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EN 10253 Pipe Fittings

EN 10253 Pipe Fittings: Elbows, Tees, Reducers and Caps

Butt-weld pipe fittings are essential components of industrial piping systems.

In European projects, EN 10253 is an important standard for butt-welding fittings.

Common EN 10253 Pipe Fittings

90° Elbow

Used to change the pipeline direction by 90 degrees.

45° Elbow

Used where a smaller directional change is required.

Equal Tee

An equal tee connects three pipes of the same nominal diameter.

Reducing Tee

A reducing tee connects branch piping with a smaller diameter.

Concentric Reducer

A concentric reducer reduces pipe diameter while maintaining a common centerline.

Eccentric Reducer

An eccentric reducer has offset centerlines and is often selected where drainage or pump suction requirements need to be considered.

Pipe Cap

Caps are used to close pipe ends permanently.

Materials

Common materials include:

  • Carbon steel
  • Stainless steel
  • Low-temperature carbon steel
  • Alloy steel
  • Duplex stainless steel

Why Fitting Wall Thickness Matters

Pipe fittings must be selected according to the connected piping system.

Important parameters include:

  • Nominal diameter
  • Wall thickness
  • Material grade
  • Manufacturing standard
  • Pressure and temperature
  • End connection

Manufacturing and Inspection

Professional pipe fitting suppliers should control:

  • Chemical composition
  • Mechanical properties
  • Dimensions
  • Wall thickness
  • Heat treatment
  • Surface condition
  • Marking
  • Material traceability

Required documentation may include EN 10204 3.1 material certificates and inspection reports.

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