SIST EN 27201-2:1997

Fire protection - Fire extinguishing media - Halogenated hydrocarbons - Part 2: Code of practice for safe handling and transfer procedures (ISO 7201-2:1991)

Provides recommendations and information relevant to the health and safety of persons engaged in procedures to be used in the transfer of halon from one container to another.

Brandbekämpfung - Löschmittel - Halogenierte Kohlenwasserstoffe - Teil 2: Festlegungen für sichere Handhabung und Umfüllen (ISO 7201-2:1991)

Der vorliegende Teil von ISO 7201 Teil 2 gibt Empfehlungen für die Verfahren an, die beim Umfüllen von Halon 1211 und Halon 1301 von einem Behälter in einen anderen anzuwenden sind, um eine unnötige Emission von Halonen in die Atmosphäre zu vermeiden. Er gibt weiterhin Empfehlungen und Informationen bezüglich Gesundheit und Sicherheit von Personen, die mit dem Umfüllen befasst sind.

Protection contre l'incendie - Agents extincteurs - Hydrocarbures halogenes - Partie 2: Spécifications pour manipulation sure et transvasement (ISO 7201-2:1991)

La présente partie de l'ISO 7201 fournit des recommandations sur les procédures à utiliser pour le transfert des halons 1211 et 1301 d'un conteneur à l'autre, ce qui réduira toute émission inutile de halons dans l'atmosphère. Elle fournit également des recommandations et des informations concernant la santé et la sécurité des personnes utilisant ces procédures.

Požarna zaščita - Gasila - Halogenirani ogljikovodiki - 2. del: Praktična pravila za varno ravnanje in postopke prenosa (ISO 7201-2:1991)

General Information

• Status: Published
• Publication Date: 30-Nov-1997
• ICS: 13.220.10 - Fire-fighting
• Technical Committee: POZ - Požarna varnost
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-1997
• Due Date: 01-Dec-1997
• Completion Date: 01-Dec-1997
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: EN 27201-2:1994 - Fire protection - Fire extinguishing media - Halogenated hydrocarbons - Part 2: Code of practice for safe handling and transfer procedures (ISO 7201-2:1991)

Overview

EN 27201-2:1994 (ISO 7201-2:1991) - Fire protection: Fire extinguishing media - Halogenated hydrocarbons - Part 2 - is a code of practice for the safe handling and transfer procedures of halon 1211 and halon 1301. The standard provides practical recommendations to reduce emissions to the atmosphere and to protect the health and safety of personnel involved in filling, emptying, transferring and recovering halon from containers and fire-extinguishing equipment.

Key topics and technical requirements

• Scope and definitions
  • Covers transfer, filling, refilling, emptying and recovery of halon 1211 and halon 1301.
  • Uses the term “halon” to refer specifically to halon 1211 and halon 1301 in this part.
• Health and exposure limits
  • Occupational exposure limit: 1000 ppm (8 h TWA).
  • Short-term volunteer tests: safe 1-minute exposures reported as 7–10% v/v for halon 1301 and 4–5% v/v for halon 1211; avoid prolonged or higher exposures.
  • Decomposition produces corrosive acids (HF, HCl, HBr) and free halogens with a sharp acrid odor - a warning of danger.
• Pressure and equipment safety
  • Use dry nitrogen for overpressurization; nitrogen moisture must be very low (≈ 0.006% m/m).
  • Nitrogen cylinders require a pressure‑reducing valve, an outlet pressure gauge and a pressure‑relief device (bursting discs not suitable).
  • Transfer and recovery rigs must withstand a test pressure of at least twice the anticipated normal working pressure and be leak‑tested regularly.
• Transfer methods
  • Nitrogen overpressurization and pumping are described; positive displacement pumps must allow recycle of halon back to supply to prevent overrun.
  • Hoses and pipe runs should be short; fittings and valves must be checked for leaks.
• Contamination control and materials
  • Avoid mixing halon types (complicates reprocessing).
  • Prevent oil, water and moisture ingress (moisture can cause corrosion/hydrolysis).
  • Halons are generally inert to common materials, but manufacturers’ data should be consulted.
• Operational controls
  • Separate filling/refilling and recovery operations to avoid contamination.
  • Receiving containers must be suitable pressure vessels, clearly labelled and not overfilled (weighing recommended).
  • Recovered halon must meet ISO 7201-1 specifications before reuse; otherwise reprocess.

Applications and users

• Practical guidance for: fire protection engineers, fire extinguisher service technicians, maintenance teams for fixed halon systems, hazardous-materials handlers, and organizations performing halon recovery and recycling.
• Useful where halon 1211 and halon 1301 are handled: filling facilities, fire‑equipment servicing, decommissioning of halon systems, and environmental compliance programs aimed at minimizing ozone-depleting emissions.

Related standards

• ISO 7201-1 / EN 27201-1 - Specifications for halon 1211 and halon 1301
• ISO 5923 - Carbon dioxide extinguishing media
• ISO 7202 / ISO 7203 series - Other extinguishing media and foam standards

Keywords: halon, halon 1211, halon 1301, EN 27201-2, ISO 7201-2, fire protection, safe handling, transfer procedures, halon recovery.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-1997
3RåDUQD]DãþLWD*DVLOD+DORJHQLUDQLRJOMLNRYRGLNLGHO3UDNWLþQDSUDYLOD]D
YDUQRUDYQDQMHLQSRVWRSNHSUHQRVD,62
Fire protection - Fire extinguishing media - Halogenated hydrocarbons - Part 2: Code of
practice for safe handling and transfer procedures (ISO 7201-2:1991)
Brandbekämpfung - Löschmittel - Halogenierte Kohlenwasserstoffe - Teil 2:
Festlegungen für sichere Handhabung und Umfüllen (ISO 7201-2:1991)
Protection contre l'incendie - Agents extincteurs - Hydrocarbures halogenes - Partie 2:
Spécifications pour manipulation sure et transvasement (ISO 7201-2:1991)
Ta slovenski standard je istoveten z: EN 27201-2:1994
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
7201-2
STANDARD
First edi tion
Fire extinguishing media - Halogenated
hydrocarbons -
Part 2:
Code of practice for safe handling and transfer
procedures of halon 1211 and halon 1301
Agents extincteurs - Hydrocarbures halog&& -
Partie 2: Code de bonne pratique pour les prockdures de manipulation
et de transfert sans danger des halons 1211 et 1301
Reference number
ISO 7201-2: 1991 (E)
ISO 7201~2:1991(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technieal committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take pati in the
werk- ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 d/o of the member
bodies casting a vote.
International Standard ISO 7201-2 was prepared by Technical Committee
ISO/TC 21, Equipment for fire profection and fire fighting, Sub-Committee
SC 6, Extinguishing media for fire fighting.
ISO 7201 consists of the following Parts, under the general title Fire ex-
- Halogenated hydrocarbons:
tinguishing media
- Part 1: Specifications for halon 1211 and halon 1301
- Part 2: Code of practice for safe handling and transfer procedures
of halon 1211 and halon 1301
0 ISO 1991
All rfghts reserved. No part of this publication may be reproduced or utilized In any form
or by any means, electronie or mechanical, including photocopying and mfcrofilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerl and
Printed in Switrerland
ii
.., *
*’
/ -_
ISO 7201=2:1991(E)
Introduction
ISO 7201 is one of a series giving specifications for fit-e extinguishing
media in common use and which are in need of standardization for fit-e
frghting purposes. This series includes at present the following lnter-
national Standards:
ISO 5923:1989, Fire protection - Fire extinguishing media - Carbon di-
Oxide
ISO 7202:1987, Fire protection - Fire extinguishing media - Powder
- Extinguishing media - Foam - Part 1:
ISO 72034 :-, Fire pro tec tion
Low expansion foam. (Under development,)
These specifications are designed to establish that the medium in
question has at least a minimum useful fire extinguishing capability and
tan therefore be reasonably Sold for fire extinguishing purposes.
This part of ISO 7201 gives procedures for the transfer of halon 1211 and
halon 1301 from one Container to another. These procedures tan be
applied to the filling and emptying of halon fire extinguishers and the
Containers used in halon extinguishing Systems, to the handling of halon
shipping Containers and to the recovery of halons from Containers which
are to be scrapped, cleaned, internally examined, etc.
These procedures are recommended as good practice to reduce un-
necessary emission of these halons which may have a damaging effect
on the atmosphere.
This page intentionally Ie0 blank

- --
ISO 7201-23 991 (E)
INTERNATIONAL STANDARD
Fire extinguishing media - Halogenated hydrocarbons -
Part 2:
Code of practice for safe handling and transfer procedures of
halon 1211 and halon 1301
3.1 halon: Halogenated hydrocarbon used as a fire
1 Scope
extinguishing medium.
This part of ISO 7201 recommends procedures to be
The term “halon(s)” is used in this patt of ISO 7201
used in the transfer of halon 1211 and halon 1301
to mean halon 1211 and halon 1301.
from one Container to another to reduce unnecess-
ary emission of these halons to the atmosphere. lt
NOTES
also provides recommendations and information
relevant to the health and safety of persons engaged
I The following numbering System is used to identify in-
in such procedures.
dividual halons. The word “halon” is followed by a num-
ber, usually comprising four digits, which represents, in
the Order given, the number of carbon, fluorine, chlorine
2 Normative reference
and bromine atoms. Where this number would terminate
with one (or more) Zero(s), such Zeros are omitted. Thus
The following Standard contains provisions which,
halon 1211 is bromochlorodifluoromethane (CF,CIBr) and
through reference in this text, constitute provisions
halon 1301 is bromotrifluoromethane (CF,Br).
of this part of ISO 7201. At the time of publication,
the edition indicated was valid. All Standards are
2 Halon 1211 is a colourless, faintly sweet-smetling gas.
Halon 1301 is a colourless, odourless gas.
subject to revision, and Parties to agreements based
on this patt of ISO 7201 are encouraged to investi-
gate the possibility of applying the most recent edi-
tion of the Standard indicated below. Members of
IEC and ISO maintain registers of currently valid
International Standards.
4 Materials for use in contact with halon
ISO 7201~1:1989, Fire protection - Fire extinguishing
1211 and halon 1301
media - Halogenated hydrocarbons - Part 1: Spec-
ifications for halon 121.1 and halon 1301.
Halon 1211 and halon 1301 are stable and inert to
most common construction materials.
3 Definition
Manufacturers’ test data should be consulted when
selecting materials suitable for use in contact with
For the purposes of this patt of ISO 7201, the fo
halons.
ing definition applies.
ISO 720192:1991(E)
7.2 Inhalation hazard
5 Avoidance of mixing and/or
contamination
7.2.1 Natura1 (undecomposed) halons
5.1 Avofdance of mixing
7.2.1.1 Effects of exposure
Halon 1211 and halon 1301 are miscible in all pro-
Tests on human volunteer subjects have shown that
portions. Halons should not be mixed because this
the maximum safe exposures are 7 % (v/v> to
will unnecessarily complicate their subsequent re-
10 % (V/V) of halon 1301 for 1 min and 4 % (V/v)
covery and reprocessing.
to 5 % (V/v) of halon 1211 for 1 min.
5.2 Avoidance of contamination
After exposure for 1 min at these concentrations, the
volunteers experienced Symptoms of dizziness and
Precautions should be taken to prevent the entry of
slight tingling of the fingers and toes. Exposures to
Oil, water and/or other foreign matter into halon
concentrations less than these for several minutes
Containers.
would be u
...