ISO 13577-3:2016
(Main)Industrial furnaces and associated processing equipment — Safety — Part 3: Generation and use of protective and reactive atmosphere gases
Industrial furnaces and associated processing equipment — Safety — Part 3: Generation and use of protective and reactive atmosphere gases
ISO 13577-3:2016 specifies safety requirements for generation and use of protective and reactive atmosphere gases that are part of industrial thermo-processing equipment (TPE). NOTE The general safety requirements common to TPE are provided in ISO 13577‑1 (see Introduction). ISO 13577-3:2016 deals with significant hazards, hazardous situations and events relevant to the generation and use of protective and reactive atmosphere gases created by thermochemical reactions and their use in TPE that are part of TPE as listed in Clause 4 and Clause 5, when used as intended and under the conditions foreseen by the manufacturer. It covers - pipework downstream of and including the manual isolating valve, - equipment for the generation of atmosphere gases, - additional equipment for the use of atmosphere gases in TPE, - safety devices, and - functional requirements for safety related control system for the generation and use of protective and reactive atmosphere gases. It applies to the supply of atmosphere gas, source gas, inert gas and process liquids to TPE and their removal from TPE, confined to equipment integrated in the TPE. ISO 13577-3:2016 also details the anticipated significant hazards associated with atmosphere gas systems and their use in TPE and specifies the appropriate preventative measures for the reduction or elimination of these hazards. The pressure hazard of the piping and components covered by this standard is within the maximum pressure/size relationship of group I as described in Annex C. It - specifies the requirements to be met to ensure the safety of persons and property during installation, commissioning, start up, operation, shutdown and maintenance, - does not cover the relevant risks involved in the flue gas ducting system when it is not considered a part of TPE, - is not applicable to utility supply upstream of the TPE main disconnects, - does not apply to TPE for semi-conductor devices, - does not apply to TPE with atmosphere, such as air and flue gas from an over stoichiometric combustion, - does not cover the decommissioning of the TPE, - does not cover vacuum furnaces, - does not deal with the hazard of noise which is covered in ISO 13577‑1, - is not applicable to generation and use of atmosphere gas in TPE and associated plant which is manufactured before the date of its publication, and - gives the necessary requirements for the information for use. A TPE designed according to ISO 13577-3:2016 does not create any potentially explosive atmosphere in the area around the TPE and is not designed to be located in an area with a potentially explosive or hazardous atmosphere. A table of typical protective and reactive gases is given in Annex B.
Fours industriels et équipements associés — Sécurité — Partie 3: Génération et utilisation des gaz d'atmosphère protectrice et réactive
General Information
Buy Standard
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 13577-3
First edition
2016-09-15
Industrial furnaces and associated
processing equipment — Safety —
Part 3:
Generation and use of protective and
reactive atmosphere gases
Fours industriels et équipements associés — Sécurité —
Partie 3: Génération et utilisation des gaz d’atmosphère protectrice et
réactive
Reference number
ISO 13577-3:2016(E)
©
ISO 2016
---------------------- Page: 1 ----------------------
ISO 13577-3:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 13577-3:2016(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Safety requirements and measures . 5
4.1 General . 5
4.2 Pipework . 5
4.2.1 General. 5
4.2.2 Connections . 6
4.2.3 Unconnected pipework . 6
4.2.4 Galvanic cells . 6
4.2.5 Flexible tubing and couplings . 6
4.2.6 Marking of pipework . 7
4.2.7 Soundness/Tightness . 7
4.2.8 Condensate drains . 7
4.2.9 Purge points . 7
4.2.10 Blow-off and breather pipes or conduits . 8
4.2.11 Pressure relief devices and flame arrestors on pipework . 8
4.2.12 Pressure oscillations . . 8
4.2.13 Combustible gas by-pass . 8
4.2.14 Isolation of required safety devices. 8
4.2.15 Vents . 8
4.3 Required safety devices . 9
4.3.1 Atmosphere gas control equipment . 9
4.3.2 Other safety devices .12
4.4 Requirements for the use of atmosphere gases.12
4.4.1 Prevention of potential ignitable atmospheres .12
4.4.2 Monitoring of TPE doors movements .14
4.4.3 Supervision of the means of ignition at the point of combustible
atmosphere gas discharge .14
4.4.4 Emergency safety purge .14
4.5 Change of atmosphere .15
4.5.1 General.15
4.5.2 Purge with purge gas .15
4.5.3 Purge with self-ignition .16
4.5.4 Change of atmosphere by burning .16
4.5.5 Purge by evacuation .17
4.6 Interfaces to exhaust systems for combustible or toxic atmosphere gases .17
4.6.1 Exhaust of burned gases.17
4.6.2 Gathering of gases without burning and a closed system .18
5 Additional requirements for the generation of atmosphere gases .18
5.1 General .18
5.2 Gas and process liquid supplies .18
5.2.1 Air supplies .18
5.2.2 Reaction mixture supplies .19
5.2.3 Generated atmosphere gas distribution .19
5.3 Flame detection .19
5.4 Burners generating exothermic gases .19
5.5 Special requirements for different types of generator .19
5.5.1 Requirements for endothermic generators .19
5.5.2 Requirements for exothermic generators .20
© ISO 2016 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 13577-3:2016(E)
5.6 Post-treatment of generated atmosphere gases .20
6 Verification of the safety requirements and/or measures .21
7 Information for use .24
7.1 General .24
7.2 Marking .24
7.3 Instruction handbook .24
7.3.1 General.24
7.3.2 Description of equipment .25
7.3.3 Inspection procedures .25
7.3.4 Commissioning, start-up and operating procedures .25
7.3.5 Shutdown procedures .26
7.3.6 Maintenance procedures .27
7.3.7 Documentation .27
Annex A (informative) List of significant hazards.28
Annex B (informative) Typical protective and reactive atmosphere gases .30
Annex C (normative) Allowed maximum pressure.32
Annex D (informative) Principle procedures for the change of atmosphere .37
Annex E (informative) Examples for the determination of safety integrity level SIL and
performance level PL using the risk graph method .38
Annex F (informative) Basic configuration of piping system of TPE using protective or
reactive atmosphere gases .49
Annex G (normative) Requirements specific to Japan .51
Annex H (normative) Requirements specific to the U.S.A. .53
Annex I (normative) Requirements specific to European countries .55
Annex J (informative) Overview of the terms defined in ISO 13574 (Vocabulary) .58
Bibliography .66
iv © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 13577-3:2016(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 technical committees. Each 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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 244, Industrial furnaces and associated
processing equipment.
ISO 13577 consists of the following parts, under the general title Industrial furnaces and associated
processing equipment — Safety:
— Part 1: General requirements
— Part 2: Combustion and fuel handling systems
— Part 3: Generation and use of protective and reactive atmosphere gases
— Part 4: Protective systems
© ISO 2016 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO 13577-3:2016(E)
Introduction
This part of ISO 13577 is a Type C-Standard as defined in ISO 12100.
The machinery concerned and the extent, to which hazards, hazardous situations and events are
covered, is indicated in the scope of this part of ISO 13577.
When provisions of this type C standard are different from those which are stated in type A or B
standards, the provisions of this type C standard take precedence over the provisions of the other
standards, for machines that have been designed and built according to the provisions of this type C
standard.
Compliance with product standards, e.g. ISO 22967 or ISO 22968 is not sufficient to ensure the minimum
safety requirement for TPE. This part of ISO 13577 shall always have priority for TPE.
Industrial furnaces and associated thermo-processing equipment (TPE) generally consists of the
following components:
— processing chamber (e.g. steel construction with lining and/or refractory);
— heating systems;
— protective system;
— control and instrumentation system/operator-control level.
ISO 13577-1 provides the general safety requirements common to TPE. This part of ISO 13577 details
in addition specific safety requirements for generation and use of protective and reactive atmosphere
gases that are part of TPE as listed in the scope. These requirements establish the minimum acceptable
requirements for safety functions required for various processes. Where a process is not part of the
TPE, the requirements do not apply.
For example, the minimum requirements for the opening and closing of doors on a TPE does not apply
to TPE that do not have doors in their design.
NOTE As stated in its scope, ISO 13577-1 does not cover blast furnaces, converters (in steel plants), boilers
and equipment not covered under ISO 12100.
The requirements of protective system are specified in ISO 13577-4.
If a general provision of ISO 13577-1 counters provisions in this part of ISO 13577, the provisions of this
part of ISO 13577 take precedence.
It is assumed that TPE will only be operated and maintained by trained personnel.
vi © ISO 2016 – All rights reserved
---------------------- Page: 6 ----------------------
INTERNATIONAL STANDARD ISO 13577-3:2016(E)
Industrial furnaces and associated processing
equipment — Safety —
Part 3:
Generation and use of protective and reactive
atmosphere gases
1 Scope
This part of ISO 13577 specifies safety requirements for generation and use of protective and reactive
atmosphere gases that are part of industrial thermo-processing equipment (TPE).
NOTE The general safety requirements common to TPE are provided in ISO 13577-1 (see Introduction).
This part of ISO 13577 deals with significant hazards, hazardous situations and events relevant to the
generation and use of protective and reactive atmosphere gases created by thermochemical reactions
and their use in TPE that are part of TPE as listed in Clause 4 and Clause 5, when used as intended and
under the conditions foreseen by the manufacturer.
This part of ISO 13577 covers
— pipework downstream of and including the manual isolating valve,
— equipment for the generation of atmosphere gases,
— additional equipment for the use of atmosphere gases in TPE,
— safety devices, and
— functional requirements for safety related control system
for the generation and use of protective and reactive atmosphere gases.
It applies to the supply of atmosphere gas, source gas, inert gas and process liquids to TPE and their
removal from TPE, confined to equipment integrated in the TPE.
This part of ISO 13577 also details the anticipated significant hazards associated with atmosphere gas
systems and their use in TPE and specifies the appropriate preventative measures for the reduction or
elimination of these hazards.
The pressure hazard of the piping and components covered by this standard is within the maximum
pressure/size relationship of group I as described in Annex C.
This part of ISO 13577
— specifies the requirements to be met to ensure the safety of persons and property during installation,
commissioning, start up, operation, shutdown and maintenance,
— does not cover the relevant risks involved in the flue gas ducting system when it is not considered a
part of TPE,
— is not applicable to utility supply upstream of the TPE main disconnects,
— does not apply to TPE for semi-conductor devices,
© ISO 2016 – All rights reserved 1
---------------------- Page: 7 ----------------------
ISO 13577-3:2016(E)
— does not apply to TPE with atmosphere, such as air and flue gas from an over stoichiometric
combustion,
— does not cover the decommissioning of the TPE,
— does not cover vacuum furnaces,
— does not deal with the hazard of noise which is covered in ISO 13577-1,
— is not applicable to generation and use of atmosphere gas in TPE and associated plant which is
manufactured before the date of its publication, and
— gives the necessary requirements for the information for use.
A TPE designed according to this part of ISO 13577 does not create any potentially explosive atmosphere
in the area around the TPE and is not designed to be located in an area with a potentially explosive or
hazardous atmosphere.
A table of typical protective and reactive gases is given in Annex B.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections
ISO 7005-1, Metallic flanges — Part 1: Steel flanges
ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
ISO 8434-1, Metallic tube connections for fluid power and general use — Part 1: 24 degree cone connectors
ISO 8434-2, Metallic tube connections for fluid power and general use — Part 2: 37 degree flared connectors
ISO 8434-3, Metallic tube connections for fluid power and general use — Part 3: O-ring face seal connectors
ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13574:2015, Industrial furnaces and associated processing equipment — Vocabulary
ISO 13577-1:2012, Industrial furnaces and associated processing equipment — Safety — Part 1: General
requirements
ISO 13577-2:2014, Industrial furnaces and associated processing equipment — Safety — Part 2: Combustion
and fuel handling systems
ISO 13577-4, Industrial furnace and associated processing equipment — Safety — Part 4: Protective systems
ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design
ISO 19879, Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid
power connections
2 © ISO 2016 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 13577-3:2016(E)
ISO 23551-1, Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 1: Automatic and semi-automatic valves
ISO 23551-2, Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 2: Pressure regulators
IEC 60730-2-5:2011, Automatic electrical controls for household and similar use—Part 2-5: Particular
requirements for automatic electrical burner control systems
IEC 60730-2-6:2007, Automatic electrical controls for household and similar use—Part 2-6: Particular
requirements for automatic electrical pressure sensing controls including mechanical requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13574 and the following apply.
NOTE See Annex J for the list of terms specified in ISO 13574.
3.1
safety shutdown
function that takes the TPE out of operation and brings it in a defined safe state
Note 1 to entry: The definition is different from safety shutdown according ISO 13574:2015, 2.166 which is
applicable to ISO 13577-2.
3.2
flame failure
loss of flame from the normally detected position by any cause other than the action of de-energising
the automatic shut-off valves system
Note 1 to entry: The term is used in ISO 13577-2.
3.3
gas generator
equipment that converts or modifies a fluid or a mixture of fluids (gaseous or liquid) into a gas which
can be utilized as the controlled atmosphere within the thermo-processing equipment
3.4
endothermic generator
gas generator that produces atmosphere gas by an endothermic reaction
3.5
exothermic generator
gas generator that produces atmosphere gas by an exothermic reaction
3.6
combustible atmosphere gas
any gas mixture that is capable of forming ignitable mixtures with air or oxygen under the conditions
of temperature and pressure used in the process, according to the lower explosion level (LEL) of the
actual gas mixture
3.7
inert gas
non-combustible gas which will not support combustion and does not react at all
Note 1 to entry: Nitrogen, helium and argon are typical inert gases.
© ISO 2016 – All rights reserved 3
---------------------- Page: 9 ----------------------
ISO 13577-3:2016(E)
3.8
purge gas
gas which can be used to purge a TPE
Note 1 to entry: A purge gas can safely be used for pre- and post-purging of cold and hot enclosures of TPE.
Note 2 to entry: Typically, purge gases are nitrogen, argon, helium and lean exothermic gas.
3.9
safety purge volume
volume of purge gas needed to displace either air or a combustible gas from a furnace chamber/enclosure
to achieve a volume fraction of 1 % or less oxygen and/or a non-combustible atmosphere gas and/or
25 % of the lower flammability limit
Note 1 to entry: Typically, this will be a volume equal to five times the volume of the thermo-processing equipment
chamber to be purged, if the purging gas is an inert gas.
Note 2 to entry: Non-combustible atmosphere gas as defined in 3.6.
3.10
multi-turn valve
valve which, in order to operate from the fully closed to the fully open position, requires a number of
revolutions of the operating key or handwheel to be completed
3.11
safe ignition temperature
minimum temperature at which spontaneous, safe auto-ignition of combustible gases occurs
Note 1 to entry: The safe ignition temperature has been established at 750 °C.
3.12
toxic atmosphere gas
gas which, in addition to having asphyxiating properties, also acts as a poison
3.13
internal gas generator
gas generator integrated into or directly connected to a TPE
3.14
gas control equipment
centralized mounting of components such as: pipework, safety components, pressure and flow
accessories, assembled in a functional unit
3.15
atmosphere gas
gas that is supplied into or formed in TPE in accordance with a defined specification for thermo-
processes
Note 1 to entry: Atmosphere gas is used to react with the material processed or to avoid a reaction with the
material processed.
3.16
process liquids
liquids that are supplied to TPE to create an atmosphere gas
4 © ISO 2016 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 13577-3:2016(E)
4 Safety requirements and measures
4.1 General
Protective and reactive atmosphere gases in TPE are used to react with the material processed or to
avoid a reaction with the material processed. Protective and reactive atmosphere gases are fed into the
TPE at determined points and are discharged out of the TPE at determined points too.
Protective and reactive atmosphere gases shall only be used in TPE that has been constructed to avoid
leakage of the protective and reactive atmosphere gases out of the TPE or ambient air into the TPE.
Electrical circuits shall be designed in accordance with IEC 60204-1.
A risk assessment according to ISO 12100 shall be carried out. Safety functions shall be designed in
accordance with ISO 13577-4, where the use of standards for functional safety IEC 62061, ISO 13849-1,
IEC 61511 and IEC 61508 is included. Annex E provides information for the determination of the SIL or
PL of safety-related functions covered in this part of ISO 13577.
Specific regional requirements are given in Annex G, Annex H and Annex I. The safety requirements of
Annex G, Annex H and Annex I shall ensure at least the equivalent level of safety to the requirements
given in this part of ISO 13577.
CAUTION — Toxic hazards for persons occur at lower concentrations than ha
...
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13577-3
ISO/TC 244 Secretariat: JISC
Voting begins on: Voting terminates on:
2014-07-07 2014-10-07
Industrial furnace and associated processing
equipement — Safety —
Part 3:
Generation and use of protective and reactive atmosphere
gases
Fours industriels et équipements associés — Sécurité —
Partie 3: Génération et utilisation des gaz d’atmosphère protectrice et réactive
ICS: 13.100;25.180.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13577-3:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
---------------------- Page: 1 ----------------------
ISO/DIS 13577-3:2014(E)
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
electronic, photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2014 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 13577-3
Contents Page
1 Scope.1
2 Normative References.2
3 Terms and definitions .3
4 Safety Requirements, Measures and Verification Means.6
4.1 Pipework.6
4.1.1 General .6
4.1.2 Connections.7
4.1.3 Unconnected pipework.8
4.1.4 Galvanic cells.8
4.1.5 Flexible tubing and couplings.8
4.1.6 Marking of pipework.8
4.1.7 Soundness/Tightness .8
4.1.8 Condensate drains .9
4.1.9 Purge points.9
4.1.10 Blow-off and breather pipes or conduits .9
4.1.11 Pressure relief devices and flame arrestors on pipework .9
4.1.12 Pressure oscillations .9
4.1.13 Combustible fluid by-pass .9
4.1.14 Isolation of required safety devices .10
4.1.15 Drainage points .10
4.1.16 Vents.10
4.2 Required safety devices .10
4.2.1 Gas control equipment .10
4.2.2 Marking of devices .14
4.2.3 Other safety devices .14
4.3 Requirements for the use of protective or reactive atmosphere .15
4.3.1 Prevention of potential explosive atmospheres .15
4.3.2 Monitoring of TPE doors movements and process openings.16
4.3.3 Supervision of the means of ignition at the point of combustible gas discharge.17
4.3.4 Emergency safety purge.17
4.4 Change of atmosphere.17
4.4.1 Purge with purge gas.18
4.4.2 Purge with self-ignition.18
4.4.3 Change of atmosphere by burning.19
4.4.4 Purge by evacuation .19
4.5 Interfaces to exhaust systems for combustible or toxic atmosphere gases.19
4.5.1 Exhaust of burned gases.19
4.5.2 Gathering of gases without burning and a closed system .20
5 Additional requirements for the generation of protective and reactive atmosphere gases.21
5.1 Fluid supplies .21
5.1.1 Source gas supplies.21
5.1.2 Air supplies .21
5.1.3 Reaction mixture supplies.21
5.1.4 Generated gas distribution.21
5.2 Flame detection .22
5.3 Gas atmospheric generating burners .22
5.4 Special requirements for different types of generator .22
5.4.1 Requirements for endothermic generators .22
5.4.2 Requirements for exothermic generators.23
5.5 Post-treatment of generated Gases.23
© ISO 2014 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 13577-3
6 Verification of the safety requirements and/or measures . 23
7 27
7 Information for Use. 27
7.1 General. 27
7.2 Marking . 27
7.3 Instruction handbook . 27
7.3.1 General. 27
7.3.2 Description of equipment . 28
7.3.3 Inspection procedures . 28
7.3.4 Commissioning, start-up and operating procedures. 28
7.3.5 Shutdown procedures. 29
7.3.6 Maintenance procedures . 29
7.3.7 Documentation. 30
Annex A (informative) List of significant hazards. 31
Annex B (informative) Typical protective and reactive atmosphere gases. 32
Annex C (normative) Allowed maximum pressure. 33
Annex D (informative) Principle procedures for the change of atmosphere. 38
Annex E (informative) Examples for the determination of safety integrity level SIL using the risk
graph method. 39
Annex F (informative) Basic configuration of Piping system of TPE using protective or reactive
atmosphere gases . 53
Annex G (normative) Requirements specific to Japan. 55
G.1 General. 55
G.2 Background. 55
G.3 References. 55
G.4 Requirements. 56
Annex H (normative) Requirements specific to USA. 57
H.1 General. 57
H.2 Background. 57
H.3 Normative references . 57
H.4 Requirements. 57
Annex I (normative) Requirements specific to European countries . 58
I.1 General. 58
I.2 Background. 58
I.3 Normative references . 58
I.4 Requirements. 58
iv © ISO 2014 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 13577-3
Figures Page
Figure C.1 — Piping referred to in clause a) group 1 of Annex C.34
Figure C.2 — Piping referred to in clause a) group 2 of Annex C.35
Figure C.3 — Piping referred to in clause b) group 1 of Annex C.36
Figure C.4 — Piping referred to in clause b) group 2 of Annex C.37
Figure D.1 — Principle procedures for the change of atmosphere.38
© ISO 2014 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/DIS 13577-3
Tables Page
Table 1 — Verification of the safety requirements and/or measures . 23
Table A 1 — List of significant hazards . 31
Table B 1 — Typical protective and reactive atmosphere gases . 32
Table E 1 - Example of SIL determination according to IEC 62061 for a multi chamber furnace at an inside
temperature > 750°C . 40
Table E 2 - Example of PL determination according to ISO 13849-1 for a multi-chamber furnace at an inside
temperature > 750°C . 46
Figure F 1 - Basic configuration of piping system of TPE using protective or reactive atmosphere gases . 53
vi © ISO 2014 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/DIS 13577-3
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
technical committees. Each 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, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13577-3 was prepared by Technical Committee ISO/TC 244, Industrial funaces and associated
processing equipment, Subcommittee SC , .
This second/third/. edition cancels and replaces the first/second/. edition (), [clause(s) / subclause(s) /
table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.
ISO 13577 consists of the following parts, under the general title Industrial furnaces and associated
processing equipment — Safety:
Part 1: General requirements;
Part 2: Combustion and fuel handling systems
Part 3: Generation and use of protective and reactive atmosphere gases
Part 4: Protective Systems
© ISO 2014 – All rights reserved vii
---------------------- Page: 7 ----------------------
ISO/DIS 13577-3
Introduction
This document is a Type C-Standard as defined in ISO 12100.
The machinery concerned and the extent, to which hazards, hazardous situations and events are covered, is
indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of the other standards, for machines
that have been designed and built according to the provisions of this type C standard.
This DIS 13577-3 assumes that the equipment is not creating any potentially explosive atmosphere and is
located in a normally ventilated area.
Compliance with product standards e. g. ISO 22967 or ISO 22968 is not sufficient to ensure the minimum
safety requirement for TPE. This DIS shall always have priority for TPE.
Industrial Furnaces and Associated Processing Equipment (TPE) generally consists of the following
components:
Processing chamber (e.g. steel construction with lining and/or refractory)
Heating systems
Protective system
Control and instrumentation system / operator-control level
TPE cover e.g. gas generators, vaporizer, dissociators, pre- and post treatment equipment.
ISO 13577-1 provides the general safety requirements common to TPE. This part of ISO 13577 details in
addition specific safety requirements for generation and use of protective and reactive fluids that are part of
TPE as listed in the scope. These requirements establish the minimum acceptable requirements for safety
functions required for various processes. Where a process is not part of the TPE, the requirements do not
apply.
Example: the minimum requirements for the opening and closing of doors on a TPE, does not apply to TPE
that do not have doors in their design.
NOTE As stated in its scope, ISO 13577-1 does not cover blast furnaces, converters (in steel plants), boilers
and equipment not covered under ISO 12100.
The requirements of protective system are specified in ISO 13577-4.
If a general provision of ISO 13577-1 counters provisions in this part of ISO 13577, the provisions of this part
of ISO 13577 takes precedence.
It is assumed that TPE will only be operated and maintained by trained personnel.
viii © ISO 2014 – All rights reserved
---------------------- Page: 8 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 13577-3
1 Industrial furnaces and associated processing equipment —
2 Safety — Part 3: Generation and use of protective and reactive
3 atmosphere gases
4 1 Scope
5 This part of ISO 13577 specifies safety requirements for generation and use of atmosphere gas that are part
6 of industrial thermo-processing equipment (TPE)
7 NOTE: The general safety requirements common to TPE are provided in ISO 13577-1 (See introduction).
8 This part of ISO 13577 deals with significant hazards, hazardous situations and events relevant to the
9 generation and use of protective or reactive fluids created by thermochemical reactions. and their use in TPE
10 that are part of TPE as listed in Clause 4 and 5, when used as intended and under the conditions foreseen by
11 the manufacturer.
12 This part of ISO 13577 covers:
13 Pipework downstream of and including the manual isolating valve
14 Equipment for the generation of atmosphere gases
15 Additional equipment for the use of atmosphere gases in TPE
16 Safety devices
17 Functional requirements for safety related control system
18 for the generation and use of protective or reactive fluids.
19 It applies to the supply of fluids to TPE and their removal from TPE, confined to equipment integrated in the
20 TPE.
21 This part of ISO 13577 also details the anticipated significant hazards associated with atmosphere gas
22 systems and their use in TPE and specifies the appropriate preventative measures for the reduction or
23 elimination of these hazards.
24 The pressure hazard of the piping and components covered by this standard is within the maximum
25 pressure/size relationship of group I as described in normative Annex C.
26 This part of ISO 13577 specifies the requirements to be met to ensure the safety of persons and property
27 during installation, commissioning, start up, operation, shutdown and maintenance.
28 This part of ISO 13577 does not cover the relevant risks involved in the flue gas ducting system when it is not
29 considered a part of TPE.
30 This part of ISO 13577 is not applicable to utility supply upstream of the TPE main disconnects.
31 This part of ISO 13577 does not apply to TPE for semi-conductor devices.
© ISO 2014 – All rights reserved 1
---------------------- Page: 9 ----------------------
ISO/DIS 13577-3
32 This standard does not apply to TPE with atmosphere:
33 As air
34 As a flue gas from an over stoichiometric combustion
35 This part of ISO 13577 not covers the decommissioning of the TPE.
36 This part of ISO 13577 not covers vacuum furnaces.
37 This International Standard also gives the necessary requirements for the information for use.
38 This Part of ISO 13577 assumes that the equipment is not creating any potentially explosive atmosphere and
39 is not designed to be located in an area with a potentially explosive atmosphere. .
40 This Part of ISO 13577 assumes that the equipment is not designed to be located in an area with hazardous
41 atmosphere.
42 This standard is not applicable to generation and use of atmosphere gas in TPE and associated plant which is
43 manufactured before the date of its publication as International Standard.
44 A table of typical protective and reactive fluids is given in Annex B.
45 This part of ISO 13577 does not deal with the hazard of noise. It's covered in ISO 13577-1.
46 2 Normative References
47 The following referenced documents are indispensable for the application of this International Standard. For
48 dated references, only the edition cited applies. For undated references, the latest edition of the referenced
49 document (including any amendments) applies.
50 ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions,
51 tolerances and designation
52 ISO 49:1994, Malleable cast iron fittings threaded to ISO 7-1
53 ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
54 tolerances and designation
55 ISO 5817:2003, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
56 excluded) - Quality levels for imperfections
57 ISO 7005-1:1992, Metallic flanges —Part 1: Steel flanges
58 ISO 7005-2:1988, Metallic flanges — Part 2: Cast iron flanges
59 ISO 7005-3:1988, Metallic flanges — Part 3: Copper alloy and composite flanges
60 ISO 8434-1:1997, Metallic tube connections for fluid power and general use — Part 1: 24° compression
61 fittings
62 ISO 8434-2:1994, Metallic tube fittings for fluid power and general use — Part 2: 37° flared fittings
63 ISO 8434-3:2005, Metallic tube connections for fluid power and general use — Part 3: O-ring face seal
64 connectors
65 ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk reduction
2 © ISO 2014 – All rights reserved
---------------------- Page: 10 ----------------------
ISO/DIS 13577-3
66 ISO 13574, Industrial furnaces and associated thermal processing equipment - Vocabulary
67 ISO 13577-1, Industrial furnaces and associated processing equipment - Safety – Part 1: General
68 requirements
69 ISO 13577-2, Industrial furnaces and associated processing equipmen – Safety – Part 2: Combustion and fuel
70 handling systems
71 ISO 13777-4, Industrial furnaces and associated processing equipment – Safety – Part 4: Protective Systems
72 ISO 13849-1:2006, Safety of machinery - Safety-related parts of control systems - Part 1: General principles
73 for design
74 ISO 19879:2005, Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid
75 power connections
76 ISO 22967:2010, Forced draught gas burners
77 ISO 22968:2010, Forced draught oil burners
78 ISO 23551-1:2012, Safety and control devices for gas burners and gas-burning appliances - Particular
79 requirements - Part 1: Automatic valves
80 ISO 23551-2: 2006, Safety and control devices for gas burners and gas-burning appliances – Particular
81 requirements - Part 2: Pressure regulators
82 ISO 23551-3:2005, Safety and control devices for gas burners and gas-burning appliances – Particular
83 requirements - Part 3: Gas/air ratio controls, pneumatic type
84 SO 23551-4:2005, Safety and control devices for gas burners and gas-burning appliances – Particular
85 requirements - Part 4: Valve-proving systems for automatic shut-off valves
86 ISO 23553-1:2007, Safety and control devices for oil burners and oil-buring appliances – Particular
87 requirements – Part 1: shut off devices for oil burners
88 IEC 61511-1:2003, Functional safety - Safety instrumented systems for the process industry sector - Part 1:
89 Framework, definitions, system, hardware and software requirements
90 IEC 62061:2005, Safety of machinery - Functional safety of safety-related electrical, electronic and
91 programmable electronic control systems
92 3 Terms and definitions
93 For the purposes of this document, the terms and definitions given in ISO 13574:— and the following apply.
94 3.1
95 protective or reactive atmosphere
96 atmosphere that is used to prevent the oxidization or decarburization of a products surface, or to change
97 property of steel such as carburizing or nitriding
98 [SOURCE: ISO 13574:—, 2.137]
99 3.2
100 flame detector device
101 shutdowndevice by which the presence of a flame is detected and signalled; it can consist of a flame sensor,
102 an amplifier and a relay for signal transmission
103 [SOURCE: ISO 13574:—, 2.65]
© ISO 2014 – All rights reserved 3
---------------------- Page: 11 ----------------------
ISO/DIS 13577-3
104 3.3
105 flame trap
106 flame arrestor
107 device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and
108 whose intended function is to allow flow but prevent the transmission of flame
109 [SOURCE: ISO 13574:—, 2.68]
110 3.4
111 automatic shut-off valve
112 valve that opens when energised and closes automatically when de-energized
113 [SOURCE: ISO 13574:—, 2.194]
114 3.5
115 safety shutdown
116 A function that takes the TPE out of operation and brings it in a defined safe state
117 NOTE The definition is different from safety shutdown according ISO 13574:--, 2.166 which is applicable to
118 ISO 13577-2.
119 3.6
120 flame failure
121 loss of flame from the normally detected position by any cause other than the action of de-energising the
122 automatic shut-off valves system
123 NOTE The term is used in ISO 13577-2.
124 3.7
125 atmosphere gas generating system (e.g. gas generator)
126 equipment that converts or modifies a fluid or a mixture of fluids (gaseous or liquid) into a gas which can be
127 utilised as the controlled atmosphere within the thermo-p
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.