Vector Flangelok

Vector Flangelok

Smaller, more reliable alternative to conventional flanges

Vector Flangelok has been developed to offer a smaller, more reliable and higher integrity alternative to conventional flanges. Developed as a derivative of the well established Vector Techlok product range, Flangelok employs the same proven, pressure energized Vector Techlok sealring. When sized to match the pipe bore, Flangelok allows for a much more compact and/or high performance flange to be engineered. This concept has now been realized as a defined product range for existing ASME pressure classes which provides for significant weight and space reduction without sacrificing external load capacity or code compliance.

Vector Flangelok is a versatile product with several flange configurations to suit application needs, together with a host of variants of the Techlok sealring to fulfill all aspects of oilfield and petrochemical operations.

Vector Flangelok is smaller and easier to handle in confined spaces, utilizing smaller bolting and tightened with standard tooling. This will contribute to significant savings, particularly where exotic materials are specified. Flangelok is available in sizes 1” to 24” and ASME pressure classes 600lb to 2500lb (larger or bespoke sizes available on request) ; API 5K and 10K equivalent rated Flangeloks are derived from the 1500lb and 2500lb dimensions respectively.


  • Greatly reduced size

    A substantial weight and space reduction over standard API and ANSI  flanges of the same rating. Shorter, lighter, more compact joint assembly makes handling easier [1]

  • Unique sealing system :

    using the well proven Vector Techlok sealring for maximum high pressure and high temperature reliability [2]

  • Variety of “face-to-face” configurations:

    to suit piping design and operational preferences [3]

  • Minimized weld neck taper results in extra bolt clearance and reduced overall length [4]
  • Standard bolting

    Utilizes standard bolts for straightforward speedy bolting procedures. Smaller bolts require reduced assembly torque.) [5] 

  • Smooth bore profile ensures maximum flow [6]
  • Non-recessed option :

    allowing for easier disassembly and flange separation in service [7] 

  • Sealring options :

    Vector FlangeLok is also available with many seal options for process and metering applications [8]

Design Principles

  • Design Codes

    Vector Flangelok utilizes established Flange Analysis methods detailed in ASME VIII Div. I, Appendix 2. These methods have been adapted/improved to suit the Vector Techlok sealring and to include external bending moment and axial forces. Design allowables are selected to comply with client needs. (i.e. ASME VIII Div. I, API 6A, etc.) and the specified design temperature.

    Resultant forces due to applied bending moment and axial force are combined into the Vector Flangelok code calculations to give a simple, but accurate analysis method. By keeping the seal diameter to a minimum, extra capacity is available for external loads.

  • “Every Action has an equal and opposite reaction”

    This is Newton’s third law. The diagram shows the forces reacting at the bolt and flange faces under applied bending moment. The reaction force at the flange face must equal the total reaction force at the bolt face, resulting in very high localized contact forces between the flanges.

    For Vector Flangelok®, this reaction at the flange face is harmless metal-to-metal contact between flanges (or the Vector Techlok® sealring rib), whereas with conventional flanges the reaction serves to locally crush the gasket on the compression side of the joint and cyclic bending will ultimately deteriorate the gasket seal.

  • Proven seal Technology

    The versatility of the Vector Techlok sealring range provides many options for Vector Flangelok users. Having been developed over many years (with Techlok connectors) Vector Flangelok now benefits by using exactly the same seal configuration ; with stock availability in standard materials.
    Sealring types : blind sealring , orifice sealring, flow straightener sealring, transition sealring , RIT test seals, strainer, insulating sealring. Please click here for more information.

    Flange options :
    various Flangelok facings, Thermowell Flangelok, Weld-o-Flangelok, Sweep-o-Flangelok, Block elbows/tees, Flangelok spools, Orifice Flangelok assemblies

    Vector Flangelok Sealring Options

  • Downloads

Available downloads:

  • Flangelok - General Flyer

    English V003-01-2014 available DOWNLOAD
  • Flangelok - Technical Brochure

    English V002-03-2016 locked DOWNLOAD
  • Reverse Integrity Testing

    English V003-01-2014 available DOWNLOAD

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