Non Destructive Testing of Storage Tanks: Techniques and Applications

Non destructive testing of storage tanks is an important prerequisite for safe, reliable, and cost-effective operation. Non destructive testing of storage tanks is a set of techniques used to inspect these tanks without causing permanent damage. This article covers the different types of non destructive testing methods used in inspecting storage tanks, their benefits, and their applications.

What Is Non Destructive Testing Of Storage Tanks?

Non destructive testing of storage tanks is a set of methods used to inspect storage tanks without causing any damage to the structure or the contents of the tank. It is important to conduct non destructive testing of storage tanks because the production process of most chemicals and hydrocarbons is an impure process that results in a contaminated final product. This contamination is usually in the form of dissolved gases or other impurities that can be easily removed by a simple process of “stripping”. The impurities are removed from the product by passing it through a series of pipes, heat exchangers, etc. These structures are usually made up of metallic pipes and other components that are prone to corrosion. Corrosion inside the storage tank can lead to leakage, which may go undetected for a long period of time. The presence of impurities in the product from the storage tank can lead to loss of revenue, rejection of the product, and damage to the company’s reputation.

Different Types Of Non Destructive Testing For Storage Tanks

There are several different types of non destructive testing methods used to inspect storage tanks. This section covers some of the most common techniques: 

Ultrasonic Inspection- Ultrasonic inspection is a non destructive testing method used to examine the interior of the tank. During the ultrasonic inspection, a sound wave is used to penetrate the tank wall. It is then reflected back, and the time taken to travel and return is used to calculate the thickness of the tank wall. Ultrasonic inspection can be used to inspect storage tanks of any size. 

Fluid Sampling- Fluid sampling is a non destructive testing method used to sample the contents of the tank for analysis. If impurities are found in the contents of the tank, a chemical analysis can be performed to identify the type of impurity present. 

X-Ray Testing- X-ray inspection is a non destructive testing method used to detect internal defects in the tank. It uses an x-ray machine to detect flaws in the tank wall, such as cracks, corrosion, or other damage. X-ray inspection can be used for both new and existing tanks.

How Does Non Destructive Testing For Storage Tanks Work?

The process of non destructive testing for storage tanks varies depending on the technique used. However, all the methods have the following in common: 

- A sample of the contents of the tank is taken, usually through the top head, 

- The sample is then sent to a laboratory where it is tested, 

- The results of the tests are then fed back to the storage tank operator The operator can use this information to take appropriate action, such as removing the impurities from the contents of the tank or replacing the tank components that have shown signs of corrosion.

Benefits Of Non Destructive Testing For Storage Tanks

The main benefit of non destructive testing for storage tanks is that it can be conducted without causing any damage to the tank or the contents. This ensures that the integrity of the tank remains intact and that the process is not interrupted. Non destructive testing for storage tanks can help detect a problem before it becomes a major issue. For example, when corrosion is detected during non destructive testing, the operator can take appropriate action such as changing the cleaning chemicals. This can prevent corrosion from progressing and may prevent the need for more costly repairs. By conducting regular non destructive testing for storage tanks, the operation can be more efficient and the risk of disruption can be reduced.

Nano-Coatings To Increase The Life Of Storage Tank Components

A tank lining made of high-quality carbon steel has a working life of around 20 years. However, if the lining is not properly maintained, it can corrode and may have to be replaced earlier. To extend the working life of the lining, operators can use nano-coatings. Nano-coatings are very thin coatings applied on the surface of the lining. They are usually made up of graphite or silicon carbide. The nano-coatings are applied on the inside and outside of the lining. They are applied in such a way that they create an invisible barrier between the lining and the contents of the tank. It provides an extra layer of protection against corrosion and also helps retain the lining for longer.

See What We Can Do For You

Origin Endeavours provide Non Destructive Testing techniques for a wide variety of industries. Our specialists are educated in the newest technology to maintain your equipment, plant assets, and products reliable, operational, and safe. Our technicians can assess your facility using the most up-to-date technology to ensure a quick inspection procedure, resulting in reliable, operational, and safe products. We can customise a testing procedure from start to finish, including producing a computerized report at the time of testing, to accommodate your requirements. Contact us now!