+8615674993216
sales@forever-steels.com
English
العربية
Steel pipe HS code questions usually appear when a shipment is almost ready. That is exactly when mistakes become expensive. The HS code can affect customs declaration, duty treatment, trade remedy review, import permits, certificates of origin and whether the broker accepts the commercial invoice. For steel pipes, small words such as seamless, welded, stainless, hollow section, line pipe, casing or fitting can move the product into a different heading.
The most common HS headings for steel pipe products are 7304, 7305, 7306 and 7307. The first six digits are harmonized internationally, but the final 8-digit, 10-digit or longer code depends on the country. Under China's 2026 tariff and customs declaration framework, a product may be split again by material, use, manufacturing process, outside diameter and cross-section.
|
Product Type |
Common HS Heading |
Typical Product Examples |
Buyer Reminder |
|
Seamless steel pipe |
7304 |
ASTM A106, API 5L seamless, boiler tube, seamless stainless pipe |
Confirm material, process, use and OD |
|
Large diameter welded circular pipe |
7305 |
LSAW, SSAW, DSAW pipe with OD over 406.4 mm |
OD and welding method are key |
|
Other welded pipe and hollow sections |
7306 |
ERW pipe, galvanized pipe, SHS, RHS, welded stainless pipe |
Shape and material change the subheading |
|
Steel pipe fittings |
7307 |
Flanges, elbows, reducers, tees, couplings, sleeves |
List fittings separately from pipe |
For product matching, buyers can separate inquiries into seamless steel pipes, welded steel pipe, stainless steel pipes, carbon steel hollow sections and pipe fittings.
Heading 7304 is generally used for seamless tubes, pipes and hollow profiles of iron or steel. Buyers normally start here for carbon seamless steel pipe, including carbon steel seamless pipe, alloy seamless pipe and seamless stainless pipe.
The difficulty is that 7304 covers many different products. A seamless carbon steel line pipe is not declared the same way as a stainless boiler tube or an OCTG casing. In China's current 10-digit declaration practice, carbon steel seamless oil and gas line pipe under 730419 is split by outside diameter. Stainless seamless oil and gas line pipe under 730411 follows a similar OD-based logic.
|
China 2026-Style Example |
Product Logic |
What The Buyer Should State |
|
730419 series |
Carbon steel seamless oil/gas line pipe, split by OD |
API 5L grade, seamless process, OD, wall thickness, use |
|
730411 series |
Stainless seamless oil/gas line pipe, split by OD |
Stainless grade, seamless process, OD, wall thickness |
|
730431 / 730439 |
Carbon or non-alloy seamless tube, often split by process/use |
Cold-drawn or hot-finished, boiler/mechanical/general use |
|
730451 / 730459 |
Alloy seamless tube, often split by process/use |
Alloy grade, boiler or other service |
|
730429 |
Oil or gas drilling casing/tubing |
Use, yield strength, API or project standard |
A commercial description like "carbon steel seamless pipe" is too loose. "API 5L Grade B seamless carbon steel line pipe, OD 168.3 mm x WT 7.11 mm, beveled ends" gives the broker a much better basis for classification.
Heading 7305 generally covers welded circular steel pipe with an external diameter over 406.4 mm. This is where many large diameter LSAW, SSAW and DSAW pipes are considered, especially for oil and gas line pipe, water transmission pipe, structural pipe and pipe pile projects.
|
10-Digit China Example |
Typical Product |
Practical Note |
|
7305110000 |
Longitudinal submerged arc welded oil/gas pipe |
Common for LSAW line pipe above 406.4 mm |
|
7305190000 |
Other large diameter oil/gas welded pipe |
May include ERW or SSAW depending on product details |
|
7305200000 |
Large diameter welded casing for oil/gas drilling |
Use and standard should be stated clearly |
|
7305900000 |
Other circular welded pipe above 406.4 mm |
Often relevant when the pipe is not line pipe or casing |
For an ASTM A252 Grade 3 SSAW pipe pile, customs logic may differ from API 5L line pipe even when both are large and welded. The invoice should say whether the product is a pipe pile, line pipe, casing, structural pipe or water pipe. "SSAW pipe" alone is not enough.
Heading 7306 is broad. It covers many ERW pipes, galvanized pipes, smaller welded line pipes, mechanical tubes, square hollow sections and rectangular hollow sections.
|
Product Description |
Possible HS Family |
Key Classification Detail |
|
Welded oil/gas line pipe, OD <= 406.4 mm |
730619 |
Material, OD and line pipe use |
|
Stainless welded oil/gas line pipe |
730611 |
Stainless material and oil/gas use |
|
Other stainless circular welded pipe |
730640 |
Stainless material and circular welded form |
|
Other iron/non-alloy circular welded pipe |
730630 |
OD range, material and surface finish |
|
Welded square or rectangular hollow section |
730661 |
Shape is central; common China code 7306610000 |
|
Welded oval or other non-circular tube |
730669 |
Non-circular welded form |
|
Seamless square/rectangular/oval hollow section |
730490 |
Seamless non-circular hollow profile |
For carbon steel hollow sections, avoid vague invoice wording such as "steel tube." A better description is "ASTM A500 Grade C welded rectangular hollow section, 200 x 100 x 8 mm, carbon steel, black finish."
Many buyers search for "HS code for stainless steel pipe" as if there were a single answer. There is not. Stainless seamless pipe may fall within 7304, stainless welded pipe may fall within 7306, and stainless fittings belong under 7307.
|
Stainless Product |
Likely Heading Family |
Description To Put On Documents |
|
Seamless stainless line pipe |
730411 series |
Grade, seamless process, OD, WT, line pipe use |
|
Other seamless stainless pipe |
730441 / 730449 family |
Grade, process, application and dimensions |
|
Stainless welded line pipe |
730611 family |
Grade, welded process, OD, WT, line pipe use |
|
Other stainless welded circular pipe |
730640 family |
Grade, welded process, OD, WT and finish |
|
Stainless pipe fittings |
73072 series |
Fitting type, stainless grade, standard and size |
When buying stainless steel pipes, state grade, manufacturing method, OD, wall thickness, standard, finish and intended use.
Pipe fittings should not be hidden under the pipe line on the invoice. A shipment containing ASTM A106 pipe, ASTM A234 WPB elbows and ASTM A105 flanges should list each product type separately.
|
Fitting Type |
Common China 10-Digit Example |
Notes |
|
Carbon/alloy steel flanges |
7307910000 |
State standard, pressure class and size |
|
Carbon/alloy threaded elbows, bends, sleeves |
7307920000 |
Threaded or similar fittings |
|
Carbon/alloy butt weld fittings |
7307930000 |
Elbows, reducers, tees under butt weld standard |
|
Other carbon/alloy fittings |
7307990000 |
Couplings, sleeves or other fittings |
|
Stainless flanges |
7307210000 |
Stainless grade and flange standard matter |
|
Stainless threaded elbows, bends, sleeves |
7307220000 |
List separately from pipe |
|
Stainless butt weld fittings |
7307230000 |
Common for stainless elbows and reducers |
|
Other stainless fittings |
7307290000 |
Other stainless pipe fittings |
For steel pipe fittings, clear descriptions reduce customs questions and make site receiving easier.
A clean description normally includes product name, manufacturing method, material, standard, grade, dimensions, surface finish and use.
|
Weak Description |
Better Description |
|
Steel pipe |
API 5L X52 PSL2 LSAW welded carbon steel line pipe, OD 762 mm x WT 19.1 mm, beveled ends |
|
Stainless pipe |
ASTM A312 TP316L seamless stainless steel pipe, OD 60.3 mm x WT 3.91 mm, pickled finish |
|
Square tube |
ASTM A500 Grade C welded square hollow section, 100 x 100 x 6 mm, carbon steel |
|
Pipe fittings |
ASTM A234 WPB carbon steel butt weld elbow, 90 degree, 8 inch, SCH 40 |
The current practical reference should be the 2026 tariff line, the 10-digit customs commodity code and the official declaration element requirements. Final classification still belongs to the importer of record and the destination-country customs broker.
1. API 5L Line Pipe Selection Guide for Oil and Gas Projects
2. Steel Pipe Inspection Checklist Before Shipment
3. How Many Steel Pipes Can Fit in a Shipping Container?
4. ASTM A312 vs A269 vs A213: Stainless Steel Pipe Selection Guide
