API 5L X80 Pipe is a standardization for pipeline transportation systems within the rock oil, gas, water, and fossil fuel industries. API 5L-X80 steel is used in polar regions, wherever high toughness at low temperatures is needed.Product introduction API 5L X80 Pipe is a standardization for pipeline transportation systems within the rock oil, gas, water, and fossil fuel industries. API 5L-X80 steel is used in polar regions, wherever high toughness at low temperatures is needed.