What are the differences between black, galvanized, and stainless steel finishes?

Jun 12, 2023 | Industry News, News

Black, galvanized, and stainless steel are three common finishes for steel pipe fittings, and they each offer different properties and advantages.

Black steel: Black steel pipe fittings are uncoated and have a dark, matte finish. They are usually made from carbon steel, which makes them strong and durable, but also susceptible to corrosion. Black steel fittings are typically used in low-pressure applications such as gas and water supply lines, as well as in fire sprinkler systems.

Galvanized steel: Galvanized steel pipe fittings are coated with a layer of zinc to protect against corrosion. The zinc coating creates a shiny, silver finish and makes the fittings more resistant to rust and corrosion. Galvanized steel fittings are commonly used in outdoor and high-moisture environments, such as water supply lines and outdoor plumbing.

Stainless steel: Stainless steel pipe fittings are made from an alloy of steel and chromium, which makes them highly resistant to corrosion and staining. They have a shiny, silver finish and are ideal for use in high-pressure and high-temperature applications, as well as in environments with corrosive fluids or chemicals.

In summary, black steel fittings are strong and durable but susceptible to corrosion, galvanized steel fittings are coated with zinc to protect against corrosion and are ideal for outdoor and high-moisture environments, and stainless steel fittings are highly resistant to corrosion and staining and are ideal for high-pressure and corrosive applications. The choice of finish will depend on the specific application and environment in which the fittings will be used.