(19)
(11) EP 0 676 597 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.05.1996 Bulletin 1996/20

(43) Date of publication A2:
11.10.1995 Bulletin 1995/41

(21) Application number: 95830078.2

(22) Date of filing: 06.03.1995
(51) International Patent Classification (IPC)6: F24H 9/00, F28F 13/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB IE LI NL PT

(30) Priority: 06.04.1994 IT MI940248 U

(71) Applicant: FERROLI S.p.A.
I-37047 San Bonifacio (Verona) (IT)

(72) Inventor:
  • Ferroli, Dante, c/o Ferroli S.P.A.
    I-37047 San Bonifacio VR (IT)

(74) Representative: Cicogna, Franco 
Ufficio Internazionale Brevetti Dott.Prof. Franco Cicogna Via Visconti di Modrone, 14/A
20122 Milano
20122 Milano (IT)


(56) References cited: : 
   
       


    (54) Pipe assembly for conveying fumes in steel boilers provided with condensate quick evaporating means


    (57) The present invention relates to a pipe assembly for conveying fumes in steel boilers provided with condensate quick evaporating means, characterized in that it comprises an inner pipe (2) and an outer pipe (3) which define a closed gap (4) therebetween.
    The main feature of the invention is that between the inner pipe (3) and outer pipe (4) are provided contacting lines extending according to parallel lines which are either helicoidal or not.






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