Abstract: According to the reguiremints of field petroleum pipeline far military purpose closed delivery and hatching delivery are used.When closed delivery is used,automatic control system and safeguard equipment should be installed in order to maintain a stable pressure and prevent waten hammering and over pressure.When hatching is used to deliver several products through a single pipeline,ultrasonic detector is used to determine the concentration of mixed up fuel,cut out the mixed-up section and guarantee the quality of the fuelsa.