Re-galvanized: Pre-galvanized pipe is made of hot dipped galvanized steel strip directly.
● Hot dipped galvanized: Hot dipped galvanized pipe owns thicker zinc coating than pre-galvanized pipe. Black pipes will be dipped into zinc pool for galvanizing.
● Electro galvanized: The technology of electro galvanized pipe is similar to hot dipped galvanized pipe, but the thickness of zinc coating is less than hot dipped galvanized pipe.
● Painted: Painted pipe to remove the rust and clean the oil first and then paint the required color paint.
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