(19)

(11)

EP 4 483 095 A1

(12)

(43) Date of publication: 01.01.2025 Bulletin 2025/01 (21) Application number: 23711943.3 (22) Date of filing: 15.02.2023

(51) International Patent Classification (IPC):  F23C 1/08(2006.01) F23D 11/24(2006.01) F23D 14/26(2006.01) F23C 7/00(2006.01) F23D 14/24(2006.01) F23D 17/00(2006.01) (52) Cooperative Patent Classification (CPC): F23C 1/08; F23C 7/004; F23D 11/24; F23D 14/24; F23D 17/002; F23D 14/26; F23D 2900/00014 (86) International application number: PCT/BR2023/050055 (87) International publication number: WO 2023/159288 (31.08.2023 Gazette 2023/35)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 23.02.2022 BR 102022003410 (71) Applicant: VALLOUREC TUBOS DO BRASIL LTDA 35460-000 Brumadinho - MG (BR)	(72) Inventor: DE FREITAS FIALHO, Lucas 35774-000 Paraopeba - MG (BR) (74) Representative: Mbacke, Mactar  Vallourec Tubes DPI 12 Rue de la Verrerie 92190 Meudon 92190 Meudon (FR)