Long Weld Neck Flanges

The NW Long Weld 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. The NW Long Weld Neck Flanges are the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design.

NW Long Weld Neck Flanges
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
EVAC metal seal: -270°C to 150°C

--- Hot flanges by Sunny Steel ---

  • Blind Flanges, BL Flange, BLRF
    The blind flange is used to close ends of piping systems.