1. Galvanized pipes have a zinc layer, while black pipes do not.
2. Black pipes are more suitable for transporting gas because they are prone to corrosion. On the other hand, galvanized pipes are very good for transporting water, but not for transporting gas.
3. Galvanized pipes are more expensive because they have a zinc layer.
4. Galvanized pipes are more durable than black pipes.

1. In terms of color, black pipe is black as its name suggests; while galvanized pipe is a silvery white or gray pipe, which will appear this color after being plated with zinc.
2. The materials used are also different. Black pipes are usually made of cold-rolled or hot-rolled plates; while galvanized pipes are made of cold-rolled plates that have been galvanized. Since galvanized pipes are coated with zinc on the surface, they can effectively prevent corrosion and rust, so they can be used in a wider range of applications.
Although black pipes and galvanized pipes are both pipes, the price of black pipes is relatively low, which has cost advantages; while the price of galvanized pipes is higher, compared with other similar products, they have a longer service life and a more appropriate cost.

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