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Regular Flanges

Slip-On Flange

  • Simple Structure: Simple design with low manufacturing cost
  • Easy Installation: Easy installation by inserting pipe and welding
  • Cost-effective: Relatively low cost with high cost-performance ratio
  • Good Sealing: Reliable sealing through welding connection
  • Wide Application Range: Suitable for multiple low-pressure conditions
  • Easy Processing: Simple structure for easy mechanical processing
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Slip-On Flange is a commonly used pipe connection flange with a simple structure, relatively simple design, and no complex structure, making it easy to manufacture and install. The flange is connected by inserting the pipe into the flange bore and then welding on both sides of the flange plate. Slip-on flanges feature low cost, easy installation, and good sealing performance, and are widely used in low-pressure pipeline systems in fields such as water supply and drainage engineering, petrochemical, and HVAC.

Technical Standards

Item Technical Standard
Material Carbon Steel, Stainless Steel, Alloy Steel
Standard ASME B16.5, ASME B16.47, EN 1092-1, GB/T 9113
Pressure Rating PN2.5 to PN100, Class150 to Class300
Size Range 3/8" to 80" (DN10 to DN2000)
Temperature Range -29℃ to +425℃
Face Type Flat Face (FF), Raised Face (RF)
Welding Type Slip-On Welding
Manufacturing Process Forging, Machining

Basic Models

Model Type Features
SO-10 PN10 Slip-On Flange Low pressure application, cost-effective
SO-16 PN16 Slip-On Flange Low-medium pressure application, stable performance
SO-25 PN25 Slip-On Flange Medium pressure application, moderate strength
SO-40 PN40 Slip-On Flange Medium-high pressure application, safe and reliable

Main Components Material Table

No. Part Name Material
1 Flange Body A105, A350 LF2, F304, F316
2 Sealing Face Same as flange body
3 Weld Bevel Matched to pipe material
4 Surface Treatment Anti-rust paint, galvanized or passivated
5 Bolt Holes Machined as part of flange body

No drawing available.