Line pipes are a specific type of piping used in the transportation of fluids, such as oil, natural gas, and water, from one location to another. They are typically characterized by their durability, strength, and corrosion resistance. The specifications for line pipes often adhere to strict regulations and standards set by organizations like the American Petroleum Institute (API) and the American National Standards Institute (ANSI). These standards ensure that the pipes are capable of withstanding high pressure and extreme environmental conditions.