No, do not use glue. Use Teflon tape or pipe dope on the threads. You should also make sure you always put the male PVC thread into the female metal thread. If you do it the other way you will tend to split the PVC fitting when you tighten the threads.
NO. - PVC and galvanised pipe can ONLY be joined by mechanical connectors.
By the color
The base metal is iron - the active metal is zinc (galvanized)
If you do connect copper pipe to galvanized pipe, you will need a dielectric coupling or else the galvanized pipe will corrode. Same with connecting galvanized pipe to brass fittings. Brass is an alloy that contains copper and therefore the same electrolytic properties will exist unless a dielectric coupling is used. Hope that helps you out.
Use teflon tape with a little pipe dope. If you don't ever have to take apart again then you can use glue which you are calling cement
Cut it in the middle and replace it with 2 pieces with a union connecting them together.New answerIf the galvanized pipe is used for Vent or waste and your local codes permit YOU can cut the pipe remove it and install a shorter piece connected with a NO HUB Coupling. If the pipe is used for potable water cut out the galvanized pipe use a dielectric nipple then use a female x copper adapter to prevent electrolytic action
Metal LENOX
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
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.
Yes.
One inche metal pipe is filled with cement contrere and it has many curves. How can i clean that pipe
Yes, the kind you use for duct work.
ya the galvanized pipecan be use in undergrounds,,, because it is an iron pipe