The phrase "steel pipes" refers to hollow tubes made out of steel, which are often used in construction or plumbing for transporting liquids or gases. Full definition
It also says the rules will raise the risk of dangerous air pockets and cracks as a result of the requirement to pour cement around the lining of steel pipes used in wells. (cfact.org)
I wanted a reclaimed barn wood and steel pipe look and I didn't want to spend more than $ 100. (wellnessmama.com)