The Boiler Unit has a listing of authorized “R” stamp holder companies (Tennessee Licensed Repair Companies) which are approved to make repairs, erections and/or alterations to vessels in Tennessee; this list is located on the Boiler Unit website at: https://www.tn.gov/workforce/employers/safety---health/regulations-compliance/regulations---compliance-redirect/boiler-unit.html Annual renewal is required prior to June 30th of each year.
Tennessee Department of Labor/Workplace Regulations and Compliance/Boilers