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(gè)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(tǒng)輸送的流體不受限制流動(dòng)的高壓和高/低溫應(yīng)用中（凸棱的孔徑與導(dǎo)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(qiáng)可防止法蘭接頭附近金屬的湍流和侵蝕/腐蝕等負(fù)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(dǎo)管和焊頸凸棱之間平滑分布機(jī)械應(yīng)力，并有助于執(zhí)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(dǎo)管一覽表）應(yīng)與連接導(dǎo)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(jí)	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(zhì)	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(jī)加工
Manufacturing Standards/制造標(biāo)準(zhǔn)	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)