What is the meaning of U stamp?

The "U Stamp" refers to a certification mark used in the United States to indicate that a product or material conforms to the standards set by the American Society of Mechanical Engineers (ASME) for nuclear components. It signifies that the item has been designed, fabricated, and inspected in accordance with stringent quality standards for safety and reliability in nuclear applications. This stamp is crucial for ensuring compliance with regulatory requirements in the nuclear industry.