Chapter 73 covers articles of iron or steel, but excludes raw materials for iron and steel smelting (Chapter 72) and mechanical and electrical equipment (Chapter 84). This chapter includes tubes, profiles, structural members, containers, fasteners, etc. The core characteristic is that they are made of iron or steel and are not more specifically named in other chapters. Heading 7305 belongs to the steel pipe products in this chapter, specifically referring to circular cross-section steel pipes manufactured by other methods, distinguished from seamless steel pipes (7304) and welded steel pipes (7306). Heading 7305 covers circular cross-section iron or steel pipes manufactured by other methods (non-seamless, non-welded), such as cast pipes, riveted pipes, forged pipes, etc. It also includes hollow profiles of such pipes. They are mainly used for oil and gas transportation, structural support, mechanical processing, etc. Under this heading, they are further subdivided according to outer diameter and use. 730511 specifically refers to longitudinally submerged arc welded pipes for oil and gas pipelines with an outer diameter exceeding 406.4 mm. However, note: actually 730511 is longitudinally submerged arc welded pipe, which belongs to welded pipes, but heading 7305 is other methods? There is a contradiction here that needs correction: according to HS 2022, 7305 is other circular cross-section steel pipes (for example, longitudinally submerged arc welded), while 7306 is other welded pipes. In fact, 7305 includes longitudinally submerged arc welded pipes, while 7306 includes other welded pipes such as electric resistance welded. Therefore, 730511 is longitudinally submerged arc welded pipe, used for oil and gas, with an outer diameter >406.4 mm. First 2 digits 73: Chapter 73 articles of iron or steel. Digits 3-4 05: heading 7305, other circular cross-section steel pipes (such as longitudinally submerged arc welded), but excluding seamless pipes and ordinary welded pipes. Digits 5-6 11: subheading 730511, specifically longitudinally submerged arc welded pipes for oil and gas pipelines with an outer diameter exceeding 406.4 mm. This subheading is further distinguished from 730512 (other longitudinally submerged arc welded pipes), 730519 (other pipes for oil and gas pipelines), 730520 (other pipes for drilling), etc. The code is refined level by level: chapter -> heading -> subheading, ensuring precise classification. This commodity is an oil and gas pipeline, manufactured by the longitudinal submerged arc welding process, with an outer diameter usually exceeding 406.4 mm, meeting the description of 730511. If it were a seamless pipe, it should be classified under 7304; if it were another welded pipe such as electric resistance welded, it should be classified under 7306; if the outer diameter is <=406.4 mm, it may be classified under 730512 or others. Therefore, it needs to be determined comprehensively based on manufacturing process, use, and outer diameter.
Chapter
Chapter 73 covers articles of iron or steel, but excludes raw materials for iron and steel smelting (Chapter 72) and mechanical and electrical equipment (Chapter 84). This chapter includes tubes, profiles, structural members, containers, fasteners, etc. The core characteristic is that they are made of iron or steel and are not more specifically named in other chapters. Heading 7305 belongs to the steel pipe products in this chapter, specifically referring to circular cross-section steel pipes manufactured by other methods, distinguished from seamless steel pipes (7304) and welded steel pipes (7306).
Heading
Heading 7305 covers circular cross-section iron or steel pipes manufactured by other methods (non-seamless, non-welded), such as cast pipes, riveted pipes, forged pipes, etc. It also includes hollow profiles of such pipes. They are mainly used for oil and gas transportation, structural support, mechanical processing, etc. Under this heading, they are further subdivided according to outer diameter and use. 730511 specifically refers to longitudinally submerged arc welded pipes for oil and gas pipelines with an outer diameter exceeding 406.4 mm. However, note: actually 730511 is longitudinally submerged arc welded pipe, which belongs to welded pipes, but heading 7305 is other methods? There is a contradiction here that needs correction: according to HS 2022, 7305 is other circular cross-section steel pipes (for example, longitudinally submerged arc welded), while 7306 is other welded pipes. In fact, 7305 includes longitudinally submerged arc welded pipes, while 7306 includes other welded pipes such as electric resistance welded. Therefore, 730511 is longitudinally submerged arc welded pipe, used for oil and gas, with an outer diameter >406.4 mm.
Digit Breakdown
First 2 digits 73: Chapter 73 articles of iron or steel. Digits 3-4 05: heading 7305, other circular cross-section steel pipes (such as longitudinally submerged arc welded), but excluding seamless pipes and ordinary welded pipes. Digits 5-6 11: subheading 730511, specifically longitudinally submerged arc welded pipes for oil and gas pipelines with an outer diameter exceeding 406.4 mm. This subheading is further distinguished from 730512 (other longitudinally submerged arc welded pipes), 730519 (other pipes for oil and gas pipelines), 730520 (other pipes for drilling), etc. The code is refined level by level: chapter -> heading -> subheading, ensuring precise classification.
Classification Basis
This commodity is an oil and gas pipeline, manufactured by the longitudinal submerged arc welding process, with an outer diameter usually exceeding 406.4 mm, meeting the description of 730511. If it were a seamless pipe, it should be classified under 7304; if it were another welded pipe such as electric resistance welded, it should be classified under 7306; if the outer diameter is <=406.4 mm, it may be classified under 730512 or others. Therefore, it needs to be determined comprehensively based on manufacturing process, use, and outer diameter.
📝 Declaration Elements
Product name: The declared commodity name should accurately reflect the material and use, such as "longitudinally submerged arc welded oil and gas steel pipe". Material: The specific grade or composition of iron or steel, such as API 5L X70, carbon steel, etc. Manufacturing process: Clearly state longitudinal submerged arc welding (LSAW), distinguishing it from seamless, electric resistance welded, etc. Outer diameter: The outer diameter size of the pipe, in millimeters, must exceed 406.4 mm. Use: Clearly state that it is used for oil and gas pipeline transportation. Length: The length of the pipe, usually fixed length or random length. Wall thickness: The wall thickness of the pipe, which affects pressure-bearing capacity. Product name: longitudinally submerged arc welded oil and gas steel pipe; Material: API 5L X70; Manufacturing process: longitudinal submerged arc welding; Outer diameter: 610 mm; Wall thickness: 12.7 mm; Length: 12 m; Use: oil and gas transportation pipeline. Mistakenly classifying longitudinally submerged arc welded pipes under 7306 (other welded pipes). Declaring 730511 when the outer diameter does not exceed 406.4 mm. Incorrectly classifying under this code when the use is not oil and gas.
Product name
The declared commodity name should accurately reflect the material and use, such as "longitudinally submerged arc welded oil and gas steel pipe".
⚠️ Only writing "steel pipe" or "pipeline", which is too general.
Material
The specific grade or composition of iron or steel, such as API 5L X70, carbon steel, etc.
⚠️ Only writing "steel" without specifying the specific steel grade.
Manufacturing process
Clearly state longitudinal submerged arc welding (LSAW), distinguishing it from seamless, electric resistance welded, etc.
⚠️ Mistakenly writing "welded pipe" without specifying submerged arc welding.
Outer diameter
The outer diameter size of the pipe, in millimeters, must exceed 406.4 mm.
⚠️ Failing to provide the outer diameter or using the wrong unit.
Use
Clearly state that it is used for oil and gas pipeline transportation.
⚠️ Writing "transportation pipeline" without specifying oil and gas.
Length
The length of the pipe, usually fixed length or random length.
⚠️ Ignoring the declaration of length.
Wall thickness
The wall thickness of the pipe, which affects pressure-bearing capacity.
⚠️ Failing to provide wall thickness.
Example： Product name: longitudinally submerged arc welded oil and gas steel pipe; Material: API 5L X70; Manufacturing process: longitudinal submerged arc welding; Outer diameter: 610 mm; Wall thickness: 12.7 mm; Length: 12 m; Use: oil and gas transportation pipeline.
Declaring 730511 when the outer diameter does not exceed 406.4 mm.
Incorrectly classifying under this code when the use is not oil and gas.
🎯 Classification Logic
Core basis for classification: 1) The material is iron or steel; 2) circular cross-section; 3) the manufacturing process is longitudinal submerged arc welding; 4) the outer diameter exceeds 406.4 mm; 5) it is specially used for oil and gas pipelines. At the same time, seamless pipes (7304) and other welded pipes (7306) must be excluded. If any condition is not met, classify under the adjacent code. 730512 Other longitudinally submerged arc welded pipes: 730512 is other longitudinally submerged arc welded pipes, not limited to oil and gas, and the outer diameter may exceed 406.4 mm. If the use is not oil and gas, classify here. 730519 Other pipes for oil and gas pipelines: 730519 is other pipes for oil and gas pipelines, but the manufacturing process is not longitudinal submerged arc welding, such as seamless or electric resistance welded. 7306 Other welded pipes: 7306 covers other welded pipes, such as electric resistance welded, spiral welded, etc., but excludes longitudinal submerged arc welded. 7304 Seamless pipes: 7304 is seamless steel pipes, made by rolling or drawing, without welds. Is it longitudinally submerged arc welded? Is the outer diameter >406.4 mm? Is it used for oil and gas? Is the material iron or steel? Are seamless and other welded pipes excluded?
Basis
Core basis for classification: 1) The material is iron or steel; 2) circular cross-section; 3) the manufacturing process is longitudinal submerged arc welding; 4) the outer diameter exceeds 406.4 mm; 5) it is specially used for oil and gas pipelines. At the same time, seamless pipes (7304) and other welded pipes (7306) must be excluded. If any condition is not met, classify under the adjacent code.
Confused Codes：
730512 - Other longitudinally submerged arc welded pipes
730512 is other longitudinally submerged arc welded pipes, not limited to oil and gas, and the outer diameter may exceed 406.4 mm. If the use is not oil and gas, classify here.
730519 - Other pipes for oil and gas pipelines
730519 is other pipes for oil and gas pipelines, but the manufacturing process is not longitudinal submerged arc welding, such as seamless or electric resistance welded.
7306 - Other welded pipes
7306 covers other welded pipes, such as electric resistance welded, spiral welded, etc., but excludes longitudinal submerged arc welded.
7304 - Seamless pipes
7304 is seamless steel pipes, made by rolling or drawing, without welds.
Self-Check：
✓ Is it longitudinally submerged arc welded?
✓ Is the outer diameter >406.4 mm?
✓ Is it used for oil and gas?
✓ Is the material iron or steel?
✓ Are seamless and other welded pipes excluded?
❓ FAQ
How can I check the current tariff rate for 730511? You can check the most-favored-nation rate, general rate, value-added tax, and consumption tax by entering HS code 730511 on the official website of the General Administration of Customs of China, the International Trade Single Window, or a professional tariff inquiry platform. Note that tariff rates are adjusted, and the latest published rates shall prevail. What is the main difference between 730511 and 730512? 730511 is specifically used for oil and gas pipelines, longitudinally submerged arc welded pipes with an outer diameter >406.4 mm; 730512 is other longitudinally submerged arc welded pipes, not limited by use, and the outer diameter may be >406.4 mm. Use is the core distinguishing point. What special documents are required to declare 730511? Usually, a material certificate, manufacturing process statement, outer diameter size inspection report, and use declaration (such as API 5L certificate) are required. Some countries may require a certificate of origin, quality certificate, etc. If the pipe outer diameter is exactly 406.4 mm, which code should it be classified under? Subheading 730511 requires an outer diameter exceeding 406.4 mm. If it is exactly 406.4 mm, it does not meet "exceeding" and should be classified under 730512 or another corresponding subheading. Note that "exceeding" does not include equal to. What is the difference in classification between longitudinally submerged arc welded pipes and spiral submerged arc welded pipes? Longitudinally submerged arc welded pipes are classified under 7305. If spiral submerged arc welded pipes have an outer diameter >406.4 mm and are used for oil and gas, may they be classified under 7305? In fact, are spiral welded pipes classified under 7306? According to HS, 7305 includes longitudinal submerged arc welding, while spiral welded pipes belong to 7306. Therefore, they need to be distinguished according to the type of weld seam. For cross-border e-commerce sales of oil and gas pipelines, how should 730511 be used correctly? Cross-border e-commerce usually involves small batches, but if selling such large pipelines, they must be declared under general trade. Ensure the goods meet the description of 730511 and prepare complete declaration elements. Personal overseas online shopping does not apply. What is the export tax rebate rate for 730511? The export tax rebate rate changes with policy. You can check the latest rebate rate through the State Taxation Administration or the General Administration of Customs. Generally, the rebate rate for iron and steel products is relatively low, and the actual rate shall prevail. What are the consequences of mistakenly declaring 730511 as 7306? It may lead to incorrect classification, affecting tariffs, regulatory conditions, and tax rebates. Customs may require supplementary taxes, fines, or even affect the enterprise's credit. It is recommended to declare truthfully and apply for advance classification if necessary.
Q: How can I check the current tariff rate for 730511?
A: You can check the most-favored-nation rate, general rate, value-added tax, and consumption tax by entering HS code 730511 on the official website of the General Administration of Customs of China, the International Trade Single Window, or a professional tariff inquiry platform. Note that tariff rates are adjusted, and the latest published rates shall prevail.
Q: What is the main difference between 730511 and 730512?
A: 730511 is specifically used for oil and gas pipelines, longitudinally submerged arc welded pipes with an outer diameter >406.4 mm; 730512 is other longitudinally submerged arc welded pipes, not limited by use, and the outer diameter may be >406.4 mm. Use is the core distinguishing point.
Q: What special documents are required to declare 730511?
A: Usually, a material certificate, manufacturing process statement, outer diameter size inspection report, and use declaration (such as API 5L certificate) are required. Some countries may require a certificate of origin, quality certificate, etc.
Q: If the pipe outer diameter is exactly 406.4 mm, which code should it be classified under?
A: Subheading 730511 requires an outer diameter exceeding 406.4 mm. If it is exactly 406.4 mm, it does not meet "exceeding" and should be classified under 730512 or another corresponding subheading. Note that "exceeding" does not include equal to.
Q: What is the difference in classification between longitudinally submerged arc welded pipes and spiral submerged arc welded pipes?
A: Longitudinally submerged arc welded pipes are classified under 7305. If spiral submerged arc welded pipes have an outer diameter >406.4 mm and are used for oil and gas, may they be classified under 7305? In fact, are spiral welded pipes classified under 7306? According to HS, 7305 includes longitudinal submerged arc welding, while spiral welded pipes belong to 7306. Therefore, they need to be distinguished according to the type of weld seam.
Q: For cross-border e-commerce sales of oil and gas pipelines, how should 730511 be used correctly?
A: Cross-border e-commerce usually involves small batches, but if selling such large pipelines, they must be declared under general trade. Ensure the goods meet the description of 730511 and prepare complete declaration elements. Personal overseas online shopping does not apply.
Q: What is the export tax rebate rate for 730511?
A: The export tax rebate rate changes with policy. You can check the latest rebate rate through the State Taxation Administration or the General Administration of Customs. Generally, the rebate rate for iron and steel products is relatively low, and the actual rate shall prevail.
Q: What are the consequences of mistakenly declaring 730511 as 7306?
A: It may lead to incorrect classification, affecting tariffs, regulatory conditions, and tax rebates. Customs may require supplementary taxes, fines, or even affect the enterprise's credit. It is recommended to declare truthfully and apply for advance classification if necessary.
⚠️ 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.