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BSI PD CEN/TR 17924:2023

BSI PD CEN/TR 17924:2023

$215.11

Safety and control devices for burners and appliances burning gaseous and/or liquid fuels. Guidance on hydrogen specific aspects

Published By Publication Date Number of Pages
BSI 2023 76
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This document gives guidance on hydrogen specific safety, design, construction, and performance requirements and testing of safety, control or regulating devices (hereafter referred to as controls) for burners and appliances burning gases with hydrogen content. The following hydrogen concentrations are covered in this document: – H2NG (hydrogen in natural gas) blends of 20 % hydrogen; or – 100 % hydrogen; or – varying blends / admixtures to natural gas. Furthermore, it identifies the expected revision needs of the existing CEN/TC 58 standards as well as the need of potential further new standardization deliverables.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
9 2 Normative references
10 3 Terms and definitions
11 4 Classification
4.1 Classes of control
4.2 Classification of hydrogen
13 5 Common properties
15 6 General considerations regarding design and construction
6.1 Mechanical parts of the control
6.1.1 Theoretical background
17 6.1.2 Holes
6.1.3 Breather holes
6.1.3.1 Alternative requirements for breather holes
18 6.1.3.2 Turbulent flow model and calculations
19 6.1.3.3 Measurements and calculations
20 6.1.3.4 Conclusions on leakage rate measurements and calculations in case of diaphragm fracture
21 6.1.3.5 Considerations based on a risk assessment
27 6.2 Materials
6.2.1 General
28 6.2.2 Housing
6.2.2.1 General
6.2.2.2 Alternative requirements for housings
6.2.2.3 Measurements
29 6.2.2.4 Conclusions on leakage rate measurements and calculations in case of fracture of non-metallic parts
30 6.2.3 Zinc alloys
6.2.4 Springs
6.2.5 Resistance to corrosion and surface protection
6.3 Electrical parts of the control
6.3.1 Electrical components
7 Performance
31 7.1 Leak-tightness
7.1.1 Flow calculations
7.1.2 Leakage rate measurements
32 7.1.3 Conclusions on leakage rate measurements and calculations
33 7.1.4 Considerations based on a risk assessment
38 7.2 Durability
7.2.1 Elastomers in contact with gas
7.2.2 Lubricants in contact with gas
8 Marking, instructions
8.1 Instructions
39 Annex A (informative)Modifications and/or additions to subclauses of CEN/TC 58/WG 11 standards due to introduction of Cat Hy as combustible gas
40 Annex B (informative)Modifications and/or additions to subclauses of CEN/TC 58/WG 12 standards due to introduction of Cat Hy as combustible gas
43 Annex C (informative)Modifications and/or additions to subclauses of CEN/TC 58/WG 13 standards due to introduction of Cat Hy as combustible gas
44 Annex D (informative)Modifications and/or additions to subclauses of CEN/TC 58/WG 14 standards due to introduction of Cat Hy as combustible gas
45 Annex E (informative)Risk assessment, standardization, certification and operation of gas appliances with up to 20 vol.-% H2 fluctuating admixtures
50 Annex F (informative)Risk assessment, standardization, certification and operation of gas appliances using hydrogen (ISO 14687:2019, Type I, Grade A)
54 Annex G (informative)Proposal for leakage rate requirements and tests for gas pipe work including controls (e.g. valves, regulators, pressure switches) used in gas appliances (e.g. forced draught gas-burners or industrial thermo-processing equipment) and the impact on the installation room size
67 Annex H (informative)Breather hole leakage rate mitigation measures
70 Annex I (informative)Leakage rate mitigation measures

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BSI PD CEN/TR 17924:2023
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