Chapter 73 covers articles of iron or steel, but excludes iron and steel smelting raw materials, mineral products, and basic iron and steel materials (such as plates and bars). This chapter includes iron and steel pipe fittings, structural components, containers, cables, nails, tools, etc. The core feature is that these articles already have a specific shape or function and are no longer simple rolled or cast primary iron and steel products. Heading 7310 covers iron or steel containers for compressed or liquefied gas, as well as iron or steel containers of a capacity not exceeding 300 liters (not for compressed or liquefied gas). It includes seamless or welded steel cylinders, tanks, drums, etc., but excludes containers specially designed for a particular type of machine, household utensils, and packing containers. The first 2 digits 73 = chapter on articles of iron or steel; digits 3-4, 10 = iron or steel containers for compressed or liquefied gas, or non-gas containers of a capacity not exceeding 300 liters; digits 5-6, 00 = subheading subdivision; currently there is no further subdivision under this heading, and all iron or steel containers meeting the description are classified under 731010. Note: containers with a capacity exceeding 300 liters are classified under 7311, while 7310 applies only to those not exceeding 300 liters or for compressed/liquefied gas. This commodity is an iron or steel container used for holding compressed or liquefied gas, or has a capacity not exceeding 300 liters, meeting the description of 7310. If the capacity exceeds 300 liters, it should be classified under 7311; if it is a household utensil, under 7321, etc.; if it is a packing container, it may be classified under 7310 but must be distinguished. Therefore, the core determining factors are material, use, and capacity.

Product Name: The standard name of the declared commodity, which should accurately reflect the material and use, such as "seamless steel gas cylinder". Material: Specific type of iron or steel, such as "stainless steel" or "carbon steel", and indicate the grade (such as 304). Use: The medium contained and the usage scenario, such as "for containing compressed oxygen, used for industrial welding". Capacity: The volume of the container, in liters (L), used to determine whether it is not exceeding 300 liters. Brand: The manufacturer or brand name; if there is no brand, fill in "none". Model: The product model or specification, such as "WMA219-40-15". Processing Method: Explain the container manufacturing process, such as "seamless" or "welded". Whether Equipped with a Valve: Whether the container has accessories such as a valve, which affects classification and price. Product Name: Seamless steel gas cylinder; Material: Carbon steel, grade 37Mn; Use: For containing compressed oxygen, used for industrial welding; Capacity: 40L; Brand: None; Model: WMA219-40-15; Processing Method: Seamless; Whether Equipped with a Valve: With cylinder valve. Incorrect capacity declaration: containers exceeding 300 liters should be classified under 7311, but are mistakenly declared as 7310. Unclear use description: failing to state that it contains compressed or liquefied gas, leading to incorrect classification. Material not specific: failing to indicate stainless steel or carbon steel, affecting tariffs and regulatory conditions.

Core basis for classification: 1) The material is iron or steel; 2) It is used for compressed or liquefied gas, or is a non-gas container with a capacity not exceeding 300 liters; 3) It is not a container specially designed for a particular type of machine; 4) It is not a household utensil. If the capacity is greater than 300 liters, classify under 7311; if for household use, under 7321; if for packing, it may be classified under 7310 but must be distinguished. 7311 Iron or steel containers, capacity > 300 liters: Capacity is the core difference; 7311 applies to containers > 300 liters, regardless of whether they are for gas. 7321 Iron or steel household utensils: 7310 is for industrial containers, while 7321 is for household cooking, heating, and similar utensils. 7310 Iron or steel containers, capacity not exceeding 300 liters: This code has no difference from its own subheading, but attention must be paid to the capacity boundary with 7311. 8481 Valves and other accessories: If the container has a valve, the valve is classified separately, while the container is still classified under 7310. 8609 Containers for transport: Containers for transport usually have a capacity greater than 300 liters and are classified under 8609. Is the material iron or steel? Is it used for compressed or liquefied gas? Is the capacity not exceeding 300 liters? Is it specially designed for a particular type of machine? Does it belong to household utensils?

How can I check the tariff rate for 731010? You can check the MFN rate, general rate, VAT, and regulatory conditions by entering HS code 731010 on the official website of the General Administration of Customs, China International Trade Single Window, or third-party query platforms. Note that tariff rates are adjusted, and the latest published version shall prevail. What is the difference between 731010 and 731100? 731010 applies to containers for compressed or liquefied gas, or non-gas containers with a capacity not exceeding 300 liters; 731100 applies to iron or steel containers with a capacity greater than 300 liters, regardless of whether they are for gas. Capacity is the core distinguishing point. What are the consequences of writing the wrong capacity unit during declaration? An incorrect capacity unit may lead to incorrect classification, thereby affecting tariff rates and regulatory conditions, and may even be deemed by customs as false declaration, resulting in tax recovery, fines, or administrative penalties. How should a steel container with a valve be classified? The container itself is classified under 731010. If the valve is declared separately, it is classified as a valve (such as 8481). If the valve and container are assembled as one unit, it is usually classified as a container, but this must be judged according to the specific function. Is there a difference in classification between stainless steel and carbon steel containers? HS code 731010 does not distinguish between stainless steel and carbon steel, but the material must be indicated during declaration because different materials may affect anti-dumping duties, tariffs, or regulatory conditions. Can used steel cylinders be imported? The import of used steel cylinders must comply with safety standards and may involve pre-shipment inspection, and some used containers are prohibited from import. It is recommended to consult customs or professional agencies to confirm the regulatory conditions. How should small steel gas cylinders sold via cross-border e-commerce be declared? They must be classified according to actual use and capacity. If they are for compressed gas and have a capacity not exceeding 300 liters, classify under 731010. During declaration, provide detailed product name, material, use, capacity, etc., and pay attention to dangerous goods transportation requirements. What are the regulatory conditions for 731010? Regulatory conditions vary depending on use and material and may involve A (Inbound Goods Clearance Form), B (Outbound Goods Clearance Form), etc. For specifics, consult the latest "Table of Customs Regulatory Conditions".