EEMUA 159 tank inspection: what’s our process? 

Tanks play a vital role in storing various substances, ranging from chemicals to oil and gas. Ensuring the integrity and safety of these tanks is of the utmost importance to protect both the environment and human lives. 

Clients often contact us to find out more about the process of tanker testing and tank inspection. We use a range of NDT (non-destructive testing) techniques and follow the EEMUA 159 tank inspection process, with a qualified EEMUA 159 tank inspector signing off on our work. 

In this blog, we will outline the process that we go through, from initial contact to the final report. 

Tank Inspections: our process 

1. Discovery

We are always happy to hear from potential clients regarding tanker testing and tank inspections. After the first contact, we will have a detailed conversation with you to discuss your situation and what you need from the job. We will discuss the range of NDT options available and put together a comprehensive testing plan. 

We may ask for documentation related to your tank, such as construction and design drawings, previous inspection reports, and any maintenance records. Reviewing this information helps us to understand the tank’s history and identify any recurring issues.

An NDT Group technician will then visit your site to carry out the NDT testing. Beginning with a visual inspection, these testing techniques will include a range of NDT methods, such as Ultrasonic Testing, Magnetic Particle Inspection, Eddy Current Inspection, Phased Array, Radiography, and corrosion mapping

2. Visual Inspection 

Visual inspection is a crucial part of the EEMUA tank inspection process. Our technicians carefully examine the external surface of your tank, looking for signs of corrosion, leaks, cracks, or other damages. Special attention is given to vulnerable areas, such as welds, seams, supports, and attachments. 

Advanced techniques like drones or remote-controlled cameras might be used to reach difficult-to-access locations. Visual inspection also involves assessing the condition of external fittings, valves, and pipelines connected to the tank.

We’ve outlined a few of the stages we follow to inspect your tank following the visual inspection and these are explained below. We are not limited to these stages, but these are the most important ones.  

3. Ultrasonic Thickness Measurement

Ultrasonic testing is used to evaluate the tank’s shell’s condition. This non-destructive testing technique helps determine the thickness of the tank’s walls and identifies areas where corrosion might have compromised the material integrity. 

Our technicians use ultrasonic devices to measure the thickness at multiple points across the tank’s surface, creating a comprehensive thickness profile. Deviations from the expected values can indicate corrosion, erosion, or other structural concerns.

4. Internal Inspection

An internal inspection of the tank might be carried out to assess its condition thoroughly. This process involves either draining the tank or entering it for a closer examination. We closely follow confined space entry guidance to ensure the safety of our technicians. 

Internal inspections help identify any internal corrosion, scale build-up, coating deterioration, or structural abnormalities that may require attention.

5. Corrosion mapping

Corrosion mapping helps technicians to build up a detailed image of the structural integrity of the tank. We most often use our corrosion mapping robotic crawler to help us achieve this. 

6. Reporting and Recommendations

A qualified EEMUA 159 tank assessor will sign off on our tank inspection. 

After a tank has been inspected by one of our NDT technicians, a qualified EEMUA tank assessor will check the results against the EEMUA 159 documentation. After completing the inspection, a detailed report is prepared, outlining the findings, observations, and recommendations. 

What is EEMUA 159? Find out more

The report includes information about the tank’s current condition, identified defects, and potential risks. If any repairs or maintenance work is required, it is clearly outlined in the report with recommended timelines. This report is a crucial document to help you make informed decisions regarding necessary actions and future maintenance plans.

EEMUA 159 Tank Inspections 

Regular tank inspections are vital to ensure the safety and integrity of your storage tank. Using a range of NDT techniques, we follow the EEMUA 159 tank inspection process when inspecting tanks. 

Our technicians will build up a comprehensive picture of the state of your tank, using selected NDT techniques. An EEMUA 159 tank inspector will check our work against the EEMUA documentation and you will receive a detailed report, outlining the tank’s current condition and any recommendations for repair or maintenance. 

Interested in our tank inspection service? Learn more

Responsive testing that delivers assurance that your equipment is safe.

Contact us for a quality testing service with a fast report turnaround. We can respond to any challenge.


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