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What Is A Weld Neck Flange

Apr 25, 2020

        A Weld Neck Flanges is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant.

        A Weld Neck Flanges  consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

Characteristicsof Weld Neck Flanges

         Weld Neck Flanges are flanges with the wall thickness of the flange having the same dimensions of the matching pipe, the lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the smaller the bore, they are normally used for high pressure, cold or hot temperature.

         Weld Neck Flanges  or welding-neck flanges can be differentiated from all other types of flange by their long tapered hub. In addition, there is also a gentle transition of thickness in the region of the butt weld that joins them to pipe or a fitting. Weld Neck Flanges  or welding-neck flanges are best suited for severe service conditions, whether loading conditions are substantially constant or fluctuate between wide limits.

Weld Neck Flanges SPECIFICATION:

      Standard . ANSI/ASME : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 i

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628,DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

B.S: BS4504, BS4504, BS1560, BS10

Size: 1/2″ (15 NB) to 48″ (1200NB)

Class : 150 LBS, 3O0LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.

Specialize :ÅS per draving


Stainless Steel Weld Neck Flanges : ASTM A182, A240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 3105,321, 321H, 317, 347, 347H, 904L

Carbon Steel Weld Neck Flanges : ASTM I ASME A/SA 105 ASTMI ASME A 350 , ASTMA181LF 21 A516Gr.70 A36, A694 F42, F46, F52, F60, F65, F70

Alloy Steel Weld Neck Flanges : ASTM 1 ASME A/SA 182 & A387F1, F5, F9, F11, F12, F22, F91

Duplex Steel Weld Neck Flanges : ASTM 1 ASME A/SA 182F44, F45, F51,F53,F55, F60,F61

Super Duplex Weld Neck Flanges : ASTM 1 ASME A/SA 182, A240F44, F45, F51,F53,F 55,F60,F61

Nickel Alloy Weld Neck Flanges : Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel400 (UNS No. N04400), Monel 500 (UNS No, N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNSNo. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No.N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Gradel& Il)l

Copper Alloy Weld Neck Flanges : UNS No. C10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500,UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu-Ni-70/30)

Low Temperature Carbon Steel Weld Neck Flanges : ASTM A350, LF2, LF3