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

HS v2017 Code: 730511

About 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

HS code 730511 covers a specific type of steel pipe used in the oil and gas pipeline industry. These large-diameter, longitudinally welded pipes are essential components in the transportation of crude oil, natural gas, and other energy resources across vast distances. As a critical infrastructure for the global energy sector, the production and trade of these specialized pipes play a significant role in the broader economy.

Production process

The production of HS 730511 pipes involves a multi-step process. First, steel coils or plates are cut and formed into cylindrical shapes. These sections are then welded longitudinally using the submerged arc welding technique, which provides superior strength and integrity. The welded pipes undergo various quality control checks and may be coated or treated to enhance their corrosion resistance and durability.

Production inputs

The main inputs required for the production of HS 730511 pipes include high-quality steel, welding consumables, and specialized machinery. Steel mills produce the raw steel coils or plates that are the primary material input. Welding electrodes, fluxes, and shielding gases are also essential for the welding process. Additionally, the production requires specialized pipe-forming equipment, welding machines, and testing/inspection tools to ensure the pipes meet industry standards.

Production outputs

The primary output of HS 730511 is large-diameter steel pipes used in the construction and maintenance of oil and gas pipelines. These pipes are typically consumed by companies and contractors involved in the 271000 Manufacture of coke and refined petroleum products and 422100 Wholesale of solid, liquid and gaseous fuels and related products industries. The pipes may also be used in other infrastructure projects, such as water and sewage systems, where large-diameter, high-strength pipes are required.

Revisions to 730511

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 730511. The most recent 1 version of this code (730511) is in the HS v2022 system:

This page shows a legacy version of code 730511 ( HS v2017).

Family tree for 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

    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/v2017/730511'>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 --> D["<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 --> E["<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 --> F["<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 --> G["<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 --> 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>"]

    

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class C level6
class D level6
class E level6
class F level6
class G level6
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