To reduce the noise created by the exhaust gases.
NONE!!!! Zinc flakes are not good for a hydraulic system. Black pipe may be used for non-pressurized return and suction lines only.
galvanized iron pipes commonly used on water pipe lines, it is dipped into zinc for corrosion protection
Galvanized pipe is used for natural gas lines and pressure vent lines, and for electrical conduits. As a water supply or drain pipe, it is subject to rusting over time.
Either one CAN be used. Galvanized would be preferred in an environment high in chlorine or corrosive materials. Normally though, black pipe, or carbon steel, is used for fire protection because it is much cheaper.
Ribbed, bendable steel pipe used on combustion engine exhaust system.
Yes
You should use black pipe -- Galv. pipe will flake off inside of pipe
No. Galvanized pipe is what they used to use, and now should either be replaced with modern type of water pipe such as PEX or copper. COMMENT: Complete agreement. Galvanized served it's purpose and did bring water into a lot of people's homes for a lot of years. That was then, this is now. Today, it would be a dead last choice for a plumbing system.
Yes you can thats what they used to be made out of
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 only black pipe