In-line pumps are centrifugal pumps, whose pump discharge and pump suction nozzles lie in a straight line of piping. It is often used in building services applications (e.g. heating and air conditioning).
Refinery pumps transport petroleum and its derived products in refineries, petrochemical plants and the chemical industry. They are used in temperature ranges from -120 °C to +450 °C at pressures of about 65 bar.