HS Code for Large diameter steel pipe

The classification of large diameter steel pipes under HS code 7305.19 is determined by several specific technical parameters defined in the Harmonized System's Chapter 73. According to the General Rules of Interpretation (GRI), specifically GRI 1 and 6, the classification is dictated by the terms of the headings and subheadings. For this code, the material must be iron or non-alloy steel, or alloy steel other than cast iron. Secondly, the external diameter is a critical threshold; it must exceed 406.4 mm (16 inches). Pipes with a smaller diameter are typically classified under heading 7306. Thirdly, the application is specific to line pipe used for oil or gas pipelines. Finally, the welding method distinguishes this code from others in the 7305 group. While 7305.11 covers longitudinally submerged arc welded pipes and 7305.12 covers other longitudinally welded pipes, 7305.19 is reserved for pipes that are not longitudinally welded. This most commonly refers to spirally welded (helical) pipes. The manufacturing process involves forming a steel strip into a hollow cylinder by winding it in a spiral and welding the edges together. This method allows for the production of very large diameters from relatively narrow steel strips. The structural integrity of these pipes is governed by international standards such as API 5L, which specifies the requirements for the gas and oil industry.

Products Included

• Spiral submerged arc welded (SSAW) steel pipes for gas transmission
• Helically welded iron pipes for oil pipelines exceeding 406.4mm diameter
• Non-longitudinally welded line pipes for offshore oil rigs
• Large diameter steel casing pipes with spiral seams

Common Misclassification

This code is frequently confused with 7305.11 and 7305.12. The primary difference lies in the weld seam orientation. 7305.11 is for longitudinal submerged arc welding, while 7305.12 is for other longitudinal welds (like ERW). If the pipe is seamless, it must be classified under 7304. Additionally, if the diameter is 406.4mm or less, heading 7306 applies regardless of the welding method. Misclassifying the welding type can lead to incorrect duty applications, especially in jurisdictions with trade remedies against specific welding processes.

FAQ

What is the HS code for Large diameter steel pipe?

The HS code for large diameter steel pipe (exceeding 406.4mm) used for oil or gas pipelines that is not longitudinally welded is 7305.19.

Does this code include stainless steel pipes?

Yes, provided they meet the diameter and application criteria and are not longitudinally welded, as 7305 covers both iron and steel (including alloy and stainless).