ДСТУ EN 14624:2022 Ефективність портативних детекторів витоку та стаціонарних детекторів газу для всіх холодоагентів (EN 14624:2020, IDT)



ДСТУ EN 14624:2022
(EN 14624:2020, IDT)

Ефективність портативних детекторів витоку та стаціонарних детекторів газу для всіх холодоагентів

 
   
 
 
     
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 and definitions

4 Symbols and abbreviations

5 General requirements for all portable locating leak detectors and fixed gas detectors — Refrigerant gas type (informative)

6 Specific requirements for portable locating leak detectors

6.1 Detection limits

6.1.1 General

6.1.2 Static detection limit - the leak detector probe is stationary

6.1.3 Dynamic detection limit - the leak detector probe is moving

6.1.4 Dynamic detection limit in a contaminated environment

6.2 Response time

6.3 Recovery time

6.4 Calibration frequency and procedure

7 Test apparatus for portable leak detectors

7.1 General

7.2 Calibration leaks

7.3 Measuring distance

7.4 Apparatus no. 1: detector probe stationary at the orifice of calibration leak

7.5 Apparatus no. 2: detector probe moved with defined speed and distance in front of a calibration leak

7.6 Apparatus no. 3a: Chamber with monitored concentration

8 Performance tests of portable leak detectors

8.1 General

8.2 Test no. 1: Static detection limits

8.3 Test no. 2: Dynamic detection limits

8.4 Test no. 3 Dynamic detection limit in a contaminated environment

8.5 Test no. 4: Response time

8.6 Test no. 5: Recovery time

9 Portable leak detector characteristics, reporting of test results and requirements

9.1 Reporting of test result

9.2 Minimum product requirements

10 Service and maintenance — Portable locating leak detectors — Periodic check and calibration

11 Technical specification and product information — Portable locating leak detectors

12 Specific requirements for fixed gas detectors

12.1 General

12.2 Suitability

12.3 Function of gas detector

12.4 Ambient conditions, temperature and humidity

12.5 Typical measuring ranges and thresholds

12.6 Accuracy and performance

12.7 Response time

13 Test apparatus for fixed gas detectors

13.1 General

13.2 Apparatus no. 3b: Chamber with monitored concentration

13.3 Apparatus no. 4: Calibration gas with specific concentration

13.4 Apparatus no. 5: Calibration gas for aspirated systems

14 Performance tests of gas detector

14.1 General

14.2 Test conditions — Temperature and humidity

14.3 Test methods

14.3.1 General

14.3.2 Test of accuracy and thresholds

14.3.3 Test of response time

15 Fixed gas detector characteristics, reporting of test results — Reporting of test results

16 Service and maintenance — Fixed gas detectors

16.1 Expected sensor lifecycle

16.2 Periodic check and calibration

17 Technical specification and product information - Fixed gas detectors

Annex A (informative) Conversion factors of leakage rate units

Annex B (informative) Correlation between test gas concentration and leakage rate

B.1 EXAMPLE 1a: Conversion of a concentration increase in a hood to a total leakage volume flow rate (pV-throughput)

B.2 EXAMPLE 1b: Concentration increase due to a small leak in a voluminous room

B.3 EXAMPLE 2: Conversion of a leakage rate (pV-throughput) into a mass flow rate

B.4 EXAMPLE 3: Calculation of the concentrations of tracer gas to be detected in front of a leak with specified leakage rate

Annex C (informative) Guidelines for application of Fixed Gas Detectors

Annex D (informative) Calculation of gas concentration from kg/m3 to ppm

Annex E (informative) Selectivity, cross interference and potential contaminants

Bibliography