Weld Neck Flange

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.
Specifications:
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.
Material:
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.
 

Products List

ASTM A105 WELD NECK FLANGE, ASME B16.5, 10IN, 150 LB, SCH STD
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DW WNF-13

Chinese ASTM A105 Weld Neck Flange Manufacturer Provides ASTM A105 Weld Neck Flange, ASME B16.5, Size 10IN, Pressure 150 LB, Wall Thickness SCH STD.
Raised Face Weld Neck Flange, A105,1/2-90 Inch,CL150-1500,SCH STD-XS
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DW-WNF-1

China Raised Face Weld Neck Flange Manufacturer Duwa Offers C.S A105 Weld Neck Flange, Raised Face, ASME B16.5, CL150-1500, SCH-STD, 1/2-90 Inch.
ASTM A182 WELD NECK FLANGE, CL150, DN100, SCH 40, RF
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DW WNF-16

China ASTM A182 Weld Neck Flange Manufacturer Duwa offers ASTM A182 F316 Weld Neck Flange, DN100, CL150, SCH 40, RF, generally applied in machine. Ex-works in 3 days
ANSI B16.5 WELD NECK FLANGE A105 DN200 SCH60 PN50
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DW WNF-15

China ANSI B16.5 Weld Neck Flange Manufacturer Duwa offers ANSI B16.5 Weld Neck Flange, ASTM A105, DN200 Size, SCH 60, PN50. Delivery in 3-5days.
ASTM A182 F304 WELD NECK FLANGE, ANSI B16.5, 4IN, SCH 80, RF ENDS
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DW WNF-14

Chinese ASTM A182 F304 Weld Neck Flange Manufacturer Supplies ASTM A182 F304 Weld Neck Flange, ANSI B16.5, Size 4IN, SCH 80, RF Ends.
ASTM A105 WELD NECK FLANGE, 300LB, 12IN, BLACK COATING
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DW WNF-12

ASTM A105 Weld Neck Flange Manufacturer in China: ASTM A105 Weld Neck Flange, Pressure 300LB, Size 12IN, Black Coating Surface Treatment. Delivery Time 3-5 days.
ASTM A105N Flange,ASME B16.5 Flange,12Inch CL600
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DW WNF-11

China ASTM A105N Flange Manufacturer Duwa offers ASME B16.5 Weld Neck Flanges, Size 12 Inch, CL600, Flange RF Ends, Schedule 80.Delivery in 3days.
A182 F51 WN FLANGE, 2IN, CL2500, RF, ANSI B16.5
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DW WNF-10

China A182 F51 WN Flange Manufacturer Duwa provides ASTM A182 F51 Weld Neck Flange, 2 Inch, Pressure 2500, Standard ANSI B16.5, RF, SCH 40S.
ASTM A694 F52 Weld Neck Flange 20 Inch, CL 600, RTJ
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DW WNF-9

China ASTM A694 F52 Weld Neck Flange Manufacturer Duwa Piping offers ASTM A694 B16.5 WN Flange, RTJ Face (Raised Type Joint), SCH.XS, ASME B16.5, DN500 (20 inch), PN100 (600#). Delivery Ex-works in 3days. EN 10204 3.1 certificate can be supplied.