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 v2017 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 diverse sectors.

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 submerged arc welding or electric resistance welding, depending on the specific requirements of the product.

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 forming and shaping processes. Additionally, energy sources, such as electricity or natural gas, are needed to power the welding and other production equipment. The quality and properties of the raw materials, as well as the efficiency of the production equipment, are crucial factors in determining the final product's characteristics.

Production outputs

The tubes and pipes produced under HS code 730531 are primarily used in various industrial applications, such as construction, manufacturing, and infrastructure development. They may be used in the production of 730511 Iron or steel; line pipe of a kind used for oil or gas pipelines, seamless or 730512 Iron or steel; line pipe of a kind used for oil or gas pipelines, welded, which are classified under different HS codes. Additionally, these tubes and pipes may be further processed or incorporated into other products, such as 730520 Iron or steel; casing, tubing and drill pipe, of a kind used in drilling for oil or gas, 730610 Iron or steel; line pipe of a kind used for oil or gas pipelines, or 730619 Iron or steel; casing and tubing, of a kind used in drilling for oil or gas, other than seamless, depending on the specific application and industry requirements.

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 page shows a legacy version of code 730531 ( HS v2017).

Older versions

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/v2017/73'>73: Iron or steel articles</a>"]
A --> B["<a href='/classifications/hs/v2017/7305'>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/v2017/730531'>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/v2017/730511'>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/v2017/730512'>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/v2017/730519'>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/v2017/730520'>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/v2017/730539'>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/v2017/730590'>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>"]

    

    %% Color coordination by level

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level6
class D level6
class E level6
class F level6
class G level6
class H level6
class I level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight