Chapter 83 covers various articles of base metal, but excludes certain specific articles of iron or steel (such as iron or steel articles of Chapter 73). This chapter mainly includes tools, implements, cutlery, hinges, door and window fittings, locks, ornaments, etc., of base metal. Heading 8307 specifically covers flexible tubing of base metal, but care must be taken to distinguish it from plastic tubing (Chapter 39) and rubber tubing (Chapter 40). Heading 8307 covers flexible tubing of base metal, whether or not with fittings (such as couplings, flanges). It mainly includes flexible or rigid tubular products made of base metals (such as steel, copper, aluminum), used for conveying gases, liquids, or solid particles. However, tubing made into specific machine parts (such as in Chapter 84, Chapter 87, etc.) is excluded. First 2 digits 83: indicates Chapter 83, articles of base metal. Digits 3-4 07: indicates heading 8307, flexible tubing of base metal. Digits 5-6 90: indicates subheading 830790, other tubing. Subheading 8307.10 is tubing of iron or steel, and 8307.90 is tubing of other base metals (such as copper, aluminum, nickel, etc.). Therefore, 830790 specifically refers to tubing of base metals other than iron or steel. The goods are flexible tubing of base metal, but the material is not iron or steel (such as copper or aluminum), so they are classified under 830790. If they were of iron or steel, they would be classified under 830710; if of plastic, under 3917; if of rubber, under 4009. Therefore, the material is the key factor determining classification under this code.
Chapter
Chapter 83 covers various articles of base metal, but excludes certain specific articles of iron or steel (such as iron or steel articles of Chapter 73). This chapter mainly includes tools, implements, cutlery, hinges, door and window fittings, locks, ornaments, etc., of base metal. Heading 8307 specifically covers flexible tubing of base metal, but care must be taken to distinguish it from plastic tubing (Chapter 39) and rubber tubing (Chapter 40).
Heading
Heading 8307 covers flexible tubing of base metal, whether or not with fittings (such as couplings, flanges). It mainly includes flexible or rigid tubular products made of base metals (such as steel, copper, aluminum), used for conveying gases, liquids, or solid particles. However, tubing made into specific machine parts (such as in Chapter 84, Chapter 87, etc.) is excluded.
Digit Breakdown
First 2 digits 83: indicates Chapter 83, articles of base metal. Digits 3-4 07: indicates heading 8307, flexible tubing of base metal. Digits 5-6 90: indicates subheading 830790, other tubing. Subheading 8307.10 is tubing of iron or steel, and 8307.90 is tubing of other base metals (such as copper, aluminum, nickel, etc.). Therefore, 830790 specifically refers to tubing of base metals other than iron or steel.
Classification Basis
The goods are flexible tubing of base metal, but the material is not iron or steel (such as copper or aluminum), so they are classified under 830790. If they were of iron or steel, they would be classified under 830710; if of plastic, under 3917; if of rubber, under 4009. Therefore, the material is the key factor determining classification under this code.
📝 Declaration Elements
Product Name: The specific name of the declared goods, such as 'copper tubing', 'aluminum corrugated tubing', etc., and the material and use must be specified. Material: Accurately declare the type of base metal, such as copper, aluminum, nickel, etc.; do not generally write 'base metal'. Use: Explain the specific use scenario of the tubing, such as 'used in automotive fuel systems', 'used for industrial gas conveyance', etc. Structure: Describe the structure of the tubing, such as 'corrugated tubing', 'spiral tubing', 'seamless tubing', etc., and whether it has a reinforcing layer. Whether with Fittings: Declare whether it has fittings such as couplings, flanges, etc., and the material of the fittings. Specifications and Dimensions: Declare dimensional parameters such as outer diameter, inner diameter, wall thickness, length, etc., of the tubing. Brand: Declare the brand name; if no brand, indicate 'no brand'. Model: Declare the product model for easy identification and classification. Product Name: Copper corrugated tubing; Material: Copper; Use: Used for air conditioning refrigerant conveyance; Structure: Corrugated tubing with braided mesh reinforcing layer; Whether with Fittings: Brass couplings at both ends; Specifications and Dimensions: Outer diameter 12mm, inner diameter 8mm, length 1m; Brand: ABC; Model: XYZ-123. Inaccurate material declaration, such as reporting copper alloy as pure copper, affecting subheading classification. Use description is too general to determine whether it is a general-purpose part or a special-purpose part. Ignoring fitting information; if the fitting is of base metal and integrated with the tubing, it is still classified under 830790, but if the fitting is of other material, it must be classified separately.
Product Name
The specific name of the declared goods, such as 'copper tubing', 'aluminum corrugated tubing', etc., and the material and use must be specified.
⚠️ Declaring only 'tubing' without specifying the material, leading to classification disputes.
Material
Accurately declare the type of base metal, such as copper, aluminum, nickel, etc.; do not generally write 'base metal'.
⚠️ Misreporting copper alloy as pure copper, or failing to specify alloy composition.
Use
Explain the specific use scenario of the tubing, such as 'used in automotive fuel systems', 'used for industrial gas conveyance', etc.
⚠️ The use description is too broad, such as 'used in industry', which cannot assist classification.
Structure
Describe the structure of the tubing, such as 'corrugated tubing', 'spiral tubing', 'seamless tubing', etc., and whether it has a reinforcing layer.
⚠️ Failure to distinguish corrugated tubing from smooth tubing, affecting classification.
Whether with Fittings
Declare whether it has fittings such as couplings, flanges, etc., and the material of the fittings.
⚠️ Omitting fitting information, leading to classification errors.
Specifications and Dimensions
Declare dimensional parameters such as outer diameter, inner diameter, wall thickness, length, etc., of the tubing.
⚠️ Inconsistent units of dimensions, such as mixing millimeters and inches.
Brand
Declare the brand name; if no brand, indicate 'no brand'.
⚠️ Confusing brand with manufacturer, or failing to declare truthfully.
Model
Declare the product model for easy identification and classification.
⚠️ Incomplete or incorrect model entry.
Example： Product Name: Copper corrugated tubing; Material: Copper; Use: Used for air conditioning refrigerant conveyance; Structure: Corrugated tubing with braided mesh reinforcing layer; Whether with Fittings: Brass couplings at both ends; Specifications and Dimensions: Outer diameter 12mm, inner diameter 8mm, length 1m; Brand: ABC; Model: XYZ-123.
Common Mistakes：
Inaccurate material declaration, such as reporting copper alloy as pure copper, affecting subheading classification.
Use description is too general to determine whether it is a general-purpose part or a special-purpose part.
Ignoring fitting information; if the fitting is of base metal and integrated with the tubing, it is still classified under 830790, but if the fitting is of other material, it must be classified separately.
🎯 Classification Logic
The core basis for classification is material and structure. First confirm that the tubing is made of base metal and is not iron or steel (otherwise classified under 830710). Second, the tubing should be a general-purpose product; if it is dedicated to a certain machine (such as automobiles, machine tools), it may be classified under Chapter 84 or Chapter 87. In addition, attention must be paid to the difference from plastic tubing (3917) and rubber tubing (4009). 830710 Tubing of iron or steel: The material is iron or steel, while 830790 is other base metals (such as copper, aluminum). 391731 Plastic tubing: The material is plastic, while 830790 is base metal, which can be distinguished by material. 400911 Rubber tubing: The material is vulcanized rubber, while 830790 is base metal and usually has a reinforcing layer. 848180 Other valves and similar devices: If the tubing has valves and other devices, it may be classified under 8481, but simple tubing with couplings is still classified under 8307. Is the material base metal? Is it not iron or steel? Is it dedicated to a certain machine? Does it have fittings? Is it confused with plastic or rubber tubing?
Basis
The core basis for classification is material and structure. First confirm that the tubing is made of base metal and is not iron or steel (otherwise classified under 830710). Second, the tubing should be a general-purpose product; if it is dedicated to a certain machine (such as automobiles, machine tools), it may be classified under Chapter 84 or Chapter 87. In addition, attention must be paid to the difference from plastic tubing (3917) and rubber tubing (4009).
Confused Codes：
830710 - Tubing of iron or steel
The material is iron or steel, while 830790 is other base metals (such as copper, aluminum).
391731 - Plastic tubing
The material is plastic, while 830790 is base metal, which can be distinguished by material.
400911 - Rubber tubing
The material is vulcanized rubber, while 830790 is base metal and usually has a reinforcing layer.
848180 - Other valves and similar devices
If the tubing has valves and other devices, it may be classified under 8481, but simple tubing with couplings is still classified under 8307.
Self-Check：
✓ Is the material base metal?
✓ Is it not iron or steel?
✓ Is it dedicated to a certain machine?
✓ Does it have fittings?
✓ Is it confused with plastic or rubber tubing?
❓ FAQ
How to inquire about the tariff rate for 830790? You can check the latest import tariff rate, value-added tax rate, and regulatory conditions by entering HS code 830790 on the official website of the General Administration of Customs, China International Trade Single Window, or third-party inquiry platforms. Tariff rates are adjusted with policies, and it is recommended to rely on the customs system at the time of declaration. What is the main difference between 830790 and 830710? The main difference lies in the material: 830710 is tubing of iron or steel, and 830790 is tubing of other base metals (such as copper, aluminum, nickel, etc.). The material composition must be accurately provided at the time of declaration. If copper tubing has a plastic coupling, which code should it be classified under? If the main body of the tubing is copper and the coupling is plastic, it is usually classified according to the tubing material under 830790. However, if the coupling and tubing are separable and declared separately, they must be classified separately. Are automotive brake hoses classified under 830790? Automotive brake hoses are usually made of rubber or plastic. If made of base metal and dedicated to automobiles, they may be classified under 8708 (motor vehicle parts). Judgment must be based on material and dedication. In the declaration elements for 830790, how should the use be filled in? The use should be specific, such as 'used for air conditioning refrigerant conveyance', 'used for industrial gas pipelines', etc., avoiding vague descriptions such as 'used in industry', so that customs can classify accurately. Is there a difference in classification between corrugated tubing and smooth tubing? Under 830790, corrugated and smooth structures do not affect classification; both are classified under the same subheading. However, the structure may affect the filling of declaration elements and customs valuation. What regulatory documents are required for importing base metal tubing? Basic documents such as contract, invoice, packing list, and bill of lading are usually required. If special equipment or pressure vessels are involved, relevant licenses may be required. Specific requirements are subject to customs.
Q: How to inquire about the tariff rate for 830790?
A: You can check the latest import tariff rate, value-added tax rate, and regulatory conditions by entering HS code 830790 on the official website of the General Administration of Customs, China International Trade Single Window, or third-party inquiry platforms. Tariff rates are adjusted with policies, and it is recommended to rely on the customs system at the time of declaration.
Q: What is the main difference between 830790 and 830710?
A: The main difference lies in the material: 830710 is tubing of iron or steel, and 830790 is tubing of other base metals (such as copper, aluminum, nickel, etc.). The material composition must be accurately provided at the time of declaration.
Q: If copper tubing has a plastic coupling, which code should it be classified under?
A: If the main body of the tubing is copper and the coupling is plastic, it is usually classified according to the tubing material under 830790. However, if the coupling and tubing are separable and declared separately, they must be classified separately.
Q: Are automotive brake hoses classified under 830790?
A: Automotive brake hoses are usually made of rubber or plastic. If made of base metal and dedicated to automobiles, they may be classified under 8708 (motor vehicle parts). Judgment must be based on material and dedication.
Q: In the declaration elements for 830790, how should the use be filled in?
A: The use should be specific, such as 'used for air conditioning refrigerant conveyance', 'used for industrial gas pipelines', etc., avoiding vague descriptions such as 'used in industry', so that customs can classify accurately.
Q: Is there a difference in classification between corrugated tubing and smooth tubing?
A: Under 830790, corrugated and smooth structures do not affect classification; both are classified under the same subheading. However, the structure may affect the filling of declaration elements and customs valuation.
Q: What regulatory documents are required for importing base metal tubing?
A: Basic documents such as contract, invoice, packing list, and bill of lading are usually required. If special equipment or pressure vessels are involved, relevant licenses may be required. Specific requirements are subject to customs.
⚠️ Disclaimer: HS code classification, declaration elements, tariff rates and regulatory conditions on this page are for reference only and do not constitute legal advice on customs classification. Tariff rates and regulations are subject to change; the latest announcements from the General Administration of Customs and on-site determinations shall prevail. Please consult professional customs brokers or customs authorities before import/export.