(19)
(11) EP 0 375 455 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.08.1990 Bulletin 1990/35

(43) Date of publication A2:
27.06.1990 Bulletin 1990/26

(21) Application number: 89313508.7

(22) Date of filing: 22.12.1989
(51) International Patent Classification (IPC)5A62C 4/02
(84) Designated Contracting States:
BE CH DE ES FR GB IT LI NL SE

(30) Priority: 23.12.1988 CA 587033

(71) Applicant: WESTECH INDUSTRIAL LIMITED
Calgary Alberta T2H 0S8 (CA)

(72) Inventors:
  • Roussakis, Nicholas
    Toronto, Ontario M4B 1A6 (CA)
  • Lapp, Kenneth Ora
    Calgary Alberta T2H 0S8 (CA)

(74) Representative: Stanley, David William et al
APPLEYARD LEES 15 Clare Road
Halifax West Yorkshire HX1 2HY
Halifax West Yorkshire HX1 2HY (GB)


(56) References cited: : 
   
       


    (54) Flame arrester


    (57) A flame arrester (1) for a pipe line (5) is provided comprising a detonation attenuator (4) mounted within an arrester chamber (13) between a quenching element (3) and a backflash flame inlet (12). The attenuator (4) is generally cup-­shaped, aligned with the inlet, of greater diameter than the inlet but of lesser diameter than the arrester chamber, and is positioned close to the inlet so as to circumscribe it. The major portion of the high pressure central portion of a detonation wave generated by a backflash is received by the cup and reflected back into the pipe. Some of the detonation wave passes around the cup and impinges on the arrester element - however it has been delayed sufficiently to ensure complete quenching of the flame front in the element.







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