What is the application as many times such as natural gas it is permissible as gas lines exposed to the elements have to be protected painted / insulated or galvanized piping
vanized piping
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
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.
galvanize wrought iron pipe
Galvanized Iron pipe
galvanized iron pipes commonly used on water pipe lines, it is dipped into zinc for corrosion protection
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.
It's a type of pipe
ya the galvanized pipecan be use in undergrounds,,, because it is an iron pipe
Black of course
resists rusting longer
Any piping containing Iron, usually Cast Iron, Steel & Galvanized pipe.