Welding Neck Flanges, NW Long Weld Neck Flanges
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. The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design.
Weld neck flanges
Weld neck flange
- 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:
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- 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
Standards, Dimensions & Weight
NW Long Weld Neck Flanges
NW Long Weld Neck Flanges
- Tube OD sizes: 3/8 to 2 inches
- Materials:
- 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
