What is the difference between 'galvanized' and 'black' pipe?

The distinction between galvanized and black pipe primarily centers around the corrosion resistance provided by their respective coatings. Galvanized pipe is coated with a layer of zinc, which serves a protective function against rust and corrosion. This makes galvanized pipe particularly suitable for applications involving water or environments where moisture is present, as the zinc coating helps to prolong the life of the pipe by preventing oxidation.

In contrast, black pipe, which is simply a type of steel pipe that has not been treated with any additional coatings, is more susceptible to rust when exposed to moisture or aggressive chemicals. Therefore, while both types of pipe can be used in various applications, galvanized pipe has the advantage when it comes to durability in wet conditions due to its protective zinc layer.

This unique feature allows for a broader range of usage scenarios for galvanized pipe, particularly in plumbing applications that require resistance to corrosion. Understanding this difference in coating and its implications is crucial for making the right choice for specific projects in pipefitting.