Safety and control devices for burners and appliances burning gaseous and/or liquid fuels. Guidance on hydrogen specific aspects
Safety and control devices for burners and appliances burning gaseous and/or liquid fuels. Guidance on hydrogen specific aspects
1 Scope This document is written in preparation of future revision of standards dealing with the general safety, design, construction, and performance requirements and testing of safety, control or regulating devices (hereafter referred to as controls) for burners and appliances burning:
• H 2 NG ( hydrogen in natural gas) fluctuating admixture of no more than 20 vol.-% hydrogen content; or
• hydrogen according to ISO 14687:2019, at least Type I, Grade A; or
• fluctuating admixtures to natural gas from 0 vol.-% to above 20 vol.-% hydrogen (e.g. 0 vol.-% to 10 vol.-% or 0 vol.-% to 40 vol.-%).
This document refers to controls with declared maximum inlet pressure up to and including 500 kPa and of nominal connection sizes up to and including DN 250. The purpose of this document is to provide guidance on hydrogen specific topics, which need to be considered in the future standardization of controls covered by CEN/TC 58 documents including:
• automatic shut-off valves;
• automatic burner control systems;
...
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