JIS B 2220 2K Flanges are a common flange standard used in Japanese industrial applications. These flanges have a 2.0 MPa (approximately 290 psi) pressure rating and are available in sizes ranging from 50A (NPS 2 inches) to 450A (NPS 18 inches). They are intended to facilitate the connection of pipes and equipment while assuring leak-free connections. To ensure their quality and integrity, 2K Flanges are subjected to rigorous testing and inspection, including visual tests, dimensional verification, material testing, and non-destructive testing (NDT). These flanges are essential in piping systems, supplying dependable and long-lasting connections in various industrial settings.

Several different testing and inspection methods can be utilized to guarantee the quality and consistency of JIS B 2220 2K Forged Flanges . These procedures are used to evaluate the dimensional accuracy of the flanges, as well as the flanges' material qualities and structural integrity. The specific procedures for testing and inspection may change based on the application and the requirements, but some of the methods that are generally accepted include the following:

Visual Inspection: In this step of the inspection process, we perform a visual inspection of the flange to check for any obvious flaws, surface faults, or inconsistencies in its construction.

Inspection of Dimensions: The flange is subjected to a series of measurements to ascertain whether or not it satisfies the requirements provided in the JIS B 2220 standard concerning its dimensions and tolerances.

Material Testing: The Material Flange materials can be tested through various tests, including chemical composition analysis, testing their mechanical qualities (such as tensile strength and yield strength), and testing of their hardness.

Non-Destructive Testing (NDT):

• Testing with a Liquid Penetrant (also known as PT): This technique is used to identify surface flaws such as cracks and discontinuities by first applying a liquid penetrant and then analyzing how it reacts to flaws in the material.
• Magnetic Particle Testing (MT): MT is utilized to identify surface and near-surface flaws in magnetic materials by applying magnetic particles and observing their accumulation at defect sites. Applying magnetic particles and observing their accumulation at defect locations constitutes MT.
• Ultrasonic Testing (UT): UT employs high-frequency sound waves to detect internal flaws or anomalies in the flange. UT reveals valuable information regarding the structural integrity of the flange.
• Radiographic Testing (RT): RT inspects the interior structure of the flange and identifies problems that are not evident on the surface by using X-rays or gamma rays to examine the flange.

Pressure Testing: Tests of Pressure It is possible to conduct pressure tests using hydrostatic or pneumatic pressure to determine whether the flange can withstand the specified pressure without leaking or deforming.

Leak Testing: Leak Testing entails pressurizing the flange to a certain level, then utilizing an appropriate leak detection technology to check for and identify any leaks that may have occurred.

Ultrasonic Thickness Measurement: Ultrasound Ultrasonic instruments can measure the flange material's thickness, assuring that it complies with the specified thickness criteria.

Surface Finish Inspection: Inspection of the Surface Finish The flange's surface finish is inspected to make sure that it satisfies the specifications that have been established.

Inspection of Machining: When it comes to machined flanges, both the machining quality and the accuracy of the dimensions are subjected to inspection.

Marking and Identification Verification: The marking and identifying Flanges are checked to ensure they have the appropriate markings and identifications following the JIS B 2220 standard.

When carrying out these kinds of inspections and testing, it is necessary to adhere to the criteria that are outlined in the standard JIS B 2220, as well as any other industry standards that may be relevant. In addition, using experienced individuals and conducting tests at facilities that have been accredited is necessary to acquire accurate and dependable results. 

Check out Wikipedia for more about flanges - https://en.wikipedia.org/wiki/Flange