What is BS EN ISO 5817:2012?

BS EN ISO 5817:2012 is an international standard that provides guidelines for the quality of fusion-welded joints in steel, nickel, titanium, and their alloys. This standard sets the criteria for assessing the quality level of imperfections in these welded joints. It covers various welding processes such as arc welding, gas welding, electron beam welding, and laser beam welding.

Importance of BS EN ISO 5817:2012

Adhering to the guidelines outlined in BS EN ISO 5817:2012 is crucial for ensuring the structural integrity of welded components. Welding imperfections can compromise the strength, durability, and safety of welded joints. By following this standard, manufacturers can consistently produce high-quality welds that meet industry specifications and withstand demanding operational conditions.

Quality Classes

BS EN ISO 5817:2012 defines four quality classes for fusion-welded joints. Each class has specific requirements based on the size and location of imperfections within the weld. These classes are designated as follows:

Class A: The highest quality level with very stringent tolerances for imperfections.

Class B: Allows for slightly larger imperfections than Class A, but still maintains good quality.

Class C: Permits even larger imperfections, suitable for non-critical applications.

Class D: The lowest quality level with the least strict requirements for imperfections, typically used for non-structural purposes.

Using BS EN ISO 5817:2012

Implementing BS EN ISO 5817:2012 involves conducting visual inspections and non-destructive testing of welded joints to assess their quality levels. Visual inspections check for surface imperfections such as cracks, porosity, and lack of fusion. Non-destructive testing techniques, including ultrasonic testing and radiographic testing, are used to identify internal defects within the weld.

In conclusion, BS EN ISO 5817:2012 plays a crucial role in ensuring the quality of fusion-welded joints. By adhering to its guidelines, manufacturers can produce welds that meet industry standards, enhancing the durability and safety of welded components.