# Fermentation Heating Tube Anti-Corrosion Energy Conservation, Consumption Reduction & Economic Benefit Evaluation Specification ## Preface This specification is an extended supporting document of the full anti-corrosion management system from Doc.33 to Doc.121. It establishes unified statistical calibers, benefit calculation rules, periodic evaluation mechanisms and optimization guidance standards for energy consumption, consumable input, equipment maintenance expenditure and production loss control generated in the whole process of heating tube anti-corrosion operation. It changes the single safety-oriented management mode of anti-corrosion work, combines equipment protection with lean cost control, quantifies the economic value of standardized anti-corrosion management, and provides data support for scheme optimization, reward evaluation and system annual review. ## 1. Statistical Scope & Unified Accounting Standards of Anti-Corrosion Cost All cost items related to heating tube anti-corrosion protection are divided into four major accounting categories with unified statistical rules: 1. Consumable material cost: acid-base cleaning agents, biocides, sealing gaskets, filter elements, anti-corrosion isolation accessories, calibration standard reagents and disposable protective supplies consumed in pickling, passivation, pipeline cleaning and daily maintenance. 2. Equipment maintenance & replacement cost: labor expense of disassembly, inspection and overhaul, third-party testing fees, spare parts procurement cost of failed heating tubes and auxiliary pipelines, instrument probe replacement expenditure. 3. Energy consumption cost: electricity consumed by medium circulation pumps, heating equipment, waste liquid treatment devices and ventilation dehumidification facilities during CIP flushing, static standby circulation, high-flow scouring and seasonal anti-corrosion operation, as well as steam and pure water consumption. 4. Hidden loss cost: batch fermentation yield reduction, raw material scrapping, production line downtime loss caused by heating tube leakage, medium cross-contamination and forced shutdown maintenance, together with environmental governance expense of corrosive waste liquid disposal. All costs are calculated by workshop, production line and equipment serial number monthly, and abnormal loss items shall be marked with fault cause labels to facilitate subsequent cost tracing and attribution analysis. ## 2. Graded Economic Benefit Evaluation Cycle & Evaluation Indicators Three periodic evaluation mechanisms are formulated to match the existing management audit rhythm: 1. Monthly lean cost analysis: focus on the fluctuation of consumable consumption, energy per unit output and routine maintenance cost, compare with the historical baseline value of the same workshop, locate abnormal overspending caused by non-standard operation, excessive reagent dosage and frequent equipment failure. 2. Quarterly benefit comprehensive evaluation: combine heating tube failure frequency, equipment average service life, downtime loss rate and third-party testing data, calculate the comprehensive anti-corrosion input-output ratio of each production line, and carry out cross-workshop benchmarking ranking in accordance with the incentive rules of Doc.106. 3. Annual total benefit assessment: take the whole factory as the statistical unit, compare the annual total anti-corrosion cost, equipment replacement quantity and production hidden loss with the baseline data before the implementation of the anti-corrosion system, quantify the total economic benefits brought by standardized management, and form a special benefit evaluation report as the core attachment of the annual system review document in Doc.120. Core evaluation indicators include: average service life of heating tubes, unit fermentation output anti-corrosion comprehensive cost, cleaning agent consumption per batch, downtime loss rate caused by corrosion failure, qualified rate of one-time medium switching cleaning, and comprehensive energy consumption of anti-corrosion operation. ## 3. Cost Abnormal Traceability & Targeted Optimization Measures Once the monthly anti-corrosion cost exceeds the early warning threshold or rises year-on-year significantly, the equipment department shall launch a closed-loop traceability analysis within 5 working days: - If the overspending originates from irregular operation such as excessive pickling time, repeated invalid flushing and arbitrary high reagent concentration, rectification shall be implemented by strengthening on-site patrol supervision and post standardized retraining; - If it is caused by frequent equipment corrosion damage and frequent spare parts replacement, optimize pipeline layout, material matching scheme and static standby protection strategy, and add enhanced inspection links for high-risk equipment; - If the overspending comes from unreasonable energy control such as long-term idle large-flow circulation and untimely shutdown of auxiliary equipment, adjust the low-flow and static standby operation clauses in Doc.116 to formulate energy-saving anti-corrosion execution standards. For optimization schemes verified to reduce comprehensive anti-corrosion costs, relevant improvement materials shall be sorted and included in the enterprise anti-corrosion knowledge base in accordance with Doc.121, and mature schemes shall be promoted factory-wide after pilot verification. ## 4. Benefit Data Application in Incentive, Procurement & System Optimization The quantified economic benefit data serves as an important objective basis for multiple management links: 1. As the core evaluation index of anti-corrosion performance appraisal and innovation incentive in Doc.106, teams and individuals who achieve significant cost reduction and failure rate decline can apply for special economic rewards; 2. Guide the warehouse to optimize the safety stock of anti-corrosion spare parts and chemical reagents, adjust the procurement batch and supplier selection according to the consumption law of each workshop, avoid overstock occupation of funds or shortage leading to production shutdown risks; 3. Provide data evidence for document dynamic revision in Doc.120, appropriately adjust cleaning cycles, patrol frequencies and equipment scrapping thresholds to balance anti-corrosion safety risk and lean management cost, and avoid excessive protection leading to unnecessary resource waste. ## 5. Energy-Saving Anti-Corrosion Optimization Management Requirements On the premise of not reducing anti-corrosion safety standards, all workshops shall carry out energy-saving transformation and process optimization: reasonably set circulation flow and flushing duration according to medium characteristics, adopt gradient temperature control to reduce steam and electricity consumption, optimize the waste liquid centralized treatment process to improve reagent recycling efficiency, and regularly eliminate high-energy-consuming aging pumps and heat exchange auxiliary equipment. All energy-saving improvement projects need to record pre-implementation and post-implementation consumption data to verify actual benefit gains. ## 6. Archive Management of Economic Benefit Evaluation Materials Monthly cost statistical sheets, quarterly cross-workshop benefit benchmarking reports, annual comprehensive input-output evaluation documents, cost abnormal traceability analysis records and energy-saving optimization benefit verification data shall be archived in dual electronic and paper forms as confidential management files in accordance with Doc.108. All economic operation data shall be retained for the full lifecycle of the anti-corrosion system, providing long-term decision-making support for equipment investment, process upgrading and lean factory management. This specification constructs a cost-benefit balance management dimension for the fermentation heating tube anti-corrosion system, realizes the organic integration of equipment safety protection and enterprise lean operation, maximizes the economic value of the full-set standardized anti-corrosion management system, and further improves the multi-dimensional closed-loop management system covering safety, quality, technology, personnel and cost.
