Compact Flanges

The first original Compact Flange designed to meet the requirements of ASME VIII Div 1 & 2, Type Approved & Fire Tested.

Offering weight savings of up to 88% when compared to the equivalent ANSI Flange. Quick and easy make-up with superior mechanical strength and fatigue performance.

The Desflex Compact Flange is ideal for both topsides and sub-sea applications where minimum weight is essential and reduced maintenance.

Both standard and swivel type weld neck flanges are available in Carbon, Stainless, Alloy and Duplex steels.

Desflex Flanges are Type Approved and have successfully passed API Fire tests.

Available to meet NORSOK standards
The patented design includes several unique features including spherical nuts on the bolting to reduce bolt stresses and a toe at the outside diameter to limit Flange rotation and to prevent overstressing of the flange.

Reusable metal-to-metal Seal
The Destec D and RD range of all metal Seal Rings are used.

Swivel Flange

Download the Destec Compact Flange PDF

    Compact Flange
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    Substantial size and weight saving when compared with standard API and ANSI flanges using compressible and/or ring type joints of the same rating.

    JUST COMPARE:
    6″ – 2500 lb ANSI flange with bolting – 783 lb (355 kg)
    6DF25-D135 = 188 lb (85.2 kg)
    A 76% SAVING IN WEIGHT.

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    Profile of hydraulic tensioner. Standard Desflex flanges are designed to accept hydraulic bolt tensioners.

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    Flanges stress during assembly is controlled by limiting flange rotation via a small gap at the toe of the flange. Excessive bolt tightening cannot overstress the flanges.

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    Spherically seated nuts minimise overstressing of the bolts due to bending. On standard flanges flange rotation can cause the bolting faces to be 2° out of parallel.

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    THE DESTEC 'D' TYPE METAL-TO-METAL SEAL

    This well established and proven seal provides the ultimate in reliability under high pressure, high temperature and thermal cycling.

    FLUSH BORE

    The 'D' type seal is flush with the bore of the pipe. Specials are not required for a 'clinical' joint

    The Desalign Misalignment Ball Flange connector is used where there is a misalignment in the pipeline, and is also a swivel flange that mates to a standard Desflex compact flange.

    The assembly is 1500 lbs or 900 lbs ANSI rated, piggable in both directions and is sealed at the bore using Destec sealing Technology.

    Sizes from 4' to 24'.

    Ball Flange

    1500 lb rated Ball swivel assemblies

    Nominal Pipe SizeDesflex Flange SizeBall Seal SizeBall Swivel Assembly
    4″4DF1515HDB 954DFB15
    6″6DF1515HDB 1406DFB15
    8″8DF1515HDB 1808DFB15
    10″10DF1515HDB 22510DFB15
    12″12DF1515HDB 26012DFB15
    14″14DF1515HDB 29014DFB15
    16″16DF1515HDB 33516DFB15
    18″18DF1515HDB 37518DFB15
    20″20DF1515HDB 41520DFB15
    24″
    		24DF1515HDB 49524DFB15

    900 lb rated Ball swivel assemblies

    Nominal Pipe SizeDesflex Flange SizeBall Seal SizeBall Swivel Assembly
    4″4DF99HDB 1054DFB9
    6″6DF99HDB 1556DFB9
    8″8DF99HDB 2008DFB9
    10″10DF99HDB 25010DFB9
    12″12DF99HDB 29512DFB9
    14″14DF99HDB 32514DFB9
    16″16DF99HDB 37016DFB9
    18″18DF99HDB 41518DFB9
    20″20DF99HDB 46520DFB9
    24″
    		24DF99HDB 55524DFB9

    For more information about our products and services call us on 01522 791721 or email us at sales@destec.co.uk