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I. Introduction: Global Tube & HVAC Industry Transformation The global tube and welding industry is entering a decisive stage of transformation. For decades, copper pipes dominated HVAC systems due to their conductivity and workability. Yet the challenges of rising raw material costs, volatile global supply chains, and increasing environmental regulations have forced manufacturers to look for smarter and greener alternatives.

I. Industry Background and Development Trends In recent years, the global air conditioning and refrigeration industry has been undergoing a profound material transformation. For decades, copper tubes have been widely used in HVAC systems due to their good thermal conductivity and ease of processing.