What is a Leak?

Leaks are undesirable flows of liquid or gas that come through the wall of a vessel through an imperfection or defect such as a hole, crack, or bad seal. A leak needs a difference in pressure to generate the flow; they always flow from higher pressure to lower pressure.

Generally, leaks are thought of as traveling from positive pressure (inside an object) to atmospheric pressure (outside an object), though it is not always the case, as a leak could be from atmosphere to inside an evacuated object. It does help, though, to think about it in this way because the units and terminology are based on this model.

What is Leak or Pressure Testing?

Leak testing is a form of non-destructive quality control testing that tests manufactured parts to make sure fluids can’t leak into or out of the part. There are several different types of leak testing technologies: Air Decay, Differential Air Decay, and Differential Mass Flow. 

The purpose of leak testing is precisely to verify the good and bad parts, thus preventing and solving quality issues. The immediate detection of any defective part during preliminary quality lab processes can improve the reliability of production processes, avoiding waste, claims, or the compromise of the quality of the final product.

It is also a matter of safety. Testing components meant to contain a gas or a fluid allows the prevention of material leakage loss, explosion, and environmental contamination or nuisances caused by accidental leakage.

Why is Leak Testing important?

Among a wide range of applications, the leak testing procedure is also a lot more efficient compared to other traditional process control systems while offering more accurate results:

  • It guarantees compliance with the required quality criteria in both R&D, production and Quality Control processes
  • It does not require a big investment and it is easy to perform
  • It is fast, accurate, and clean, the equipment is compact and can be placed close to the product under test
  • It is suitable for almost every manufacturing industry
  • It can be performed manually by an operator or automatically by a PLC
  • A dedicated software manager can both collect and manage all the test data

Since there are multiple methods for performing leak testing, defining the most appropriate test procedure depends on the area of application and specified by a variety of requirements: test pressure, reject leak rate, size of the component, as well as factors like production rate and manufacturing environment.

How can SEE solve your leak and/or pressure testing needs?

SEE Engineering has developed extremely precise solutions that satisfy the ever more stringent requirements of industrial sectors and to cover the large range of possible leaks.

As leak detection is most often an additional step in the production process, which can add cost, it is important to work with a company that has the experience and willingness to work with a customer in a partnership, finding a test method that allows for the right ratio between equipment cost and productivity.

For any of your inquiries, do not hesitate to contact us at any time.