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.
 
* 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:
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

• ASME/ANSI B16.5 Class 150 WN
• ASME/ANSI B16.5 Class 300 WN
• ASME/ANSI B16.5 Class 600 WN
• ASME/ANSI B16.5 Class 900 WN
• ASME/ANSI B16.5 Class 1500 WN
• ASME/ANSI B16.5 Class 2500 WN
• ASME B16.47 Series A/MSS SP-44 Class 150 WN
• ASME B16.47 Series A/MSS SP-44 Class 300 WN
• ASME B16.47 Series A/MSS SP-44 Class 600 WN
• ASME B16.47 Series A/MSS SP-44 Class 900 WN
• ASME B16.47 Series B/API 605 Class 75 WN
• ASME B16.47 Series B/API 605 Class 150 WN
• ASME B16.47 Series B/API 605 Class 300 WN
• ASME B16.47 Series B/API 605 Class 600 WN
• ASME B16.47 Series B/API 605 Class 900 WN
• BS 3293 Class 150 WN
• BS 3293 Class 300 WN
• BS 3293 Class 600 WN
• DIN 2630 PN 1, 2.5
• DIN 2631 PN 6
• DIN 2632 PN 10
• DIN 2633 PN 16
• DIN 2635 PN 40