HS code · 6-digit subheading
HS Code 7307.21 – Steel, stainless; tube or pipe fittings, flanges, of stainless steel
HS code 7307.21 is the 6-digit subheading for steel, stainless, tube or pipe fittings, flanges, of stainless steel. It is used for stainless steel weld neck flanges, stainless steel slip-on flanges, stainless steel blind flanges, stainless steel threaded flanges and stainless steel lap joint flanges.
What HS 7307.21 covers
This HS code specifically covers flanges made from stainless steel, which are critical components for connecting pipes, valves, pumps, and other equipment to form a piping system. Stainless steel flanges are highly valued for their exceptional corrosion resistance, high-temperature performance, and hygienic properties, making them indispensable in demanding industries such as chemical processing, petrochemicals, food and beverage, pharmaceuticals, and marine applications. Importers are typically engineering firms, industrial manufacturers, and specialized distributors globally, seeking durable and reliable connections for critical infrastructure. Exporters are often found in countries with advanced metallurgical and manufacturing capabilities. Key trade considerations include material grade (e.g., 304, 316), pressure class (e.g., ANSI, DIN), facing type, and compliance with international standards for safety and performance.
- Covers
- Stainless steel weld neck flanges
- Stainless steel slip-on flanges
- Stainless steel blind flanges
- Stainless steel threaded flanges
- Stainless steel lap joint flanges
- Stainless steel socket weld flanges
- Stainless steel orifice flanges
- Examples
- Metalfar stainless steel flanges
- BFE Group stainless steel flanges
- Sandvik stainless steel flanges
- Outokumpu stainless steel components
Codes often confused with 7307.21
Common mistake. Can be confused with flanges made from other materials like carbon steel (730791) or with other types of stainless steel fittings (730729) if the specific 'flange' characteristic is overlooked.
Top exporters and importers of HS code 730721, 2025
In 2025, the largest exporter of HS code 730721 in UN Comtrade data was China, with 27% of world exports; the largest importer in UN Comtrade data was the United States, with 11% 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 $457M 27% of world exports
- 2 India $252M 15% of world exports
- 3 Italy $180M 11% of world exports
World total: $1.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $214M 11% of world imports
- 2 Germany $179M 9.5% of world imports
- 3 Netherlands $114M 6.0% of world imports
World total: $1.9B 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 7307.21
Brazil does not split HS 7307.21: its NCM code is 7307.21.00.
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 7307.21
What is HS code 730721?
HS code 730721 is a 6-digit subheading in the Harmonized System that covers: Steel, stainless; tube or pipe fittings, flanges, of stainless steel. This HS code specifically covers flanges made from stainless steel, which are critical components for connecting pipes, valves, pumps, and other equipment to form a piping system. Stainless steel flanges are highly valued for their exceptional corrosion resistance, high-temperature performance, and hygienic properties, making them indispensable in demanding industries such as chemical processing, petrochemicals, food and beverage, pharmaceuticals, and marine applications. Importers are typically engineering firms, industrial manufacturers, and specialized distributors globally, seeking durable and reliable connections for critical infrastructure. Exporters are often found in countries with advanced metallurgical and manufacturing capabilities. Key trade considerations include material grade (e.g., 304, 316), pressure class (e.g., ANSI, DIN), facing type, and compliance with international standards for safety and performance.
What products fall under HS code 730721?
Stainless steel weld neck flanges, stainless steel slip-on flanges, stainless steel blind flanges, stainless steel threaded flanges, stainless steel lap joint flanges, stainless steel socket weld flanges, stainless steel orifice flanges
What are common misclassifications for HS code 730721?
Can be confused with flanges made from other materials like carbon steel (730791) or with other types of stainless steel fittings (730729) if the specific 'flange' characteristic is overlooked.
Which countries are the top exporters of goods under HS code 730721?
In 2025, the top exporters of HS code 730721 in UN Comtrade data were China ($457M, 27% of world exports), India ($252M) and Italy ($180M). World exports came to about $1.7B, 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 730721?
In 2025, the top importers of HS code 730721 in UN Comtrade data were the United States ($214M, 11% of world imports), Germany ($179M) and the Netherlands ($114M). World imports came to about $1.9B, 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 730721 structured?
HS code 730721 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 (21) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730721?
In Brazil, HS code 730721 is NCM 7307.21.00. The last two digits are 00 because Brazil does not split this HS code further.