Industrial furnaces and associated processing equipment — Safety — Part 2: Combustion and fuel handling systems

This part of ISO 13577 specifies the safety requirements for combustion and fuel handling systems that are part of industrial furnaces and associated processing equipment (TPE).
NOTE The general safety requirements common to TPE are provided in ISO 13577-1 (See introduction) Annex°B of ISO 13577-1 also includes a list of processes for which industrial furnaces and heating systems covered by ISO 13577 may be used.
This part of ISO 13577 deals with significant hazards, hazardous situations and events relevant to combustion and fuel handling systems as listed in Annex E, when used as intended and under the conditions foreseen by the manufacturer.
This part of ISO 13577 covers:
— fuel pipework downstream of and including the manual isolating valve;
— combustion air supply (including oxygen and oxygen enriched combustion air) and flue gas system;
— burner(s), burner system and ignition device;
— functional requirements for safety related control system.
This part of ISO 13577 applies to any oxidation with air or other gases containing free oxygen of gaseous and liquid fuels or any combustion of them to release thermal energy in TPE.
For thermal or catalytic post combustion and waste incineration, this part of ISO 13577 applies only to auxiliary burners designed to start-up and/or support the process.
The pressure hazard of the piping and components covered by this part of ISO 13577 is within the maximum pressure/size relationship of category I as described in normative Annex A.
This part of ISO 13577 also gives the necessary requirements regarding information for use.
This part of ISO 13577 does not cover hazards from heating generated by electricity.
This part of ISO 13577 does not deal with the hazards created by the release of flammable substances from the products processed in the TPE.
This part of ISO 13577 is not applicable to combustion and fuel handling systems:
— of gas welding and allied processes
— up-stream of the TPE manual isolating valve.
This part of ISO 13577 is not applicable to blast furnaces, converters (in steel plants), boilers, fired heaters (including reformer furnaces) in the petrochemical and chemical industries.
This part of ISO 13577 is not applicable to electrical cabling and power cabling upstream of the TPE control panel/protective system.
This document is not applicable to combustion and fuel handling systems manufactured before the date of its publication.

Industrielle Thermoprozessanlagen und dazugehörige Prozesskomponenten - Sicherheitsanforderungen - Teil 2: Feuerungen und Brennstoffführungssysteme (ISO/DIS 13577-2:2021)

Dieser Teil von ISO 13577 legt die Sicherheitsanforderungen an Feuerungen und Brennstoffführungs-systeme fest, die Teil von Industrieöfen und zugehörigen Prozessanlagen (TPE) sind, einschließlich Einzel- und Mehrbrennersystem in Thermoprozessanlagen und  maschinen.
ANMERKUNG   Für TPE übliche allgemeine Sicherheitsanforderungen werden in ISO 13577 1:2016 festgelegt (siehe Einleitung). ISO 13577 1:2016, Anhang B enthält auch eine Liste von Prozessen, für die in ISO 13577 behandelte industrielle Öfen und Feuerungssysteme verwendet werden können.
Dieser Teil von ISO 13577 behandelt die in Anhang A aufgeführten signifikanten Gefährdungen, Gefährdungssituationen und Ereignisse für Feuerungen und Brennstoffführungssystemen auf der Grundlage, dass diese wie vorgesehen und unter den in der Betriebsanleitung beschriebenen Bedingungen eingesetzt werden.
Dieser Teil von ISO 13577 gilt für:
—   Brennstoff-Leitungssystem in Strömungsrichtung beginnend mit dem handbetätigten Hauptabsperrventil;
—   Zuführung von Verbrennungsluft (einschließlich Sauerstoff oder sauerstoffangereicherter Verbrennungsluft) und Abgassystem;
—   Brenner, Brennersystem und Zündeinrichtungen;
—   funktionale Anforderungen an sicherheitsbezogene Steuerungen.
Dieser Teil von ISO 13577 ist anwendbar für alle Arten von Oxidation oder Verbrennung von gasförmigen oder flüssigen Brennstoffen mit Luft oder anderen Gasen, die freien Sauerstoff enthalten, die zur Freisetzung von Wärmeenergie in TPE dienen. Anhang B enthält Beispiele für gasförmige und flüssige Brennstoffe.
ANMERKUNG   Werden andere Brennstoffe wie z. B. Wasserstoff verwendet, wird eine zusätzliche Risikobewertung durchgeführt, um die Eignung der Komponenten usw. nachzuweisen.
Bei thermischen oder katalytischen Nachverbrennungsanlagen und Müllverbrennungen ist dieser Teil von ISO 13577 nur anwendbar auf Hilfsbrenner, die zum Anfahren und/oder zur Unterstützung des Prozesses dienen.
Die Druckgefährdung der Rohrleitungen und Komponenten, die in diesem Teil von ISO 13577 abgedeckt sind, liegt innerhalb des maximalen Druck-/Größenverhältnisses der Kategorie I, wie im Anhang C festgelegt.
Dieser Teil von ISO 13577 beinhaltet auch notwendige Anforderungen hinsichtlich der Benutzerinformation.
Dieser Teil von ISO 13577 behandelt nicht die durch elektrische Beheizung entstehenden Gefährdungen.
Dieser Teil von ISO 13577 behandelt nicht die Gefährdungen, die durch Freisetzung von entzündbaren Substanzen aus den in der TPE verarbeitenden Produkten entstehen.
Dieser Teil von ISO 13577 ist nicht anwendbar für Feuerungen und Brennstoffführungssysteme:
—   von Gasschweiß- und verwandten Prozessen;
—   stromaufwärts des handbetätigten TPE Hauptabsperrventils.
Dieser Teil von ISO 13577 gilt nicht für Hochöfen, Konverter (in Stahlwerken), Kessel, befeuerte Wärmeerzeuger (einschließlich Reformeröfen) in der petrochemischen und chemischen Industrie.

Fours industriels et équipements associés – Sécurité — Partie 2: Équipement de combustion et demanutention des combustibles

Industrijske peči in pripadajoča procesna oprema - Varnost - 2. del: Sistemi zgorevanja in ravnanja z gorivom

General Information

Status
Not Published
Publication Date
08-Nov-2023
Current Stage
4599 - Dispatch of FV draft to CMC - Finalization for Vote
Start Date
16-Mar-2022
Due Date
09-Apr-2023
Completion Date
16-Mar-2022

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SLOVENSKI STANDARD
oSIST prEN ISO 13577-2:2021
01-september-2021
Industrijske peči in pripadajoča procesna oprema - Varnost - 2. del: Sistemi
zgorevanja in ravnanja z gorivom

Industrial furnaces and associated processing equipment - Safety - Part 2: Combustion

and fuel handling systems
Fours industriels et équipements associés - Sécurité - Partie 2: Équipement de
combustion et demanutention des combustibles
Ta slovenski standard je istoveten z: prEN ISO 13577-2
ICS:
25.180.01 Industrijske peči na splošno Industrial furnaces in general
oSIST prEN ISO 13577-2:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 13577-2:2021
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oSIST prEN ISO 13577-2:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13577-2
ISO/TC 244 Secretariat: JISC
Voting begins on: Voting terminates on:
2021-07-06 2021-09-28
Industrial furnaces and associated processing
equipment — Safety —
Part 2:
Combustion and fuel handling systems
Fours industriels et équipements associés — Sécurité —
Partie 2: Équipement de combustion et de manutention des combustibles
ICS: 25.180.01; 13.100
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
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
ISO/CEN PARALLEL PROCESSING
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 13577-2:2021(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 2021
---------------------- Page: 3 ----------------------
oSIST prEN ISO 13577-2:2021
ISO/DIS 13577-2:2021(E)
ISO/DIS 13577-2:2021(E)
Contents

Foreword .............................................................................................................................................................. vii

Introduction ....................................................................................................................................................... viii

1 Scope ................................................................................................................................................................. 1

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

3 Terms and definitions ................................................................................................................................ 6

4 Safety requirements, measures and verification means ............................................................... 6

4.1 General ............................................................................................................................................................. 6

4.1.1 Safety objectives and basic requirements .................................................................................... 6

4.1.2 Over-temperature protection ........................................................................................................... 7

4.1.3 Accumulation of hazardous fluids ................................................................................................... 8

4.1.4 Seismic protection ................................................................................................................................. 8

4.1.5 Regional requirements ........................................................................................................................ 8

4.2 Fuel pipework ............................................................................................................................................... 8

4.2.1 General ...................................................................................................................................................... 8

4.2.2 Connections ............................................................................................................................................. 8

4.2.3 Unconnected pipework .................................................................................................................... 10

4.2.4 Galvanic cells ........................................................................................................................................ 10

4.2.5 Flexible tubing and couplings ........................................................................................................ 10

4.2.6 Marking .................................................................................................................................................. 11

4.2.7 Soundness/tightness ......................................................................................................................... 11

4.2.8 Condensate drains on gas pipework ............................................................................................ 13

4.2.9 Fuel pipe heating ................................................................................................................................ 13

4.2.10 Purge points .......................................................................................................................................... 13

4.2.11 Pressure relief devices ..................................................................................................................... 13

4.2.12 Blow-off and breather pipes or conduits ................................................................................... 14

4.2.13 Equipment supplied with different fuels ................................................................................... 14

4.2.14 By-pass.................................................................................................................................................... 14

4.2.15 Isolation of required safety devices ............................................................................................. 14

4.3 Required safety devices for gaseous fuels ....................................................................................... 14

4.3.1 Manual isolating valve ...................................................................................................................... 14

4.3.2 Filter/strainer ...................................................................................................................................... 15

4.3.3 Gas pressure regulator ..................................................................................................................... 15

4.3.4 Low gas pressure protection .......................................................................................................... 16

4.3.5 High gas pressure protection ......................................................................................................... 16

4.3.6 Automatic shut-off valves ................................................................................................................ 17

4.3.7 Valve proving ....................................................................................................................................... 18

4.3.8 Individual manual shut-off valves for burners ........................................................................ 18

4.3.9 Flame arrestor ..................................................................................................................................... 19

4.4 Gas pressure boosters ............................................................................................................................. 19

COPYRIGHT PROTECTED DOCUMENT 4.5 Required safety devices for liquid fuels ........................................................................................... 20

4.5.1 Manual isolating valve ...................................................................................................................... 20

© ISO 2021

4.5.2 Filter/strainer ...................................................................................................................................... 20

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

4.5.3 Pressure relief valve .......................................................................................................................... 20

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

4.5.4 Liquid fuel pressure regulator ....................................................................................................... 20

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.

4.5.5 Pressure regulation of auxiliary fluids ....................................................................................... 20

ISO copyright office

4.5.6 Liquid fuel pressure protection ..................................................................................................... 20

CP 401 • Ch. de Blandonnet 8

4.5.7 Liquid fuel temperature protection ............................................................................................. 21

CH-1214 Vernier, Geneva

4.5.8 Automatic shut-off valves ................................................................................................................ 21

Phone: +41 22 749 01 11
Fax: +41 22 749 09 47

4.5.9 Automatic shut-off valves for multiple burners ...................................................................... 21

Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO #### – All rights reserved iii
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 13577-2:2021
ISO/DIS 13577-2:2021(E)
Contents

Foreword .............................................................................................................................................................. vii

Introduction ....................................................................................................................................................... viii

1 Scope ................................................................................................................................................................. 1

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

3 Terms and definitions ................................................................................................................................ 6

4 Safety requirements, measures and verification means ............................................................... 6

4.1 General ............................................................................................................................................................. 6

4.1.1 Safety objectives and basic requirements .................................................................................... 6

4.1.2 Over-temperature protection ........................................................................................................... 7

4.1.3 Accumulation of hazardous fluids ................................................................................................... 8

4.1.4 Seismic protection ................................................................................................................................. 8

4.1.5 Regional requirements ........................................................................................................................ 8

4.2 Fuel pipework ............................................................................................................................................... 8

4.2.1 General ...................................................................................................................................................... 8

4.2.2 Connections ............................................................................................................................................. 8

4.2.3 Unconnected pipework .................................................................................................................... 10

4.2.4 Galvanic cells ........................................................................................................................................ 10

4.2.5 Flexible tubing and couplings ........................................................................................................ 10

4.2.6 Marking .................................................................................................................................................. 11

4.2.7 Soundness/tightness ......................................................................................................................... 11

4.2.8 Condensate drains on gas pipework ............................................................................................ 13

4.2.9 Fuel pipe heating ................................................................................................................................ 13

4.2.10 Purge points .......................................................................................................................................... 13

4.2.11 Pressure relief devices ..................................................................................................................... 13

4.2.12 Blow-off and breather pipes or conduits ................................................................................... 14

4.2.13 Equipment supplied with different fuels ................................................................................... 14

4.2.14 By-pass.................................................................................................................................................... 14

4.2.15 Isolation of required safety devices ............................................................................................. 14

4.3 Required safety devices for gaseous fuels ....................................................................................... 14

4.3.1 Manual isolating valve ...................................................................................................................... 14

4.3.2 Filter/strainer ...................................................................................................................................... 15

4.3.3 Gas pressure regulator ..................................................................................................................... 15

4.3.4 Low gas pressure protection .......................................................................................................... 16

4.3.5 High gas pressure protection ......................................................................................................... 16

4.3.6 Automatic shut-off valves ................................................................................................................ 17

4.3.7 Valve proving ....................................................................................................................................... 18

4.3.8 Individual manual shut-off valves for burners ........................................................................ 18

4.3.9 Flame arrestor ..................................................................................................................................... 19

4.4 Gas pressure boosters ............................................................................................................................. 19

4.5 Required safety devices for liquid fuels ........................................................................................... 20

4.5.1 Manual isolating valve ...................................................................................................................... 20

4.5.2 Filter/strainer ...................................................................................................................................... 20

4.5.3 Pressure relief valve .......................................................................................................................... 20

4.5.4 Liquid fuel pressure regulator ....................................................................................................... 20

4.5.5 Pressure regulation of auxiliary fluids ....................................................................................... 20

4.5.6 Liquid fuel pressure protection ..................................................................................................... 20

4.5.7 Liquid fuel temperature protection ............................................................................................. 21

4.5.8 Automatic shut-off valves ................................................................................................................ 21

4.5.9 Automatic shut-off valves for multiple burners ...................................................................... 21

© ISO #### – All rights reserved iii
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oSIST prEN ISO 13577-2:2021
ISO/DIS 13577-2:2021(E)

4.5.10 Individual manual shut-off valves for multiple burners .......................................................22

4.6 Combustion air and air/fuel ratio .......................................................................................................22

4.6.1 Combustion air system ......................................................................................................................22

4.6.2 Air flow and pressure sensing devices ........................................................................................22

4.6.3 Air/fuel ratio .........................................................................................................................................23

4.7 Supply of pre-mixed fuel gas/air .........................................................................................................23

4.7.1 Mixture pipework ...............................................................................................................................23

4.7.2 Air and gas supply to the mixture circuit ...................................................................................24

4.8 Liquid fuel atomisation ...........................................................................................................................24

4.9 Burners .........................................................................................................................................................24

4.9.1 Main burners ........................................................................................................................................24

4.9.2 Radiant tube burner systems ..........................................................................................................25

4.9.3 Ignition device/pilot burner ...........................................................................................................25

4.9.4 Permanent pilots .................................................................................................................................25

4.9.5 Burner capacity control ....................................................................................................................25

4.9.6 Flue gas venting ...................................................................................................................................26

4.9.7 Removal of residual fuel ...................................................................................................................26

4.10 Automatic burner control systems ...............................................................................................27

4.10.1 General ....................................................................................................................................................27

4.10.2 Low-temperature equipment .........................................................................................................27

4.10.3 High-temperature equipment ........................................................................................................27

4.10.4 Automatic burner control systems for burners operating in the open air ....................28

4.10.5 Flame supervision for line-burners .............................................................................................29

4.11 Start-up of the heating system and burner ignition ...............................................................29

4.11.1 Pre-purging of the combustion chamber ....................................................................................29

4.11.2 Start-up of the fuel supply ................................................................................................................31

4.11.3 Start fuel flow rate ..............................................................................................................................31

4.11.4 Ignition ....................................................................................................................................................31

4.11.5 Maximum safety times for gas-fired natural draught burners ...........................................32

4.11.6 Maximum safety times for forced and induced draught gas-fired burners ...................32

4.11.7 Maximum safety times for liquid fuel fired burners ..............................................................34

4.11.8 Flame failure on start-up ..................................................................................................................35

4.11.9 Flame failure during operation ......................................................................................................35

4.12 Multiple fuels ........................................................................................................................................35

4.12.1 General ....................................................................................................................................................35

4.12.2 Fuel circuit .............................................................................................................................................35

4.12.3 Combustion air supplies ...................................................................................................................36

4.12.4 Operation of the safety devices ......................................................................................................36

4.12.5 Air/fuel ratio .........................................................................................................................................36

4.13 Oxygen or oxygen-enriched combustion air (OOECA) ...........................................................36

4.13.1 General ....................................................................................................................................................36

4.13.2 Suitability for oxygen service .........................................................................................................36

4.13.3 Pipework ................................................................................................................................................36

4.13.4 Flow velocities ......................................................................................................................................37

4.13.5 Connection for oxygen pipework ..................................................................................................37

4.13.6 Sealing materials for oxygen pipework ......................................................................................38

4.13.7 Fittings ....................................................................................................................................................38

4.13.8 Blow off and venting lines ................................................................................................................38

4.13.9 Flexible tubing and couplings .........................................................................................................38

4.13.10 Safety devices against backflow ..............................................................................................38

4.13.11 Material requirements ...............................................................................................................38

5 Verification of the safety requirements and/or measures .........................................................39

6 Information for Use ..................................................................................................................................43

iv © ISO #### – All rights reserved
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oSIST prEN ISO 13577-2:2021
ISO/DIS 13577-2:2021(E)

6.1 General .......................................................................................................................................................... 43

6.2 Marking ........................................................................................................................................................ 43

6.3 Instruction handbook .............................................................................................................................. 43

6.3.1 General ................................................................................................................................................... 43

6.3.2 Description of equipment ................................................................................................................ 44

6.3.3 Inspection procedures ...................................................................................................................... 44

6.3.4 Commissioning, start-up and operating procedures ............................................................. 45

6.3.5 Shut-down procedures ..................................................................................................................... 45

6.3.6 Maintenance procedures ................................................................................................................. 46

6.3.7 Documentation .................................................................................................................................... 46

Annex A (informative) List of significant hazards ............................................................................... 47

Annex B (informative) Examples of fuels ................................................................................................ 49

B.1 Classification of fuels ............................................................................................................................... 49

B.2 Gaseous fuels .............................................................................................................................................. 49

B.3 Liquid fuels .................................................................................................................................................. 49

Annex C (normative) Maximum allowed pressure .............................................................................. 50

Annex D (informative) Terms and definitions relevant to ISO 13577-2 listed in ISO 13574

................................................................................................................................................................... 55

Annex E (informative) Examples for the determination of Safety Integrity Level (SIL) or

Performance Level (PL) using the risk graph method .......................................................... 61

Annex F (normative) Regional product standards .............................................................................. 75

F.1 Product standards mechanical ............................................................................................................ 75

F.1.1 Automatic shut-off valves ................................................................................................................ 75

F.1.2 Pressure regulators ........................................................................................................................... 76

F.1.3 Over-pressure cut-off devices ........................................................................................................ 76

F.1.4 Pneumatic gas/air ratio controls .................................................................................................. 77

F.1.5 Valve proving systems ...................................................................................................................... 77

F.1.6 Manual gas shut-off valves .............................................................................................................. 77

...

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