ДСТУ EN 12261:2025 Газові лічильники. Турбінні газові лічильники (EN 12261:2024, IDT)

ДСТУ EN 12261:2025
(EN 12261:2024, IDT)

Газові лічильники. Турбінні газові лічильники

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

European foreword

Introduction

1 Scope

2 Normative references

3 Terms, definitions and symbols

3.1 Terms and definitions

3.2 Symbols

4 Meter classification

4.1 General

4.2 Flange pressure ratings

4.3 Gas meter sizes, rangeability and connection diameter sizes

4.4 Connections and dimensions

4.5 Temperature ranges

4.6 Climatic environment

5 Metrological performance requirements

5.1 General

5.2 Type testing

6 Design, material requirements and manufacturing

6.1 General

6.2 Robustness

6.3 Manufacturing

6.4 Resistance to environmental conditions

6.5 Removable meter mechanisms

6.6 Indicating devices and accessories

6.7 Pressure and temperature tappings

6.8 Lubrication

7 Meter output

7.1 General

7.2 Indicating device

7.3 Pulse generator

7.4 Output shaft

7.5 Test element

8 Marking

8.1 General

8.2 Data plate

8.3 Direction of flow

8.4 Working position

8.5 Other connections

9 Documentation

9.1 General

9.2 Documentation related to the manufacturer's tests

9.3 Declaration of conformity

9.4 Instruction manual

Annex A (normative) Test facility specifications

A.1 Test medium

A.2 Leakage

A.3 Installation conditions

A.4 Reference standards

Annex B (normative) Perturbation testing

B.1 General

B.2 Terms and definitions

B.3 Requirements

B.4 Tests

B.5 Similarity

B.6 Flow conditioner

Annex C (informative) Recommendations for use

C.1 Pressure loss

C.2 Spin test

C.3 Locations of temperature measuring devices

Annex D (normative) Individual factory testing

D.1 General

D.2 Meter report

Annex E (normative) Metrological requirements and tests for each meter prior to dispatch (Individual meter testing)

E.1 Information required from the purchaser (user)

E.2 Determination of number of tests

E.3 Error of indication

E.4 Linearity

E.5 WME

E.6 Data plate specification

E.7 Test certificate

Annex F (normative) Compliance evaluation for gas meters

F.1 General

F.2 Quality Management System

Annex G (informative) Materials for pressurized parts

Annex ZA (informative) Relationship between this European Standard and the essential requirements of Directive 2014/32/EU Measuring Instruments Directive aimed to be covered

Annex ZB (informative) Relationship between this European Standard and the essential requirements of Directive 2014/68/EU aimed to be covered

Bibliography