This standard BS EN 16726:2015+A1:2018 Gas infrastructure. Quality of gas. Group H is classified in these ICS categories:
75.060 Natural gas
This European standard specifies gas quality characteristics, parameters and their limits, for gases classified as group H that are to be transmitted, injected into and from storages, distributed and utilized. NOTE For information on gas families and gas groups see EN 437. This European standard does not cover gases conveyed on isolated networks. For biomethane, additional requirements indicated in prEN 16723 1 apply.