Pipe Reducer HS Code

The HS code for a pipe reducer depends on its material and manufacturing process, and is usually classified under HS code 7307 (iron/steel) or 3917 (plastic). The main codes include 73079990 (iron/steel fittings), 73072300 (welded pipe fittings), and 39174000 (plastic fittings).

Common HS Codes for Pipe Reducers:

7307: Tube or pipe fittings (joints, elbows, sleeves) of iron or steel.
73079990: Other iron/steel fittings (e.g., carbon steel, stainless steel).
73072300: Butt welding fittings (e.g., eccentric/concentric reducers).
73079390: Butt welding fittings.
73072900: Other Stainless Steel fittings.
73071120: Sg iron cast fittings.

39174000: Fittings for tubes, pipes, and hoses, of Plastics.

Examples of Actual Declaration Codes by Country:

1. US Import Codes

US Customs uses HTS codes. Common codes for reducers include:
7307.99 (Other steel pipe fittings)
8481.90 (Valves and similar appliance parts; some reducers may fall under this category)

2. EU/Turkey Codes

Plastic reducers: 3917.4000
Stainless steel threaded reducers: 7307.2200
Steel weld neck reducers: 7307.9390

3. China Declaration Related

According to Chinese Customs classification information, pipe fittings (including reducers) are mainly classified under Chapter 73 (Steel Products) or Chapter 39 (Plastic Products).
Steel reducers: Usually classified under 7307, requiring further subdivision based on specific material (stainless steel/other steel) and processing method (cast/non-cast).
Steel-plastic composite reducers: Require determination based on the basic material, usually classified under the corresponding steel or plastic code.
Plastic reducers: Classified under 3917.40 (Plastic pipe fittings).

7304191000: Applicable to seamless steel reducers (excluding cast iron) for oil or natural gas with an outer diameter between 215.9 mm and 406.4 mm.
7304192000: Applicable to seamless steel reducers (excluding cast iron) for oil or natural gas with an outer diameter between 114.3 mm and 215.9 mm.
7304199000: Applicable to other seamless steel pipes (outer diameters not within the above ranges). If the reducer falls into this category and meets the description, this code may also be used as a reference.

Specific priority considerations: 

For butt-welded connections → 7307930000; 

For seamless steel pipe fittings → Select 7304191000 or 7304192000 based on outer diameter; 

For alloy steel, stainless steel, or special-purpose pipes, further verification of the product description is required.

Information Required for Customs Declaration:

When declaring pipe reducers (using stainless steel as an example), you need to provide the following details:

Material: Clearly specified as "stainless steel"
Type: Reducer
Processing method: Forging/casting/welding, etc.
Application: For pipe connection
Specifications: Diameter dimensions at both ends (e.g., 1" x 3/4")
Connection method: Threaded/butt-welded/socket-welded/flange type, etc.

Brand type: Own brand/foreign brand, etc.

Export preferential treatment: Whether it enjoys preferential tariffs.

Frequently Asked Questions (FAQ)

Q1: What is the difference between HS code and HTS code?
A: HS (Harmonized System) codes are international (first 6 digits). HTS (Harmonized Tariff Schedule) codes are US-specific (up to 10 digits) for import duties. The first 6 digits are usually the same.

Q2: Does the HS code change for concentric vs. eccentric reducers?
A: No. Both share the same HS code because the shape does not determine tariff classification. The key factors are material and manufacturing process.

Q3: Do I need to provide the HS code when importing reducers?
A: Yes. The HS code is required for customs clearance in most countries. It determines import duties and allows customs to process your shipment correctly.

Q4: What if I can't find my specific reducer in this list?
A: If your product has special characteristics (e.g., alloy steel, special coatings, or composite materials), contact us with your product details and we can help you identify the correct code.

△ Need Help with HS Code Classification?

If you are unsure about the correct HS code for your pipe reducers, our team can assist with product classification based on material, specifications, and destination country.

▶ [Contact us for classification support]

Read more: 

●  Pipe Reducer Size Selection 

●  Pipe Reducer Weight Calculation

●  American Standard Pipe Reducers