EN ISO 13732-1 (touch temperature), ISO 7243 (WBGT heat stress), plus national workplace codes. Insulation is the engineering control of first resort for both.
From our guide: Social Impact of Industrial Decarbonization — full context, charts and sources there.
Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets: