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(11)    Patent No :    AP 2172   
(21)    Application No :    AP/P/2007/003967   
(22)    Filing Date :    21.09.2005   
(24)    Date of Grant &    19.11.2010   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
GB    0420971.4    21.09.2004
(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
(73) Applicant(s)


Gate, Exhibition Road, London, SW7 2QA,
United Kingdom

(72) Inventors

BIRCH Philip Lloyd, United Kingdom

TALLIS William, United Kingdom

CARO Colin, G, United Kingdom

et al

(74) Representative


(51)  International  Classification   F16L 9/00 (2006.01)    B01F 5/06 (2006.01)
F15D 1/06 (2006.01)    F28F 1/08 (2006.01)

(54)    Title


(57)    Abstract

The present invention relates to piping (1) for use in industrial activities, where the piping (1) has a specific geometry. In particular, the piping (1) is formed as a lowamplitude helix, which causes fluid flowing through the piping

(1) to swirl. This swirl flow provides a large number of advantages. Particular applications where the piping (1) can be used include petroleum production risers and flowlines, production tubing for downhole use in wells, pipelines for

the transportation of fluids, static mixers, bends, junctions or the like, penstocks and draft tubes, reactors for chemical, petrochemical, and

pharmaceutical applications, heat exchangers, cold boxes, incinerators and furnaces for waste disposal, static separators, and air intakes.

(56)    Documents Cited :    US 2004000350 X    WO 01/18406 A    US 2004134557 X


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