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CN 7304

Tubes, pipes and hollow profiles, seamless, of iron or steel (excl. products of cast iron)

✓ In scope of CBAM Iron and steel

CBAM cost preview

Live ETS price: €78.73/t CO₂. Sample: 1 tonne of CN 7304 at default factors costs ~€16.97 in CBAM certificates today.

Direct emissions
1.88 t CO₂/t
Indirect emissions
0.275 t CO₂/t
CBAM cost (1000 t shipment)
€16,966
How is this calculated?

CBAM certificate cost = embedded emissions × ETS price × (1 − free-allocation factor) × phase-in markup.

Phase-in 2026: 10% of full certificate cost. Free allocation assumed 0% in this preview.

Calculate my CBAM cost →

Top exporters into the EU

Eurostat Comext, latest available year. Volumes shown are extra-EU imports (tonnes).

OriginTonnes / yrShare
China450,00065%
Ukraine130,00019%
India110,00016%

Source: Eurostat Comext annual extra-EU trade.

How to comply for this code

Reviewed by AutoCBAM team — last updated 2026-04-28.

Methodology guide -- CN 7304 (seamless steel tube)

Seamless tube is high-value CBAM steel, dominated by Chinese supply (~450kt/yr). Production process (Mannesmann piercing) is energy-intensive, adding to upstream BF-BOF emissions.

Step 1 -- request route-specific verified data. Seamless tube emissions vary by mill: modern Chinese plants (Tianjin Pipe, Baosteel) report 1.9-2.2 t/t direct; older capacity reports 2.3-2.6 t/t.

Step 2 -- handle oil & gas grades carefully. OCTG (Oil Country Tubular Goods) often has API 5L or API 5CT certifications with stringent quality control. CBAM verification is independent of API certification -- request both.

Step 3 -- monitor strategic supply. Seamless tube supply is concentrated; CBAM cost differences between qualified suppliers can be material in long-term procurement decisions.

Frequently asked questions

What is CN 7304?
Tubes, pipes and hollow profiles, seamless, of iron (excl. cast iron) or steel. Used in oil & gas, power generation, structural applications.
How does seamless production differ from welded for CBAM?
Seamless tube production uses Mannesmann piercing or extrusion -- emissions intensive. Per-tonne emissions are typically 0.1-0.2 t CO2/t higher than welded tube of equivalent grade.

Get an emissions cost report for this product

Free PDF with sector defaults, top-3 origin countries and an ETS-linked cost forecast for CN 7304.

Related codes

Parent heading: 7304

  • CN 73041100 — Line pipe of a kind used for oil or gas pipelines, seamless, of stainless steel
  • CN 730419 — Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel (excl. produ
  • CN 73042200 — Drill pipe, seamless, of stainless steel, of a kind used in drilling for oil or gas
  • CN 73042300 — Drill pipe, seamless, of a kind used in drilling for oil or gas, of iron or steel (excl. p
  • CN 73042400 — Casing and tubing, seamless, of a kind used for drilling for oil or gas, of stainless stee
  • CN 730429 — Casing and tubing, seamless, of iron or steel, of a kind used in drilling for oil or gas (
  • CN 730431 — Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-allo
  • CN 730439 — Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-allo
  • CN 73044100 — Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel,
  • CN 730449 — Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel,

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Reference data only — confirmed CBAM scope ultimately depends on TARIC declaration and the latest amendments to CBAM Annex I.