Boiler services and pressure vessels must be performed by an organization that is certified by a regional governing body. As governing bodies, these bodies are the National Board of Boiler & Pressure Vessel Inspectors (NBBI) and the American Society of Mechanical Engineers (ASME). Pressure vessels are constructed, repaired and altered according to standards established by these two (2) bodies.
The “U” stamp represents the “Fabrication of New Pressure Vessels”.
The “R” stamp represents the “Repairs & Alterations of Pressure Vessels”.
The “U” and “R” stamps signify IAM’s processes for the fabrication and repairs of ASME pressure vessels.