NW Long Weld Neck Flanges

The NW Long Weld Neck Flanges is normally referred to as the high hub . It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the . The NW Long Weld Neck Flanges are the best designed butt-welded of those currently available becuase of its inherent structural value. It is expensive because of the design.


NW Long Weld Neck Flanges

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

Temperature range
Viton: -20°C to 200°C
Silicone: -50°C to 230°C
Buna: -30°C to 110°C

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