Chapter 39 covers plastics and articles thereof, including polymers in primary forms, synthetic rubber, semi-finished products, and various plastic finished products. This chapter classifies plastics based on chemical composition, physical form, and use, and is a core chapter for classifying plastic products in international trade. Heading 3917 includes tubes, pipes, hoses, and fittings thereof, of plastics, such as joints, elbows, flanges, etc. This heading covers rigid and flexible tubes, but excludes plastic articles clearly used for other purposes or articles combined with other materials. The first 2 digits 39 represent Chapter 39, plastics and articles thereof. The 3rd-4th digits 17 represent heading 3917, i.e., tubes, pipes, and fittings thereof, of plastics. The 5th-6th digits 22 represent subheading 391722, specifically rigid tubes of polymers of propylene. Among them, subheading 22 is further limited to rigid and made of polymers of propylene (such as polypropylene). The product is a rigid tube made of polymers of propylene, meeting the definition of plastic tubes under heading 3917. Since the material is polymers of propylene and it is rigid, it is classified under 391722, rather than other plastic tubes (such as 391723 for rigid tubes of polymers of vinyl chloride) or hoses (391731).
Chapter
Chapter 39 covers plastics and articles thereof, including polymers in primary forms, synthetic rubber, semi-finished products, and various plastic finished products. This chapter classifies plastics based on chemical composition, physical form, and use, and is a core chapter for classifying plastic products in international trade.
Heading
Heading 3917 includes tubes, pipes, hoses, and fittings thereof, of plastics, such as joints, elbows, flanges, etc. This heading covers rigid and flexible tubes, but excludes plastic articles clearly used for other purposes or articles combined with other materials.
Digit Breakdown
The first 2 digits 39 represent Chapter 39, plastics and articles thereof. The 3rd-4th digits 17 represent heading 3917, i.e., tubes, pipes, and fittings thereof, of plastics. The 5th-6th digits 22 represent subheading 391722, specifically rigid tubes of polymers of propylene. Among them, subheading 22 is further limited to rigid and made of polymers of propylene (such as polypropylene).
Classification Basis
The product is a rigid tube made of polymers of propylene, meeting the definition of plastic tubes under heading 3917. Since the material is polymers of propylene and it is rigid, it is classified under 391722, rather than other plastic tubes (such as 391723 for rigid tubes of polymers of vinyl chloride) or hoses (391731).
📝 Declaration Elements
Product Name: The Chinese and English names of the declared goods should accurately reflect the material and form of the goods, such as 'rigid tube of polymers of propylene'. Material: Specific polymer type, such as polypropylene (PP), propylene copolymer, etc., must be consistent with the propylene polymer in the HS code. Type: The type of tube, such as seamless tube, welded tube, etc., and whether it is rigid. Appearance: Describe the color, shape, cross-sectional shape (round, rectangular, etc.) and surface treatment of the tube. Specifications and Dimensions: Including outer diameter, inner diameter, wall thickness, length, etc., usually expressed in millimeters or meters. Use: Explain the specific use of the tube, such as for water supply and drainage, chemical industry, electrical, etc. Brand: If there is a brand, declare the brand name; if no brand, indicate 'no brand'. Model: The model or item number of the product for easy identification. Product Name: Rigid tube of polymers of propylene; Material: Polypropylene (PP); Type: Rigid seamless tube; Appearance: Round, white, smooth surface; Specifications and Dimensions: Outer diameter 50mm, inner diameter 40mm, wall thickness 5mm, length 4m; Use: For chemical pipelines; Brand: No brand; Model: PP-50. Mistakenly classifying rigid tubes of polymers of propylene under 391723 (of polymers of vinyl chloride), leading to incorrect tax rates and regulatory conditions. Inaccurately declaring the material, such as mistakenly reporting polypropylene as polyethylene, affecting classification. Ignoring the 'rigid' condition and mistakenly classifying hoses under this code.
Product Name
The Chinese and English names of the declared goods should accurately reflect the material and form of the goods, such as 'rigid tube of polymers of propylene'.
⚠️ Only writing 'plastic tube' without indicating the material and rigid characteristics.
Material
Specific polymer type, such as polypropylene (PP), propylene copolymer, etc., must be consistent with the propylene polymer in the HS code.
⚠️ Writing 'plastic' generically or mistakenly writing polyethylene.
Type
The type of tube, such as seamless tube, welded tube, etc., and whether it is rigid.
⚠️ Not indicating rigid, or mistakenly reporting as hose.
Appearance
Describe the color, shape, cross-sectional shape (round, rectangular, etc.) and surface treatment of the tube.
⚠️ Description too simple, such as only writing 'white'.
Specifications and Dimensions
Including outer diameter, inner diameter, wall thickness, length, etc., usually expressed in millimeters or meters.
⚠️ Omitting wall thickness or unclear length units.
Use
Explain the specific use of the tube, such as for water supply and drainage, chemical industry, electrical, etc.
⚠️ Use description too broad, such as 'industrial use'.
Brand
If there is a brand, declare the brand name; if no brand, indicate 'no brand'.
⚠️ Confusing brand with manufacturer.
Model
The model or item number of the product for easy identification.
⚠️ Incomplete model filling or inconsistent with the actual product.
Example： Product Name: Rigid tube of polymers of propylene; Material: Polypropylene (PP); Type: Rigid seamless tube; Appearance: Round, white, smooth surface; Specifications and Dimensions: Outer diameter 50mm, inner diameter 40mm, wall thickness 5mm, length 4m; Use: For chemical pipelines; Brand: No brand; Model: PP-50.
Common Mistakes：
Mistakenly classifying rigid tubes of polymers of propylene under 391723 (of polymers of vinyl chloride), leading to incorrect tax rates and regulatory conditions.
Inaccurately declaring the material, such as mistakenly reporting polypropylene as polyethylene, affecting classification.
Ignoring the 'rigid' condition and mistakenly classifying hoses under this code.
🎯 Classification Logic
The core basis for classification is: 1. Material is polymers of propylene (such as polypropylene); 2. Form is rigid tube; 3. Belongs to plastic tubes and fittings. All three conditions must be met to classify under 391722. 391723 Rigid tubes of polymers of vinyl chloride: Different material, 391723 is polymers of vinyl chloride (such as PVC), while 391722 is polymers of propylene. 391731 Plastic hoses: 391731 is hoses, which can withstand certain pressure, while 391722 is rigid tubes, which cannot bend. 391739 Other plastic tubes: 391739 covers plastic tubes not elsewhere specified, such as rigid tubes of other polymers, while 391722 specifically refers to those of polymers of propylene. 391740 Plastic tube fittings: 391740 is tube fittings (such as joints), while 391722 is the tube itself. Is the material polymers of propylene? Is it a rigid tube? Does it belong to plastic tubes? Is it confused with adjacent codes in material or form? Are the declaration elements complete and accurate?
Basis
The core basis for classification is: 1. Material is polymers of propylene (such as polypropylene); 2. Form is rigid tube; 3. Belongs to plastic tubes and fittings. All three conditions must be met to classify under 391722.
Confused Codes：
391723 - Rigid tubes of polymers of vinyl chloride
Different material, 391723 is polymers of vinyl chloride (such as PVC), while 391722 is polymers of propylene.
391731 - Plastic hoses
391731 is hoses, which can withstand certain pressure, while 391722 is rigid tubes, which cannot bend.
391739 - Other plastic tubes
391739 covers plastic tubes not elsewhere specified, such as rigid tubes of other polymers, while 391722 specifically refers to those of polymers of propylene.
391740 - Plastic tube fittings
391740 is tube fittings (such as joints), while 391722 is the tube itself.
Self-Check：
✓ Is the material polymers of propylene?
✓ Is it a rigid tube?
✓ Does it belong to plastic tubes?
✓ Is it confused with adjacent codes in material or form?
✓ Are the declaration elements complete and accurate?
❓ FAQ
How to distinguish between rigid tubes of polymers of propylene and rigid tubes of polymers of vinyl chloride? Mainly by material: polymers of propylene (such as PP) and polymers of vinyl chloride (such as PVC) can be identified by combustion method, density method, or infrared spectroscopy. HS codes differ: 391722 for polymers of propylene, 391723 for polymers of vinyl chloride. How should rigid tubes of polymers of propylene be classified if they have fittings? If the tube and fittings are declared together and the fittings are of plastic, they are usually classified as tubes; if the fittings are declared separately, they are classified under 391740. If the fittings are of other materials, they must be classified separately. What is the difference in HS codes between rigid tubes of polymers of propylene and hoses? Rigid tubes are classified under 391722, hoses under 391731. The difference is that rigid tubes cannot bend, while hoses can bend and withstand certain pressure. When declaring, indicate rigid or flexible. Are there special regulations for rigid tubes of polymers of propylene used for food contact? Yes, plastic tubes used for food contact may need to comply with food contact material regulations, such as FDA or EU standards. When declaring, relevant compliance statements must be provided, but the HS code remains unchanged. Are the HS codes for rigid tubes of polymers of propylene and rigid tubes of polyethylene the same? No. Rigid tubes of polyethylene are classified under 391721, those of polymers of propylene under 391722. Different materials, different codes. In the declaration elements for rigid tubes of polymers of propylene, how should specifications and dimensions be filled? Fill in outer diameter, inner diameter, wall thickness, and length, usually in millimeters and meters. For example: outer diameter 50mm, inner diameter 40mm, wall thickness 5mm, length 4m. Does surface treatment affect the classification of rigid tubes of polymers of propylene? Generally not, as long as the material and form remain unchanged. However, if combined with other materials or clearly used for other purposes, it may affect classification. How to check the latest tax rate for rigid tubes of polymers of propylene? You can check the latest tax rate by entering HS code 391722 on the General Administration of Customs website, International Trade Single Window, or professional tariff inquiry platforms. Tax rates may change, so the rate at the time of inquiry shall prevail.
Q: How to distinguish between rigid tubes of polymers of propylene and rigid tubes of polymers of vinyl chloride?
A: Mainly by material: polymers of propylene (such as PP) and polymers of vinyl chloride (such as PVC) can be identified by combustion method, density method, or infrared spectroscopy. HS codes differ: 391722 for polymers of propylene, 391723 for polymers of vinyl chloride.
Q: How should rigid tubes of polymers of propylene be classified if they have fittings?
A: If the tube and fittings are declared together and the fittings are of plastic, they are usually classified as tubes; if the fittings are declared separately, they are classified under 391740. If the fittings are of other materials, they must be classified separately.
Q: What is the difference in HS codes between rigid tubes of polymers of propylene and hoses?
A: Rigid tubes are classified under 391722, hoses under 391731. The difference is that rigid tubes cannot bend, while hoses can bend and withstand certain pressure. When declaring, indicate rigid or flexible.
Q: Are there special regulations for rigid tubes of polymers of propylene used for food contact?
A: Yes, plastic tubes used for food contact may need to comply with food contact material regulations, such as FDA or EU standards. When declaring, relevant compliance statements must be provided, but the HS code remains unchanged.
Q: Are the HS codes for rigid tubes of polymers of propylene and rigid tubes of polyethylene the same?
A: No. Rigid tubes of polyethylene are classified under 391721, those of polymers of propylene under 391722. Different materials, different codes.
Q: In the declaration elements for rigid tubes of polymers of propylene, how should specifications and dimensions be filled?
A: Fill in outer diameter, inner diameter, wall thickness, and length, usually in millimeters and meters. For example: outer diameter 50mm, inner diameter 40mm, wall thickness 5mm, length 4m.
Q: Does surface treatment affect the classification of rigid tubes of polymers of propylene?
A: Generally not, as long as the material and form remain unchanged. However, if combined with other materials or clearly used for other purposes, it may affect classification.
Q: How to check the latest tax rate for rigid tubes of polymers of propylene?
A: You can check the latest tax rate by entering HS code 391722 on the General Administration of Customs website, International Trade Single Window, or professional tariff inquiry platforms. Tax rates may change, so the rate at the time of inquiry shall prevail.
⚠️ 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.