How does a weld neck flanges work?
These pipe flanges connect by welding the pipe to the neck of the flange. This exchanges pressure from the rib to the line all things being equal. It likewise decreases the pressure focus from the foundation of the center point. Weld neck ribs are frequently utilized for applications where high tension is a factor.
Types of Weld Neck are as follows:
Long weld neck Flange : Long WN flange looks like the typical welding neck flange, but is considered to be elongated. It’s usually used as a nozzle for a column or barrel. You can also choose between the Equal LWN Barrel and LWN Heavy Barrel, which have a thick wall and their own shape.
Reducing Weld Neck Flange: It is also called reducing weld neck flange, because the flange neck has a reducing diameter that to weld to a smaller diameter pipe.
NW Long Weld Neck Flanges: This flange type is regarded as high-hub flanges, which were created so stress could be transferred to the pipe and decreasing the stress concentration at the bottom of the flange.

Where do we use a weld neck flange?
Weld neck flanges are used in applications where the conditions are severe and critical. Some of these conditions include high pressure, wide fluctuations in temperature and pressure, high temperature, fluids that are volatile and hazardous, and temperatures in the sub-zero range.
Specification of Weld Neck Flanges
- Size : 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
- Dimensions : ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS SP44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
- Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
- DIN : DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673
- BS : BS 4504, BS 4504, BS 1560, BS 10
- Pressure : PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160
- JIS : JIS B2220, JIS B2221, 5K, 10K, 16K, 20K, 30K, 40K, 63K
- Connect Type/ Flange Face Type : Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Small Male-Female (SMF)
Weld Neck Flanges Material & Grades
Stainless Steel Weld Neck Flanges :
ASTM A182, F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L, SMO 254
Duplex & Super Duplex Steel Weld Neck Flanges :
ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61 / Duplex 2205 – UNS S31803, UNS S32205 / Super Duplex 2507 – UNS S32750, UNS S32760
Hastelloy Weld Neck Flanges :
ASTM B/SB564, Hastelloy B2 – UNS No. N10665, Hastelloy B3 – UNS No. N010675, Hastelloy C4 – UNS No. N06455, Hastelloy C22 – UNS No. N06022, Hastelloy C276 – UNS No. N10276, Hastelloy C2000 – UNS No. N06200, Hastelloy X – UNS No. N06002
Inconel Weld Neck Flanges : ASTM B564, Inconel 600 – UNS No. N06600, Inconel 601 – UNS No. N06601, Inconel 625 -UNS No. N06625, Inconel 715, Inconel 718 – UNS No. N07718, Incoloy 800 / 800H /800HT – (UNS No. N08800 / N08810 / N08811), Incoloy 825 – UNS No. N08825, Incoloy 925 – UNS No. N09925
Monel Weld Neck Flanges :
ASME SB 564, Monel 400 – UNS No. N04400, Monel K500 – UNS No. N05500
Nickel Weld Neck Flanges : Nickel 200 – UNS No. N02200 , Nickel 201 – UNS No. N02201
Titanium Weld Neck Flanges :
ASTM B381 / ASME SB381, Grade 2 – UNS No. R50400, Grade 5 – UNS No. R56400
Alloy 20 Weld Neck Flanges :
ASTM B462 / ASME SB462, Grade 2 – UNS No. N08020
ANSI/ASME Weld Neck Flanges
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EN/PED Weld Neck Flanges
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BS Weld Neck Flanges
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JIS Weld Neck Flanges
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Flange Standard
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Other types of Weld Neck Flanges Stock
- UNS S31803 Duplex Steel Class 150 Weld Neck Flange
- Duplex S32205 Raised Faced Weld Neck Flanges
- Duplex 2205 BS4504 PN16 Weld Neck Flange
- 316L Stainless Steel Weld Neck Flanges
- SS 304L AWWA C207 Class E Weld Neck Flanges
- Inconel 625 Class 300 Weld Neck Flange
- Stainless Steel 304 Industrial Weld Neck Flanges
- Incoloy 800 Class 150 Weld Neck Flanges
- UNS S32750 Weld Neck Raised Faced Flanges
- ASME B16.5 SS 316L Weld Neck Flange Manufacturer
- Incoloy 825 Weld Neck Flange
- 600 Inconel EN 1092-2 PN16 Weld Neck Flange
- Super Duplex Steel S32760 Weld Neck Flanges
- Stainless Steel 316 Weld Neck Flanges
- Monel 400 Weld Neck Flange 600#
- SMO 254 Weld Neck Flanges Stockist
- ANSI B16.5 Stainless Steel 904L Weld Neck Flange
- Titanium Grade 2 JIS B2220 Weld Neck Flanges
- ASME B16.47 Stainless Steel Weld Neck Flanges
- Stainless Steel Weld Neck Flange Dimensions PN16
- Stainless Steel 446 Weld Neck Flange
- 321H Stainless Steel Weld Neck Flanges
- Large Diameter Weld Neck Flange Supplier
- Hastelloy C22 Weld Neck Flanges Supplier
- Titanium Gr 5 BS4504 PN16 Weld Neck Flanges
- ASTM A182 F347 SS BS 10 Table E Weld Neck Flange
- Inconel 718 Weld Neck Flange Dealers
- ASTM A182 F317 Stainless Steel Weld Neck Flange
- Hastelloy C276 JIS 5K Weld Neck Flanges
- Nickel Alloy 201 Weld Neck Flanges Exporter
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