The compressed air tank is one of the essential components of the compressed air production line. Despite its simplicity, it has a special function and many effects on compressed air  quality

The compressed air tanks are cylindrical, and two convex metal lenses are used at both ends. A round-shaped form without sharp corners at the two ends of the tank, which are the same lenses, divides the pressure distribution equally as possible because the sharp corner or edge is known as the stress enhancers and weak the firmness of the tensile structure and should be avoided as much as possible.

Compressed air tanks provide saved energy for consumers, similarly to the battery.

The request for air consumed in the production process varies at different times, and compressed air tanks make it possible to provide consumers with uninterrupted compressed air.

Consider many machines in a factory that uses compressed air simultaneously. In this case, the request for compressed air increases rapidly. Suppose there is no storage or an air battery. In that case, the pressure inside the system will be reduced rapidly, causing the machinery to be disrupted and stopped.

Turning compressors on and off or out of the circuit and circuit (loading and unloading) causes pressure fluctuations. Still, a pressure tank eliminates these rates and fluctuations and offers a constant, uniform pressure.

If a compressed air system is not equipped with a tank, the frequency, stoppage, and reset up of the compressors will increase, as well as the period of loading and unloading of the compressor will be out of control, which in addition to the severe pressure fluctuations, leading to a decrease in compressors' performance, increases energy consumption as well as a decrease in the life of compressors.

The air is heated after leaving the compressors by reducing volume and increasing pressure. By storing compressed air in a pressure tank, heat exchange with the tank's surroundings is carried out, thereby reducing the air temperature inside the tank. Reducing air temperature will make more humidity density, resulting in condensate formation and discharge from the system. In a way, it can be said that the compressed air tank plays the role of a dehumidifier in the compressed air line.

Selecting the volume of the compressed air tank should be done with different and decisive factors. In the case of non-expert selection, it will also lead to damage. The selection of compressed air tanks should be such that the compressor is avoided and turning on and off the compressors continuously, as these successive turning on and off affect the power grid of the manufacturing unit. Also, over time and repetition of this event damages the compressors and reduces their life.

The correct selection of the volume of the compressed air tank will not be overloaded or over-unloaded compressors and will provide them with the time needed to cool.

After calculating and specifying the volume of the required compressed air tank, check the location of the desired tank to consider the possible restrictions for transportation and installation on site.

In addition, two or more tanks can be used if there are restrictions on height and transportation.

Climate conditions and environmental conditions are very important.

The following factors should be considered when purchasing and selecting compressed air tanks.

The temperature of the tank deployment location or proximity to flammable materials

The amount of air humidity at the tank deployment location

Probability of deployment in the vicinity of acidic or salt environments (coastal)

The minimum temperature and maximum climate of the deployment location of the tanks

Therefore, many factors and cases effectively calculate the volume and dimensions, the thickness of the sheet and its type, and the interior and exterior coatings of compressed air tanks that must be considered when ordering.

Roll Air Company has provided the conditions for esteemed customers to provide two categories of compressed air tanks according to their needs.

For both categories of compressed air tanks, accessories such as hand pressure gauges, relief valves, and automatic electric discharge valves associated with oil and water condensate will be delivered as side accessories of tanks to the customer.

Also, given that maintaining and paying attention to non-corrosion of the internal surface of the tanks is essential to maintain the safety of the tanks and lack of attention can lead to irreparable damage, Roll Air Company is a strong recommendation to all customers to install a condensate (water and oil) separator filter before installing compressed air tanks.

The capacity of more than 1,000 liters has a visiting valve for periodic repairs and maintenance, and all tanks are equipped with hooks for ease of transportation.

The maximum volume of compressed air tank registered in this company is 20,000 liters.

The use of premium alloy metal sheets for pressure tanks

Submerged arc welding and standard manual welding by experienced welders with valid certificates

Complete sandblasting and cleansing of the internal and external surfaces of the tanks before entering the stage of creating a coating

Implementation of internal coating of tanks using epoxy coating material with a thickness of 100 to 120 µ

Implementation of external coating of epoxy color with a thickness of 100 to 120 µ

Conducting a hydrostatic test and presenting its documentation

All design and construction steps are based on Standard ASME SECTION VIII

Experiments such as radiography, sheet thickness control and provision of calibration certification, and relief valve are possible and conducted based on customer request.

All stages of construction of compressed air tanks, such as the type of raw materials, inspection of the process of construction and welding, and how the color coating is controlled by the quality control unit exactly. For example, we can mention some of them:

• Dimensional inspection of the marks before cutting the sheets
• Monitoring and control over the preparation of the edges of the sheet
• Visual and dimensional inspection of cutting sheets
• Control of initial rolling of the sheets according to maps
• Monitoring sheet assembly and its longitudinal seam welding
• Welding visual inspection
• Monitoring assembly and welding of environmental seams
• Control over assembly and welding of the first and second lens to the shell or body of the tank
• Monitoring flanges welding assembly
• Monitoring tension monitor (after-welding heat treatment)
• Monitoring the cleaning and cleanliness of the interior surfaces of the tank
• Monitoring the conduct of the hydrostatic pressure test
• Final visual and dimensional inspection after the pressure test
• Monitoring sandblast and tank color
• Monitoring of the tank loading
• Monitoring the implementation of non-destructive tests requested by customers