Precautions for oil tank corrosion? Precautions for tank inspection

1.In addition to the above requirements, the concentration of combustible gas must also be analyzed, and the concentration of [wiki]**[wiki] lower limit is 4%; **Lower limit at 4%; The oxygen concentration is within the range of 19%, and the toxic and harmful substances do not exceed the "maximum allowable concentration of toxic and harmful substances in the air in the workshop" stipulated by the state;

2.Before the anti-corrosion operation in the tank, a detailed safety disclosure must be made to all construction personnel;

3.When entering the equipment for operation, there must be a special person to supervise the outside, and stipulate mutual contact methods and signals, and there are no obstacles inside and outside the entrance and exit of the equipment to ensure unobstructed;

4.The entrance and exit that can be ventilated on the tank should be fully utilized, the ventilation in the tank must be good, all the holes must be opened, and the axial fan should be installed on the manhole for ventilation;

5.Operators who enter the tank are not allowed to bring fire into the tank, smoking is strictly prohibited in the tank, and it is strictly forbidden to carry out operations that may produce open flames or electric sparks at the same time in and around the tank, such as paint, do not extinguish the fire with water, and use foam, dioxygen carbon fire extinguishers or dry powder fire extinguishers to extinguish the flames;

6.During the anti-corrosion operation, any electrical equipment and lighting that may cause fire shall not enter the tank, and the lighting in the tank must use explosion-proof charging lights;

7.Anti-corrosion must be equipped with anti-virus equipment, after working in the tank for a total of 2 hours, the activated carbon must be replaced, the staff in the tank must not work continuously, and the interval of 20 minutes must go outside the tank to rest for a while;

8.The staff entering the tank must be in good health, do not work with illness, and do not rest in the tank. When workers who are exposed to toxic and harmful substances have nausea, vomiting, dizziness, etc., they should immediately be sent to a well-ventilated place or sent for treatment;

9.The tank is equipped with a certain number of emergency rescue equipment and fire extinguishing equipment;

10.The manhole on the tank wall must be cordoned off, and the anti-corrosion operation is being carried out in the tank, and smoke and fire are strictly prohibited in the tank and around the tank wall (including the tank wall);

11.Count and register personnel before and after the operation, so that the personnel enter and exit consistently. Operators and guardians who enter the tank must be educated on safety emergency treatment and first aid methods.

Generally, enterprises are required to apply for safe construction work tickets, pay attention to the use of open flames, good ventilation, and oil and gas content lower than the construction standard. And it's always detected. Personnel need to go through professional training, and there are strict regulations on material management.

You can refer to the Fire Services Ordinance for drafting. Good luck.

1. The storage tank for storing combustible gas and flammable liquid should be equipped with the necessary fire-fighting equipment, and it is strictly forbidden to smoke in the tank, open flame lighting, heating, and bring its ignition source into the tank area. 2. For the storage tanks that store flammable, explosive, toxic, corrosive and other media, the relevant provisions of dangerous goods management should be strictly implemented. 3. Before the inspection and repair of the storage tank, the power supply of the electrical equipment related to the storage tank must be cut off, and the equipment handover procedures must be handled.

4. After the internal medium of the storage tank is exhausted, the inlet and outlet valves should be closed or blind partitions should be added to cut off the pipes and equipment connected to it, and obvious partition signs should be provided. 5. For the storage tank containing flammable, corrosive, toxic, or asphyxiating media, it must be replaced, neutralized, disinfected, cleaned and other treatments, and analyzed and inspected after treatment, and the analysis results should meet the provisions of relevant specifications and standards. It is strictly forbidden to replace it with air if it has flammable medium6, and the operation in the tank must apply for the license of Huinian industry in the tank.

If the operation is interrupted for a long time for any reason, the tank operation certificate should be reissued. 7. Sampling and analysis should be taken 30 minutes before entering the tank. Its oxygen content is between 18-23% (volume ratio) 8, when entering the tank to clean up toxic and corrosive residues, it is necessary to wear personal protective equipment 9, the scaffolding and lifting devices that need to be erected must be firm and reliable, and it is strictly forbidden to throw materials and tools inside and outside during the operation to ensure safe operation.

10. The voltage of the lighting in the tank should not exceed 24 explosion-proof lamps.

The anti-corrosion of oil storage tanks should be in accordance with GB T 50393-2017, in accordance with the design life (low: 2-5 years; Medium: 5-15 years; High: 15 years) corrosion class (I, II, III, IV) to determine the anti-corrosion system.

1. Adopt a covering layer.

The use of overlay anti-corrosion is to isolate the tank from the external environment, is the most common anti-corrosion measures, but also one of the most necessary measures, the design is also divided into inner wall use and external use, but also according to the different storage medium to choose the most suitable material for overlay protection.

2. Cathodic protection of storage tank.

For the anti-corrosion technology of some storage tanks, we often use spraying anti-corrosion coatings, and there is also a cathodic protection technology that focuses on the introduction, the best cathodic protection treatment is designed and installed at the same time as the storage tank, so that the construction method can not only save resources, but also reduce the follow-up installation and maintenance of subsequent cathodic protection.

In recent years, the tank cathodic protection has been made with a mixed metal oxide mesh anode system, which can make the current distribution evenly distributed. With the attention of people to the waste of resources, they have begun to praise the anti-corrosion effect of cathodic protection and use it.

Hello, 1. SY 0007-1999 "Code for Design of Corrosion Control Engineering for Steel Pipelines and Storage Tanks" 1, ** Tank: The surface resistivity of the bottom plate of the tank and the lower part of the tank wall can be used for the sedimentary water part of the tank wall should not be less than 1010 (in fact, it should be greater than 1011), but the electrostatic voltage in the tank should meet the requirements of the GB 6951 mandatory national standard, that is, the oil surface potential value should be less than 12000V and the requirements of the GB 6950 mandatory national standard, that is, the conductivity of the oil should be greater than 50PS m, in the actual operation process, the insulating anti-corrosion coating + sacrificial anode joint protection scheme can be used, and the anode should be aluminum alloy anode. The coating thickness is not less than 400 microns;

Tank anti-corrosion is a very strict project, the need for a lot of requirements, today Sanchao Cao manager will share with you the relevant provisions of oil tank anti-corrosion: 1. Anti-corrosion measures should be taken when designing storage tanks; The anti-corrosion project of the storage tank should be designed, constructed and put into use at the same time as the main project. 2. When the coating is used for protection, the design life of the anti-corrosion coating of the storage tank should not be less than 7 years.

3. For storage tanks with a tank diameter of not less than 8m, in addition to coating anti-corrosion coatings on the outer surface of the floor, cathodic protection can still be considered, and the design life of cathodic protection is not less than 20 years. Fourth, the inner surface of the tank floor and the inner surface of the wall plate below the oil-water boundary should be protected by a combination of sacrificial anode and insulating anti-corrosion coating, and meet the following requirements: 1. The surface resistivity of the anti-corrosion coating shall not be less than 10 is cubic, and the coating shall have heat resistance, oil resistance, salt resistance, water resistance and acid resistance; 2. The sacrificial anode should be made of aluminum alloy anode; 3. The design value of protection current density shall not be less than 10mA per square.

5. The construction of anti-corrosion projects shall be carried out in accordance with the provisions of the design documents. When it is necessary to change the design, substitute materials or adopt new materials, the confirmation of the original unit should be obtained. 6. The materials used in anti-corrosion engineering shall have product quality certification documents, and their quality shall comply with the provisions of this specification and the current relevant national standards.

The product quality certification documents should include the following contents: 1. The product quality is qualified and the material test report; 2. Quality technical indicators and anti-corrosion testing; 3. Re-inspection report or technical appraisal document. 7. The anti-corrosion project of the storage tank shall meet the following conditions at the same time before construction:

1. The design, construction, applicable materials, testing and other technical documents are complete, and the construction drawings have been reviewed; 2. The construction plan should be confirmed and disclosed by relevant parties, and technical training and safety technology education should be carried out; 3. All kinds of raw materials, construction tools and inspection instruments are qualified; 4. The protective facilities are safe and reliable, the raw materials, construction machinery and construction facilities are complete, and the construction water, electricity and gas can meet the requirements of continuous construction on site. 8. The anti-corrosion project in the storage tank should be collected and should be put into use only after the expiration of the maintenance period; The tank shall not be filled with water during the idle period. If the restriction period is longer than two weeks, it is advisable to take the necessary protective measures.

9. In addition to the provisions of the current national standards "Code for Fire Protection of Petrochemical Enterprises and Design" GB50160, "Safety Regulations for Coating Operations, Safety of Painting Process and Its Ventilation and Purification" GB6514, "Design Hygiene Standards for Industrial Enterprises" GB1 and "Code for the Design of Electric Installations in Fire Hazard Environments" GB50058, the provisions of other current national standards should also be implemented.

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Expertise in the anti-corrosion of tank depots.

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4.Detection: After the construction of the anticorrosive coating is completed, it <>

Testing is required, <>

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