resists rusting longer
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
galvanize wrought iron pipe
Galvanized Iron pipe
galvanized iron pipes commonly used on water pipe lines, it is dipped into zinc for corrosion protection
It's a type of pipe
ya the galvanized pipecan be use in undergrounds,,, because it is an iron pipe
The base metal is iron - the active metal is zinc (galvanized)
Black iron pipe is used for gas installations but ONLY if the piping is indoors. Outdoor gas piping is usually done in galvanized pipe. Steam is also piped with black pipe, fire sprinkler and standpipe systems also use black pipe.
Yes, it's better pipe.
Because you will then get a 'galvanic reaction'.
Galvanized pipe for water and drain lines. Cast iron pipe for main drain lines.
without touching it? no what you will have to do is sand or scrape the pipe then you will be able to tell the difference. if its a dull metal then its black iron but if it shines then it would be galvanized.