What are the best practices for metallic vent stacks?

There are dozens of safety considerations for safe design of hydrogen vent stacks. Their primary function
is to vent the hydrogen safely, so vent stacks should be designed such that the gas dispersion and
radiation profile (if ignited) do not impact surrounding equipment, buildings, or people. Documents such
as CGA G5.5, Hydrogen Vent Systems, provide numerous details regarding design. Vent stacks should be
designed to handle expected thrust loads, weather conditions, and hydrogen ignition scenarios. Various
building and electrical codes describe basic grounding requirements.