Blacksteel pipe is one type of iron pipe that is designed to have a black color on its surface. This type of pipe is widely used in hydrant installations or fire extinguishing systems. This pipe has a dark iron oxide layer on its surface. This pipe used in its application does not require galvanized steel. Blacksteel pipes are also widely used for a variety of industrial applications, including those for the natural gas, petroleum, and exhaust systems industries. Blacksteel hydrant pipes are widely used in several industrial sectors because they require little maintenance.