The Weld neck flange
is designed to joint a piping system by butt welding. The hub, or neck, transfer the stresses to the pipe to reduce high stress concentrations. The bore of the weld neck flange matches the pipe bore.
Weld Neck flange is typically provided with a raised face(RF), flat face(FF), or ring type joint face(RTJ). When a raised face is necessary for weld neck flange, the standard height is 1/16" for blind flanges under 400#. For blind flange of 400# and up, the standard blind flange raised face height is 1/4".
Weld Neck Flange manufacturer Duwa Piping can supply weld neck flanges in all materials grades, specification and sizes. Duwa Piping have some stock and can delivery weld neck flange in 3 days.
Size: 1/2" to 96".
Flange Face: Raised Face(RF), Flat Face(FF), Ring Type Joint(RTJ), T&G.
Flange Pressure: 150#--6000#(PN6-PN40).
Schedule: SCH40/XS, STD.
Carbon Steel: ASTM A105.
Low-Temperature: ASTM A350 LF1 LF2 CL1/CL2, LF3 CL1/CL2.
Stainless Steel: ASTM A182 F304/304L, F316/316L, F321.
Alloy Steel: ASTM F1 F5 F9, F11, F91.
Pipeline Steel: A694 F42 F52 F60 F65.