When to use a fixed roof tank, when to use a floating roof tank

1. Fixed top storage tank. Fixed roof storage tanks can be divided into conical top storage tanks, vault storage tanks, and self-supporting umbrella storage tanks. 2. Incapacitated torque top storage tank (catenary type incapable torque storage tank).

The tank is made of thin steel sheets according to the catenary theory. The longitudinal section of its roof is in the shape of a catenary curve. Since the tank roof of this shape is only subjected to tensile forces and does not produce bending moments.

Both fixed-roof tanks and floating-roof tanks are common devices for storing liquids, but they are used in different scenarios.

Fixed top storage tanks are suitable for storing low volatile liquids such as petroleum, diesel, lubricating oil, etc. These liquids are less volatile and do not evaporate easily, so there is no need for a floating roof to control evaporation losses. In addition, the structure of the fixed-top tank is relatively simple and the maintenance cost is low.

The floating roof storage tank is suitable for storing highly volatile liquids, such as gasoline, ethanol, methanol, etc. These liquids are highly volatile and easily evaporate, so floating roofs are required to control evaporation losses. The floating roof can fluctuate up and down with the change of liquid level, thus maintaining the stability of the liquid surface and reducing evaporation losses.

In addition, the floating roof tank also prevents the liquid from coming into contact with the air, reducing oxidation reactions and contamination.

In short, the choice of fixed-roof storage tank or floating roof storage tank needs to be decided according to the volatility and storage requirements of the liquid. In practical application, it is also necessary to consider the cost, maintenance difficulty, safety and other factors of the storage tank, and make a choice after comprehensive consideration.

First, the role is different.

1. Outer floating roof storage tank: an open cylindrical steel storage tank for storing volatile petroleum products such as **, gasoline or kerosene.

2. Inner floating roof storage tank: a savings tank that plays a limiting role.

Second, the characteristics are different.

1. Outer floating roof storage tank: The outer floating roof rises or decreases with the level of storage liquid.

2. Inner floating roof storage tank: a top cover made of lightweight material is placed on the profile.

Third, the advantages are different.

1. Outer floating roof storage tank: There is a drainage system on the floating roof to ensure that the accumulated water can be discharged smoothly in rainy and snowy days to avoid sinking plate accidents.

2. Inner floating roof storage tank: the inner floating plate floats on the liquid surface, so that there is no evaporation space for the liquid phase, which can reduce the evaporation loss by 85% to 90%; In addition, the floating disc blocks the air and the reservoir, reducing air pollution and reducing the risk of fire.

The difference between the outer floating roof storage tank and the inner floating roof storage tank is: different structures, different storage mediums, and different characteristics.

1. The structure is different

The inner floating roof is to add a sealed flat top in the tank on the basis of the fixed tank, and the flat top is in contact with the liquid in the tank when generally working.

The outer floating roof refers to the fact that the top of the tank moves up and down with the height of the liquid, and is not welded with the tank wall.

2. The storage medium is different

The large-capacity storage is the outer floating roof tank, and the storage of refined oil is the inner floating roof oil tank.

3. The characteristics are different

The inner floating roof tank is a combination of the vault and the floating roof, the outside is the vault, the inside is the floating roof, the internal floating roof can reduce fuel consumption, and the external floating roof can avoid rain, dust and other foreign objects into the tank, this tank is mainly used to store light oil products such as aviation kerosene.

The tank top of the outer floating roof oil tank is directly placed on the oil surface, and floats up and down with the entry and exit of the oil product, and there is a sealing device that moves up and down with the floating roof between the annular gap between the floating roof and the tank inner wall. The tank virtually eliminates gas space, so oil evaporation losses are greatly reduced.

Fixed roof, outer floating roof and inner floating roof storage tanks.

1. The fixed top tank refers to an upright cylindrical storage tank with a fixed roof, and the fixed top tank generally refers to the "fixed top storage tank". The inner floating roof storage tank is to install a shaft on its internal axis, and the internal floating roof tank generally refers to the "internal floating roof storage tank". An external floating roof tank is an upright cylindrical tank with a floating top cover.

The outer floating roof tank is also known as the "floating roof tank".

2. When the fixed roof is a vault, it is also called "vault storage tank". It is mainly composed of tank top, tank wall and tank bottom. The inner floating roof tank is a top lid made of lightweight material that is placed in the profile.

The top of the outer floating roof storage tank floats on the liquid surface and rises and falls with the change of liquid level, and the floating roof structure has a single disc type, a double disc type and a shallow disc type.

3. The tank wall of the fixed top tank is composed of multiple circles of steel plates, and the thickness of the steel plate of the tank wall is gradually thinned from bottom to top along the height of the storage tank. The inner floating roof storage tank is formed by adding a floating roof inside the vault storage tank. The floating roof storage tank of the outer floating roof tank is composed of a floating roof floating on the surface of the medium and a vertical cylindrical tank wall.

4. The bottom of the tank of the fixed top tank is assembled by a plurality of steel plates, the middle part of the steel plate is called the middle plate, and the surrounding steel plate is called the edge plate, and the thickness of the edge plate is thicker than the middle plate. The addition of a floating roof in the tank of the inner floating roof tank can reduce the volatile loss of the medium, and the external vault can prevent rain, snow and dust from entering the tank to ensure the cleanliness of the medium in the tank. The floating roof of the outer floating roof tank rises and falls with the increase or decrease of the medium reserves in the tank, and there is an annular sealing device between the outer edge of the floating roof and the tank wall, and the medium in the tank is always directly covered by the inner floating roof to reduce the volatilization of the medium.

5. The top of the tank is composed of a number of 4 6mm thick fan-shaped thin steel plates and stiffeners, and the top of the tank and the wall of the tank are generally lapped single-sided welds, and the structure supporting the weight load of the tank top can be self-supporting or supporting. The inner floating roof tank adopts a linear tank wall, the wall plate is butt welded, and the vault is made according to the requirements of the vault storage tank. The volume of the outer floating roof tank is generally relatively large, and its bottom plate is made of bowed edge plates.

6. The bottom of the fixed top tank is assembled by a plurality of steel plates, the middle part of the steel plate is called the middle plate, and the surrounding steel plate is called the edge plate, and the thickness of the edge plate is thicker than the middle plate. There are two types of internal floating roofs: one is a steel floating roof that is the same as the floating roof storage tank, and the other is an assembled aluminum alloy floating roof.

The wall of the outer floating roof tank adopts a straight tank wall, and the butt weld should be polished smooth to ensure that the inner surface is smooth. The upper part of the floating roof storage tank is open, in order to increase the stiffness of the wall plate, according to the size of the wind load in the area, the top of the tank wall needs to be provided with a wind-resistant ring beam and a reinforcing ring.

The fixed top tank is also called the vault tank, and the vault storage tank refers to a steel container with a spherical crown and a cylindrical tank with a tank top.

Therefore, even if the rotational molding of large and extra-large plastic parts, anti-corrosion storage tanks, etc., there is no need to use very cumbersome equipment and molds, and the processing and manufacturing of the machine mold is very convenient, the manufacturing cycle is short, and the cost is low.

Theoretically, there is almost no upper limit in size for parts molded by the rotational molding process. However, it is easy to make wisdom due to the limitations of production conditions and road transportation. The production of such large plastic containers, such as spit molding, does not require very expensive and bulky blow molding.

Equipment is impossible.

Suitable for molding large and extra-large parts:

The vast majority of plastic molding processing technology, in the molding process, plastic and mold Hu Yu are under a fairly high pressure (pressure), such as injection molding, compression molding, extrusion and other widely used injection molding, compression molding, extrusion and so on, so the application of these molding processes to produce large plastic parts, not only must use the Lingda mold that can withstand a lot of pressure, so that the mold becomes bulky and complex.

Moreover, the plastic molding equipment must also be designed and manufactured very firmly, and the processing and manufacturing difficulty of the machine mold increases accordingly, and the cost increases. In contrast, the rotational molding process only requires the frame to be strong enough to support the weight of the material, the mold and the frame itself, as well as the closing force to prevent material leakage.

A fixed-top storage tank is a common equipment for storing liquids or gases, which is usually used in industrial production, petrochemical industry, chemical engineering and other fields. It is characterized by a fixed top, non-movable, usually made of materials such as steel or concrete, and has high corrosion and pressure resistance.

The main structure of the fixed top storage tank includes the tank body, top cover, inlet and outlet pipelines, valves, instruments and other components. The tank is usually cylindrical or rectangular in shape, and the inside is coated with an anti-corrosion macro layer to protect the tank from corrosion. The top cover is usually round or square, fixed to the top of the tank, and can be used for the entry and exit of liquids or gases through the inlet and outlet pipes.

Fixed top storage tanks are used in a wide range of applications and can be used to store various liquids and gases, such as oil, gas, chemicals, food, beverages, etc. It has the advantage of large storage capacity and small footprint, which can effectively protect the quality and safety of stored substances.

However, there are also some disadvantages of fixed top storage tanks, such as the top cannot be opened, which is difficult to clean and maintain; The top is fixed, which cannot adapt to different storage needs; It is susceptible to the impact of natural disasters and man-made damage, and there are certain safety hazards.

In a word, the fixed top book storage tank is a common storage equipment, which has a wide range of application prospects and important economic value. During use, it is necessary to pay attention to safety and maintenance to ensure the quality and safety of stored substances.

That is, the design pressure is atmospheric pressure, that is, it is basically the same as the atmospheric pressure, the fixed top tank, the inner floating roof, the outer floating roof all belong to this, generally speaking, the fixed top tank is also called the vault tank, and the inner floating top tank is known as adding a layer of inner floating plate on the basis of the bright wax rolling of the vault tank to float on the oil surface. The outer floating roof tank is generally used for storage **, that is, the top of the tank floats up and down with the remaining oil surface.

A fixed top tank is a tank where the top of the tank is fixed and cannot be moved up and down.

An internal floating roof tank is one in which the top of the tank is supported by a floating element (usually a pontoon), which floats up and down as the material inside the tank increases. When the substance inside the tank increases, the pontoon rises; When the substance inside the tank decreases, the pontoon is lowered. This ensures the safe operation of the tank and prevents the tank**.

An external floating roof tank is one in which the top of the tank is supported by a floating element (usually a pontoon), but this pontoon is located on the outside of the tank. It works similarly to the internal floating roof tank, which also fluctuates up and down according to the increase or decrease of the material inside the tank.

In general, both the inner and outer floating roof tanks have high safety and reliability, which can effectively prevent storage tanks**. However, compared with the inner floating roof tank, the outer floating roof tank is slightly more complex in terms of installation and maintenance, and the cost is slightly higher than that of the inner floating roof tank.

The internal floating roof storage tank also has its own disadvantages, that is, it is generally only suitable for storing liquids (edible oil, petrochemical oil, chemical reagents, volatile liquids, etc.), and is not suitable for liquid-solid mixtures.

Fixed roof, outer floating roof and inner floating roof storage tanks.

Internal floating roof storage tank and external floating roof storage tank are two common types of storage tanks, and their difference mainly lies in the location and structure of the floating roof.

The inner floating roof storage tank refers to the storage tank with the floating roof located inside the storage tank, and the floating roof is usually made of aluminum alloy or stainless steel socks, which can float up and down with the change of liquid level in the storage tank. The advantage of the internal floating roof storage tank is that it can reduce the area of air contact with the liquid inside the tank, thereby reducing the possibility of liquid evaporation and oxidation, and at the same time, it can also reduce the sediment and impurities inside the storage tank to ensure the quality and safety of the stored substances.

The outer floating roof storage tank refers to the storage tank with the floating roof located on the outside of the storage tank, and the floating roof is usually made of steel, which can fluctuate up and down with the change of liquid level in the storage tank. The advantage of the external floating roof storage tank is that it can reduce the area of air contact with liquid inside the tank, thereby reducing the possibility of liquid evaporation and oxidation, and at the same time, it can also reduce the sediment and impurities inside the storage tank to ensure the quality and safety of the stored substance. In addition, the external floating roof storage tank can also discharge the gas in the storage tank into the atmosphere through the pipeline, thereby reducing the pressure of the gas inside the storage tank and ensuring the safety of the storage tank.

In general, both the inner floating roof storage tank and the outer floating roof storage tank have their own excellent reputation and scope of application, and the choice of which storage tank type needs to be comprehensively considered according to the specific storage material and use environment.

The inner floating roof storage tank is a common equipment for storing or this liquid, which is characterized by a floating roof set inside the tank, which can float up and down with the change of liquid level. The internal floating roof storage tank is usually used to store volatile, flammable, explosive, toxic, harmful and other dangerous chemicals, such as petroleum, chemicals, liquefied gas, etc.

The main structure of the inner floating roof storage tank includes tank body, floating roof, diversion pipe, fireproof foam and so on. The tank body is usually welded with steel plate, which has high strength and corrosion resistance. The floating roof is made of lightweight materials, such as aluminum alloy, stainless steel, etc., which can float up and down with the change of liquid level, thus effectively reducing the area of rapid contact between the air and liquid in the tank, and reducing the possibility of volatilization and oxidation.

A diversion pipe is a pipe used to guide liquid in and out of the tank, usually on the top or side of the tank. Fireproof foam is a safety measure used to prevent fire in the tank, which can form a layer of foam inside the tank, effectively isolating the oxygen in the tank, so as to prevent the occurrence of fire.

The internal floating roof storage tank has the following advantages: firstly, it can effectively reduce the volatilization and oxidation of the liquid, so as to maintain the quality and stability of the liquid; Secondly, it can reduce the area of air contact with liquid in the tank, thereby reducing the oxygen content in the tank and reducing the risk of fire; Finally, the internal floating roof storage tank has high safety and reliability, which can effectively protect the safety of personnel and the environment.

In a word, the internal floating roof storage tank is an important equipment for storing hazardous chemicals, which has high safety and reliability, and can effectively protect the safety of personnel and the environment.