Which of the Following Categories of Pipe is Black Pipe?
If you're standing in a hardware store aisle wondering which of the following categories of pipe is black pipe, you're basically looking for ungalvanized steel. It's that dark, heavy, slightly scaly-looking stuff that's usually tucked away near the gas fittings. It doesn't have the shiny, silver look of galvanized pipe or the bright orange-pink hue of copper. Instead, it's got a distinct matte finish that comes from the iron oxide formed during the manufacturing process. ...