WN SO PL Flanges

WN SO PL Flanges

WN Flanges

Full name: Welded neck flange

Connection type: Butt welding

Sealing face: Raised face (RF), female face and male face (FM & M), tongue face and groove face (T & G), flat face (FF), ring type joint (RTJ)

Introduction: This flange is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therfore favoured in critical applications.

SO Flanges

Full name: Slip-on flange

Connection type: Downward welding or flat welding

Sealing face: Raised face (RF), female face and male face (FM & M), tongue face and groove face (T & G), flat face (FF), ring type joint (RTJ)

Introduction: This flange is slipped over the pipe and then fillet welded. Slip-on flanges are easy to use in fabricated applications.

PL Flanges

Full name: Plate flange

Connection type: Downward welding or flat welding

Sealing face: Raised face (RF), flat face (FF)

Introduction: This flanges, known as flat flanges, are typically round and flat. Compared with the slip on flanges, PL flange has no hub and has different sealing faces. They are mainly used in low-pressure applications and are a cost-effective solution for jointing pipes.

The differences between WN and SO/PL flange

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