Chapter 39 covers plastics and articles thereof, including plastics in primary forms, waste and scrap, semi-manufactures, and various plastic finished products. This chapter is divided into two subchapters: the first subchapter covers plastics in primary forms, and the second subchapter covers waste and scrap and articles. 3917 belongs to the second subchapter, specifically concerning tubes, pipes, and fittings thereof, of plastics. This chapter covers a wide range of goods, from raw materials to finished products, and is an important category of chemical products in international trade. Heading 3917 includes tubes, pipes, and hoses, and fittings therefor, such as joints, elbows, flanges, etc., of plastics. However, it should be noted that this heading only covers tubes and pipes of plastics and does not include tubes and pipes of other materials (such as rubber or metal). In addition, heading 3917 is further subdivided based on whether the tubes are rigid or flexible, whether they are reinforced, and whether they have fittings. Subheading 391732 specifically refers to flexible tubes of plastics, not reinforced, i.e., tubes made solely of plastics, not reinforced with any other material, and having flexibility. Code 391732 has 6 digits: the first 2 digits "39" represent Chapter 39 (Plastics and articles thereof); digits 3-4 "17" represent heading 3917 (Tubes, pipes, and hoses, and fittings therefor, of plastics); digits 5-6 "32" represent subheading 391732, i.e., other flexible tubes of plastics, not reinforced. Specifically, the 5th digit "3" indicates subheading 39173 (flexible tubes), and the 6th digit "2" indicates the further subdivision thereunder, "other flexible tubes of plastics, not reinforced." Therefore, this code fully describes goods as tubes of plastics, flexible, and not reinforced. The goods are flexible tubes of plastics, not reinforced with any material, meeting the description of subheading 391732. If the tubes are reinforced (e.g., reinforced with fibers or metal wire), they should be classified under 391731 (reinforced flexible tubes); if they are rigid tubes, they should be classified under 391721-391729. Therefore, based on material, flexibility, and whether reinforced, they are correctly classified under 391732.

Product Name: The specific name of the declared goods, such as "plastic hose," "PVC flexible tube," etc., which should accurately reflect the characteristics of the goods. Material: Clearly identify the type of plastic, such as polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), etc., and preferably indicate the composition content. Whether Reinforced: State whether it has been reinforced, such as with fibers, metal wire, etc. This code requires "not reinforced." Whether Flexible: Indicate whether the tube is flexible, which can be determined by a bending test. This code requires "flexible." Use: Explain the specific use of the tube, such as conveying liquids, gases, protecting cables, etc. Appearance: Describe the color of the tube, cross-sectional shape (round, flat, etc.), whether it has fittings, etc. Specifications and Dimensions: Provide information such as inner diameter, outer diameter, wall thickness, length, and pressure rating (if any). Brand: Declare the brand name; if no brand, indicate "no brand." Product Name: PVC flexible hose; Material: polyvinyl chloride (PVC) 100%; Whether Reinforced: not reinforced; Whether Flexible: flexible; Use: for conveying water; Appearance: gray round tube, no fittings; Specifications and Dimensions: inner diameter 10mm, outer diameter 14mm, wall thickness 2mm, length 50m/roll; Brand: no brand. Failure to explicitly declare "not reinforced," resulting in classification under reinforced tube codes. Incorrectly declaring rigid tubes as flexible tubes, causing classification errors. Material description not specific, only writing "plastic," affecting classification.

The core basis for classification is: 1) the material is plastic; 2) the tube is flexible; 3) it is not reinforced with any material. It is also necessary to confirm whether it has fittings; if it has fittings, it is still classified under 3917, but this may affect subheading determination. According to the Import and Export Tariff and its notes, 391732 applies only to flexible tubes of plastics, not reinforced. If the tube is reinforced, it is classified under 391731; if it is a rigid tube, it is classified under 391721-391729. 391731 Flexible tubes of plastics, reinforced: This code applies to reinforced flexible tubes of plastics, such as those reinforced with fibers, metal wire, etc. 391732 requires non-reinforcement. 391721 Rigid tubes of polymers of ethylene: This code applies to rigid tubes that cannot be bent. 391732 is for flexible tubes that can be bent. 391739 Other tubes of plastics: This code is a residual subheading for other plastic tubes not elsewhere specified, but 391732 explicitly covers non-reinforced flexible tubes, which should be given priority. 400932 Reinforced tubes of rubber: The material is rubber and reinforced, different from plastic tubes. 830710 Hoses of base metal: The material is base metal, such as stainless steel hose, different from plastic tubes. Is the material plastic? Is it flexible? Is it not reinforced? Does it have fittings? Is it for a specific use requiring classification under another code?

How to determine whether a plastic tube is "reinforced"? Reinforcement usually refers to adding reinforcing materials such as fibers, metal wire, or fabric into the plastic tube to increase strength. If the tube is made solely of plastic without reinforcement from other materials, it is non-reinforced. This can be confirmed by observing the cross-section or checking the product description. How to distinguish flexible tubes from rigid tubes? Flexible tubes can be bent and are typically used in applications requiring movement or bending; rigid tubes are harder and not easily bent. This can be determined by a simple bending test; if it bends easily and does not spring back, it is flexible. What is the main difference between 391732 and 391731? 391732 is for non-reinforced flexible tubes, and 391731 is for reinforced flexible tubes. The key difference is whether reinforcement treatment has been applied. Reinforced tubes typically have higher pressure resistance. If a plastic tube has fittings, which code should it be classified under? Plastic tubes with fittings are still classified under 3917, but the appropriate subheading should be determined based on the characteristics of the tube itself. If the tube is a non-reinforced flexible tube, it is classified under 391732, and the fittings do not affect classification. How to check the import tariff rate for 391732? The latest tariff rate can be checked through the General Administration of Customs website, China International Trade Single Window, or by consulting a customs broker. Tariff rates may change due to country, trade agreements, etc., and actual inquiries shall prevail. Does 391732 apply to flexible tubes of all plastic materials? Yes, as long as the material is plastic, flexible, and non-reinforced, regardless of the specific type of plastic (such as PE, PVC, PP, etc.), it is classified under 391732. What are common errors in declaration? Common errors include: failure to indicate "non-reinforced," declaring rigid tubes as flexible tubes, non-specific material description, vague use description, etc. These may lead to classification errors or customs clearance delays. If the plastic tube is used in the medical or food sector, does it affect classification? Classification is mainly based on material and structure; use generally does not affect the HS code, but may involve other regulatory conditions (such as FDA, CE certification). It is necessary to ensure compliance with relevant regulations.