What is the HSN code for SS 304 fitting?

What Is the HSN Code for SS 304 Fittings?

HSN, the Harmonized System of Nomenclature, is the international classification system for traded goods administered by the World Customs Organization. Stainless steel pipe fittings of grade 304 fall under heading 7307, Tube or pipe fittings of iron or steel, for example couplings, elbows and sleeves. Within heading 7307, the classification is further refined by the type of fitting and the manufacturing method.

Fitting type	HSN sub-heading	Category
Flanges	7307 21	Stainless steel flanges
Threaded fittings	7307 22	Elbows, bends and sleeves, threaded
Butt-welding fittings	7307 23	Elbows, tees and reducers, butt-welding
Other fittings	7307 29	Caps, crosses and specialized connectors

All four sub-headings apply to fittings made from SS 304; the grade of stainless steel does not change the code, but it must be stated on the commercial documents so that customs can confirm the stainless steel content.

Why Accurate Classification Matters

An incorrect HSN code directly affects cost and compliance. Depending on the classification, import duty rates may differ by 5-15%, customs clearance may be delayed by 3-10 days, and repeated errors can lead to fines or reclassification reviews. For example, declaring butt-welding fittings under a general steel heading instead of 7307 23 can raise the duty rate and trigger additional inspection because the stainless steel alloy content is no longer evident.

Pipes vs Fittings: 7304/7306 versus 7307

A frequent mistake is confusing the codes for pipes with the codes for fittings. 7304 and 7306 cover raw, hollow tubular products, seamless and welded respectively, that have not been further processed. 7307 covers components that have been shaped by bending, threading, forging or other processing to change flow direction or pipe diameter within a fluid system. When importing a complete system, pipes and fittings must be declared under their respective headings.

Global Consistency and National Extensions

The first six digits of the code are standardized worldwide and are identical in every country using the HS convention. Beyond six digits, national codes differ: India uses eight digits, the European Union uses the ten-digit TARIC code, and other countries apply their own extensions. The practical rule is to verify the first six digits against the WCO database and to confirm the national extension with the local customs authority of the destination country.

Practical Steps for Correct Classification

Confirm the material grade of the fitting, for example SS 304, from the mill test certificate.

Identify the fitting type and manufacturing method, such as forged butt-welding elbow or threaded coupling.

Verify the first six digits against the WCO HS database.

Apply the national extension required by the destination country and confirm it with the local customs office.

Keep the description on the commercial invoice consistent with the HSN code and the mill test certificate.

Frequently Asked Questions

If I use 304L instead of 304, will the HSN code change?

No. Both 304 and 304L fall under the stainless steel sub-headings of HSN 7307. The difference in carbon content is recorded in the mill test certificate but does not change the classification.

How can I verify the HSN code on a quotation?

Cross-check the first six digits against the World Customs Organization database. If a supplier uses a code other than 7307 for pipe fittings, ask for the technical justification.

Does the HSN code affect the final landed cost?

Yes. Customs duties, GST/VAT and clearance fees are calculated from the classification, and a wrong code can increase total cost by 10% or more in addition to causing delays.

Is the HSN code the same worldwide?

The first six digits are standardized globally as the HS code; the following digits vary by country, for example India uses eight digits. Always confirm the national extension with the local customs authority.

Is a pipe fitting always classified under 7307?

Yes if it is a fitting that changes flow direction or diameter, such as an elbow, tee, reducer, flange or coupling. Raw tubes and pipes belong to 7304 or 7306.

Do I need a mill test certificate for customs?

In most jurisdictions the commercial invoice must describe the goods accurately, and the mill test certificate supports the declared stainless steel grade and the correct sub-heading.