SIST EN ISO 25457:2023

Oil and gas industries including lower carbon energy - Flare details for general refinery and petrochemical service (ISO 25457:2023)

ISO 25457:2008 specifies requirements and provides guidance for the selection, design, specification, operation and maintenance of flares and related combustion and mechanical components used in pressure relieving and vapour-depressurizing systems for petroleum, petrochemical and natural gas industries.
Although ISO 25457:2008 is primarily intended for new flares and related equipment, it can also be used in the evaluation of existing flare facilities.
Further guidance and best practices are provided for the selection, specification and mechanical details for flares and on the design, operation and maintenance of flare combustion and related equipment.
ISO 25457:2008 also includes a set of data sheets, together with instructions and guidelines, for use in communicating and recording design information.

Erdöl-, petrochemische und Erdgasindustrie - Fackeln für den allgemeinen Betrieb in Raffinerien und petrochemischen Service (ISO 25457:2023)

Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone - Détails sur les torches d'usage général dans les raffineries et dans les usines pétrochimiques (ISO 25457:2023)

L'ISO 25457:2008 spécifie les exigences et fournit les lignes directrices pour le choix, la conception, les spécifications, le fonctionnement et la maintenance des torches et des composants mécaniques et de combustion associés utilisés dans les systèmes de dépressurisation et de protection contre les surpressions pour les industries du pétrole, de la pétrochimie et du gaz naturel.
Bien que l'ISO 25457:2008 soit avant tout destinée aux nouvelles torches et aux équipements associés, elle peut aussi être utilisée dans l'évaluation d'installations de torches existantes.
Des lignes directrices complémentaires et les meilleures pratiques sont donnée quant au choix, spécifications et détails d'ordre mécanique relatifs aux torches et sur la conception, le fonctionnement et la maintenance des équipements associés et de combustion des torches.
L'ISO 25457:2008 inclut également un ensemble de fiches techniques, conjointement aux instructions et lignes directrices; afin de les tiliser pour communiquer et enregistrer des informations de conception.

Naftna in plinska industrija, vključno z nizkoogljično energijo - Podrobnosti o plinskih baklah v rafinerijah in petrokemični industriji (ISO 25457:2023)

Standard ISO 25457:2008 določa zahteve in podaja smernice za izbiro, zasnovo, specifikacijo, delovanje in vzdrževanje plinskih bakel in povezanih sestavnih delov za sežiganje ter mehanskih sestavnih delov, ki se uporabljajo v sistemih za razbremenitev tlaka in zmanjševanje tlaka hlapov za petrokemično industrijo ter industrijo za predelavo nafte in zemeljskega plina.
Čeprav je standard ISO 25457:2008 namenjen predvsem novim plinskim baklam in povezani opremi, se lahko uporablja tudi pri ocenjevanju v obstoječih obratih za sežig.
Nadaljnji napotki in najboljše prakse so podani za izbiro, specifikacijo in mehanske podrobnosti plinskih bakel ter tudi za zasnovo, delovanje in vzdrževanje plinskih bakel in povezane opreme.
Standard ISO 25457:2008 prav tako vključuje sklop podatkovnih listov skupaj z navodili in napotki za uporabo pri posredovanju in beleženju informacij o zasnovi.

General Information

• Status: Published
• Public Enquiry End Date: 31-Jan-2023
• Publication Date: 05-Nov-2023
• ICS: 75.180.20 - Processing equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Nov-2023
• Due Date: 08-Jan-2024
• Completion Date: 06-Nov-2023
• Ref Project: EN ISO 25457:2023 - Oil and gas industries including lower carbon energy - Flare details for general refinery and petrochemical service (ISO 25457:2023)

Relations

• Revised: SIST EN ISO 25457:2009 - Petroleum, petrochemical and natural gas industries - Flare details for general refinery and petrochemical service (ISO 25457:2008)
• Effective Date: 14-Sep-2022

Overview

SIST EN ISO 25457:2023 provides comprehensive requirements and guidance for the design, selection, specification, operation, and maintenance of flare systems used in the oil and gas industries, including emerging lower carbon energy sectors. This standard addresses flares and related combustion and mechanical components essential for pressure-relieving and vapor-depressurizing systems in petroleum, petrochemical, and natural gas facilities. While primarily focused on onshore installations, the guidelines also encompass offshore applications. This second edition updates and supplements API Standard 537 (3rd edition, 2017) and includes new specifications such as ballistic/pyrotechnical flare ignition systems and volumetric flow rate adjustments.

Keywords: oil and gas flare standards, refinery flare design, petrochemical flare systems, flare ignition systems, lower carbon energy flare technology, pressure relief flares, flare maintenance standards.

Key Topics

• Scope and Applicability: Covers flare details for general refinery and petrochemical services, including flare tip design and operational practices adapted to oil, gas, and lower carbon energy sectors.
• Design and Specification: Outlines mechanical details, selection criteria, and design methodologies to ensure safe and effective flare system performance compatible with pressure-relief and vapor-depressurization requirements.
• Flare Ignition Systems: Introduces supplementary requirements for ballistic/pyrotechnical ignition systems, detailing components like launching mechanisms, guide tubes, nitrogen or air delivery for projectiles, and safety devices for spent projectile containment.
• Volumetric Flow Rate Calculation: Provides updated formulae for volumetric flow pertinent to flare design, ensuring precise dimensioning and performance evaluation.
• Operation and Maintenance: Emphasizes best practices for ongoing flare system upkeep, combustion efficiency, and environmental compliance to maximize safety and minimize emissions.
• Integration with API 537: Acts as a supplement to API Standard 537 (3rd edition, 2017) including Addendum 1, maintaining compatibility while clarifying and extending flare system standards.

Applications

• Petroleum Refineries: Standardizes flare systems critical for emergency pressure relief and vapor management, ensuring safety and operational reliability in refinery processes.
• Petrochemical Plants: Offers detailed flare requirements that support complex chemical processing environments where vapor and pressure control are essential.
• Natural Gas Processing: Facilitates the design of flare systems accommodating gas depressurization and pressure relief with efficient combustion and environmental considerations.
• Lower Carbon and Renewable Energy Facilities: Applies to emerging energy sectors requiring similar flare technologies with adaptations for reduced carbon footprints.
• Onshore and Offshore Installations: While focusing on onshore operations, the standard provides relevant guidance that extends to offshore oil and gas platforms, ensuring comprehensive industry applicability.

Related Standards

• API Standard 537 (3rd edition, 2017) and Addendum 1: The foundational standard for flare details which SIST EN ISO 25457:2023 supplements and updates with additional requirements and practical guidelines.
• ISO /API Joint Standards: ISO 25457:2023 is developed in collaboration with international committees aligning closely with industry best practices and international trade requirements.
• Pressure Relief and Vapor Depressurization Standards: Complements other ISO and API standards focusing on pressure relief valves, blowdown systems, and environmental emission controls common in oil and gas processing.

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SIST EN ISO 25457:2023 is an essential standard for engineers, safety managers, and technical specialists engaged in selecting, designing, operating, and maintaining flare systems across diverse oil, gas, and lower carbon energy industries. Adherence to this standard enhances operational safety, environmental compliance, and system efficiency in pressure relief and vapor control operations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2023
Naftna in plinska industrija, vključno z nizkoogljično energijo - Podrobnosti o
plinskih baklah v rafinerijah in petrokemični industriji (ISO 25457:2023)
Oil and gas industries including lower carbon energy - Flare details for general refinery
and petrochemical service (ISO 25457:2023)
Erdöl-, petrochemische und Erdgasindustrie - Fackeln für den allgemeinen Betrieb in
Raffinerien und petrochemischen Service (ISO 25457:2023)
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone -
Détails sur les torches d'usage général dans les raffineries et dans les usines
pétrochimiques (ISO 25457:2023)
Ta slovenski standard je istoveten z: EN ISO 25457:2023
ICS:
75.180.20 Predelovalna oprema Processing equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 25457
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 75.180.20 Supersedes EN ISO 25457:2008
English Version
Oil and gas industries including lower carbon energy -
Flare details for general refinery and petrochemical
service (ISO 25457:2023)
Industries du pétrole et du gaz, y compris les énergies Erdöl-, petrochemische und Erdgasindustrie - Fackeln
à faible teneur en carbone - Détails sur les torches für den allgemeinen Betrieb in Raffinerien und
d'usage général dans les raffineries et dans les usines petrochemischen Service (ISO 25457:2023)
pétrochimiques (ISO 25457:2023)
This European Standard was approved by CEN on 12 October 2023.

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 COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25457:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 25457:2023) has been prepared by Technical Committee ISO/TC 67 "Oil and
gas industries including lower carbon energy" in collaboration with Technical Committee CEN/TC 12
“Oil and gas industries including lower carbon energy” the secretariat of which is held by NEN.
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 2024, and conflicting national standards shall be
withdrawn at the latest by April 2024.
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 ISO 25457:2008.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 25457:2023 has been approved by CEN as EN ISO 25457:2023 without any modification.

INTERNATIONAL ISO
STANDARD 25457
Second edition
2023-10
Oil and gas industries including lower
carbon energy — Flare details for
general refinery and petrochemical
service
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Détails sur les torches d'usage général dans les
raffineries et dans les usines pétrochimiques
Reference number
ISO 25457:2023(E)
ISO 25457:2023(E)
© ISO 2023
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]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 25457:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
rd
4 Supplements to API 537, 3 edition (2017) . 1
4.1 General requirements . 1
4.2 Limitations for design procedures . 2
4.3 Volumetric flow rate .
...