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Chapter 1 General Provisions Article 1 This regulation is formulated to ensure the personal safety and health of those entering confined spaces and to eliminate the risks associated with working in such spaces. Article 2: The Safety Department is responsible for supervising and inspecting the implementation of this system. Chapter 2: Management Requirements Article 3: To enter a confined space for work, it is necessary to obtain a \"Permit for Entering a Confined Space.\" The procedure for obtaining this permit is as follows: (1) Entering a confined space for work should only be considered when no other practical methods are available to complete the task ； (II) The construction unit carrying out work in a confined space shall submit an application; safety managers are responsible for issuing the “Permit for Work in Confined Spaces” ； (III) Appoint a supervisor; the supervisor, together with the operating department, shall inspect the safety measures, protective facilities, as well as emergency alarm, communication, and rescue facilities, and sign to confirm their compliance once they are found to be satisfactory ； (IV) Before entering a confined space for work, a work safety analysis should be conducted to identify hazard factors, assess potential risks, and take measures to control those risks ； (5) After thoroughly reviewing the above contents and confirming there are no errors, the person in charge of safety management must submit it to the Factory Production Office for approval before commencing any operations. Article 4 Comprehensive safety technical measures for working in confined spaces and identification of such spaces: (1) A safety work plan (such as an HSE work plan) and a rescue plan must be prepared before entering a confined space, and all necessary rescue equipment must be available ； (II) Before entering a confined space, all personnel involved in work within such spaces should receive training ； (III) When performing work in confined spaces, relevant documents such as work permits, safety plans, emergency response plans, and continuous monitoring records must be kept on site ； (IV) Each device or work area must be identified to determine the number and locations of confined spaces. A list of confined spaces should be created and updated as necessary in light of changes in the working environment or process equipment ； (5) A safety work plan (such as an HSE work plan) should be prepared in advance for each identified confined space ； (VI) For confined spaces that are opened using keys or tools or that have physical obstacles, warning signs should be placed near the entry point when they are opened ； (7) Fixed warning signs shall be installed in confined spaces that can be entered with the use of tools or keys, or where there are no physical obstacles preventing entry ； (8) All warning signs shall include words reminding of the presence of danger and that entry is permitted only with authorization. Article 5 Preparations to be made before entering a confined space (1) Documentation section: Work permit, Permit for working in a confined space, Confined space rescue plan, Confined space entry inspection form, List of confined space supervisors/entrants, Minutes of the meeting prior to entering the confined space, Appropriate Material Safety Data Sheets ； (II) Prepare written entry plans and rescue plans for confined spaces. (1) There must be an accurate identification of the space, including any toxic or harmful gases present as well as its internal structure ； (2) Detailed procedures for alarm reporting and information communication are provided ； (3) Specify the placement location of equipment intended for rescue near the entry point ； (4) Before entry, a copy of the rescue plan must be handed over to the rescue team ； (5) Rescue methods should be developed based on the characteristics of the hazard and the specific risks it may pose ； (6) Rescue drills before entry. (III) Personnel Training (1) Confined Space Entry Plan and Rescue Plan ； (2) Accurate identification of confined spaces ； (3) Hazard identification in confined spaces ； (4) Basic first aid and mutual rescue knowledge ； (5) Fire safety knowledge and the use of protective measures (4) Isolation (1) An isolation list should be prepared in advance to isolate external sources of energy and materials ； (2) The connected auxiliary pipelines should be disconnected or isolated with blind flanges, and the relevant equipment should be mechanically and electrically isolated and tagged ； (3) The isolation measures shall be verified item by item in accordance with the list, and attached as an appendix to the permit. (5) Before entering a confined space, it should be cleaned and sanitized. Methods for cleaning and sanitizing confined spaces include, but are not limited to: emptying, cleaning (such as flushing, washing, etc.), neutralizing hazardous substances, and displacement ； (VI) Requirements for gas detection: (1) Where there is a possibility of oxygen deficiency, oxygen excess, toxic or harmful gases, flammable or explosive gases, dust, etc., gas detection should be carried out in advance, with the detection time and results recorded ； (2) If the work is interrupted, gas testing must be conducted again before re-entering ； (3) During entry into confined spaces, when the gas environment may change, gas monitoring should be carried out, such as during welding operations, drilling operations, dredging operations, etc ； (4) For gas monitoring, continuous monitoring should be preferred; if intermittent monitoring is used, the interval should not exceed 2 hours ； (5) The continuous monitoring instrument should be installed near the working area, in a location where it can be easily seen or heard by supervisors and workers ； (6) The inspection shall be conducted by trained and qualified personnel. The testing instruments should be within the valid period of calibration ； (7) Sampling should be representative, with special attention paid to areas where personnel may work ； (8) The sampling points should include the top, middle, and bottom of the confined space ； (9) Any gas purging should be stopped during sampling ； (10) The testing sequence is oxygen content, flammable and explosive gases, and toxic and harmful gases. (VII) Testing standards for gas detection (1) The oxygen concentration both inside and outside confined spaces should be the same. If there is a discrepancy, the cause of the deviation should be determined before granting access to the confined space ； (2) The oxygen concentration should be maintained at 19.5%~23.5% ； (3) The concentration of toxic and harmful substances in confined spaces shall not exceed the limit specified as the \"maximum allowable concentration of toxic substances in workshop air\" according to **(or the local regulations). If any item fails the inspection, entry shall be prohibited or work must be stopped immediately. Article 6 Protective measures for persons entering confined spaces (1) When conducting an initial gas test in a confined space or when the concentration of toxic and harmful gases in the space is unknown, those who enter must wear a positive-pressure respirator or a long-tube respirator ； (II) When working in confined spaces, a dedicated supervisor must be assigned; work must not be carried out without such supervision ； (III) The supervisor must pull the life rope once every 2 minutes and check the condition of the person who has entered. In the event of an anomaly, the person who has entered must be pulled out immediately. Entering the rescue area without protection is strictly prohibited ； (IV) Natural ventilation is permissible; where necessary, forced ventilation should be used. The introduction of pure oxygen into confined spaces is strictly prohibited ； (5) Ventilation during entry cannot replace the purging done before entry ； (VI) The forced ventilation equipment must operate continuously and effectively; in the event of any malfunction, it should stop operating immediately ； (7) The temperature in confined spaces should be controlled so as not to pose a hazard to personnel ； (8) Sufficient lighting; the lighting fixtures shall meet explosion-proof requirements ； (IX) Pay special attention to the work area (including residues, materials used in work, or equipment) and the paths leading to it, and designate safety measures to prevent falls or slips ； (10) Equipment in confined spaces that hinders personnel movement, poses a risk to workers, and interferes with rescue efforts (such as mixers) should be secured, and removed if necessary ； (11) Necessary and appropriate personal protective equipment. Article 7 Emergency rescue measures for entering confined spaces (1) In emergency situations, rescue actions shall be carried out in the following order of priority: the person inside shall attempt to save themselves first, rescuers should provide assistance from outside the confined space, and then rescuers shall enter the confined space to rescue the person inside ； (II) A written rescue plan should be established, and simulated rescue drills should be conducted annually; all relevant personnel must be familiar with the rescue plan ； (III) All authorized operators must wear safety belts and life jackets. Article 8 of the Supplementary Provisions in Chapter 3: In the event that these provisions are inconsistent with **laws, regulations, and relevant rules, the provisions of higher-level authorities shall prevail. Article 9: This regulation shall be interpreted by the Safety Department. Article 10 This system shall come into effect as of the date of issuance.