prEN ISO 21789

Gas turbine applications - Safety (ISO/DIS 21789:2020)

To deliver an EN ISO version of "ISO 21789 Gas turbine applications - Safety"
To extend the use of the current ISO standard by including details to assist designers, manufacturers and others by providing methods of compliance with the relevant, essential safety requirements of a range of EU Directives for gas turbine applications without prejudicing compliance with the Standard outside of the European Union.
It is proposed that the existing ISO 21789 is used as the basis of an EN ISO standard by revising as necessary such clauses that the resulting standard can be Harmonised against the applicable EU Directives.
To facilitate this, a draft combined ISO21789 / prEN ISO 21789 is proposed as a New Work Item which is to be commented / reviewed in conjunction with a combined ISO/TC192 WG10 and CEN/TC399 WG committee in accordance with the requirements of the Vienna agreement.
The additional Annexes that would be required for prEN ISO 21789 are appended to the draft.
Subsequently ISO 21789 will be updated to include applicable changes made to the new draft with the exception of the references applicable to Harmonisation.

Gasturbinenanwendungen - Sicherheit (ISO/DIS 21789:2020)

Diese Internationale Norm behandelt die Sicherheitsanforderungen an für aus Flugtriebwerken abgeleitete und industrielle Gasturbinen-Antriebsaggregate, die flüssige oder gasförmige Brennstoffe verwenden und die sicherheitsbezogenen Steuerungs- und Erkennungssysteme für alle Arten von offenen Kreisläufen (einfach, kombiniert, regenerativ, Zwischenerhitzung usw.) in Onshore- und Offshore-Anwendungen einschließlich schwimmender Produktionsplattformen.
Diese Internationale Norm gilt für mechanische, elektrische und Druckgerätebauteile und -systeme, die für die Funktion des Antriebsaggregats benötigt werden. Sie gilt beispielsweise unter anderem für Hilfsgetriebe für Kernbohrgasturbinen, Abtriebsgetriebe, Verbrennungssysteme, Luftfilter, Gasturbinensteuerungssysteme, Ölsysteme und Brennstoffsysteme. Die Norm behandelt außerdem die Vermeidung  von Sicherheitsrisiken in die allgemeine Installation wie etwa Abgasspülung oder  entleerung.
Diese Internationale Norm beschreibt die erwarteten signifikanten Gefährdungen in Verbindung mit aus Flugtriebwerken abgeleiteten und industriellen Gasturbinen-Antriebsaggregaten und legt die geeigneten präventiven Maßnahmen und Prozesse zur Reduzierung oder Vermeidung dieser Gefährdungen fest. Diese Internationale Norm behandelt die Verletzungs- und tödlichen Risiken für Personen und die Risiken für die Umwelt. Sachschäden an den Anlagen ohne Risiko für Personen oder die Umwelt werden nicht behandelt.
Gasturbineneinheiten sind allgemein durch Internationale und nationale Normen festgelegt. Die Erreichung von Sicherheit wird durch die Anwendung zusätzlicher Sicherheitsvorschriften und Normen unterstützt, die gemeinsam für Gasturbinen und andere Technologien angewendet werden. Hierbei ist zu beachten, dass lokale gesetzliche Vorschriften in den Ländern, in denen das Gerät in Betrieb genommen werden soll, möglicherweise nicht durch diese Internationale Norm behandelt werden.
Das allgemeine Ziel dieser Internationalen Norm besteht darin, sicherzustellen, dass Geräte über ihre gesamte Lebensdauer in Übereinstimmung mit ISO 12100 gestaltet, konstruiert, betrieben und instandgehalten werden.
Diese Internationale Norm behandelt die Sicherheit von Gasturbinen aus einer internationalen Perspektive soweit wie möglich basierend auf dem Inhalt der bestehenden anerkannten ISO- und IEC-Normen. Wo keine ISO- oder IEC Norm besteht, wurden andere Vorschriften und Normen (wie etwa EN, NFPA usw.) eingebunden. Wo lokale oder nationale gesetzliche Vorschriften keine eingeführten Vorschriften oder Normen zulassen oder alternative oder nationale Normen mit vergleichbaren Anforderungen an die Risikoreduzierung bestehen, ist die Anwendung dieser alternativen Vorschriften oder Normen anstelle der Verweisungen in Abschnitt 2 zulässig.
Diese Internationale Norm schließt die folgenden Aspekte aus:
- strukturelle Gestaltung von Abgasanlagen;
- angetriebene Geräte;
- in ISO 19372 behandelte Mikroturbinen;
- hauptsächlich für den direkten und indirekten Antrieb verwendete Gasturbinen;
- Gasturbinen für mobile Anwendungen;
- spezielle Wärmequellenanwendungen;
- Gasturbinen in Forschungs- und Entwicklungsprogrammen;
- Druckluft-Energiespeicheranlagen.
Diese Internationale Norm kann gegebenenfalls als allgemeine Anleitung für solche Anwendungen genutzt werden.
Dieses Dokument gilt nicht für Maschinen oder Sicherheitsbauteile, die vor dem Datum der Veröffentlichung dieses Dokuments als Internationale Norm hergestellt wurden.

Applications des turbines à gaz - Sécurité (ISO/DIS 21789:2020)

Uporaba plinske turbine - Varnost (ISO/DIS 21789:2020)

General Information

• Status: Not Published
• ICS: 27.040 - Gas and steam turbines. Steam engines
• Technical Committee: CEN/TC 399 - Project Committee - Gas Turbines applications - Safety
• Drafting Committee: CEN/TC 399 - Project Committee - Gas Turbines applications - Safety
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 05-May-2021
• Completion Date: 05-May-2021
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: oSIST prEN ISO 21789:2020 - Gas turbine applications - Safety (ISO/DIS 21789:2020)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 21789:2020
01-junij-2020
Uporaba plinske turbine - Varnost (ISO/DIS 21789:2020)
Gas turbine applications - Safety (ISO/DIS 21789:2020)
Gasturbinen - Sicherheit (ISO/DIS 21789:2020)
Applications des turbines à gaz - Sécurité (ISO/DIS 21789:2020)
Ta slovenski standard je istoveten z: prEN ISO 21789
ICS:
27.040 Plinske in parne turbine. Gas and steam turbines.
Parni stroji Steam engines
oSIST prEN ISO 21789:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 21789:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 21789:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21789
ISO/TC 192 Secretariat: ANSI
Voting begins on: Voting terminates on:
2020-04-14 2020-07-07
Gas turbine applications — Safety
Applications des turbines à gaz — Sécurité
ICS: 27.040
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 21789:2020(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 2020
---------------------- Page: 3 ----------------------
oSIST prEN ISO 21789:2020
ISO/DIS 21789:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 21789:2020
ISO/DIS 21789:2020(E)
Contents Page

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

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 4

4 List of significant hazards ........................................................................................................................................................................... 6

5 Safety requirements ......................................................................................................................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

5.2 Risk assessment ..................................................................................................................................................................................... 6

5.2.1 Risk assessments requirements ......................................................................................................................... 7

5.3 Modifications and replacement parts ................................................................................................................................. 8

5.4 Foreseeable misuse ............................................................................................................................................................................. 8

5.5 Lifetime .......................................................................................................................................................................................................... 8

5.6 Hazard combinations ........................................................................................................................................................................ 8

5.7 Noise ................................................................................................................................................................................................................ 8

5.8 Mechanical .................................................................................................................................................................................................. 9

5.8.1 Guarding .................................................................................................................................................................................. 9

5.8.2 Accessibility for maintenance ............................................................................................................................... 9

5.8.3 Casing design ...................................................................................................................................................................10

5.8.4 Gas turbine compressor surge ..........................................................................................................................10

5.8.5 Stability and handling .................. ......................................................................................................................... ....10

5.8.6 Overload of couplings, rotating shafts and gears due to torque ..........................................10

5.8.7 Vibration ..............................................................................................................................................................................11

5.8.8 Mechanical failure caused by corrosion ...................................................................................................11

5.8.9 Design methods and materials .........................................................................................................................11

5.8.10 Gas turbine temperatures .....................................................................................................................................11

5.8.11 Environmental loads .................................................................................................................................................11

5.8.12 Assembly features ........................................................................................................................................................12

5.8.13 Couplings .............................................................................................................................................................................12

5.8.14 Rotor bearings ................................................................................................................................................................12

5.8.15 Rotating part failure ...................................................................................................................................................12

5.8.16 Foreign object damage (FOD) screen ..........................................................................................................13

5.8.17 Gearbox .................................................................................................................................................................................13

5.8.18 Starting systems ............................................................................................................................................................13

5.8.19 Low ambient temperature conditions........................................................................................................14

5.9 Gas turbine compressor air inlet system .......................................................................................................................14

5.9.1 General...................................................................................................................................................................................14

5.9.2 Inlet air contamination ............................................................................................................................................14

5.9.3 Icing monitoring and prevention ....................................................................................................................14

5.9.4 Implosion protection .................................................................................................................................................14

5.9.5 Inlet explosion protection .....................................................................................................................................15

5.9.6 Waste disposal through combustion ...........................................................................................................15

5.9.7 Recirculation ....................................................................................................................................................................16

5.9.8 Gas turbine compressor air inlet ducting ................................................................................................16

5.10 Fuel systems ...........................................................................................................................................................................................16

5.10.1 General...................................................................................................................................................................................16

5.10.2 Fuel supply quality and supply conditions .............................................................................................16

5.10.3 Pressure (leakage) testing ....................................................................................................................................17

5.10.4 Fuel supply heating ........................................................................................................................................... ..........17

5.10.5 Gas fuel systems ............................................................................................................................................................17

5.10.6 Liquid fuel systems .....................................................................................................................................................21

5.10.7 Multi-fuel systems .......................................................................................................................................................25

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 21789:2020
ISO/DIS 21789:2020(E)

5.10.8 Fuel purging ......................................................................................................................................................................25

5.10.9 Fuel drainage ....................................................................................................................................................................26

5.11 Combustion supervision ..............................................................................................................................................................26

5.11.1 General...................................................................................................................................................................................26

5.11.2 Requirements for ignition .....................................................................................................................................26

5.11.3 Extinction safety time ...............................................................................................................................................27

5.12 Exhaust system ....................................................................................................................................................................................27

5.12.1 Damper controls............................................................................................................................................................27

5.12.2 Flexible joint location ...............................................................................................................................................27

5.12.3 Exhaust outlet .................................................................................................................................................................27

5.12.4 Explosion protection .................................................................................................................................................27

5.13 Enclosures ................................................................................................................................................................................................28

5.13.1 General...................................................................................................................................................................................28

5.13.2 Enclosure structure ....................................................................................................................................................29

5.13.3 Enclosure fire precautions ...................................................................................................................................29

5.13.4 Explosion prevention and protection — Area classification — Ventilation ..............29

5.13.5 Gas detection ....................................................................................................................................................................29

5.13.6 Enclosure purging ........................................................................................................................................................30

5.13.7 Flammable Mist .............................................................................................................................................................30

5.13.8 Access and doors ..........................................................................................................................................................30

5.13.9 Entrapment ........................................................................................................................................................................31

5.14 Lighting .......................................................................................................................................................................................................31

5.15 Fire precautions ..................................................................................................................................................................................31

5.15.1 General...................................................................................................................................................................................31

5.15.2 Structural fire risk reduction .............................................................................................................................31

5.15.3 Flammable Fluids Mitigation and Containment ................................................................................31

5.15.4 Fire protection ................................................................................................................................................................32

5.15.5 Fire detection ...................................................................................................................................................................32

5.15.6 Fire extinguishing systems ...................................................................................................................................33

5.15.7 Water mist extinguishant ......................................................................................................................................34

5.15.8 Extinguishing system controls ..........................................................................................................................34

5.15.9 Escape ....................................................................................................................................................................................36

5.15.10 Uncontrolled release of media and loss of propellant pressure ..........................................36

5.15.11 Vessel thermal relief (burst disc) ...................................................................................................................36

5.15.12 Propellant vessels ........................................................................................................................................................36

5.15.13 Release of extinguishant into gas turbine halls, control rooms, etc. ................................36

5.16 Hazardous area classification and explosion prevention and protection .........................................37

5.16.1 General...................................................................................................................................................................................37

5.16.2 Area classification ........................................................................................................................................................37

5.16.3 Explosion prevention ................................................................................................................................................37

5.16.4 Ignition source control ............................................................................................................................................38

5.16.5 Reduction of explosion effects in an enclosed space .....................................................................39

5.17 Ventilation ................................................................................................................................................................................................40

5.17.1 General...................................................................................................................................................................................40

5.17.2 Cooling ...................................................................................................................................................................................40

5.17.3 Heating ..................................................................................................................................................................................41

5.17.4 Hazardous area control ...........................................................................................................................................41

5.17.5 Hot surfaces.......................................................................................................................................................................41

5.17.6 Ventilation inlet location ........................................................................................................................................41

5.17.7 Ventilation inlet filtration ......................................................................................................................................42

5.17.8 Ventilation inlet ducting .........................................................................................................................................42

5.17.9 Ventilation outlet location ....................................................................................................................................42

5.17.10 Ventilation monitoring ............................................................................................................................................42

5.18 Fans ................................................................................................................................................................................................................42

5.18.1 Fan guards and structural failure ...................................................................................................................42

5.18.2 Air blast oil coolers .....................................................................................................................................................43

5.18.3 Sparking of fan blades ..............................................................................................................................................43

5.19 Flammable gas detection ............................................................................................................................................................43

iv © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 21789:2020
ISO/DIS 21789:2020(E)

5.19.1 Type / selection principles ..................................................................................................................................43

5.19.2 Location principles .....................................................................................................................................................43

5.19.3 Settings ..................................................................................................................................................................................43

5.19.4 Enclosures containing hot surfaces — Screening tool .................................................................43

5.19.5 Maintenance and calibration ..............................................................................................................................44

5.20 Control and automatic protection systems .................................................................................................................44

5.20.1 General...................................................................................................................................................................................44

5.20.2 Environmental suitability .....................................................................................................................................44

5.20.3 Ergonomics ........................................................................................................................................................................45

5.20.4 Failure ....................................................................................................................................................................................45

5.20.5 Calibration ..........................................................................................................................................................................45

5.20.6 Testing ....................................................................................................................................................................................45

5.20.7 Speed control ...................................................................................................................................................................45

5.20.8 Gas turbine emergency shutdown system ..............................................................................................46

5.20.9 Interlocks ...................................................................... .......................................................................................................47

5.20.10 Cyber security .................................................................................................................................................................47

5.21 Electrical ....................................................................................................................................................................................................47

5.21.1 Design/Installation .....................................................................................................................................................47

5.21.2 Isolation and stored energy .................................................................................................................................47

5.21.3 Electrostatic energy and bonding ..................................................................................................................48

5.21.4 Water ingress ...................................................................................................................................................................48

5.21.5 Lightning ..............................................................................................................................................................................48

5.21.6 Electromagnetic compatibility (EMC) ........................................................................................................48

5.21.7 Battery installations ........................................................................................................................................... ........49

5.21.8 Electrical overload .......................................................................................................................................................49

5.21.9 Electrical power failure ...........................................................................................................................................49

5.22 Drains, vents and bleeds ..............................................................................................................................................................49

5.22.1 General...................................................................................................................................................................................49

5.22.2 Vents for flammable gases ....................................................................................................................................50

5.22.3 Toxic and hazardous emissions .................. ......................................................................................................50

5.22.4 Gas turbine compressor bleeds ........................................................................................................................50

5.23 Pressure equipment ........................................................................................................................................................................51

5.23.1 General...................................................................................................................................................................................51

5.23.2 Design .....................................................................................................................................................................................51

5.23.3 Hazards .................................................................................................................................................................................51

5.23.4 Misuse ....................................................................................................................................................................................51

5.23.5 Handling and operation ..........................................................................................................................................51

5.23.6 Isolation, draining and venting .........................................................................................................................51

5.23.7 Fluid injection..................................................................................................................................................................52

5.23.8 Assemblies ...............................................................................................................................

...