Iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), longitudinally welded, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)

HS v2022 Code: 730531

About iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), longitudinally welded, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)

HS code 730531 covers a specific type of iron or steel tubes and pipes that are longitudinally welded and have a circular cross-section with an external diameter exceeding 406.4mm. These products are widely used in various industrial applications, including construction, manufacturing, and infrastructure development. They play a crucial role in the global economy, supporting the transportation of fluids, gases, and other materials across a range of industries.

Production process

The production of the tubes and pipes covered under HS code 730531 typically involves a process of longitudinal welding. This process involves taking a flat steel or iron sheet and forming it into a cylindrical shape, then welding the seam along the length of the pipe. The welding can be done using various techniques, such as arc welding or laser welding, depending on the specific requirements of the product. After the welding process, the pipes may undergo additional finishing steps, such as cutting, threading, or coating, to meet the desired specifications.

Production inputs

The main inputs required for the production of the tubes and pipes under HS code 730531 include steel or iron sheets, welding equipment, and various tools and machinery for the fabrication and finishing processes. The quality and properties of the raw materials, such as the steel or iron alloy composition, thickness, and surface finish, are crucial in determining the final product characteristics. Additionally, energy sources, such as electricity or natural gas, are needed to power the welding and other production equipment.

Production outputs

The primary output of the industry covered by HS code 730531 is the longitudinally welded steel or iron tubes and pipes with a circular cross-section and an external diameter exceeding 406.4mm. These products are often used in a wide range of applications, including 730630 (Steel tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel), 730640 (Steel tubes, pipes and hollow profiles, welded, of iron (other than cast iron) or steel, of circular cross-section, of an external diameter exceeding 406.4 mm), and 730650 (Steel tubes, pipes and hollow profiles, welded, of iron (other than cast iron) or steel, of circular cross-section, of an external diameter not exceeding 406.4 mm).

Revisions to 730531

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 730531. The most recent 1 version of this code (730531) is in the HS v2022 system (this version):

This page shows the most recent version of code 730531.

Family tree for iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), longitudinally welded, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)

    graph LR
    A["<a href='/classifications/hs/v2022/73'>73: Iron or steel articles</a>"]
A --> B["<a href='/classifications/hs/v2022/7305'>7305: Iron or steel (excluding cast iron); tubes and pipes (e.g. welded, riveted or similarly closed), having circular cross-sections, external diameter of which exceeds 406.4mm, not seamless</a>"]
B --> C["<a href='/classifications/hs/v2022/730531'>730531: Iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), longitudinally welded, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)</a>"]

    B --> D["<a href='/classifications/hs/v2022/730511'>730511: Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), longitudinally submerged arc welded, having circular cross-sections, external diameter exceeds 406.4mm</a>"]
B --> E["<a href='/classifications/hs/v2022/730512'>730512: Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), longitudinally welded (not submerged arc welded), having circular cross-sections, external diameter exceeds 406.4mm</a>"]
B --> F["<a href='/classifications/hs/v2022/730519'>730519: Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm</a>"]
B --> G["<a href='/classifications/hs/v2022/730520'>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</a>"]
B --> H["<a href='/classifications/hs/v2022/730539'>730539: Iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), welded (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)</a>"]
B --> I["<a href='/classifications/hs/v2022/730590'>730590: Iron or steel (excluding cast iron); tubes and pipes n.e.c. in heading no. 7305, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)</a>"]

    

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