Winter anti-freezing, anti-condensation and insulation measures plan

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Winter anti-freezing, anti-condensation, and thermal insulation measures Plan 1. Purpose: This plan is formulated to ensure the safe and stable operation of equipment during winter, thereby preventing any unnecessary losses or accidents caused by weather conditions. 2. General requirements for anti-freezing, anti-condensation, and insulation measures In line with the principles of comprehensiveness, thoroughness, and practicality, the general requirements and responsibility allocations for anti-freezing, anti-condensation, and insulation work are as follows: 2.1 Identify the primary person responsible for these tasks, who shall be in charge of carrying out and implementing anti-freezing, anti-condensation, and insulation measures for all production units, facilities, and equipment within their jurisdiction ； The responsibilities for equipment and facilities within the area designated for anti-freezing, anti-condensation, and insulation measures must be clearly defined, with the routine tasks related to these measures being included as an important part of the handover procedures during winter production shifts ； 2.2 Based on the actual circumstances, preparations should be made in advance, and detailed and reliable anti-freezing, anti-condensation, and insulation measures should be established. All aspects should be taken into consideration to ensure comprehensive protection with no gaps, as well as thorough maintenance and inspections ； 2.3 Check that the insulation protection of production units, facilities, equipment, as well as instruments and control systems within the respective area is in good condition; any deficiencies or damages should be repaired promptly ； 2.4 Strengthen training for operators on anti-freezing and anti-condensation measures, ensuring that everyone is familiar with the key areas that require such protection in their respective positions and that everyone knows how to implement these anti-freezing and anti-condensation measures. 2.5 Strengthen the regular inspections of anti-freezing, anti-condensation, and insulation points. In the winter freeze prevention efforts, each pipeline and piece of equipment must be assigned to a responsible person for oversight. No corner should be overlooked, ensuring that freeze prevention, anti-condensation measures, and thermal insulation are all properly implemented. The principle of preventing freezing overnight must be strictly adhered to. 3. Key areas for anti-freezing, anti-condensation, and heat preservation 3.1 Utility and auxiliary systems: The main inlet and outlet pipes for steam at various pressures, process water, circulating cooling water, fire protection water, domestic water, instrument air, and condensate recovery shall be properly organized according to the pipeline network layout, with enhanced winter inspections and maintenance carried out ； 3.2 Process system: ① Low points of various towers, tanks, pumps, and pipelines ； ②Inlet and outlet lines for machine pump cooling water, as well as drain lines in various plant areas ； ③Inlet and outlet pipelines and bypass lines of each circulating water cooler ； ④Each steam tracing line and its return line ； ⑤Insulation of various process pipelines and equipment ； ⑥Heating coils inside/outside of each equipment unit ； 3.3 Equipment Systems ① Lubricating oil and cooling water systems for large-scale mechanical equipment ； ②Equipment for variable-power supply systems ； ③On-site instruments and control systems ； ④Atmospheric pressure equipment, pressure-bearing equipment, special equipment ； 3.4 Main system components: steam systems, water piping systems, compressed air systems, fire water systems, fan units, air compressor units, pump station units, etc., belonging to various units ； 4. Specific requirements for freeze prevention, anti-condensation, and thermal insulation
4.1 It is necessary to determine and implement the key areas requiring freeze prevention, anti-condensation, and thermal insulation during winter, as well as specific measures for such purposes. Inspections related to freeze prevention, anti-condensation, and thermal insulation should be intensified; in particular, inspection efforts must be stepped up during extreme weather conditions ； 4.2 For rotating equipment and large-scale units, increase the frequency of routine inspections and shaft turning; the shaft should be turned slowly to prevent freezing and breakage of the shaft. The lubricating oil must be free of water, the cooling pipelines must be in good condition, and the water supply lines must remain unobstructed ； The heat tracing and shaft seals of the cold pump must remain unobstructed to prevent freezing from affecting the valve’s movement; steam preheating measures should be used ； 4.3 High vigilance must be maintained regarding potential failures in utility systems such as instrument air, nitrogen, and circulating water (in small pipelines), which could affect safe production and the continuous, stable operation of the facility; inspections of the equipment and pipeline networks in the plant area should be intensified ； 4.4 For instruments and equipment both indoors and outdoors, it is necessary to regularly check the temperature, pressure, flow rate, liquid level, and the operating status of the automatic control systems. It is important to ensure that they are not frozen, that they function properly, and to prevent errors in operation; any issues detected should be addressed promptly through maintenance ； 4.5 Frozen pipes, valves, etc. must not be heated rapidly; they should only be thawed slowly using warm water or a small amount of steam, to prevent damage caused by sudden heating ； 4.6 In case of any frozen and blocked equipment, pipes, valves, etc., they must be reported promptly; the points of blockage should be identified and proper measures taken for resolution ； 4.7 Equipment and pipelines that are temporarily shut down during winter must be properly protected to prevent leaks or other issues, ensuring that the equipment and facilities can survive the winter safely ； Deactivated equipment, steam pipelines, and control valves must be equipped with anti-freezing measures; in particular, water accumulated in steam valves that are not in use should be drained completely ； 4.8 In winter, in the event of a large-scale shutdown of the equipment, all heating devices and pipeline heat tracing systems, as well as all steam supplies, should continue to supply a small amount of steam. Similarly, all coolers and cold water systems should also continue to flow water in small amounts, in order to keep the pipelines unobstructed and prevent them from freezing.