Chapter 84 covers nuclear reactors, boilers, machinery, mechanical appliances and their parts, and is the largest chapter of industrial machinery in the HS classification, including power machinery, agricultural machinery, metalworking machine tools, office equipment, automatic data processing equipment, lifting and handling machinery, construction machinery, etc. This chapter emphasizes the function and use of machines rather than material properties, with the core being their power drive and mechanical motion characteristics. Heading 8474 includes: machines for sorting, screening, separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other solid (including powdered or paste) mineral substances; machines for agglomerating, shaping or moulding solid mineral fuels, ceramic pastes, unhardened cement, plastering materials or other powdered or paste mineral products; and machines for making sand moulds. The first 2 digits 84 = machinery, mechanical appliances and parts; digits 3-4, 74 = machines for processing earth, stone, ores and other solid mineral substances, including sorting, screening, separating, washing, crushing, grinding, mixing or kneading; digits 5-6, 32 = mixing or kneading machines. The full code 847432 refers to mixing or kneading machines for asphalt (a mineral bituminous material), commonly known as asphalt mixing plants. Asphalt mixing plants are used for heating, mixing and stirring asphalt, aggregates and other solid mineral substances, which conforms to the description in 8474 of 'mixing or kneading machines for earth, stone, ores or other solid mineral substances.' They are not classified under 8479 (other machinery not elsewhere specified) or 8429 (earth-moving machinery), because their core function is mixing and stirring rather than excavating or compacting.

Product Name: The specific name of the declared commodity, which should accurately reflect the machine's function, such as 'asphalt mixing plant' or 'asphalt mixture mixing equipment.' Use: Explain the machine's application scenario, such as 'used for asphalt mixture production in highway construction' or 'used for asphalt pavement construction.' Working Principle: Briefly describe the machine's mixing and stirring method, such as 'forced intermittent mixing' or 'continuous drum mixing.' Brand: Fill in the machine's brand name, such as 'XCMG,' 'SANY,' 'Marini,' etc. Model: Fill in the specific model, such as 'LB3000' or 'QLB-2000.' Mixing Capacity: Expressed in tons/hour or cubic meters/hour, such as '240 tons/hour.' Mobile or Not: Indicate whether it has a mobile device, such as 'mobile' or 'stationary.' Brand Type: Such as 'foreign brand (OEM production),' 'domestic independent brand,' etc. Product Name: Asphalt Mixing Plant; Use: Used for asphalt mixture production in highway construction; Working Principle: Forced intermittent mixing; Brand: XCMG; Model: LB3000; Mixing Capacity: 240 tons/hour; Mobile or Not: Stationary; Brand Type: Domestic independent brand. Incorrectly classifying asphalt mixing plants under 8479 (other machinery), ignoring their mixing and stirring function. Incomplete declaration elements, such as missing key information like working principle and mixing capacity. Confusing 'asphalt mixing plant' with 'asphalt paver,' the latter belonging to 8479 or 8429.

Core classification basis: Heading 8474 explicitly includes 'mixing or kneading machines for earth, stone, ores or other solid mineral substances.' Asphalt mixing plants are used for mixing and stirring asphalt, aggregates and other solid mineral substances, conforming to this description. Meanwhile, according to the chapter notes to Chapter 84, machines are classified by function, not by industry of use. Therefore, even if used in highway construction, they are not classified under 8429 or 8479. 847910 Other machinery not elsewhere specified: 8479 is a residual heading, applicable only when the machine is not named in other headings of Chapter 84. Asphalt mixing plants are already named in 8474, so they are not classified under 8479. 842940 Compacting machinery: 8429 includes compacting machinery such as road rollers, used for compacting pavement rather than mixing and stirring. The function of an asphalt mixing plant is mixing, so it is not classified under 8429. 847431 Concrete or mortar mixing machines: 847431 specifically refers to concrete or mortar mixing machines. Asphalt mixing plants are used for asphalt mixtures, not concrete or mortar, so they are classified under 847432. 847439 Other mixing or kneading machines: 847439 covers other mixing or kneading machines under heading 8474. Asphalt mixing plants are specifically named in 847432, so they are not classified under 847439. 847480 Other machinery: 847480 includes agglomerating, shaping or moulding machines. Asphalt mixing plants do not involve shaping or moulding, only mixing and stirring, so they are classified under 847432. Is the machine used for mixing or kneading solid mineral substances? Is it specifically used for asphalt mixture production? Does it not belong to concrete or mortar mixing machines? Is it not more specifically named in other headings? Are the declaration elements complete and accurate?

What is the difference in HS codes between asphalt mixing plants and concrete mixers? Asphalt mixing plants are classified under 847432, and concrete mixers under 847431. Both are mixing machines, but they handle different materials: asphalt mixing plants handle asphalt mixtures, while concrete mixers handle concrete or mortar. Classification should be determined based on actual use and materials. Are mobile asphalt mixing plants classified under the same code? Yes, both mobile and stationary asphalt mixing plants are classified under 847432, because HS codes are mainly based on function rather than installation method. However, when declaring, it is necessary to indicate 'mobile' or 'stationary' for customs statistics and supervision. If an asphalt mixing plant has a heating device, does it affect classification? No. Heading 8474 includes mixing or kneading machines. The heating function is an auxiliary function and does not change its essential character. However, if the heating device constitutes a separate machine, it must be classified separately. How can I check the import tariff rate for 847432? You can check through the General Administration of Customs website, China International Trade Single Window, or professional query platforms by entering HS code 847432, selecting the country of origin and trade mode, to check the MFN rate, interim rate, etc. Note that tariff rates are subject to adjustment, and the latest published version shall prevail. How should 'mixing capacity' be filled in during declaration? Mixing capacity is usually expressed in tons/hour or cubic meters/hour, such as '240 tons/hour.' It should be filled in according to the machine's nameplate or technical manual to ensure consistency with the actual item. If uncertain, refer to parameters of similar equipment. Are there export controls on asphalt mixing plant exports? Generally, they are not export-controlled items, but if they involve dual-use items or specific countries or regions, relevant regulations must be observed. It is recommended to check the Export Control Law of China and Ministry of Commerce announcements before export to ensure compliance. If the asphalt mixing plant is second-hand equipment, is the classification the same? The classification is the same, still under 847432. However, the import of second-hand equipment must comply with national regulations on the import of mechanical and electrical products, which may involve pre-shipment inspection, licenses, and other requirements. How are parts of asphalt mixing plants classified? Specialized parts, if declared separately, are generally classified under 8474.90. However, if the part itself is a commodity named in another heading (such as motors, pumps), it is classified under the corresponding heading. Judgment should be based on the characteristics of the part.