Chapter 85 covers electric motors, electrical equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories thereof. This chapter is the most concentrated chapter of technology-intensive products in the HS classification, involving power generation, transformation, consumption, communications, electronic components, and other fields. Products within the chapter generally have electrical or electronic functions, but certain specific electrical products (such as mechanical apparatus of Chapter 84) are excluded. Heading 8515 covers machines and apparatus for welding, brazing, cutting, or surface treatment using electric power, laser, ultrasonic, electron beam, magnetic pulse, plasma arc, or other energy, as well as machines and apparatus for thermal spraying. It also includes various welding equipment such as arc welding, resistance welding, and laser welding. This heading includes not only complete machines but also their dedicated parts, provided that the parts must be solely or principally used with machines under 8515. Code 851590 is a six-digit subheading. The first 2 digits "85" represent Chapter 85 (electric motors, electrical equipment and parts thereof). Digits 3-4 "15" represent heading 8515 (machines and apparatus for welding, brazing, cutting; thermal spraying equipment). Digits 5-6 "90" represent subheading 851590, i.e., parts of the aforementioned machines. Note: under 8515 there are also subheadings 851511 to 851580, corresponding to complete machines of different welding types (such as brazing, resistance welding, arc welding, etc.), while 851590 is specifically for parts of these machines. Therefore, this code applies only to parts solely or principally used with machines under 8515, and cannot be used for parts of other machines. The goods are parts of welding equipment and must be solely or principally used with machines for welding, brazing, cutting, or surface treatment under 8515. If the part itself is a general-purpose electrical part (such as a switch or relay), it should be classified under its corresponding heading; if the part is used with other machines (such as machine tools), it should be classified under other headings. Therefore, 851590 is a subheading specifically set for parts of 8515 machines to ensure accurate classification.

Product Name: The specific name of the declared commodity, which should accurately reflect the function, material, and use of the part, such as "contact tip for arc welding machine". Use: State what kind of welding, brazing, cutting, or surface treatment machine the part is solely or principally used with, such as "for arc welding machine". Material: The main material of the declared part, such as copper, steel, ceramics, etc., which affects classification and tax rate. Brand: Fill in the brand of the part (if no brand, fill in "no brand"), used for customs intellectual property protection. Model: Fill in the model or specification of the part to facilitate customs identification and classification. Working Principle: Briefly explain the functional principle of the part in the welding equipment, such as "conducts current to generate an arc". Whether Dedicated Part: Declare whether the part is solely used with machines under 8515, such as "Yes, solely used with arc welding machine". Product Name: Contact tip for arc welding machine; Use: Solely used with arc welding machine, conducts welding current; Material: Copper alloy; Brand: No brand; Model: CT-200; Working Principle: Conducts current to the welding wire through the contact tip to generate an arc; Whether Dedicated Part: Yes. Mistakenly classifying general-purpose electrical parts (such as switches, relays) under 851590, when they should actually be classified under headings such as 8536. Failure to specify that the part is solely used with 8515 machines, resulting in classification under other headings (such as 8466 machine tool parts). Material declaration is not specific, such as writing only "metal", which may affect classification and tax rate. Mistakenly classifying welding equipment accessories (such as welding tongs) under 851590, but welding tongs may belong to complete machines or parts of 8515, requiring specific analysis.

The core criteria for classification are: 1. Whether the part is solely or principally used with machines under 8515; 2. Whether the part is a general-purpose part (e.g., general-purpose electrical parts should be classified under 8536, etc.); 3. Whether the part constitutes a complete machine (if it constitutes a complete machine, it should be classified under the corresponding subheading of 8515). According to General Rules of Interpretation 1 and 6, 851590 applies only to parts solely used with 8515 machines and cannot be goods more specifically named in other headings. 851511 Brazing machines and apparatus: 851511 is a complete brazing machine, while 851590 is its parts. If a complete brazing machine is imported, it should be classified under 851511; if it is a part, it should be classified under 851590. 851521 Resistance welding machines and apparatus: 851521 is a complete resistance welding machine, and 851590 is its parts. The key distinction is whether it constitutes a complete machine. 851531 Arc welding machines and apparatus: 851531 is a complete arc welding machine, and 851590 is its parts. If parts and complete machines are imported together, they need to be classified separately. 853690 Other electrical apparatus for switching, protecting, or connecting circuits: If the welding equipment part is a general-purpose electrical connector (such as a terminal block), it should be classified under 853690, not 851590. 846693 Parts for machine tools: If the part is used with a machine tool (such as a laser cutting machine), but if the laser cutting machine belongs to 8456, the part is classified under 846693; if it belongs to the laser welding machine of 8515, the part is classified under 851590. Is the part solely used with machines under 8515? Is the part a general-purpose electrical part? Does the part constitute a complete machine? Is the part more specifically named in other headings? Is the part imported together with a complete machine?

Welding equipment parts are classified under 851590, but my part is general-purpose. Can it be classified there? No. 851590 applies only to parts solely or principally used with machines under 8515. If the part is a general-purpose electrical part (such as a switch, relay), it should be classified under its corresponding heading, such as 8536. How to determine whether a part is solely used with 8515 machines? It should be determined based on the design, function, use, and industry standards of the part. Generally, if the part can only be used with 8515 machines, or is principally used with such machines, it can be considered dedicated. If it can be used with multiple machines, it may be a general-purpose part. Should welding robot parts be classified under 851590? If the welding robot belongs to the welding machines under 8515, its dedicated parts can be classified under 851590. However, if the robot itself is classified under 8479 or other headings, the parts are classified under the corresponding heading. It needs to be determined based on the classification of the robot. How to query the import tax rate for 851590? Tax rates may change. It is recommended to query the latest tax rates through the official website of the General Administration of Customs, China International Trade Single Window, or consult a professional customs broker. Also pay attention to preferential tax rates under free trade agreements. What documents are required to declare 851590? Usually, contracts, invoices, packing lists, bills of lading, product manuals, part drawings, etc., are required to prove the specificity of the part. If necessary, provide a classification pre-ruling. If a part can be used both in welding equipment and other equipment, how should it be classified? According to the General Rules of Interpretation, if the part is principally used in welding equipment, it is classified under 851590; if it is principally used in other equipment, it is classified under other headings. It needs to be judged based on actual use. How to distinguish 851590 from other subheadings of 8515? Other subheadings of 8515 (such as 851511, 851521) are complete machines, while 851590 is parts. If a complete machine is imported, it should be classified under the corresponding complete machine subheading; if it is a part, it should be classified under 851590. How to determine the HS code for welding parts sold via cross-border e-commerce? First confirm whether the part is solely used with 8515 machines, then determine based on material, function, etc. It is recommended to use customs classification pre-ruling or consult a professional agency to avoid classification errors.