Leak detection is a method where leak detectors are used to check the existence of a leak in a given commodity. The technique involves sealing of containers to detect any form of leakage. There are several detection methods, which are classified, as internal, or external. However, the technique used depends on where the leak detection equipment is placed.
Leaks are known to be the last effects after corrosion. The deteriorated container tends to break, exposing the contents in the container. Luckily, with the help of the sophisticated technology of leak detection equipments, corrosion is discovered before it gets to a level of exposing the materials. The detection method incorporated depends on the type of element used. There are four commonly used methods of Leak detection types (LDS)
Methods of Leak Detection System
The incorporation of leak detection equipments depends on the type of materials to be tested more so on the detection method and the detection mechanism used. The methods include:
1. Pressure Method
Pressure is an important element in a sealed container. For this reason, Leak detection equipments greatly depend on the available pressure in the sealed containers. A pressure drop or an increase in a vacuum chamber indicates that there are high chances of a leakage in a given container. Application of high pressure in the containers can make the leak to be more noticeable. Additionally, coating the outside of a tin with soapy water makes the detection noticeable since bubbles will be formed on the leaked areas.
2. Chemical Detection Method
Majority of leak detection mechanism involves the detection of elements such as hydrogen, radioisotopes, or helium. The elements are added in the system and detected externally using a suitable method. In addition, gases can also be used-the method is known as gas sniffing. Gas sniffing involves the use of helium detectors whereby the equipment is capable of sensing or sniffing out the presence of helium on the containers. Helium detection is the most used method in leak detection due its effectiveness and ease of functionality. Further, Helium detectors functionality is enhanced due to the use of mass spectrometry it incorporates.
3. Acoustic Methods
This method uses acoustic vibration waves. The waves are capable of propagating high-pressure gasses and fluid leaks. However, this method requires the technicalities of an ultrasonic microphone. The highly sensitive microphone is able to pick up the loudest of the noise emanating from the acoustic vibration waves. Additionally, for efficient and more accurate result, acoustic method in conjunction with other methods offers incredible results.
4. Dry penetration method
Dry penetration is also known as penetrant testing (PT). It is a commonly used method used to locate and track surface breaking defects in metals, ceramics, or plastics. The general basis of this methodology lies in the chemistry of understanding surface tension. The penetrant is applied on ferrous and non-ferrous materials to detect forging or welding surface defects. The defects are usually as a result of leaks, hairline cracks, or surface porosity.
Advantages of Leak Detection in Food Packaging
Guarantee of food freshness to retailers and consumers is a key aspect in food packaging. For this reason, package leak detection is a competitive advantage to guarantee longer shelf life and an appealing presentation to the consumer. Below are several advantages of using leak detection equipment in packaging food products:
• Guarantees freshness to all users of the product
• Quality assurance in the documentation of food products makes it easy for consumers and retailers to purchase the products.
• Prevents needless returns, loss of prestige, and loss of consumers