DIN EN 334:2009
Gas pressure regulators for inlet pressures up to 100 bar (includes Amendment A1:2009); English version of DIN EN 334:2009-07

Standard No.

DIN EN 334:2009

Release Date

2009

Published By

German Institute for Standardization

Status

Be replaced

Replace By

DIN EN 334 E:2016

Latest

DIN EN 334/A1:2023-10

Replace

DIN EN 334:2005 DIN EN 334/A1:2008

Scope

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: I for inlet pressures up to 100 bar and nominal diameters up to DN 400; -- for an operating temperature range from -20 ℃ to +60 ℃, which operate with fuel gases of the 1st and 2nd family in accordance with EN 437 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, Annex ZA lists all applicable Essential Requirements except the external corrosion resistance in case of environmental conditions where corrosion is likely to occur. This document considers the following classes/types of regulators: -- class 1: operating temperature range from -10 ℃ to 60 ℃; -- class 2: operating temperature range from -20 ℃ to 60 ℃; -- 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 creep (venting) relief device, complying with the requirements in Annex F. The regulators complying with the requirements of this document may be declared as "in compliance with EN 334" and bear the marking "EN 334". This document does not apply to: regulators upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters; -- regulators incorporated into pressure-regulating devices used in service linesI 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, etc.); industrial process control valves in accordance with EN 1349.

DIN EN 334:2009 Referenced Document

• EN 10045-1 Metal Products, Mechanical Tests, Charpy Impact Tests, Test Specimens, Testing Conditions
• EN 10204:2004 Metallic products - Types of inspection documents*， 2024-04-19 Update
• 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 1092-1:2007 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges (Incorporates Amendment A1: 2013; Incorporating Corrigendum May 2014)
• EN 1092-2:1997 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 2: Cast iron flanges
• EN 1092-3:2003 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories PN designated - Part 3: Copper alloy flanges
• EN 1092-4:2002 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges
• EN 12186 Gas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements*， 2014-10-01 Update
• EN 12279 Gas supply systems - Gas pressure regulating installations on service lines - Functional requirements
• EN 12516-1:2005 Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells
• EN 12516-2:2004 Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells
• EN 1349 Industrial process control valves*， 2024-04-19 Update
• EN 1418:1997 Welding Personnel - Approval Testing of Welding Operators for Fusion Welding and Resistance Weld Setters for Fully Mechanized and Automatic Welding of Metallic Materials
• EN 1759-1 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Part 1: Steel flanges, NPS 1/2 to 24*， 2024-04-19 Update
• EN 1759-3 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated - Part 3: Copper alloy flanges Incorporating Corrigendum July 2004
• EN 1759-4 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Part 4: Aluminium alloy flanges
• EN 287-1 Qualification test of welders - Fusion welding - Part 1: Steels Incorporating Corrigendum August 2004; Includes Amendment A2:2006
• EN 473:2000 Non-Destructive Testing - Qualification and Certification of NDT Personnel - General Principles includes amendment A1:2005; Supersedes CR 12459:1996*， 2024-04-19 Update
• EN 970:1997 Non-Destructive Examination of Fusion Welds - Visual Examination

DIN EN 334:2009 history

• 2023 DIN EN 334/A1:2023-10 Gas pressure regulators for inlet pressure up to 10 MPa (100 bar); German and English version EN 334:2019/prA1:2022 / Note: Date of issue 2023-08-25*Intended as an amendment to DIN EN 334 (2019-11).
• 2019 DIN EN 334:2019-11 Gas pressure regulators for inlet pressures up to 10 MPa (100 bar); German and English version EN 334:2019 / Note: This standard is part of the DVGW body of rules.
• 2019 DIN EN 334:2019 Gas pressure regulators for inlet pressures up to 10 MPa (100 bar); German and English version EN 334:2019
• 1970 DIN EN 334 E:2016-05 Gas pressure regulators for inlet pressures up to 100 bar
• 2016 DIN EN 334 E:2016 Draft Document - Gas pressure regulators for inlet pressure up to 100 bar; German and English version prEN 334:2016
• 2009 DIN EN 334:2009 Gas pressure regulators for inlet pressures up to 100 bar (includes Amendment A1:2009); English version of DIN EN 334:2009-07
• 2005 DIN EN 334:2005 Gas pressure regulators for inlet pressures up to 100 bar; German version EN 334:2005
• 1970 DIN EN 334:2001 Gas pressure regulators for inlet pressures up to 100 bar

DIN EN 334:2009 Gas pressure regulators for inlet pressures up to 100 bar (includes Amendment A1:2009); English version of DIN EN 334:2009-07 was changed to AASHTO M 169-2015 Standard Specification for Steel Bars, Carbon and Alloy, Cold-Finished.