HS Code for Oilfield casing
Oilfield casing classified under HS code 730520 refers to iron or steel pipes that are not seamless—meaning they are typically welded—and possess an external diameter exceeding 406.4 mm (16 inches). These pipes are used to line the borehole of oil and gas wells to provide structural integrity and prevent the collapse of the wellbore. The classification is determined by three primary factors: the material (iron or steel), the manufacturing process (welded/non-seamless), and the specific dimensions (diameter > 406.4 mm). This code is part of Chapter 73, which covers articles of iron or steel, and specifically addresses large-diameter pipes used in the energy sector. The welding process used for these pipes, such as longitudinal or spiral welding, is a key identifier. Because these pipes are subjected to significant geological pressure, they must meet specific API (American Petroleum Institute) standards, yet for HS classification, the physical dimensions and the fact that they are not seamless are the most important criteria. This classification is distinct from smaller diameter pipes or those manufactured without a seam. The large diameter usually indicates use in the upper sections of a well where the casing must support the weight of subsequent strings and protect groundwater zones.
Products Included
- Longitudinal submerged arc welded (LSAW) casing
- Spiral welded casing for oil and gas wells
- Welded iron casing with diameter > 406.4mm
- Welded steel casing for deep well drilling
- Large diameter conductor pipe
Common Misclassification
This code is often confused with HS code 730429, which covers seamless casing. The primary difference is the manufacturing method. It is also confused with 730629, which covers welded casing with an external diameter of 406.4 mm or less. Accurate measurement of the outer diameter is essential for correct classification.
FAQ
What is the HS code for oilfield casing?
The HS code for welded oilfield casing with an external diameter exceeding 406.4 mm is 730520.
Is seamless casing included in this code?
No, seamless casing is classified under heading 7304, specifically 730429 for most oilfield applications.
Industry
Frequently Asked Questions
What is the HS code for Oilfield casing?
The HS code for Oilfield casing is 730520 (Iron or steel (excluding cast iron); casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm).
How do I classify Oilfield casing for customs?
Oilfield casing is classified under HS code 730520 — Iron or steel (excluding cast iron); casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm. This is a 6-digit subheading level code.
Is the HS code for Oilfield casing the same in all countries?
The base HS code 730520 for Oilfield casing is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.