R-Stamp Certification

Loenbro is R-Stamp certified by the National Board of Boiler and Pressure Vessel Inspectors and the American Society of Mechanical Engineers (ASME). Loenbro is one of the few R-Stamp certified companies in Montana, Wyoming and the Dakotas. We have undergone rigorous training and testing to gain the experience required to weld, repair and alter pressure vessels and conduct boiler tube repair and replacement.