How to operate the airtight unloading of gas station? Connection and record requirements for oil and gas recovery of unloading

How to operate the airtight unloading of the gas station? Direct answer: The core is three things-the oil and gas recovery pipe of the oil tanker is reliably connected with the gas phase interface of the oil tank, and the whole process of unloading oil is kept airtight. It is strictly forbidden to directly discharge and open the exhaust valve without authorization. In operation, the gas phase pipe is connected first and then the liquid phase pipe is connected. During oil unloading, the interface shall not leak. During oil collection, the oil stored in the pipeline shall be returned to its position according to regulations. Conditional station according to the regulatory requirements of the whole process of unloading video recording. Unloading is the key link of oil and gas emissions at gas stations, and the emissions of one open unloading can top dozens of refueling.

Connection sequence is exquisite

The standard sequence is to connect the oil and gas recovery pipe first, then connect and unload the oil pipe; on the contrary, remove the oil pipe first and then remove the recovery pipe. This sequence ensures that the gas-phase circuit is on at all times-the liquid has not yet begun to flow and the return path is already in place. Check in place after the interface is connected: the buckle is locked, the sealing surface is clean, and there is no sign of leakage. The pipe diameter of the joint of the oil and gas recovery hose shall be matched, and there are ten to nine leaks at the joint made with the diameter reduction. Opening the pump when the connection is not in place is the most common human error in the oil unloading process.

What to see in the oil unloading process

During the operation of the pump, the eyes of the monitoring and unloading personnel shall not be separated from three places: whether there is any sign of leakage at the interface, whether the pressure gauge or liquid level meter of the oil tank is normal, and whether there is obvious oil smell on site. If the pressure rises abnormally, stop the pump first and then check it, which is mostly because the gas phase circuit is blocked or the breathing channel of the oil tank is not smooth. If any leakage is found, stop the pump immediately. Don't hold the mentality of "let's talk about it after unloading the car"-the leakage point will only increase with the increase of pressure. After receiving the oil, stop for a moment according to the regulations, let the residual oil in the hose flow into the tank by itself, and then remove the interface. Supervisory and unloading personnel shall not leave the operation area during the whole process, and one person shall operate and one person shall supervise during double operation.

Operation and Record

1. Check the oil product and tank number, and confirm the tank capacity and liquid level;
2. First connect the oil and gas recovery pipe and check whether the seal is in place;
3. After connecting and unloading the oil pipe, slowly start the pump;
4. Process monitoring interface, pressure and odor;
5. Dismantle the pipes in the order of liquid before gas after stopping oil collection;
6. Register the unloading oil quantity, time, operator and process conditions.

Record and Shift

The records shall be filed according to the station management system, and the video records shall be kept according to the regulatory requirements. These materials are usually archives, the first evidence when something goes wrong. The succession regards the unloading of oil as the content of the handover. Write down the abnormal situation clearly and don't leave the next shift in the dark.

Common Violations

There are many types of supervision: unloading oil directly without connecting the recovery pipe-using the liquid phase pipe as the exhaust pipe; The gas phase is connected but the buckle is not locked-form connection; To "unload quickly", remove the recovery pipe in advance-with pressure to remove the interface, splash and discharge; It is convenient to skip the inspection of the oil unloading map at night. These all have one thing in common: the province is a few minutes, and the bet is safety and compliance. The operation process is pasted on the oil unloading area and operated according to the order, which is more reliable than the sense of responsibility.

What if the gas phase pipe cannot be connected?

Stop unloading, check the interface specifications and blockage, and reconnect with a variable diameter or clean it; It is strictly prohibited to skip the gas phase connection and directly unload oil.

Is it normal for the tank pressure to rise during oil unloading?

Short term pressure fluctuations are normal, and if they continue to rise, the pump should be stopped to check the gas phase circuit and the oil tank breathing channel; Forcefully unloading oil under pressure is a clearly prohibited area.

How long should video recordings be kept?

According to local regulatory requirements, suggestions without clear requirements should be synchronized with the unloading records to ensure traceability.

This article is organized by Luoyang wohong petrochemical equipment co., ltd. the company provides design, manufacture, installation, commissioning and operation and maintenance services for oil and gas recovery equipment, solvent recovery devices and buried composite pipe networks at gas stations, oil depots and chemical enterprises. if you need scheme configuration or on-site investigation, please contact and exchange.