A welding neck flange (“WN”)features a long tapered hub that can be welded with a pipe.
焊接頸法蘭（“WN”）具有一個可與管道焊接的長錐形輪轂。

This flange type is used, normally, in high-pressure and high/low temperatures applications that require an unrestricted flow of the fluid conveyed by the piping system (the bore of the flange matches with the bore of the pipe).
這種凸棱類型通常用于需要管道系統輸送的流體不受限制流動的高壓和高/低溫應用中（凸棱的孔徑與導管的孔徑匹配）。

The absence of pressure drops prevents negative effects as turbulence and erosion/corrosion of the metals in the proximity of the flanged joints.
無壓強可防止法蘭接頭附近金屬的湍流和侵蝕/腐蝕等負面影響。

The tapered hub allows a smooth distribution of the mechanical stress between the pipe and the weld neck flange and facilitates the execution of radiographic inspections to detect possible leakages and welding defects.
錐形角皮凸允許在導管和焊頸凸棱之間平滑分布機械應力，并有助于執行射線照相檢查，以檢測可能的泄漏和焊接缺陷。

The dimension of the flange (NPS and the pipe schedule) shall match the dimension of the connecting pipe.
凸棱的量綱（北極星序和導管一覽表）應與連接導管的量綱匹配。

Weld Neck Flange Specification:

Size/尺寸	1/2" (15 NB) to 48" (1200NB)
Class/壓力等級	150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Flange Face Type/密封面形式	American Series: Flat Face(FF), Raised Face(RF), Tongue(T), Groove(G), Female(F), Male(M), Ring Joints Face(RJ) European Series: Type A(Flat Face), Type B(Raised Face), Type C(Tongue), Type D(Groove), Type E(Spigot), Type F(Recess), Type G(O-Ring Spigot), Type H (O-Ring Groove)
Surface Treatment/表面處理	Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized 防銹漆，油黑漆，黃色透明，鍍鋅，冷熱浸鍍鋅
Materal/材質	Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel 不銹鋼，合金鋼，雙相，鎳合金，低溫鋼，碳素鋼，銅鎳合金
Manufacturing process/制造工藝	Cutting, Heat treatment, Die Forging/Free Forging, CNC Machining 鋸切、熱處理、模鍛/自由鍛、CNC機加工
Manufacturing Standards/制造標準	ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673 BS4504 , BS4504, BS1560, BS10 HG/T20592-2015、HG/T20615-2015、GB/T9115.1-2000—GB/T9115.4-200、GB/T9115.1-2000、GB/T9115.4-2000

Weld Neck Flange Material Grades:

Stainless Steel/不銹鋼	ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Duplex & Super Duplex Steel/雙相鋼	ASTM A 182 – F51, F53, F55, S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950.
Carbon Steel/碳鋼	ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, 20#, Q235, 16Mn
Alloy Steel/合金鋼	ASTM / ASME A 182, ASTM / ASME F5, F9, F11,F22, F 91
Copper Alloy Steel/銅合金	Copper Alloy Steel Forged Threaded 90 Deg Elbow : ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 C 71500, ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)
Nickel Alloy/鎳合金	ASTM / ASME SB 336, ASTM / ASME SB 564 / 160 / 163 / 472, UNS 2200 (NICKEL 200) , UNS 2201 (NICKEL 201 ) , UNS 4400 (MONEL 400 ) , UNS 8020 ( ALLOY 20 / 20 CB 3 ) , UNS 8825 INCONEL (825) , UNS 6600 (INCONEL 600 ) , UNS 6601 (INCONEL 601) , UNS 6625 (INCONEL 625) , UNS 10276 (HASTELLOY C 276)