National foreword

This British Standard is the UK implementation of EN 12952‑8:2022. It supersedes BS EN 12952‑8:2002, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee PVE/2, Water Tube And Shell Boilers.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

This publication has been prepared under a mandate given to the European Standards Organizations by the European Commission and the European Free Trade Association. It is intended to support requirements of the EU legislation detailed in the European Foreword. A European Annex, usually Annex ZA or ZZ, describes how this publication relates to that EU legislation.

For the Great Britain market (England, Scotland and Wales), if UK Government has designated this publication for conformity with UKCA marking (or similar) legislation, it may contain an additional National Annex. Where such a National Annex exists, it shows the correlation between this publication and the relevant UK legislation. If there is no National Annex of this kind, the relevant Annex ZA or ZZ in the body of the European text will indicate the relationship to UK regulation applicable in Great Britain. References to EU legislation may need to be read in accordance with the UK designation and the applicable UK law. Further information on designated standards can be found at

www.bsigroup.com/standardsandregulation.

For the Northern Ireland market, UK law will continue to implement relevant EU law subject to periodic confirmation. Therefore Annex ZA/ZZ in the European text, and references to EU legislation, are still valid for this market.

UK Government is responsible for legislation. For information on legislation and policies relating to that legislation, consult the relevant pages of www.gov.uk.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2022.

This European Standard was approved by CEN on 15 August 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document ( EN 12952‑8:2022 ) has been prepared by Technical Committee CEN/TC 269 “Shell and water-tube boilers”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2023, and conflicting national standards shall be withdrawn at the latest by April 2023.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12952‑8:2002 .

The technical modifications in comparison with the previous edition are listed in Annex D.

The EN 12952 series “Water-tube boilers and auxiliary installations” consists of the following Parts:

Part 1: General;
Part 2: Materials for pressure parts of boilers and accessories;
Part 3: Design and calculation for pressure parts;
Part 4: In-service boiler life expectancy calculations;
Part 5: Workmanship and construction of pressure parts of the boiler;
Part 6: Inspection during construction, documentation and marking of pressure parts of the boiler;
Part 7: Requirements for equipment for the boiler;
Part 8: Requirements for firing systems for liquid and gaseous fuels for the boiler;
Part 9: Requirements for firing systems for pulverized solid fuels for the boiler;
Part 10: Requirements for safeguards against excessive pressure;
Part 11: Requirements for limiting devices of the boiler and accessories;
Part 12: Requirements for boiler feedwater and boiler water quality;
Part 13: Requirements for flue gas cleaning systems;
Part 14: Requirements for flue gas DENOX systems using liquefied pressurized ammonia and ammonia water solution;
Part 15: Acceptance tests;
Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler;
CR 12952 Part 17: Guideline for the involvement of an inspection body independent of the manufacturer.
Part 18: Operating instructions

Although these parts can be obtained separately, it should be recognized that the parts are inter-dependent. As such, the design and manufacture of water-tube boilers requires the application of more than one part in order for the requirements of the document to be satisfactorily fulfilled.

This document has been prepared under a Standardization Request given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part of this document.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

1 Scope

1.1 Firing systems

This document specifies requirements for liquid and gaseous fuel firing systems of steam boilers and hot water generators as defined in EN 12952‑1:2015 .

These requirements also apply to firing systems of chemical recovery boilers (black liquor boilers) with the additions and amendments specified in Annex A.

These requirements also apply to gas turbines in combination with fired/unfired heat recovery steam generators with the additions and amendments specified in Annex B.

NOTE 1 This document is not applicable to coil type boilers (flash boilers/small boilers) that use burners in accordance with EN 12953‑7 for single burner installations.

NOTE 2 This document is not applicable to the storage of liquid fuels and to transfer stations of long-distance gas pipelines.

1.2 Fuels

This document specifies requirements which cover the use of liquid and gaseous fuels as defined in this document. Fuels deviating from standardized commercially available types can require additional or alternative safety measures. For black liquor these safety measures are given in Annex A.

2 Normative references

3 Terms and definitions

4 Fuel supply

4.1 General

4.2 Fuel transfer and preparation

4.3 Fuel lines

4.4 Safety shut-off devices (Safety trip valves)

5 General

5.1 Air supply

5.2 Air/fuel ratio

5.3 Flue gas discharge

6 Firing system

6.1 Burners

6.2 Flue gas recirculation

6.3 Control and monitoring

6.4 Electrical equipment

6.5 Safety precautions

6.6 Common stack for several firing systems

7 Operating manual

8 Particular requirements for firing systems burning gaseous fuels with high relative density

8.1 Main firing systems

8.2 Ignition burner systems

Bibliography

BS EN 12952-8:2022

Water-tube boilers and auxiliary installations - Requirements for firing systems for liquid and gaseous fuels for the boiler

Current

Published:

30 Nov 2022