Weld neck flanges are the most popular flange type with a neck extension with a weld bevel at the end. This type of flange is designed to butt weld directly to the pipe to provide a superior and relatively natural form connection. The butt welding WN flange is not easy to deform, it has good sealing, and is widely used. 
We HT PIPE is the manufacture that provide all kinds of steel flanges like Weld neck Flanges, Blind Flanges, Plate flat Flanges, LWN Flanges, Slip On Flanges, Socket Weld SW Flanges, and so on, and also other special flanges according to the client's requirement.
Welding Neck WN Flange Specification:
| Standard |
Type |
Class |
Size |
| ASME B16.5 |
WN/LWN/SO/Blind/Lap Joint |
150#-2500# |
1/2"-24"(Except Blind Flange 2500lb 1/2"-12") |
| ASME B16.47 Series A |
WN/blind flange |
150# -900# |
22"-48"(Except 900# Size:26"-48") |
| ASME B16.47 Series B |
WN/blind flange |
75#-300# |
26"-48" |
| 400# 600# 900# |
26"-36" |
| EN1092-1:2002 |
Plate flange for welding/loose plate
flange with weld-on plate collar or
for lapped pipe end/Blind/WN flange |
PN2.5-PN100 |
DN10-DN4000 |
| JIS B2220 |
Welding Flange, Lap joint flange, threaded flange |
PN6-PN100 |
DN10-DN1500 |
| BS4504 BS10 TableD/E |
Plate Flange for welding/WN flange/Blank Flange |
PN6-PN100 |
DN10-DN1500 |
| Sealing Surface |
RF FF RTJ TF GF LF LM |
| Flange Face Finish |
Stock Finish/Spiral Serrated/Concentric Serrated/Smooth Finish(Ra 3.2 and 6.3 micrometers) |
| 125-250 AARH(it is called smooth finish) |
| 250-500 AARH(it is called stock finish) |
| Coating |
Vanish, yellow paint, anti-rust oil, galvanizing etc |
Welding Neck WN Flange dimensions:
WN Flange Material Grades:
| Carbon Steel |
ASTM /ASME A/SA105(N), A350 LF2/LF3, A694 F52, F56, F60, F65, F70 |
| Alloy Steel |
ASTM/ASME A/SA 182 F5, F9, F11, F22, F91 |
| Stainless Steel |
ASTM/ASME A/SA 182 F304, 304L, 304H, 310H, 316, 316H,
316L, 316LN, 316Ti, 317, 317L, 321, 321H, 347, 347H, 904L |
Duplex and
Super Duplex |
ASTM/ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61,
S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950 |
| Nickel Alloy Steel |
ASTM/ASME B/SB 564 UNS N02200(NICKEL 200), UNS N04400, (MONEL 400)
UNS N08825( INCOLOY 825), UNS N06600(INCONEL 600), UNS N06601(INCONEL 601),
UNS N06625(INCONEL 625), UNS N10276(HASTELLOY C276) |
| ASTM/ASME B/SB160 UNS N02201(NICKEL 201), ASTM B/SB472 UNS N08020(Alloy 20) |
| Copper Alloy |
ASTM/ASME B/SB151 UNS N07060, 71500, C70600(CuNi 90/10), C71500(CuNi 70/30) |
| Titanium |
ASTM/ASME B/SB381 Grade 2, Grade 5, Grade 7 |
Manufacturer, exporter & supplier of ASME/ANSI B16.5 Carbon steel Weld neck Flanges, Alloy steel Weld neck Flanges, Nickel alloy steel Weld neck Flanges, Stainless steel Weld neck Flanges, Duplex steel Weld neck Flanges, ASTM A105/105N, ASTM A350 Lf2, ASTM A694, ASTM A182, ASTM B564 Weld neck Flanges manufaturer in Zhengzhou HT PIPE.
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