magnifying icon Basket
1 item ^

Basket is empty
Login

Login

LOGGED AS

Help

Satisfaction enquiry

SATISFACTION ENQUIRY

Newsletter

Free of charge lifelong learning "Standardization"

FREE OF CHARGE LIFELONG LEARNING "STANDARDIZATION"

Standardisation

Draft standards in public enquiry

DRAFT STANDARDS IN PUBLIC ENQUIRY

Standards organizations

STANDARDS ORGANIZATIONS

  • National standards

  • European standards

  • International standards


Deliverable

 
Free preview
Price
Language
 
EN 334:2019/prA1 Edition 08/2024
Gas pressure regulators for inlet pressure up to 10 MPa (100 bar)
  •   
  •   
  •   
  •  
  •  
  •  
  •  
  •  
  •  
 

Abstract

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.

Status

Draft - Active

Origin

Technical Committee :
CEN/TC 235 : Gas pressure regulators and associated safety devices for use in gas transmission and distribution

Implementation

start of the vote on the project    22/12/2022   date of ratification (dor)    18/07/2024
end of the vote on the project    16/03/2023   date of anouncement (doa)    18/11/2024
start of the vote on the final project    25/04/2024   date of publication (dop)    17/02/2025
end of the vote on the final project    20/06/2024   date of withdrawal (dow)    17/02/2025


Publication Official Journal
of the Grand-Duchy of Luxembourg
Reference

Relations

Relations to older standards
ILNAS-EN 334:2019

International Classification for Standards (ICS codes) :

23.060.40 : Pressure regulators

magnifying icon Basket
1 item ^

Basket is empty


Warning:
DIN standards can be downloaded only once! After downloading, they are no longer available in the eLibrary.
Begin download?