GreenWood has completed a recertification for The National Board of Boiler and Pressure Vessel Inspectors (NBBI) R symbol stamp for the repair and/or alteration of boilers, pressure vessels, and other pressure-retaining items. With this certification, only qualified and certified fabricators will perform alterations and repairs. The R stamp is available only to companies who have successfully completed rigorous weld joint testing and whose QC system covers repairs according to established guidelines. We are proud to have the R stamp certification and affiliation with the NBBI as an ongoing credential of our team’s capabilities.