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GC-Compact® Flanges

The GC-Compact® Flange has a well-established record throughout the world, meeting or exceeding all current industry codes and standards.

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Size

1/2” to 42” nominal pipe (Larger sizes available upon request)

26” to 42” Class 1500

14” to 24” Class 2500

1/2” to 20” Class 4500​

Thickness

All Standard Schedules Intermediate & Heavy Wall also available

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Type

  • Weld neck flange

  • Blind flange

  • Swivel flange

  • Integral (equipment) flange

  • Rigid interface and line blanks
     

  • Orifice flanges, restriction orifices and drip rings are also available on request.

GC-Compact Flange
Rating

300# - 2500#

4500#

Dimensional Standard

G-Lok Compact Flange System comply with ANSI, ASME, EN-DIN and API Standards.


Alternatively, we can provide Compact Flanges in accordance with Norsok L-005
 

The GC-Compact® Flanges comply with the ANSI, ASME, EN-DIN and API standards and have been widely approved by numerous oil companies and recognised inspection authorities. The reliability of the G-C® Compact Flange make this product an excellent alternative to conventional ANSI and API flanges, especially for high pressure applications.

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The GC-Compact® Flange achieves extremely high levels of performance by incorporating the most important concepts in piping connector design:

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  • Seal-seat the smallest possible diameter (to reduce pressure separation loads)

  • Dual metal-metal sealing

  • Isolate the seal ring from piping loads and internal fluid (to maintain performance under changing conditions).

  • Face to face contact after make-up and during normal operation conditions-added strength.

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The Advantages​
Weight/space savings

  • Industry practice for offshore design suggests a requirement of two kilograms of structure to support one kilogram of deck weight. 

  • Using GC-Compact® Flanges, weight savings in the range of 60% to 80% compared to ANSI flanges are achievable.

  • The flanges are shorter and have smaller diameters than conventional flanges typically 20% to 30% smaller diameters and 25% to 40% shorter connection length when compared to a standard ANSI Flange.

Easy and Quick Make-up & Installation

  • The light weight, small size and reduced bolting ensuring ease of handling and assembly. 

  • Reduced connector size leaves more space for the operator and the tooling, and the smaller diameter bolting allows lighter weight tooling to be used. Bolt load up to 100% of desired bolt load first time reduced number of bolting pre-load cycles. 

  • The controlled flange rotation (closing off the gap at the toe) gives a direct indication of correct pre-load. 

  • Utilise standard imperial bolts for straightforward speedy bolting procedures. 

  • Normal off-the-shelf torque and tensioners (topside and subsea) can be used to lighten the bolts up to the desired bolt pre-stress level of minimum 60% of bolt yield stress.
     

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