Amendment 1 to the «Regulations on Safety Supervision of Boilers» (TSG G0001-2012)

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Amendment 1 to the \"Regulations on Safety Supervision of Boilers\" (TSG G0001-2012): 1.1 shall be revised to read as follows: Purpose \"These regulations are formulated in order to strengthen the safety supervision of boilers, prevent and reduce accidents, protect the lives and property of the public, and promote economic development, in accordance with the relevant provisions of the \"Law of the People’s Republic of China on the Safety of Special Equipment\" and the \"Regulations on Safety Supervision of Special Equipment\".\" ” II. Change 1.2 to: Scope of application \"These regulations apply to fixed (Note 1-1) pressure steam boilers, pressure hot water boilers, and organic heat carrier boilers as defined in the Catalogue of Special Equipment, as well as flue-type and flue-and-shell combined waste heat boilers whose primary purpose is the utilization of waste heat.\" ” III. Change 1.3 to: Scope of non-applicability \"These regulations do not apply to the following equipment: \"(1) Steam boilers with a normal design water volume of less than 30 L\" ； “(2) Steam boilers with a rated steam pressure of less than 0.1 MPa ； “(3) Hot water boilers with a rated outlet pressure of less than 0.1 MPa or a rated thermal power of less than 0.1 MW ； “(4) Organic heat carrier boilers with a rated thermal power of less than 0.1 MW ； “(5) Heat exchange devices to meet the cooling requirements of equipment and process flows. ” IV. Modify 1.4.3 to: Class C boilers “(1) Steam boilers, with p≤0.8MPa and V＞50L (V refers to the volume of water at the normal design water level; the same applies hereafter)” ； “(2) Hot water boilers, p＜3.8MPa, and t＜120℃ ； “(3) Gas-phase organic heat carrier boilers, 0.1MW≤Q≤0.7MW ； Liquid-phase organic heat carrier boilers, 0.1MW≤Q≤4.2MW. ” V. Modify 1.4.4 to: Class D boilers “(1) Steam boilers, p≤0.8MPa, and 30L≤V≤50L ； “(2) Hot water boilers powered solely by tap water pressure, with t≤95°C. ” Delete Notes 1-4. VI. Change 1.5 to the following: Imported boilers – Boilers manufactured abroad for use within China must meet the requirements of these regulations; if they do not comply with these requirements, technical evaluation and approval shall be carried out in accordance with the provisions of 1.6 of these regulations. ” VII. Amend Article 1.6 to read as follows: “When relevant entities utilize new materials, new processes, or new technologies (including the introduction of foreign technologies, manufacturing in accordance with foreign standards, or new structures) that are not in line with these regulations, or when such technologies are not required by these regulations but may have a significant impact on safety performance, they shall submit an application to the **General Administration of Quality Supervision, Inspection and Quarantine (hereinafter referred to as the **QAQI). The QAQI will entrust a safety technology consulting agency or a professional institution to conduct a technical evaluation; only after the evaluation results are approved by the QAQI may such technologies be used in production or operation.” ” VIII. Modify note 2-3 in Table 2-1 of 2.3.1 to read: “When other materials listed in GB 713 are used as boiler steel plates, the selection of their applicable scope may refer to the relevant provisions of GB 150 ‘Pressure Vessels’.” ” Add an item to Note 2-5 in Table 2-2 of 2.3.2: \"(3) Materials such as sulfuric acid dew point corrosion-resistant steel (09CrCuSb) whose operating conditions and technical requirements comply with GB/T 16507 \"Water-tube boilers\" and GB/T 16508 \"Shell-and-tube boilers\" can be used for the heating surfaces at the rear of boilers.\" ” 9. Modify Paragraph 1 of 3.3.2 to read: “The strength of the pressure-bearing components of the boiler itself can be calculated and verified in accordance with GB/T 16507.4 ‘Water-tube boilers – Part 4: Calculation of the strength of pressure-bearing components’ or GB/T 16508.3 ‘Shell boilers – Part 3: Design and strength calculation’.” When determining the strength of pressure components in boilers using experimental methods, comparable empirical design methods, or other design methods, the provisions of 1.6 of these regulations shall be followed. ” X. Modify paragraph 1 of 3.7.2 as follows: “For horizontal internal combustion boilers and cross-flow boilers with a rated working pressure not exceeding 2.5 MPa, where the smoke temperature in the operating environment is less than or equal to 600°C, T-joint butt joints may be used for connecting pressure-bearing components under the following conditions; lap joints are not permitted:” to read: “For horizontal internal combustion boilers, cross-flow boilers, and shell-type waste heat boilers with a rated working pressure not exceeding 2.5 MPa, in those areas where the smoke temperature is greater than 600°C and the components are directly exposed to flue gas, T-joints cannot be used. In other areas, T-joint butt joints may be used for connecting pressure-bearing components under the following conditions; lap joints are not permitted:” XI. Modify the content in the inspection method and percentage column under category A for fillet joints at pipe connections on the boiler drum and header, which is the last row of Table 4-1 in 4.5.4.6, to read: “For fillet joints with a full penetration structure and an outer diameter greater than 108 mm, 100% ultrasonic testing is required.” ； For other pipe fittings of the corner joint type, surface inspection shall be carried out on at least 20% of the total number of such joints……” Modify 4.5.4.6(2) to read: “The proportion and methods of non-destructive testing for hot water boilers of Class B and above shall comply with the requirements for steam boilers of the corresponding class in Table 4-1” ； For the circumferential butt joints and corner joints of the water heater headers, tubes, pipes, and other fittings of Class C, no non-destructive testing is required; however, 10% of the primary welds of other major pressure-bearing components shall be subjected to radiographic or ultrasonic testing ； ” XII. Modify Note 4-4 in 4.5.6.2.2 to read as follows: For components such as open-type header tanks, header tanks with tube joints that do not have rows of heating surface tubes, as well as those with tube joints whose inner holes are welded shut, start-up (steam-water) separators, pipes, water storage tanks, temperature reducers, and distribution headers, all of their welds must pass 100% non-destructive testing. Additionally, the butt-welded heating surface tubes and other pressure-bearing pipe fittings must have a root welding process using TIG welding and must also pass 100% non-destructive testing; this ensures the quality of the welds. In such cases, it is not necessary to conduct separate hydrostatic tests at the manufacturing site. The hydrostatic test pressure for components should be no less than the hydrostatic test pressure of the boiler body to which they correspond. ” 13. Modify 6.1.4(2) to read: “Steam boilers with a rated operating pressure of 0.1 MPa may be equipped with gravity-type safety valves or water-seal type safety devices; when hot water boilers are fitted with water-seal type safety devices, safety valves need not be installed.” ； The inner diameter of the water seal tube in the water-sealed safety device shall be determined based on the boiler’s rated evaporation capacity (rated thermal power) and rated operating pressure; it must be no less than 25 mm. No valves shall be installed, and anti-freezing measures shall be in place. ” 14. Modify 6.6.1(1) to read: “Steam boilers shall be equipped with high and low water level alarms (the high and low water level alarm signals shall be distinguishable from each other) as well as a low water level interlock protection device; the protection device shall activate at the latest when the water level reaches the lowest safe level” ； ” 15. Addition: 8.1.15 Regular self-inspections of boilers – “The user unit shall conduct at least one monthly inspection of the boilers in use each month, and shall keep records of these inspections.” The contents of monthly inspections mainly include checking whether the pressure-bearing components of the boiler, along with its safety accessories and instruments as well as interlock protection devices, are in good condition; whether the safety and energy-saving management systems for boiler operation are being effectively implemented; whether the certificates of the operators are valid; whether regular inspections are carried out as required; whether water (medium) quality is analyzed regularly; whether discharge adjustments are made based on changes in water and steam quality; whether the water seal pipes are blocked; and other abnormal conditions. ” 16. Modify 11.4.5.1(1) to read as follows: “In liquid-phase heat transfer systems and liquid-phase forced circulation throttling and depressurization vaporization systems, at least two electric circulation pumps and condensate supply pumps shall be installed; when one of these pumps stops operating, the total flow rate of the remaining circulation pumps or supply pumps shall be sufficient to meet the requirements of the system under its maximum load conditions” ； For electrically heated liquid organic heat carrier boilers with a thermal power of 0.3 MW or less, if their heat transfer system is equipped with effective temperature interlock protection devices, only one electric circulation pump needs to be installed ； ” 17. Change 12.1 to: Allowed range: Hot water boilers with a rated outlet temperature of less than 120°C and a rated operating pressure of not more than 0.7 MPa. ” 18. Change 12.3.2.3 to: Blasting test pressure \"When the rated outlet pressure of a hot water boiler is less than or equal to 0.4 MPa, the blasting pressure shall be greater than 4p + 0.2 MPa\" ； When the rated discharge pressure is greater than 0.4 MPa, the burst pressure should be greater than 5.25 p. ” 19. Amend Paragraph 2 of 12.3.3 to read: “The pressure for the overall verification hydrostatic test shall be 2p, and shall not be less than 0.6 MPa.” ” 20. Modify Table 12-1 in 12.4.4 to read: Table 12-1: Test Pressure and Holding Time. Name, Hydrostatic test pressure (MPa), Holding time at test pressure (minutes). Pressured castings: 2p, with a minimum of 0.4; Boilers as a whole: 1.5p, with a minimum of 0.4, 20 minutes. 21. Modify 13.1(1) and (2) to read: “(1) The pressure-bearing components of hot water boilers may be made of aluminum, copper alloys, or stainless steel; pipes may be welded pipes, and the selection of materials shall comply with the relevant standard specifications.” ； Other materials for boilers shall meet the requirements specified in Chapter 2 of these regulations ； “(2) The drum (shell) of the hot water boiler, the furnace chamber, as well as the connected end caps and tube sheets can adopt an inserted, fully penetrated T-shaped connection structure ； ” Change 13.1(5) to “Modifications to the boiler are prohibited.” ” Delete 13.1 (6). 22. Modify 13.2(2) to read: “For hot water boilers and steam boilers with a rated operating pressure of 0.1 MPa, non-destructive testing may be omitted provided that the boiler manufacturer guarantees the quality of the welds” ； ” Modify 13.2(3) to read: “The boiler manufacturer shall display safety warnings in a prominent position on the boiler” ； ” 23. Delete 13.3.2 and 13.3.3. 24. Modify 13.3.4 to read: “13.3.2 Connection between the drain pipe and the drain valve: The boiler drain pipe and the drain valve can be connected by threading.” ” 25. Modify 13.4 (1) and (2) to read: “(1) A boiler does not necessarily require a separate boiler room; the location where the steam boiler is installed should be effectively separated from non-operating personnel” ； “(2) No notification is required for the installation of the boiler, and no installation supervision inspection is carried out ； ” 26. Change 13.5 to: Regular inspections “Boiler users shall conduct regular self-inspections of the safety condition of their boilers.” ” 27. Change 13.6(1) to “Boilers do not require registration for use”” ； Change 13.6(4) to “Boiler operators do not need to obtain a ‘Special Equipment Operator Certificate’, but they must receive training in accordance with the provisions of 13.4(3) of these regulations.”