EN 334:2005/prA1

Gas pressure regulators for inlet pressures up to 100 bar

Tolerance of 9 months requested before UAP per CEN/TC 235 C02/2006.

Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar

Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont jusqu'à 100 bar

Regulatorji tlaka plina za vstopne tlake do 100 bar - Dopolnilo A1

General Information

• Status: Not Published
• 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: 07-Nov-2008
• Completion Date: 07-Nov-2008
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: SIST EN 334:2005/kprA1:2008 - Gas pressure regulators for inlet pressures up to 100 bar

Relations

• Merged Into: EN 334:2005+A1:2009 - Gas pressure regulators for inlet pressures up to 100 bar
• Effective Date: 18-Jan-2023
• Amends: EN 334:2005 - Gas pressure regulators for inlet pressures up to 100 bar
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2008
Regulatorji tlaka plina za vstopne tlake do 100 bar - Dopolnilo A1
Gas pressure regulators for inlet pressures up to 100 bar
Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
Appareils de régulation de pression de gaz (régulateurs) pour des pressions amont
jusqu'à 100 bar
Ta slovenski standard je istoveten z: EN 334:2005/prA1
ICS:
23.060.40 7ODþQLUHJXODWRUML Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 334:2005
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
August 2008
ICS 23.060.40
English Version
Gas pressure regulators for inlet pressures up to 100 bar
Appareils de régulation de pression de gaz (régulateurs) Gas-Druckregelgeräte für Eingangsdrücke bis 100 bar
pour des pressions amont jusqu'à 100 bar
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 235.
This draft amendment A1, if approved, will modify the European Standard EN 334:2005. 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 Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 334:2005/prA1:2008: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Modification to Foreword .4
2 Modification to Clause 1, Scope .4
3 Modification to Clause 2, Normative reference.5
4 Modification to Clause 3, Terms, definition and symbols.7
5 Modification to 4.1, Basic requirements .11
6 Modification to 4.2, Materials .14
7 Modification to 4.3, Strength of housings .16
8 Modification to Clause 5, Functional requirements.19
9 Modification to 7.7, Test and verification methods .19
10 Modification to 8.1.1, Documentation required prior to type test .22
11 Modification to 8.2.2, Documentation provided with the regulator.22
12 Modification to 9.1, General requirements .22
13 Modification to Annex A, Alternative methods for the determination of the accuracy class,
the lock-up pressure class, the maximum accuracy flow rate, the flow coefficients and the
verification of the hysteresis band.22
14 Modification to Annex B, Inspection certificate.23
15 Modification to D.3, Procedure .25
16 Modification to Annex E, Seat leakage .25
17 Modification to G.3, Optional specifications .25
18 Modification of Annex H, Materials .26
19 Addition of Annex I, Glossery.28
20 Modification to Table ZA.1 - Correspondence between this European Standard and
Directive 97/23/EC (PED) .31
21 Modification to Bibliography.31

Foreword
This document (EN 334:2005/prA1:2008) 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 Unique Acceptance Procedure.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This document specifies the additions and changes to EN 334:2005 concerning mainly the extension of
harmonized part to differential strength regulators and to various combinations including a pressure regulator
and a safety device and the extension of the non-applicability to the regulators incorporated into pressure-
regulating device use in service lines. Further the Clause 3 dealing with terms, symbols and definitions have
been partially re-organized.
1 Modification to Foreword
th
Replace the text after the last comma of the 7 paragraph with the following:
"except the external corrosion resistance in case of environmental conditions where corrosion is likely to
occur" to read:
"For standard gas pressure regulators used in pressure regulating stations complying with EN 12186 or
EN 12279, Table ZA.1 given in Annex ZA includes all applicable Essential Requirements given in Annex I of
PED, except the external corrosion resistance in case of environmental conditions where corrosion is likely to
occur.".
Delete the third-last paragraph.
Replace "The continuing" in the second-last paragraph with "Continued" to read:
"Continued integrity of gas pressure regulators is assured by periodic functional checks. For periodic functional
checks it is common to refer to national regulations/standards where existing or users/manufacturers
practices.".
2 Modification to Clause 1, Scope
st st
Replace the 1 sentence of the 1 paragraph with the following:
"This document specifies constructional, functional, testing and marking requirements, sizing and
documentation of gas pressure regulators used in the pressure regulating stations in accordance with
EN 12186 or EN 12279:".
rd
Replace the 3 paragraph with the following:
"For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279,
Annex ZA lists all applicable Essential Requirements except the external corrosion resistance in case of
environmental conditions where corrosion is likely to occur.".
st th
Replace the 1 line of the 4 paragraph with the following:
"This document considers the following classes/types of regulators:".
nd
and add after its 2 indent the following two new indents: "
 type IS: (integral strength type);
 type DS: (differential strength type).".
nd
Replace the 2 indent of the last paragraph with the following new indent including its footnote to text: "
 regulators incorporated into pressure-regulating devices used in service lines with volumetric flow rate
≤ 200 m /h at normal conditions and inlet pressure ≤ 5 bar;".

The services lines are those defined in EN 12279.
3 Modification to Clause 2, Normative reference
Delete the following standards:
"EN 287 (all parts). QuEN 288 (all parts), Specification and approval of welding procedures for metallic
materials.",
"EN 571-1, Non destructive testing – Penetrant testing – Part 1: General principles.",
"EN 1289, Non-destructive examination of welds – Penetrant testing of welds – Acceptance levels.
EN 1290, Non-destructive examination of welds – Magnetic particle examination of welds.
EN 1291, Non-destructive examination of welds – Magnetic particle testing of welds – Acceptance levels.",
"EN 1435, Non-destructive examination of welds – Radiographic examination of welded joints.
EN 1712, Non-destructive examination of welds – Ultrasonic examination of welded joints – Acceptance levels.
EN 1713, Non-destructive examination of welds – Ultrasonic examination – Characterization of indications in
welds.
EN 1714, Non- destructive examination of welds – Ultrasonic examination of welded joints.",
"EN 12517, Non-destructive examination of welds – Radiographic examination of welded joints – Acceptance
levels."
"ISO 7-1, Pipe threads where pressure tight joints are made on threads – Part 1: Dimensions, tolerances and
designation" and
"ANSI/ASME B1.20.1:1983, Pipe threads, general purpose (inch)
ASME B16.34:1996, Valves – Flanged, threaded and welding end.".
Add the following standards:
"EN 287-1, Qu
"EN 1092-1:2007, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 1: Steel flanges
EN 1092-2:1999, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 2: Cast iron flanges
EN 1092-3:2005, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 3: Copper alloy flanges
EN 1092-4:2004, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 4: Aluminium alloy flanges",
"EN 1759-1, Flanges and their joint – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 1: Steel flanges, NPS ½ to 24
EN 1759-3, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 3: Copper alloy flanges
EN 1759-4, Flanges and their joint – Circular flanges for pipes, valves, fittings and accessories, class
designated – Part 4: Aluminium alloy flanges",
"EN 10226-1, Pipe threads where pressure tight joints are made on the threads – Part 1: Taper external
threads and parallel internal threads – Dimensions, tolerances and designation
EN 10226-2, Pipe threads where pressure tight joints are made on the threads – Part 2: Taper external
threads and taper internal threads – Dimensions, tolerances and designation",
"EN 12516-1:2005, Industrial valves – Shell design strength – Part 1: Tabulation method for steel valves shells
EN 12516-2:2004, Industrial valves – Shell design strength – Part 2: Calculation method for steel valve shells
EN 12516-4:2008, Industrial valves – Shell design strength – Part 4: Calculation method for valve shells in
metallic materials other than steel",
"EN 60534-8-3, Industrial-process control valves – Part 8-3: Noise considerations – Control valve aerodynamic
noise prediction method (IEC 60534-8-3:2000)" and
"EN ISO 9606-2, Qualification test of welders – Fusion welding – Part 2: Aluminium and aluminium alloys
(ISO 9606-2:2004)
EN ISO 9606-3, Qualification test of welders – Fusion welding – Part 3: Copper and copper alloys
(ISO 9606-3:1999)
EN ISO 9606-4, Qualification test of welders – Fusion welding – Part 4: Nickel and nickel alloys
(ISO 9606-4:1999)
EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials – General
rules (ISO 15607:2003)
EN ISO 15609-1:2005, Specification and qualification of welding procedures for metallic materials – Welding
procedure specification – Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15610:2003, Specification and qualification of welding procedures for metallic materials – Qualification
based on tested welding consumables (ISO 15610:2003)
EN ISO 15611:2003, Specification and qualification of welding procedures for metallic materials – Qualification
based on previous welding experience (ISO 15611:2003)
EN ISO 15612:2004, Specification and qualification of welding procedures for metallic materials – Qualification
by adoption of a standard welding procedure (ISO 15612:2004)
EN ISO 15613:2004, Specification and qualification of welding procedures for metallic materials – Qualification
based on pre-production welding test (ISO 15613:2004)
EN ISO 15614-1:2004, Specification and qualification of welding procedures for metallic materials – Welding
procedure test – Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
(ISO 15614-1:2004)
EN ISO 15614-2:2005, Specification and qualification of welding procedures for metallic materials – Welding
procedure test – Part 2: Arc we
...