HS code · 6-digit subheading
HS Code 7307.91 – Iron or steel; tube or pipe fittings, flanges, other than stainless steel
HS code 7307.91 is the 6-digit subheading for iron or steel, tube or pipe fittings, flanges, other than stainless steel. It is used for carbon steel weld neck flanges, carbon steel slip-on flanges, carbon steel blind flanges, carbon steel threaded flanges and carbon steel lap joint flanges.
What HS 7307.91 covers
This HS code covers flanges made from iron or steel, excluding those made of stainless steel. This primarily includes carbon steel and alloy steel flanges, which are fundamental components for connecting pipes, valves, and equipment in a vast array of industrial and commercial piping systems. These flanges are chosen for their strength, durability, and cost-effectiveness, making them ubiquitous in sectors like oil and gas, water distribution, power generation, and general construction. Importers are typically engineering firms, industrial manufacturers, and large-scale distributors globally, seeking robust and reliable pipe connection solutions. Exporters are often found in countries with strong steel production and fabrication industries. Key trade considerations include material grade (e.g., A105, A350 LF2), pressure class (e.g., ANSI, DIN), facing type, and compliance with international standards like ASME B16.5.
- Covers
- Carbon steel weld neck flanges
- Carbon steel slip-on flanges
- Carbon steel blind flanges
- Carbon steel threaded flanges
- Carbon steel lap joint flanges
- Carbon steel socket weld flanges
- Alloy steel flanges
- Examples
- Forged Components Inc. carbon steel flanges
- Galperti carbon steel flanges
- Ulma Piping carbon steel flanges
- Tenaris carbon steel flanges
Codes often confused with 7307.91
Common mistake. Can be confused with stainless steel flanges (730721) if the material type is not accurately identified, or with other non-flange steel fittings (730799) if the specific 'flange' characteristic is overlooked.
Top exporters and importers of HS code 730791, 2025
In 2025, the largest exporter of HS code 730791 in UN Comtrade data was China, with 32% of world exports; the largest importer in UN Comtrade data was the United States, with 15% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $703M 32% of world exports
- 2 Italy $357M 16% of world exports
- 3 India $267M 12% of world exports
World total: $2.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $366M 15% of world imports
- 2 Saudi Arabia $163M 6.8% of world imports
- 3 Germany $134M 5.6% of world imports
World total: $2.4B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for 7307.91
Brazil does not split HS 7307.91: its NCM code is 7307.91.00.
All Brazil NCM codes in heading 73.07 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about HS 7307.91
What is HS code 730791?
HS code 730791 is a 6-digit subheading in the Harmonized System that covers: Iron or steel; tube or pipe fittings, flanges, other than stainless steel. This HS code covers flanges made from iron or steel, excluding those made of stainless steel. This primarily includes carbon steel and alloy steel flanges, which are fundamental components for connecting pipes, valves, and equipment in a vast array of industrial and commercial piping systems. These flanges are chosen for their strength, durability, and cost-effectiveness, making them ubiquitous in sectors like oil and gas, water distribution, power generation, and general construction. Importers are typically engineering firms, industrial manufacturers, and large-scale distributors globally, seeking robust and reliable pipe connection solutions. Exporters are often found in countries with strong steel production and fabrication industries. Key trade considerations include material grade (e.g., A105, A350 LF2), pressure class (e.g., ANSI, DIN), facing type, and compliance with international standards like ASME B16.5.
What products fall under HS code 730791?
Carbon steel weld neck flanges, carbon steel slip-on flanges, carbon steel blind flanges, carbon steel threaded flanges, carbon steel lap joint flanges, carbon steel socket weld flanges, alloy steel flanges
What are common misclassifications for HS code 730791?
Can be confused with stainless steel flanges (730721) if the material type is not accurately identified, or with other non-flange steel fittings (730799) if the specific 'flange' characteristic is overlooked.
Which countries are the top exporters of goods under HS code 730791?
In 2025, the top exporters of HS code 730791 in UN Comtrade data were China ($703M, 32% of world exports), Italy ($357M) and India ($267M). World exports came to about $2.2B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 730791?
In 2025, the top importers of HS code 730791 in UN Comtrade data were the United States ($366M, 15% of world imports), Saudi Arabia ($163M) and Germany ($134M). World imports came to about $2.4B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 730791 structured?
HS code 730791 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (07) identify the heading, and digits 5-6 (91) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730791?
In Brazil, HS code 730791 is NCM 7307.91.00. The last two digits are 00 because Brazil does not split this HS code further.