Hi Juan. You said: < Intuitively, I consider that it should be banned that somebody could touch a metallic tube at -100 ºC for safety reasons, but I have no standard requirement. >
If you are building electrical equipment, then as long as you comply with the requirements of IEC 1010 or EN61010 then you can place a CE mark legally. If the standard doesn't quote a minimum temperature, then it need not be taken into account for compliance purposes. However, in operation, if someone is harmed by the equipment then they can sue you, ot you may be causing an offence under your local safety laws. But the CE mark exists primarily to ease free trade, not to prove safety or quality. Just an opinion. Chris Dupres Surrey, UK.

