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Flanges

Flanges & Solutions - MGH YAPI
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Flanges & Connections

Comprehensive range of high-quality Flanges designed for reliable, leak-proof connections in demanding piping systems across various industries.

Flanges

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Flange Type / Primary Application Design Characteristics & Typical Uses Key Applicable Standards & Specifications
WELD NECK FLANGE (High-Pressure/Temperature, Critical Services)
  • Design: Long tapered hub for stress distribution. Butt-weld connection to pipe.
  • Applications: Refineries, power plants, offshore, high-vibration systems.
  • Materials: A105, A350 LF2, A182 F316, F22, F91.
 Dimensions:
  • ASME B16.5 (NPS ½" to 24")
  • ASME B16.47 Series A/B (NPS 26" to 60")
  • EN 1092-1 (European standard)
Materials:
  • ASTM A105 (Carbon Steel Forged)
SLIP-ON FLANGE (Moderate Pressure, Cost-Effective Applications)
  • Design: Bores slightly larger than pipe OD. Fillet welded inside and outside.
  • Applications: Water treatment, HVAC, low-pressure process.
  • Materials: A105, A216 WCB, 304/316 SS.
 Dimensions:
  • ASME B16.5
  • EN 1092-1
Installation:
  • ASME B31.3 (Process Piping Code)
BLIND FLANGE (System Isolation, Pressure Testing, Future Connections)
  • Design: No bore - solid disc.
  • Used for: Line termination, manways, test points.
  • Materials: A105, A182, A350.
  • Note: Highest pressure rating per class.
 Dimensions:
  • ASME B16.5
  • EN 1092-1
Design:
  • ASME Section VIII Div 1 (Pressure vessel rules apply)
SOCKET WELD FLANGE (Small-Bore High-Pressure Piping)
  • Design: Socket for pipe insertion. Single fillet weld connection.
  • Applications: Instrument lines, hydraulic systems, ≤ NPS 2".
  • Materials: A105, A182 F304/316.
 Dimensions:
  • ASME B16.5
  • ISO 7005-1
Limitations:
  • Not suitable for corrosive/erosive services
LAP JOINT FLANGE (Systems Requiring Frequent Disassembly)
  • Design: Used with stub end. Flange rotates for bolt hole alignment.
  • Applications: Food processing, pharmaceutical, maintenance-intensive systems.
  • Materials: Often A105 with SS stub end.
 Dimensions:
  • ASME B16.5
Components:
  • ASME B16.9 (Stub End dimensions)
THREADED FLANGE (Non-Welded Connections, Low Hazard Services)
  • Design: Internal NPT threads. Seal weld sometimes applied.
  • Applications: Air/water utilities, low-pressure fuel, instrumentation.
  • Materials: A105, A182.
  • Limitation: Not for cyclic/temperature services.
 Dimensions:
  • ASME B16.5
Thread Standards:
  • ASME B1.20.1 (NPT threads)
ORIFICE FLANGE (Flow Measurement Applications)
  • Design: Jack-screw holes for orifice plate removal. Pressure tap connections.
  • Applications: Metering runs, flow measurement stations.
  • Materials: A105, A350 LF2.
 Dimensions:
  • ASME B16.36 (Orifice Flanges)
Measurement:
  • ISO 5167 (Flow measurement)
REDUCING FLANGE (Line Size Reduction)
  • Design: Different bore sizes. Integral reducer design.
  • Applications: Pump connections, valve manifolds, equipment nozzles.
  • Materials: A105, A182.
 Dimensions:
  • ASME B16.5
Alternative:
  • Use standard flange + reducer fitting
SPECIAL FLANGES (Industry-Specific Applications)
  • Long Weld Neck: For vessel nozzles, heat exchangers.
  • Expander/Reducer: Combination flange.
  • Custom Drilling: Non-standard bolt patterns.
  • Materials: Per application requirements.
 Standards:
  • ASME B16.47 Series A/B (Large diameter)
  • MSS SP-44 (Steel pipeline flanges)
  • API 6A (Wellhead equipment)
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