformity or the certificate(s) of conformity of a test house.
61、
8 Manufacturer's marking and labelling
The following which should be a legible size, shall be fixed in a visible position and on the front of the cabinet:
a) fire resistance class, specified in minutes, e.g. Type G15, G30, G60 or G90;
b) instruction that the door(s) shall be kept closed;
62、
c) safety sign in accordance with ISO 3864 as warning of pressurised gas cylinders;
d) name and/or trademark of the manufacturer;
e) model number, year of construction and, if appropriate, serial number;
f) marking of the inlet and exhaust connections to differentiate between them;
g)
63、advice to read the user instruction manual.
Annex A
(normative)
Type G testing to determine fire resistance
A.1 Principle
The safety cabinet is exposed to flames in a suitable furnace so that a standard time-temperature curve is generated as specified in clause 5. of EN 1363-1:1
64、999. The temperature increase, and the time taken until the temperature increase reaches 50 K as measured on the surface of the valve spanner flat on the empty gas cylinder valve, shall be recorded.
NOTE The fire resistance of cabinets storing pressurised gas cylinders (EN 14470-2) is not compara
65、ble with the fire resistance of cabinets to store flammable liquids (EN 14470-1) due to the different methods of measuring the temperatures involved in determining the “time taken for T to rise” see Table 1.
A.2 Testing apparatus and test methods
A.2.1 Furnace
The furnace
66、shall be arranged so that the doors, walls, roof and floor of the tested cabinet receive equal heat conditions but without flames directly touching the cabinet body.
A.2.2 Measuring equipment
Measuring equipment for monitoring the ambient temperature, furnace temperature, temperature of the wall of the cabinet and the temperature on the surface of the gas cylinder shall be in accordance with the requirements of EN 1363-1:1999.
The means of heating shall be in accordance with the require
bs英國(guó)標(biāo)準(zhǔn)】bs en 144702 fire safety storage cabinets — part 2 safety cabinets for pressurised gas cylinders
