Name Change Reflects Campus Expansion, Unified National Brand and Continued Commitment to Arizona's Skilled Trades Workforce Tulsa Welding School, a leading provider of specialized career education, announces the Refrigeration School, Inc. (RSI), one of Arizona's most respected skilled trades training institutions, will change its name to Tulsa Welding School (TWS) in Arizona, effective July 20, 2026. This move is part of a strategic initiative to unify its campuses under a