Structural Connectors

Super-Tight is an advance weld less forged steel pressure vessel equipment, design to join two ends (a flanged end to a bare end) of pipes with bolting arrangement. Equipped with internal components of matching hardened steel with precise tolerances in comply with elastomeric sealing systems with accurate chemical and mechanical properties.


  • Low torque and less number of bolting
  • Repeatable and corrective installation without dismantling the mechanism
  • Adjustable end gap to tolerate spool length
  • Test port feature to test the sealing prior to pressurizing the line
  • Tolerant of ovality with independent gripping blocks
  • Minimum pipe end preparation
  • Sour service compliant
  • Environmental seal
  • Gripping force control to avoid pipeline damage in oversized OD
  • Guiding rods (for easier and faster installation)
  • Piggable after installation
  • Cathodic protected (25+ years)
  • No hot-work permit needed
  • Diver and diver-less options
  • Mechanical /Hydraulic activation
  • Permanent installation
  • Single operation with no follow up works
  • Internal and external protective coating
  • ANSI pressure rating from 400 to 2500
  • Sizes from 4" up to 56"
  • Forged steel treated material
  • 100% hydrotested
  • N2, NBR,VITON Graphite and PU elastomer packing
  • NDT test and full inspection documentation
  • Installation saddle
  • Long-term storage packaging offered

Applicable Standards and Codes

  • API SPEC 6H, Specification on End Closures, Connectors and Swivels.
  • ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 and 2.
  • ASME Boiler Pressure Vessel Code, Section V Non-Destructive Examination.
  • ASME Boiler and Pressure Vessel Code, Section IX Welding and Brazing Qualifications.
  • NACE MR0175, Part 1 & Part 2 (Resist Sulfide Stress Cracking).
  • ASME B31.8 Gas Transmission and Distribution Piping System.
  • ASME B31.4 Piping Transportation System for Liquid Hydrocarbons And Other Liquids (General Acknowledgment).
  • DNV RP-F104 General Acknowledgment (For Offshore).
  • DNV Recommended Practice RP B401, Cathodic Protection Design.
  • MSS SP-44, Steel Pipeline Flanges.
  • API SPEC 5L, Specification for Line Pipe (General Acknowledgment).
  • ASME/ANSI B18.2.1, Square and Hex Bolts and Screws Inch Series.
  • Standards of materials including: A193, A194, AISI 4140, AISI 4130, A105, A 516.
  • ASME B16.5, Pipe Flanges and Flanged Fittings.
  • ASME B16.47, Large Diameter Steel Flanges.
  • ASME/ANSI B16.20, Metallic Gaskets for Pipe Flanges - Ring Joint, Spiral Wound and Jacketed.


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