EN 334:2019/FprA1

Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)

This European Standard specifies constructional, functional, testing, marking, sizing and documentation requirements of gas pressure regulators:
-   for inlet pressures up to 100 bar and nominal diameters up to DN 400;
-   for an operating temperature range from - 20  °C to +60 °C,
which operate with fuel gases of the 1st and 2nd  family as defined in EN 437:2003+A1:2009, used in the pressure regulating stations in accordance with EN 12186 or EN 12279, in transmission and distribution networks and also in commercial and industrial installations.
"Gas pressure regulators" hereafter will be called "regulators" except in the titles.
For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, the Annex ZA lists all applicable essential safety requirements of the European legislation on pressure equipment except external and internal corrosion resistance for applications in corrosive environment.
This document considers the following temperature classes/types of regulators:
-   temperature class 1: operating temperature range from −10 °C to 60 °C;
-   temperature class 2: operating temperature range from −20 °C to 60 °C;
-   type IS: (integral strength type);
-   type DS: (differential strength type).
This document applies to regulators which use the pipeline gas as a source of control energy unassisted by any external power source.
The regulator may incorporate a second regulator, used as monitor, complying with the requirements in this document.
The regulator may incorporate a safety shut off device (SSD) complying with the requirements of EN 14382.
The regulator may incorporate a creep (venting) relief device, complying with the requirements in Annex E and/or a vent limiter, complying with the requirements in Annex I.
This document does not apply to:
-   regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters;
-   regulators designed to be incorporated into pressure control systems used in service lines ) with volumetric flow rate ≤ 200 m3/h at normal conditions and inlet pressure ≤ 5 bar;
-   regulators for which a specific document exists (e.g. EN 88-1 and EN 88-2, etc.);
-   industrial process control valves in accordance with EN 1349.
The normative Annex G of this document lists some suitable materials for pressure bearing parts, inner metallic partition walls, auxiliary devices, integral process and sensing lines, connectors and fasteners. Other materials may be used when complying with the restrictions given in Table 5.
Continued integrity of gas pressure regulators is ensured by suitable surveillance checks and maintenance. For periodic functional checks and maintenance it is common to refer to national regulations/standards where existing or users/manufacturers practices.
This document has introduced the reaction of the pressure regulators to the specified reasonable expected failures in terms of "fail close" and "fail open" pressure regulator types, but it should be considered that there are other types of failures whose consequences can bring to the same reactions (these risks are covered via redundancy as per EN 12186) and that residual hazards will be reduced by a suitable surveillance in use / maintenance.
In this document, both pressure regulators that can be classified as "safety accessories" by themselves (monitors) according to European legislation on pressure equipment as well as regulators that can be used to provide the necessary pressure protection through redundancy (e.g. pressure regulator with integrated safety shut-off device, pressure regulator + in-line monitor, pressure regulator + safety shut off device) are considered.
The provisions in this document are in line with the state of art at the moment of writing.

Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa (100 bar)

No scope available

Régulateurs de pression de gaz pour des pressions amont jusqu’à 100 bar

Regulatorji tlaka plina za vstopne tlake do 10 MPa (100 bar) - Dopolnilo A1

General Information

• Status: Not Published
• Publication Date: 15-Aug-2024
• ICS: 23.060.40 - Pressure regulators
• Technical Committee: CEN/TC 235 - Gas pressure regulators and associated safety devices for use in gas transmission and distribution
• Drafting Committee: CEN/TC 235/WG 1 - Safety shut-off devices, safety relief devices and small regulators with or without safety devices used in gas transmission and/or distribution.
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 20-Jun-2024
• Completion Date: 20-Jun-2024
• 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/601 - COMMISSION IMPLEMENTING DECISION of 1.3.2024 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards pressure equipment and assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council
• Ref Project: SIST EN 334:2019/kFprA1:2024 - Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)

Relations

• Merged Into: EN 334:2019+A1:2024 - Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
• Effective Date: 03-Jul-2024
• Amends: EN 334:2019 - Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
• Effective Date: 22-Sep-2021

Overview

EN 334:2019 with amendment A1 (prA1) is the European standard for gas pressure regulators with inlet pressures up to 10 MPa (100 bar) and nominal diameters up to DN 400. It defines constructional, functional, testing, marking, sizing and documentation requirements for regulators used with 1st and 2nd family fuel gases (per EN 437) across pressure regulating stations, transmission and distribution networks, and commercial/industrial installations. The standard covers ambient/operating temperatures from −20 °C to +60 °C and introduces temperature classes/types and failure behaviours (fail-close / fail-open).

Key Topics

• Scope and exclusions
  • Applies to pipeline-energy-controlled regulators (no external power) and to units incorporating monitors, safety shut-off devices (SSD) or creep/venting devices.
  • Excludes domestic appliance regulators downstream of meters, certain low-flow service-line regulators (≤ 200 m3/h at normal conditions and inlet pressure ≤ 5 bar), regulators covered by other standards (e.g., EN 88‑1/‑2), and industrial process control valves (EN 1349).
• Design & safety requirements
  • Pressure-bearing construction, material selection and allowable stresses (safety factors per Table 9).
  • Classification into temperature class 1 (−10 °C to 60 °C), class 2 (−20 °C to 60 °C), IS (integral strength) and DS (differential strength).
  • Redundancy concepts, monitors as safety accessories, and Annex ZA mapping to PED 2014/68/EU essential safety requirements.
• Testing, inspection & welding
  • Fabrication welds require qualified welding procedures and personnel per updated EN ISO welding standards (EN ISO 15607:2019, EN ISO 15609‑1:2019, etc.).
  • Non‑destructive testing (NDT) by personnel qualified to EN ISO 9712:2022; NDT scope and acceptance criteria detailed (Table 6 and annexes).
• Materials & documentation
  • Normative Annex G lists suitable materials for pressure-bearing parts and internal components; alternatives permitted when complying with material restrictions.
  • Marking, operating instructions, proof testing and maintenance surveillance are specified.

Applications

Who uses EN 334:2019/FprA1:

• Manufacturers and designers of gas pressure regulators and integrated regulator assemblies
• Gas network operators and station designers (EN 12186 / EN 12279 pressure regulating stations)
• Notified bodies, testing laboratories and inspection personnel
• Maintenance teams and asset managers responsible for in-service surveillance and periodic functional checks

Typical use cases:

• Regulators in transmission/distribution networks, commercial and industrial gas installations
• Integrated regulator + monitor or regulator + SSD configurations for safety/redundancy
• Specification and procurement of regulators to meet PED compliance

Related Standards

• EN 12186, EN 12279 (pressure regulating stations)
• EN 437 (fuel gas families)
• EN 14382 (safety shut-off devices)
• EN ISO 9712:2022 (NDT personnel qualification)
• EN ISO 15607 / 15609 series (welding procedure qualification)
• PED Directive 2014/68/EU (referenced via Annex ZA)

Keywords: EN 334:2019/FprA1, gas pressure regulators, 10 MPa, 100 bar, pressure regulating stations, EN 12186, EN 12279, EN 437, safety shut-off device, EN 14382, non-destructive testing, PED.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 334:2019/oprA1:2023
01-januar-2023
Regulatorji tlaka plina za vstopne tlake do 10 MPa (100 bar) - Dopolnilo A1
Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa (100 bar)
Régulateurs de pression de gaz pour des pressions amont jusqu’à 100 bar
Ta slovenski standard je istoveten z: EN 334:2019/prA1
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
SIST EN 334:2019/oprA1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 334:2019/oprA1:2023
SIST EN 334:2019/oprA1:2023
DRAFT
EUROPEAN STANDARD
EN 334:2019
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
December 2022
ICS
English Version
Gas pressure regulators for inlet pressure up to 10 MPa
(100 bar)
Régulateurs de pression de gaz pour des pressions Gas-Druckregelgeräte für Eingangsdrücke bis 10 MPa
amont jusqu'à 100 bar (100 bar)
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 235.

This draft amendment A1, if approved, will modify the European Standard EN 334:2019. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 334:2019/prA1:2022 E
worldwide for CEN national Members.

SIST EN 334:2019/oprA1:2023
EN 334:2019/prA1:2022 (E)
Contents Page
European foreword . 3
1 Modification to Clause 2 “Normative references” . 4
2 Modification to 4.2.1.6.1 “Welding requirements” . 4
3 Modification to 4.2.1.7.3 “Qualification of personnel for non-destructive testing” . 4
4 Modification to 4.3.7 “Minimum values of safety factor for pressure bearing parts . 6
5 Modification to Table ZA.1 — Correspondence between this European Standard and
Directive 2014/68/EU (PED) . 7
6 Modification to “Bibliography” . 8

SIST EN 334:2019/oprA1:2023
EN 334:2019/prA1:2022 (E)
European foreword
This document (EN 334:2019/prA1:2022) has been prepared by Technical Committee CEN/TC 235 “Gas
pressure regulators and associated safety devices for use in gas transmission and distribution”, the
secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
SIST EN 334:2019/oprA1:2023
EN 334:2019/prA1:2022 (E)
1 Modification to Clause 2 “Normative references”
Replace the following references:
EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO
9712:2012)
EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials - General
rules (ISO 15607:2003)
EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials -
Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
by the new editions:
EN ISO 9712:2022, Non-destructive testing - Qualification and certification of NDT personnel (ISO
9712:2021)
EN ISO 15607:2019, Specification and qualification of welding procedures for metallic materials - General
rules (ISO 15607:2019)
EN ISO 15609-1:2019, Specification and qualification of welding procedures f
...