Brazil NCM · 8-digit subitem

NCM 7304.29.31 – Uncoated alloy casing/tubing, OD up to 229 mm

NCM 7304.29.31 (also written 73042931) is Brazil's code for uncoated alloy casing/tubing, OD up to 229 mm. Its first 6 digits are HS code 7304.29.

Official description of NCM 7304.29.31

PortuguêsOfficial
De diâmetro exterior inferior ou igual a 229 mm
EnglishUnofficial translation

Of an external diameter of 229 mm or less

Nomenclatura Comum do Mercosul (Siscomex). Updated Oct 2026 · In force since Apr 2022 (Res Gecex 272/2021).

How to read NCM 7304.29.31

73Chapter 04Heading 29Subheading

HS code 7304.29
Same in every country

3Item 1Subitem

Added by Mercosur
Brazil, Argentina, Paraguay, Uruguay

The first 6 digits are the international HS code, so their meaning is the same in every country; Brazil publishes the text in Portuguese. Digits 7 and 8 are Brazil's own split of that HS code. The full 8-digit code is used on import declarations (DUIMP), invoices (NF-e) and tax filings.

Full classification path

  1. Chapter 73 Iron or steel articles Obras de ferro fundido, ferro ou aço.
  2. Heading 73.04 Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel Tubos e perfis ocos, sem costura, de ferro ou aço.
  3. Group 7304.2 Casing, production or supply tubing and drill pipe, of a kind used in the extraction of oil or gas: Tubos para revestimento de poços, de produção ou suprimento e hastes de perfuração, do tipo utilizado na extração de petróleo ou de gás:
  4. Subheading 7304.29 Iron or steel (excluding cast iron or stainless steel); seamless, casing and tubing, of a kind used in drilling for oil or gas Outros
  5. Item 7304.29.3 Of other alloy steel, not coated De outras ligas de aço não revestidos
  6. Subitem 7304.29.31 Of an external diameter of 229 mm or less De diâmetro exterior inferior ou igual a 229 mm

Other NCM codes under HS 7304.29

7304.29.10 Seamless non-alloy oil or gas casing and tubingDe aço não ligado 7304.29.39 Uncoated alloy casing/tubing, OD over 229 mmOutros 7304.29.90 Other seamless oil or gas casing and tubingOutros

Questions about NCM 7304.29.31

What is NCM 7304.29.31?

NCM 7304.29.31 (73042931) is the Brazilian (Mercosur) code for uncoated alloy casing/tubing, OD up to 229 mm. Its official Portuguese description is “De diâmetro exterior inferior ou igual a 229 mm”.

What is the HS code for NCM 7304.29.31?

HS 7304.29 (Iron or steel (excluding cast iron or stainless steel); seamless, casing and tubing, of a kind used in drilling for oil or gas). The first 6 digits of an NCM code are its international HS code; the last 2 digits are Brazil's own split.

Is an NCM code the same as an HS code?

The first 6 digits are the same in every country. NCM adds an item digit (7th) and a subitem digit (8th). A code ending in 00 means Brazil does not split that HS code further.

Which countries use NCM 7304.29.31?

All Mercosur members use the same NCM codes: Argentina, Brazil, Paraguay and Uruguay.

Source: Siscomex Classif NCM table, updated Oct 2026 (Resolução Gecex nº 926/2026). The Portuguese text is the official one; the English is our translation.