Chapter 73 covers articles of iron or steel, including tubes, pipes, hollow profiles, and tube or pipe fittings of iron or steel. This chapter ranges from primary products of iron or steel to final products, but excludes goods specified in other chapters of Section XV notes (such as machine parts, vehicle parts, etc.). Heading 7304 pertains to seamless steel pipes, an important category of steel tubular products, widely used in petroleum, chemical, boiler, machinery manufacturing, and other fields. Heading 7304 covers seamless steel pipes and hollow profiles, including seamless pipes made by hot rolling, hot drawing, cold drawing, cold rolling, and other processes. Under this heading, it is further subdivided based on manufacturing process and use, such as oil drill pipes, boiler tubes, geological drill pipes, etc. 7304 includes various seamless pipes with different dimensions such as outer diameter and wall thickness, but excludes welded pipes (classified under 7305 or 7306). The first 2 digits 73 indicate Chapter 73, articles of iron or steel. Digits 3-4, 04, indicate heading 7304, i.e., seamless steel pipes and hollow profiles. Digits 5-6, 31, indicate subheading 730431, specifically cold-drawn or cold-rolled seamless steel pipes, not further worked (e.g., not subjected to other subsequent processing). Among them, the 5th digit 3 indicates cold-drawn or cold-rolled, and the 6th digit 1 indicates circular cross-section. Therefore, 730431 specifically refers to cold-drawn or cold-rolled circular cross-section seamless steel pipes. This commodity is a cold-drawn seamless steel pipe, belonging to seamless steel pipes and having undergone cold drawing, therefore classified under 7304. Since it is cold-drawn (not hot-rolled) and has a circular cross-section, it is classified under subheading 730431. If hot-rolled, it would be classified under 730439; if other cross-sections, under 730439, etc. Welded pipes should be classified under 7305 or 7306, so they are not classified in this heading.
Chapter
Chapter 73 covers articles of iron or steel, including tubes, pipes, hollow profiles, and tube or pipe fittings of iron or steel. This chapter ranges from primary products of iron or steel to final products, but excludes goods specified in other chapters of Section XV notes (such as machine parts, vehicle parts, etc.). Heading 7304 pertains to seamless steel pipes, an important category of steel tubular products, widely used in petroleum, chemical, boiler, machinery manufacturing, and other fields.
Heading
Heading 7304 covers seamless steel pipes and hollow profiles, including seamless pipes made by hot rolling, hot drawing, cold drawing, cold rolling, and other processes. Under this heading, it is further subdivided based on manufacturing process and use, such as oil drill pipes, boiler tubes, geological drill pipes, etc. 7304 includes various seamless pipes with different dimensions such as outer diameter and wall thickness, but excludes welded pipes (classified under 7305 or 7306).
Digit Breakdown
The first 2 digits 73 indicate Chapter 73, articles of iron or steel. Digits 3-4, 04, indicate heading 7304, i.e., seamless steel pipes and hollow profiles. Digits 5-6, 31, indicate subheading 730431, specifically cold-drawn or cold-rolled seamless steel pipes, not further worked (e.g., not subjected to other subsequent processing). Among them, the 5th digit 3 indicates cold-drawn or cold-rolled, and the 6th digit 1 indicates circular cross-section. Therefore, 730431 specifically refers to cold-drawn or cold-rolled circular cross-section seamless steel pipes.
Classification Basis
This commodity is a cold-drawn seamless steel pipe, belonging to seamless steel pipes and having undergone cold drawing, therefore classified under 7304. Since it is cold-drawn (not hot-rolled) and has a circular cross-section, it is classified under subheading 730431. If hot-rolled, it would be classified under 730439; if other cross-sections, under 730439, etc. Welded pipes should be classified under 7305 or 7306, so they are not classified in this heading.
📝 Declaration Elements
Product Name: The specific name of the declared commodity should accurately describe it as cold-drawn seamless steel pipe, avoiding the general term steel pipe. Material: Fill in the steel grade or chemical composition, such as 20#, 45#, 304 stainless steel, etc. Specifications: Fill in outer diameter, wall thickness, length, and other dimensions, such as outer diameter 50mm, wall thickness 3mm, length 6m. Manufacturing Process: Specify cold-drawn or cold-rolled, and indicate whether subsequent heat treatment, etc., has been applied. Use: Fill in the main use, such as oil pipeline, boiler tube, machining, etc. Cross-sectional Shape: Fill in circular, square, rectangular, etc. This code is for circular. Brand: Fill in the manufacturer or brand; if no brand, fill in 'none'. Grade: Fill in the specific steel grade, such as Q235, 10#, 20#, etc. Product Name: Cold-drawn seamless steel pipe; Material: 20# carbon steel; Specifications: Outer diameter 50mm, wall thickness 3mm, length 6m; Manufacturing Process: Cold-drawn; Use: Machining; Cross-sectional Shape: Circular; Brand: None; Grade: 20#. Failure to specify the manufacturing process as cold-drawn, leading to incorrect classification. Incomplete specification description, lacking wall thickness or outer diameter, affecting customs valuation. Use filled in too generally, such as 'for industrial use', which may raise questions.
Product Name
The specific name of the declared commodity should accurately describe it as cold-drawn seamless steel pipe, avoiding the general term steel pipe.
⚠️ Incorrectly declared as 'seamless pipe' or 'cold-drawn pipe', without specifying material and process.
Material
Fill in the steel grade or chemical composition, such as 20#, 45#, 304 stainless steel, etc.
⚠️ Only filling in 'steel' or 'carbon steel', without providing specific grade.
Specifications
Fill in outer diameter, wall thickness, length, and other dimensions, such as outer diameter 50mm, wall thickness 3mm, length 6m.
⚠️ Omitting wall thickness or outer diameter, only writing 'diameter 50mm'.
Manufacturing Process
Specify cold-drawn or cold-rolled, and indicate whether subsequent heat treatment, etc., has been applied.
⚠️ Incorrectly reporting as hot-rolled or not specifying the process.
Use
Fill in the main use, such as oil pipeline, boiler tube, machining, etc.
⚠️ Filling in 'general' or 'other', not specific enough.
Cross-sectional Shape
Fill in circular, square, rectangular, etc. This code is for circular.
⚠️ Not specifying the shape or incorrectly reporting as another shape.
Brand
Fill in the manufacturer or brand; if no brand, fill in 'none'.
⚠️ Omitting brand information.
Grade
Fill in the specific steel grade, such as Q235, 10#, 20#, etc.
⚠️ Confusing with material, not filling in the grade.
Use filled in too generally, such as 'for industrial use', which may raise questions.
🎯 Classification Logic
The core basis for classification is: 1) Material is iron or steel; 2) Seamless pipe, not welded; 3) Manufacturing process is cold-drawn or cold-rolled; 4) Circular cross-section. According to the General Rules for HS Classification, first determine heading 7304, then according to subheading provisions, cold-drawn or cold-rolled circular cross-section seamless pipes are classified under 730431. If further worked (such as threading, coating, etc.), it may affect classification. 730439 Other seamless steel pipes: 730439 is for other seamless steel pipes, including hot-rolled, hot-drawn, or non-circular cross-section seamless pipes. The difference from 730431 lies in the manufacturing process and cross-sectional shape. 730451 Cold-drawn other alloy steel seamless pipes: 730451 is for cold-drawn alloy steel seamless pipes, while 730431 is for cold-drawn non-alloy steel seamless pipes. The difference lies in whether the material is alloy steel. 730419 Other oil and gas drill pipes: 730419 is for oil and gas drill pipes, a special-purpose seamless pipe. If cold-drawn seamless steel pipes are used for drilling, they may be classified under this code, but must meet drill pipe standards. 730630 Other welded steel pipes: 730630 is for welded steel pipes, not seamless. The fundamental difference from 730431 is the manufacturing process: seamless vs. welded. Is it a seamless pipe? Is the manufacturing process cold-drawn or cold-rolled? Is the cross-section circular? Is the material non-alloy steel? Has it undergone further processing?
Basis
The core basis for classification is: 1) Material is iron or steel; 2) Seamless pipe, not welded; 3) Manufacturing process is cold-drawn or cold-rolled; 4) Circular cross-section. According to the General Rules for HS Classification, first determine heading 7304, then according to subheading provisions, cold-drawn or cold-rolled circular cross-section seamless pipes are classified under 730431. If further worked (such as threading, coating, etc.), it may affect classification.
Confused Codes：
730439 - Other seamless steel pipes
730439 is for other seamless steel pipes, including hot-rolled, hot-drawn, or non-circular cross-section seamless pipes. The difference from 730431 lies in the manufacturing process and cross-sectional shape.
730451 - Cold-drawn other alloy steel seamless pipes
730451 is for cold-drawn alloy steel seamless pipes, while 730431 is for cold-drawn non-alloy steel seamless pipes. The difference lies in whether the material is alloy steel.
730419 - Other oil and gas drill pipes
730419 is for oil and gas drill pipes, a special-purpose seamless pipe. If cold-drawn seamless steel pipes are used for drilling, they may be classified under this code, but must meet drill pipe standards.
730630 - Other welded steel pipes
730630 is for welded steel pipes, not seamless. The fundamental difference from 730431 is the manufacturing process: seamless vs. welded.
Self-Check：
✓ Is it a seamless pipe?
✓ Is the manufacturing process cold-drawn or cold-rolled?
✓ Is the cross-section circular?
✓ Is the material non-alloy steel?
✓ Has it undergone further processing?
❓ FAQ
How to inquire about the tariff rate for 730431? The latest tariff rates can be queried through the official website of the General Administration of Customs of China or the International Trade Single Window. Typically, you need to enter the HS code, select import/export type, country of origin, etc., and the system will display the MFN rate, general rate, VAT, etc. Note that rates may change; it is recommended to refer to the latest official announcement. What is the difference in classification between cold-drawn seamless steel pipes and hot-rolled seamless steel pipes? Cold-drawn seamless steel pipes are classified under 730431, and hot-rolled seamless steel pipes under 730439. The key difference is the manufacturing process: cold drawing involves pulling through a die at room temperature, resulting in high dimensional accuracy; hot rolling involves rolling at high temperatures. Process certification is required during declaration. If cold-drawn seamless steel pipes are used for boilers, are they still classified under 730431? Boiler tubes have dedicated subheadings 730451 (cold-drawn alloy steel boiler tubes) and 730459 (other). If they are non-alloy steel cold-drawn boiler tubes, are they still classified under 730431? In fact, 730431 includes boiler tubes, oil pipes, etc., but if they meet specific standards (such as GB3087), they may be classified under 730451, etc. It is recommended to confirm based on material and use. How to fill in specifications and models during declaration? Specifications and models should include outer diameter, wall thickness, and length, such as 'outer diameter 50mm × wall thickness 3mm × length 6000mm'. If there are other parameters such as material, standard, etc., they should also be indicated. Ensure consistency with contract and invoice to avoid customs questions. What is the difference between 730431 and 730441? 730441 is for cold-drawn stainless steel seamless pipes, while 730431 is for non-alloy steel cold-drawn seamless pipes. The difference lies in the material: stainless steel vs. non-alloy steel. Stainless steel pipes are classified under 7304.41 and subsequent subheadings. What documents are required for importing cold-drawn seamless steel pipes? Typically, contracts, invoices, packing lists, bills of lading, certificates of origin, quality certificates, etc., are required. If anti-dumping is involved, relevant proof is also needed. It is recommended to consult a customs broker or customs in advance. If cold-drawn seamless steel pipes are galvanized, does the code change? If galvanized or coated, they may be classified under 7306 (other steel pipes) or still under 7304? According to classification rules, galvanized pipes are usually classified under 7306 because the coating changes the surface characteristics. But if only cold-drawn then galvanized, they may still be classified under 7304? It is recommended to analyze specifically. How to determine if it is alloy steel? According to the HS definition, alloy steel must contain a certain proportion of other elements (such as chromium, nickel, molybdenum, etc.) and exceed the limits for non-alloy steel. Common non-alloy steels include carbon steel, and alloy steels include stainless steel, chrome-molybdenum steel. Refer to material reports or standards.
Q: How to inquire about the tariff rate for 730431?
A: The latest tariff rates can be queried through the official website of the General Administration of Customs of China or the International Trade Single Window. Typically, you need to enter the HS code, select import/export type, country of origin, etc., and the system will display the MFN rate, general rate, VAT, etc. Note that rates may change; it is recommended to refer to the latest official announcement.
Q: What is the difference in classification between cold-drawn seamless steel pipes and hot-rolled seamless steel pipes?
A: Cold-drawn seamless steel pipes are classified under 730431, and hot-rolled seamless steel pipes under 730439. The key difference is the manufacturing process: cold drawing involves pulling through a die at room temperature, resulting in high dimensional accuracy; hot rolling involves rolling at high temperatures. Process certification is required during declaration.
Q: If cold-drawn seamless steel pipes are used for boilers, are they still classified under 730431?
A: Boiler tubes have dedicated subheadings 730451 (cold-drawn alloy steel boiler tubes) and 730459 (other). If they are non-alloy steel cold-drawn boiler tubes, are they still classified under 730431? In fact, 730431 includes boiler tubes, oil pipes, etc., but if they meet specific standards (such as GB3087), they may be classified under 730451, etc. It is recommended to confirm based on material and use.
Q: How to fill in specifications and models during declaration?
A: Specifications and models should include outer diameter, wall thickness, and length, such as 'outer diameter 50mm × wall thickness 3mm × length 6000mm'. If there are other parameters such as material, standard, etc., they should also be indicated. Ensure consistency with contract and invoice to avoid customs questions.
Q: What is the difference between 730431 and 730441?
A: 730441 is for cold-drawn stainless steel seamless pipes, while 730431 is for non-alloy steel cold-drawn seamless pipes. The difference lies in the material: stainless steel vs. non-alloy steel. Stainless steel pipes are classified under 7304.41 and subsequent subheadings.
Q: What documents are required for importing cold-drawn seamless steel pipes?
A: Typically, contracts, invoices, packing lists, bills of lading, certificates of origin, quality certificates, etc., are required. If anti-dumping is involved, relevant proof is also needed. It is recommended to consult a customs broker or customs in advance.
Q: If cold-drawn seamless steel pipes are galvanized, does the code change?
A: If galvanized or coated, they may be classified under 7306 (other steel pipes) or still under 7304? According to classification rules, galvanized pipes are usually classified under 7306 because the coating changes the surface characteristics. But if only cold-drawn then galvanized, they may still be classified under 7304? It is recommended to analyze specifically.
Q: How to determine if it is alloy steel?
A: According to the HS definition, alloy steel must contain a certain proportion of other elements (such as chromium, nickel, molybdenum, etc.) and exceed the limits for non-alloy steel. Common non-alloy steels include carbon steel, and alloy steels include stainless steel, chrome-molybdenum steel. Refer to material reports or standards.
⚠️ 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.