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FlangeTec® NORSOK L005 :
HP/HT Compact Flange


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The FlangeTecŪ NORSOK L-005 Compact Flange Series is a high performance flange system used as an alternate to conventional ASME and other Compact Flange designs. Designed and manufactured to a recognized European NORSOK specification, utilizing two sealing areas, the FlangeTecŪ NORSOK L-005 Series accommodates High Pressure service especially where extreme external loads are present. The FlangeTecŪ L-005 CF Series offers dramatic weight and space savings when compared with Standard ASME and other Compact Flange systems used in Riser, LNG piping, pressure vessels and OEM equipment.


  1. Up to 1/5th the equivalent ASME Flange weight and space
  2. Swivel Flange design option available
  3. "All Metal" Gas Tight Leak Tight Sealing Technology
  4. Typically stronger than the pipe, no periodic re-tightening necessary
  5. Self Energized, re-usable seal ring


  • Codes: ASME VIII Div. 2 and PED
  • Ratings: ASME 150lbs, through 4500lbs. Temperature range from -425°F (-254°C) to 700°F (371°C)
  • Sizes: 1/2" (12mm) through 200" (5000mm)
  • Materials: CS c/w Cladding, Alloy, SS and Chrome/Nickel Alloys
  • Options: Third Party Design Verification as required


The NORSOK L005 Flange Design is NOT recommended for NACE service applications.