Chapter 73 covers articles of iron or steel, including various products made directly from iron or steel, but excludes raw materials for steel smelting, mineral products, and certain specific items (such as machinery, vehicles, etc.). This chapter ranges from semi-finished steel products (such as ingots, billets) to final products (such as pipe fittings, containers, fasteners), and is a core chapter for the classification of iron and steel commodities in international trade, involving a large number of industrial parts and daily necessities. Heading 7307 specifically covers pipe fittings of iron or steel (such as joints, elbows, flanges), used for connecting or securing pipes. These fittings are usually made by casting, forging, or machining, with the material being iron or steel. This heading includes cast steel, cast iron, and stainless steel pipe fittings, but excludes assembled valves or machine parts. The first 2 digits "73" represent Chapter 73 (articles of iron or steel). The 3rd-4th digits "07" represent heading 7307 (pipe fittings of iron or steel). The 5th-6th digits "19" are a subheading specifically referring to "other cast steel fittings," i.e., connecting fittings for pipes made by casting, but different from cast iron fittings (subheading 7307.11) or stainless steel castings (subheading 7307.21, etc.). This subheading covers cast steel pipe fittings that are not stainless steel, such as carbon steel castings, and are not named in other subheadings. This commodity is a cast steel fitting and is used for pipe connection, which conforms to the description of heading 7307. Since the material is cast steel (not cast iron, not stainless steel), and it is not specifically named as a flange, elbow, etc., it is classified under subheading 7307.19 "other cast steel fittings." If it were a stainless steel casting, it would be classified under 7307.21; if it were a cast iron fitting, it would be classified under 7307.11.
Chapter
Chapter 73 covers articles of iron or steel, including various products made directly from iron or steel, but excludes raw materials for steel smelting, mineral products, and certain specific items (such as machinery, vehicles, etc.). This chapter ranges from semi-finished steel products (such as ingots, billets) to final products (such as pipe fittings, containers, fasteners), and is a core chapter for the classification of iron and steel commodities in international trade, involving a large number of industrial parts and daily necessities.
Heading
Heading 7307 specifically covers pipe fittings of iron or steel (such as joints, elbows, flanges), used for connecting or securing pipes. These fittings are usually made by casting, forging, or machining, with the material being iron or steel. This heading includes cast steel, cast iron, and stainless steel pipe fittings, but excludes assembled valves or machine parts.
Digit Breakdown
The first 2 digits "73" represent Chapter 73 (articles of iron or steel). The 3rd-4th digits "07" represent heading 7307 (pipe fittings of iron or steel). The 5th-6th digits "19" are a subheading specifically referring to "other cast steel fittings," i.e., connecting fittings for pipes made by casting, but different from cast iron fittings (subheading 7307.11) or stainless steel castings (subheading 7307.21, etc.). This subheading covers cast steel pipe fittings that are not stainless steel, such as carbon steel castings, and are not named in other subheadings.
Classification Basis
This commodity is a cast steel fitting and is used for pipe connection, which conforms to the description of heading 7307. Since the material is cast steel (not cast iron, not stainless steel), and it is not specifically named as a flange, elbow, etc., it is classified under subheading 7307.19 "other cast steel fittings." If it were a stainless steel casting, it would be classified under 7307.21; if it were a cast iron fitting, it would be classified under 7307.11.
📝 Declaration Elements
Product Name: The specific name of the declared commodity, such as "cast steel elbow," "cast steel tee," etc., must be consistent with the actual item. Material: Clearly specify the type of iron or steel, such as "carbon steel," "alloy steel," etc., and indicate that it is cast steel. Use: Explain the specific use, such as "pipe connection," "used for oil pipelines," etc. Processing Method: Indicate "casting" and subsequent processing (such as machining) to distinguish from forged parts. Specifications and Model: Fill in dimensions, pressure rating, standards, etc., such as "DN50, PN16." Brand: If there is a brand, it must be declared; if there is no brand, fill in "none." GTIN: If there is a Global Trade Item Number, it must be declared; if not, fill in "none." Product Name: Cast steel elbow; Material: Carbon steel (cast steel); Use: Pipe connection; Processing Method: Casting; Specifications and Model: DN100, PN16, ASME B16.5; Brand: None; GTIN: None. Mistakenly declaring cast steel parts as stainless steel parts, causing the subheading to be incorrectly classified from 7307.19 to 7307.21. Failure to indicate the "casting" processing method, which may cause it to be mistaken for a forged part and classified under another heading. Incomplete declaration of specifications and model, such as missing pressure rating, affecting customs confirmation of classification.
Product Name
The specific name of the declared commodity, such as "cast steel elbow," "cast steel tee," etc., must be consistent with the actual item.
⚠️ Writing only "pipe fitting" or "cast steel fitting" is too general and may easily lead to classification disputes.
Material
Clearly specify the type of iron or steel, such as "carbon steel," "alloy steel," etc., and indicate that it is cast steel.
⚠️ Mistakenly writing "stainless steel" or "cast iron," leading to an incorrect subheading.
Use
Explain the specific use, such as "pipe connection," "used for oil pipelines," etc.
⚠️ Writing "industrial use" is too broad; it should be specific to pipe connection.
Processing Method
Indicate "casting" and subsequent processing (such as machining) to distinguish from forged parts.
⚠️ Omitting "casting" or mistakenly writing "forging," affecting classification.
Specifications and Model
Fill in dimensions, pressure rating, standards, etc., such as "DN50, PN16."
⚠️ Failure to provide dimensions or pressure rating, making it impossible to determine the specific subheading.
Brand
If there is a brand, it must be declared; if there is no brand, fill in "none."
⚠️ Failure to declare the brand, affecting customs protection of intellectual property rights.
GTIN
If there is a Global Trade Item Number, it must be declared; if not, fill in "none."
⚠️ Ignoring GTIN, resulting in an incomplete customs declaration form.
Mistakenly declaring cast steel parts as stainless steel parts, causing the subheading to be incorrectly classified from 7307.19 to 7307.21.
Failure to indicate the "casting" processing method, which may cause it to be mistaken for a forged part and classified under another heading.
Incomplete declaration of specifications and model, such as missing pressure rating, affecting customs confirmation of classification.
🎯 Classification Logic
The core basis for classification is: 1) the material is cast steel (not cast iron, not stainless steel); 2) the use is pipe connection; 3) it conforms to the description of heading 7307 "pipe fittings of iron or steel"; 4) it is not specifically named as a flange, elbow, etc. (otherwise it may be classified under another subheading). At the same time, assembled valves (8481) or machine parts (8487) must be excluded. 730711 Cast iron pipe fittings: The material is cast iron, not cast steel. Cast iron parts usually have high carbon content and different mechanical properties, and must be distinguished by material when classifying. 730721 Stainless steel flanges: The material is stainless steel, and it is specifically a flange. If it is a cast steel flange, it is classified under 730719; if it is a stainless steel cast steel flange, it is classified under 730721. 730722 Stainless steel threaded elbows: The material is stainless steel, and it is threaded connection. If the cast steel elbow is butt-welded or socket-welded, it is classified under 730719. 730799 Other pipe fittings of iron or steel: This subheading covers pipe fittings of iron or steel that are not cast steel, such as forged steel, welded parts. Cast steel parts must be classified under 730719. 848180 Valves and similar devices: Valves are used to control flow, while pipe fittings are only used for connection. If a cast steel part has a valve function, it is classified under 8481. Is the material cast steel? Is the use pipe connection? Is it specifically named as a flange, elbow, etc.? Does it have a valve function? Is the processing method casting?
Basis
The core basis for classification is: 1) the material is cast steel (not cast iron, not stainless steel); 2) the use is pipe connection; 3) it conforms to the description of heading 7307 "pipe fittings of iron or steel"; 4) it is not specifically named as a flange, elbow, etc. (otherwise it may be classified under another subheading). At the same time, assembled valves (8481) or machine parts (8487) must be excluded.
Confused Codes：
730711 - Cast iron pipe fittings
The material is cast iron, not cast steel. Cast iron parts usually have high carbon content and different mechanical properties, and must be distinguished by material when classifying.
730721 - Stainless steel flanges
The material is stainless steel, and it is specifically a flange. If it is a cast steel flange, it is classified under 730719; if it is a stainless steel cast steel flange, it is classified under 730721.
730722 - Stainless steel threaded elbows
The material is stainless steel, and it is threaded connection. If the cast steel elbow is butt-welded or socket-welded, it is classified under 730719.
730799 - Other pipe fittings of iron or steel
This subheading covers pipe fittings of iron or steel that are not cast steel, such as forged steel, welded parts. Cast steel parts must be classified under 730719.
848180 - Valves and similar devices
Valves are used to control flow, while pipe fittings are only used for connection. If a cast steel part has a valve function, it is classified under 8481.
Self-Check：
✓ Is the material cast steel?
✓ Is the use pipe connection?
✓ Is it specifically named as a flange, elbow, etc.?
✓ Does it have a valve function?
✓ Is the processing method casting?
❓ FAQ
How can I check the import tariff rate for 730719? You can check the latest tariff rate through the official website of the General Administration of Customs of China or the International Trade Single Window. Tariff rates vary depending on trade agreements, country of origin, and other factors. It is recommended to rely on the feedback from the customs system at the time of declaration. What is the difference in classification between cast steel parts and cast iron parts? Cast steel parts are classified under 730719, and cast iron parts under 730711. The main difference is the material: cast steel has lower carbon content and good toughness; cast iron has high carbon content and is brittle. Material certification must be provided at the time of declaration. If a cast steel part is used for non-pipe connection, can it still be classified under 730719? No. 7307 only applies to pipe fittings for pipe connection. If used for other purposes (such as machine parts), it should be classified under the corresponding heading according to actual use, such as 8487. How should the declaration element "Processing Method" be filled in during customs declaration? It should indicate "casting," and may supplement subsequent processing such as "machining." If it is forging, it cannot be classified under 730719, but should be classified under 730799 or another subheading. Does 730719 include stainless steel cast steel parts? No. Stainless steel cast steel parts should be classified under 730721 (flanges) or 730722 (threaded elbows), etc. 730719 only applies to cast steel parts that are not stainless steel. How can cross-border e-commerce sales of cast steel parts simplify declaration? Cross-border e-commerce can simplify declaration based on order information, but key elements such as product name, material, and use must be accurate. It is recommended to use HS code 730719 and retain material certification for inspection. What is the difference between 730719 and 730791? 730791 is a flange of iron or steel, but the material is forged steel or other non-cast steel. If the flange is cast steel, it is classified under 730719. The difference lies in the processing method and material. If a cast steel part is threaded, does the classification change? If it is a stainless steel cast steel threaded part, it is classified under 730722; if it is a non-stainless steel cast steel threaded part, it is still classified under 730719. Thread processing does not change the material-based classification principle.
Q: How can I check the import tariff rate for 730719?
A: You can check the latest tariff rate through the official website of the General Administration of Customs of China or the International Trade Single Window. Tariff rates vary depending on trade agreements, country of origin, and other factors. It is recommended to rely on the feedback from the customs system at the time of declaration.
Q: What is the difference in classification between cast steel parts and cast iron parts?
A: Cast steel parts are classified under 730719, and cast iron parts under 730711. The main difference is the material: cast steel has lower carbon content and good toughness; cast iron has high carbon content and is brittle. Material certification must be provided at the time of declaration.
Q: If a cast steel part is used for non-pipe connection, can it still be classified under 730719?
A: No. 7307 only applies to pipe fittings for pipe connection. If used for other purposes (such as machine parts), it should be classified under the corresponding heading according to actual use, such as 8487.
Q: How should the declaration element "Processing Method" be filled in during customs declaration?
A: It should indicate "casting," and may supplement subsequent processing such as "machining." If it is forging, it cannot be classified under 730719, but should be classified under 730799 or another subheading.
Q: Does 730719 include stainless steel cast steel parts?
A: No. Stainless steel cast steel parts should be classified under 730721 (flanges) or 730722 (threaded elbows), etc. 730719 only applies to cast steel parts that are not stainless steel.
Q: How can cross-border e-commerce sales of cast steel parts simplify declaration?
A: Cross-border e-commerce can simplify declaration based on order information, but key elements such as product name, material, and use must be accurate. It is recommended to use HS code 730719 and retain material certification for inspection.
Q: What is the difference between 730719 and 730791?
A: 730791 is a flange of iron or steel, but the material is forged steel or other non-cast steel. If the flange is cast steel, it is classified under 730719. The difference lies in the processing method and material.
Q: If a cast steel part is threaded, does the classification change?
A: If it is a stainless steel cast steel threaded part, it is classified under 730722; if it is a non-stainless steel cast steel threaded part, it is still classified under 730719. Thread processing does not change the material-based classification principle.
⚠️ 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.