304 F304 Wn RF Rtj FF ANSI JIS DIN Cl150 Pn10 Pn16 Forged Stainless Steel Weld Neck Flange

　　WN Flange (Weld neck Flange) is one of the most commonly used flange in the piping industry. They are easy to recognize with their long tapered hub that is matched to the wall thickness (bore) of the pipe.

　　Weld neck flange and long weld neck flange provide reinforcement in application requiring high pressure and during low and high pessure extremes. It also helps in low cycle fatigue caused by line expansion of other variable forces.

　　Weld neck flange bore is machined to match the size of the pipe or fitting. This creates a smooth transition to and from the weld neck flange and prevents turbulence at the welding neck. Hence it is important to specify the pipe schedule at the time of buying a weld neck flange. Weldneck flange is welded to pipe with full penetration weld and provides excellent stress distribution through tapered neck.

　　Weld neck flange is available in both raised face and flat face configuration. Most common weld neck flanges have standard bore or extra heavy bore. Sch 120 or Sch 160 bore weld neck flanges, in heavier weights such as 600# to 1500# are also common in weld neck flange.

Weld Neck Flange Description

　　Material: Carbon, Alloy and Stainless Steel

　　Standards: ASTM A105, ASTM A182

　　Sizes: 1/2'' to 24'', Customized up to 48''

　　Thickness: Schedule 10(S) to SCH 160

　　Pressure Ratings: Class 150 to 2500

　　Face Type: RF, RTJ

Standards for Weld Neck(WN) Flange

　　Material Standards

　　ASTM A105/N For carbon steel weld neck flange

　　ASTM A182 F11, F22 for alloy steel

　　ASTM A182 F304 / F304L, F316 / F316L for stainless steel weld neck flange.

　　Manufacturing Standards

　　ASME B16.5

　　ASME B16.47

　　BS 3293

　　DIN 2630 PN 1 and PN 2.5, 2631 PN 6, 2632 PN 10, 2634 PN 16, 2634 PN 25, 2635 PN 40

Applications and Features of Weld Neck Flange

　　Weld neck flange mainly used in medium, high pressure pipes connecting, most butt weld neck flange with neck also called nipple flange.

　　Therefore, the installation cost of the weld neck flange, labor costs and auxiliary materials costs are higher, because there is more than one process.

Dimensions of Weld Neck Flange