HS Code for Flexible high pressure tubing

Flexible high-pressure tubing made of plastics is classified under HS code 3917.31. This classification is found within Chapter 39, which covers plastics and articles thereof. Heading 3917 is dedicated to tubes, pipes, and hoses of plastics. The specific subheading 3917.31 is reserved for flexible tubes that have a minimum burst pressure of 27.6 MPa (approximately 4,000 psi). This technical threshold is the primary legal determinant for classification. These tubes are often reinforced with textile or metal braids to withstand extreme internal pressures while maintaining flexibility. According to the Chapter Notes for Chapter 39, "tubes, pipes and hoses" means hollow products, whether semi-manufactures or finished products, of a kind generally used for conveying, conducting or distributing gases or liquids. The high-pressure designation is critical for safety and industrial standards, and the classification reflects the specialized engineering required to meet the 27.6 MPa burst pressure requirement. If the tubing does not meet this specific pressure rating, it must be classified elsewhere within heading 3917.

Products Included

• High-pressure hydraulic plastic hoses
• Reinforced thermoplastic hoses for industrial gas
• Flexible plastic tubing with burst pressure > 27.6 MPa
• Pneumatic plastic hoses rated for high-pressure cycles
• Wire-reinforced flexible plastic pressure pipes

Common Misclassification

Flexible high-pressure tubing is often misclassified under 3917.39 (other flexible plastic hoses) if the burst pressure is not verified. It is also frequently confused with 4009.21 or 4009.22, which cover reinforced hoses made of vulcanized rubber. The material composition is the first check: if the hose is primarily plastic (thermoplastic), it belongs in 3917; if it is rubber, it belongs in 4009.

FAQ

What is the HS code for flexible high pressure tubing?

The HS code for flexible plastic tubing with a minimum burst pressure of 27.6 MPa is 3917.31.

Does this code include hoses with permanently attached fittings?

Yes, heading 3917 includes tubes, pipes, and hoses whether or not they are fitted with their own joints or attachments, provided they retain the character of tubing.