Abstract:To address the challenges of product diversification and cost control in permanent prefabricated beam plants, a flexible production line optimization strategy characterized by “upward compatibility and downward modification” based on the existing equipment is proposed. By re-engineering the steam curing and tensioning processes, an automated production system that balances efficiency and energy consumption is established. The results demonstrate that adopting the energy-saving steam curing modes (energy-saving I and II) can reduce the beam curing cost of single beam by 21% and 40.7%, respectively, and its energy-saving II can save a cumulative cost of 2.514 million yuan over five years. The secondary tensioning process combined with low-temperature steam curing can effectively enhance the production efficiency and ensure the structural safety, which provides a viable technical pathway and economic reference for the flexible and low-carbon production of beam plants.