Chapter 73 covers articles of iron or steel, including steel pipe fittings, structural components, containers, fasteners, springs, chains, etc. This chapter ranges from 7301 to 7326 and involves iron or steel products produced by casting, forging, welding, and other processes, but excludes specialized equipment such as machinery and vehicles (classified under Chapters 84, 85, etc.). Heading 7307 specifically covers steel pipe fittings, such as flanges, elbows, tees, etc., used for pipeline connections. Heading 7307 covers steel pipe fittings, including flanges, elbows, reducers, tees, etc., used for connecting pipeline systems. These fittings are typically made by casting, forging, or welding, and are made of iron or steel. 7307 does not include similar products from other chapters, such as copper fittings (7412) or plastic fittings (3917). Subheading 730721 specifically refers to stainless steel flanges. First 2 digits 73: Chapter 73, articles of iron or steel. Digits 3-4: 07: Heading 7307, steel pipe fittings. Digits 5-6: 21: Subheading 730721, stainless steel flanges. Among these, the 5th digit 2 indicates flanges made of stainless steel, and the 6th digit 1 is a further subdivision. The complete code 730721 means flanges made of stainless steel, used for pipeline connections, typically obtained by forging or casting. This commodity is a stainless steel flange, which belongs to steel pipe fittings, so it is classified under 7307. Because the material is stainless steel, it is further classified under 730721. If it were made of other materials such as carbon steel, it would be classified under 730791; if it were other pipe fittings such as elbows, it would be classified under 730722, etc.
Chapter
Chapter 73 covers articles of iron or steel, including steel pipe fittings, structural components, containers, fasteners, springs, chains, etc. This chapter ranges from 7301 to 7326 and involves iron or steel products produced by casting, forging, welding, and other processes, but excludes specialized equipment such as machinery and vehicles (classified under Chapters 84, 85, etc.). Heading 7307 specifically covers steel pipe fittings, such as flanges, elbows, tees, etc., used for pipeline connections.
Heading
Heading 7307 covers steel pipe fittings, including flanges, elbows, reducers, tees, etc., used for connecting pipeline systems. These fittings are typically made by casting, forging, or welding, and are made of iron or steel. 7307 does not include similar products from other chapters, such as copper fittings (7412) or plastic fittings (3917). Subheading 730721 specifically refers to stainless steel flanges.
Digit Breakdown
First 2 digits 73: Chapter 73, articles of iron or steel. Digits 3-4: 07: Heading 7307, steel pipe fittings. Digits 5-6: 21: Subheading 730721, stainless steel flanges. Among these, the 5th digit 2 indicates flanges made of stainless steel, and the 6th digit 1 is a further subdivision. The complete code 730721 means flanges made of stainless steel, used for pipeline connections, typically obtained by forging or casting.
Classification Basis
This commodity is a stainless steel flange, which belongs to steel pipe fittings, so it is classified under 7307. Because the material is stainless steel, it is further classified under 730721. If it were made of other materials such as carbon steel, it would be classified under 730791; if it were other pipe fittings such as elbows, it would be classified under 730722, etc.
📝 Declaration Elements
Product Name: Declared commodity name should accurately describe it as a stainless steel flange, avoiding vague descriptions such as iron or steel products. Material: Specific stainless steel grade, such as 304, 316, etc., must comply with standards. Specifications and Model: Flange dimensions, pressure rating, sealing face form, etc., such as DN50 PN16 RF. Processing Method: State whether it is forged, cast, or welded, etc., which affects classification. Use: For connecting pipelines; the application field such as petroleum, chemicals, etc., must be stated. Brand: If there is a brand, the brand name must be declared; if there is no brand, write none. GTIN: If there is a Global Trade Item Number, it must be declared; if not, write none. Product Name: Stainless steel flange; Material: Stainless steel 304; Specifications and Model: DN50 PN16 RF; Processing Method: Forged; Use: For petroleum pipeline connection; Brand: None; GTIN: None. Material declaration is not specific, only writing stainless steel, leading to classification disputes. Specifications and model are incomplete, making it impossible to determine whether it is a flange. Incorrect processing method, declaring a cast flange as forged, affecting the tax rate.
Product Name
Declared commodity name should accurately describe it as a stainless steel flange, avoiding vague descriptions such as iron or steel products.
⚠️ Incorrectly declaring as carbon steel flange or alloy steel flange.
Material
Specific stainless steel grade, such as 304, 316, etc., must comply with standards.
⚠️ Only writing stainless steel without providing the specific grade.
Specifications and Model
Flange dimensions, pressure rating, sealing face form, etc., such as DN50 PN16 RF.
⚠️ Incomplete specifications and model or inconsistent with the actual product.
Processing Method
State whether it is forged, cast, or welded, etc., which affects classification.
⚠️ Declaring a forged flange as a cast flange.
Use
For connecting pipelines; the application field such as petroleum, chemicals, etc., must be stated.
⚠️ Use description is too broad, such as for industrial use.
Brand
If there is a brand, the brand name must be declared; if there is no brand, write none.
⚠️ Brand inconsistent with the actual product or omitted.
GTIN
If there is a Global Trade Item Number, it must be declared; if not, write none.
Material declaration is not specific, only writing stainless steel, leading to classification disputes.
Specifications and model are incomplete, making it impossible to determine whether it is a flange.
Incorrect processing method, declaring a cast flange as forged, affecting the tax rate.
🎯 Classification Logic
Classification basis: According to the Import and Export Tariff, 730721 is stainless steel flanges. Key determination points: 1. The material is stainless steel; 2. The product is a flange used for pipeline connections; 3. It conforms to the description of heading 7307. If it is made of other materials or is not a pipe fitting, it is classified under other codes. 730791 Other iron or steel flanges: The material is not stainless steel, such as carbon steel, classified under 730791; stainless steel flanges are classified under 730721. 730722 Stainless steel elbows, reducers: The product type is different; flanges are classified under 730721, while elbows, etc., are classified under 730722. 730723 Stainless steel butt-welding pipe fittings: Butt-welding pipe fittings such as elbows and tees are classified under 730723; flanges are classified under 730721. 848180 Valves and similar devices: If the flange is integrated with a valve, it may be classified under 8481; a separate flange is classified under 730721. Is the material stainless steel? Is the product a flange? Is it used for pipeline connections? Does the processing method affect classification? Is it combined with other parts?
Basis
Classification basis: According to the Import and Export Tariff, 730721 is stainless steel flanges. Key determination points: 1. The material is stainless steel; 2. The product is a flange used for pipeline connections; 3. It conforms to the description of heading 7307. If it is made of other materials or is not a pipe fitting, it is classified under other codes.
Confused Codes：
730791 - Other iron or steel flanges
The material is not stainless steel, such as carbon steel, classified under 730791; stainless steel flanges are classified under 730721.
730722 - Stainless steel elbows, reducers
The product type is different; flanges are classified under 730721, while elbows, etc., are classified under 730722.
Butt-welding pipe fittings such as elbows and tees are classified under 730723; flanges are classified under 730721.
848180 - Valves and similar devices
If the flange is integrated with a valve, it may be classified under 8481; a separate flange is classified under 730721.
Self-Check：
✓ Is the material stainless steel?
✓ Is the product a flange?
✓ Is it used for pipeline connections?
✓ Does the processing method affect classification?
✓ Is it combined with other parts?
❓ FAQ
How do I look up the HS code for stainless steel flanges? You can check through the customs tariff, classification decisions, or consult a customs broker. The key is to determine that the material is stainless steel and the product is a flange, then it can be classified under 730721. What is the difference in HS codes between stainless steel flanges and carbon steel flanges? Stainless steel flanges are classified under 730721, and carbon steel flanges under 730791; the difference lies in the material. What elements are required when declaring stainless steel flanges? Product name, material, specifications and model, processing method, use, brand, GTIN, etc., are required. How do I check the tax rate for stainless steel flanges? The tax rate can be checked through the customs tariff or by using the tariff inquiry system of the General Administration of Customs. Note that tax rates may change, so the latest version shall prevail. If the flange is used for a valve, under which code should it be classified? If the flange is integrated with a valve, it should be classified under 8481; if it is a separate flange, it remains under 730721. Does the processing method of stainless steel flanges affect classification? The processing method (forging, casting) does not affect classification under 730721, but it may affect other codes. How do I distinguish stainless steel flanges from pipe fittings? Flanges are used to connect pipelines, while pipe fittings such as elbows are used to change direction. Flanges are classified under 730721, and pipe fittings under 730722, etc. What certifications are required for importing stainless steel flanges? They must comply with Chinese standards and may require material certificates, pressure test reports, etc. The specifics depend on the use and regulations.
Q: How do I look up the HS code for stainless steel flanges?
A: You can check through the customs tariff, classification decisions, or consult a customs broker. The key is to determine that the material is stainless steel and the product is a flange, then it can be classified under 730721.
Q: What is the difference in HS codes between stainless steel flanges and carbon steel flanges?
A: Stainless steel flanges are classified under 730721, and carbon steel flanges under 730791; the difference lies in the material.
Q: What elements are required when declaring stainless steel flanges?
A: Product name, material, specifications and model, processing method, use, brand, GTIN, etc., are required.
Q: How do I check the tax rate for stainless steel flanges?
A: The tax rate can be checked through the customs tariff or by using the tariff inquiry system of the General Administration of Customs. Note that tax rates may change, so the latest version shall prevail.
Q: If the flange is used for a valve, under which code should it be classified?
A: If the flange is integrated with a valve, it should be classified under 8481; if it is a separate flange, it remains under 730721.
Q: Does the processing method of stainless steel flanges affect classification?
A: The processing method (forging, casting) does not affect classification under 730721, but it may affect other codes.
Q: How do I distinguish stainless steel flanges from pipe fittings?
A: Flanges are used to connect pipelines, while pipe fittings such as elbows are used to change direction. Flanges are classified under 730721, and pipe fittings under 730722, etc.
Q: What certifications are required for importing stainless steel flanges?
A: They must comply with Chinese standards and may require material certificates, pressure test reports, etc. The specifics depend on the use and regulations.
⚠️ 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.