Guidelines for the regular maintenance and cleaning of double-layer oil tanks at skid-mounted fuel station

Daily maintenance work is essential for operating skid-mounted fuel station, especially the maintenance and cleaning of double-layer oil tanks. However, sometimes we find that the double-layer oil tanks we just cleaned need to be cleaned again within less than two weeks. In fact, this is because we did not strictly follow the prescribed cleaning steps during the cleaning process. Below we will introduce the specific work steps for timely maintenance and cleaning of double-layer oil tanks.

Preparation before cleaning

1.Safety assessment: Conduct risk assessment before operation and identify potential sources of danger.

2.Equipment inspection: Ensure that the cleaning equipment is intact and the explosion-proof performance meets the requirements.

3.Staff training: All participants must receive safety training and operation instructions.

4.Protective equipment: Prepare personal protective equipment such as gas masks, protective clothing, and anti-static shoes

5.Empty the oil tank: Thoroughly empty the residual oil in the tank and ventilate

Cleaning steps

1.Ventilation replacement

Open all vents and force ventilation for at least 24 hours.

Use a combustible gas detector to detect the gas concentration in the tank.

2.Preliminary cleaning

Remove sediment and residues at the bottom of the tank

Use explosion-proof tools to remove stubborn dirt

3.High-pressure water cleaning

Use professional high-pressure cleaning equipment (pressure controlled at 50-70MPa)

Clean from top to bottom in sections to ensure full coverage

4.Chemical cleaning

Use special oil tank cleaning agents (must meet environmental protection requirements)

Completely drain after cyclic cleaning

5.Drying treatment

Use explosion-proof fan for drying

Check to confirm that there is no residual moisture

Special precautions

1.Explosion-proof requirements: All equipment must meet explosion-proof standards.

2.Environmental treatment: Cleaning wastewater must be professionally collected and treated and must not be discharged at will.

3.Double-layer tank detection: After cleaning, the interlayer of the double-layer tank needs to be leak-tested.

4.Operation monitoring: A dedicated person is required to monitor the entire process and keep communication open.

5.Emergency plan: Prepare a complete emergency treatment plan.

Inspection after cleaning

1.Internal visual inspection for no residue.

2.Gas detection qualified.

3.Double-layer tank sealing test.

4.Equipment reset inspection.

Six benefits of regular cleaning

1.Improve oil quality and protect customer interests

Remove sludge, moisture and impurities deposited at the bottom of the tank to prevent oil pollution.

Reduce the accumulation of harmful substances such as colloids and asphalt to ensure fuel purity.

Avoid engine failure or customer complaints due to oil deterioration.

2.Enhance safety performance and reduce accident risks

Remove flammable residues to reduce fire and explosion hazards.

Prevent static electricity accumulation and reduce the possibility of accidents caused by static electricity sparks.

Check the integrity of double-layer tanks to detect potential leaks or corrosion problems in time.

3.Extend the service life of oil tanks and reduce maintenance costs

Regular cleaning can reduce corrosion on the inner wall of the tank and extend the service life of the oil tank.

Avoid equipment damage caused by long-term fouling and reduce maintenance costs.

Maintain efficient operation of oil tanks and reduce problems such as filter blockage caused by pollution.

4.Comply with environmental regulations and avoid penalties

Prevent oil tank leakage from contaminating soil and groundwater (double-layer tanks still need to be inspected regularly).

Comply with the requirements of national regulations such as the "Technical Guidelines for Groundwater Pollution Prevention and Control at Gas Stations".

Avoid fines or suspension of business due to non-compliance with environmental protection standards.

5.Optimize oil tank storage efficiency

After removing the sediment, the effective capacity of the oil tank increases, improving the oil storage efficiency.

Reduce oil waste and improve economic benefits.

6.Easy to detect and maintain

It is easier to check whether the tank body has cracks, corrosion or leakage after cleaning.

Provide a good foundation for subsequent anti-corrosion and anti-rust treatment.

Recommended cleaning cycle

Light oil (gasoline, diesel), It is recommended to clean once every 3-5 years.

If the oil is abnormal or there is too much sediment at the bottom of the tank: Clean it immediately.

Combined with regular oil tank inspection, ensure safety and compliance.

The above are the specific steps for timely maintenance and cleaning of double-layer oil tanks at skid-mounted fuel station. I hope that the above explanation can be of some help to everyone in the future when maintaining skid-mounted fuel station. In daily work and production, we must complete the work in accordance with regulations to ensure quality and quantity, otherwise it may be necessary to rework the operation.

Written by

TAIAN SHENGDING METAL CONTAINER MANUFACTURING CO., LTD.

Editor Wang

www.self-bunded-tank.com

WhatsApp:+86 152 5486 3111

Email:shengdingtank@126.com