Welding Neck Flanges

Short Description:

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange.

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Welding Neck Flanges

product description:

Standards, Dimensions & Weight of WN flange 

The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value.

Specifications of Welding Neck Flanges:

Size: 1/2” to 60”, DN 12mm to DN 1500mm

Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
Facing: RF / RTJ

Material of Welding Neck Flanges:

Cabon steel: A105, A350 LF2, C22.8, S355JR
Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: F11, F12
Packing: plywood case and plywood pallet

Temperature range:

Viton: -20°C to 200°C
Silicone: -50°C to 230°C
Buna: -30°C to 110°C
EVAC metal seal: -270°C to 150°C
Tube OD sizes: 3/8 to 2 inches


Flange: 304 or 316L stainless steel
O-rings: Viton, Buna, & silicone
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps

Vacuum range:
Elastomer seal: >=1 x 10^-8 Torr - High vacuum
EVAC metal seal: >=1 x 10^-11 Torr - UHV

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