Under what conditions should copper pipes not be used?

Copper pipes should not be used when gas contains hydrogen sulfide because this compound can cause corrosion and deterioration of the copper material over time. Hydrogen sulfide is a highly corrosive gas that can react with the copper, leading to pitting and eventual failure of the piping system. This makes it essential to choose materials that can withstand such harsh conditions when dealing with gases that may contain hydrogen sulfide.

In contrast, copper may still be suitable for applications with high moisture content, as long as the pipe is properly treated or coated to resist corrosion. While excessive pressure can impact the integrity of any pipe material, it is not a specific limitation related solely to copper. Electrical appliances generally do not affect the suitability of copper pipes unless specific regulations or conditions apply, but this is not a primary concern in the context of gas transport.