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ANSI DIN Carbon Steel Stainless Steel Lug Type Butterfly Valve 美标德标碳钢不锈钢凸耳式蝶阀
面议
ASME B16.34 Cast Steel Pressure Seal Bonnet Gate Valve 美标B16.34铸钢压力自密封闸阀
面议
Stainless Steel Pipe Fitting Valve 不锈钢管件阀门
面议
Needle Valve 针型阀
面议
Single Seat Double Seat Self Operated Control Valve 单座双座自动控制阀
面议
Disc Lever Float Type Steam TrapAdjustable Bimetal Plate Steam Trap Valve 阀瓣杆浮子式蒸汽可调双金属板蒸汽疏水阀
面议
Seamless Welded Pipe 无缝焊接管
面议
High Pressure American Standard Clamped Stainless Steel Plug Valve 美标高压夹紧不锈钢旋塞阀
面议
Y Type T Type Basket Valve Strainer Y型T型篮式阀过滤器
面议
Forged Steel Valve Y Type Strainer 锻钢阀门Y型过滤器
面议
Nps34 Cl800 Thread Bw Extended Port Gte Valve Nps34 Cl800螺纹加长端口闸阀
面议
Extended Stem Low Temperature Socket Welded Thread Flanged Forged Steel Gate Valve 加长阀杆低温承插焊螺纹锻钢闸阀
面议A Long Weld Neck Flange is an integral self-reinforcing Flange connection primarily for ASME Pressure Vessel applications. The neck height of the long weld neck flange is higher, which improves the rigidity and bearing capacity of the flange. Compared with butt-welded flanges, the welding workload is larger, the welding rod consumption is higher, and it cannot withstａnd high temperature and pressure, repeated bending and temperature fluctuations, but it is more convenient for on-site installation and can omit the process of welding seam scratching, which is more popular.
We GUTE is the manufacture that provide all kinds of steel flanges like Long Weld Neck Flanges, Plate flat Flanges, Weld Neck Flanges, Slip On Flanges, Socket Weld Flanges, and so on, and also other special flanges according to the client's requirement.
Long Weld Neck Flange LWN 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") |
| 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 | ||
LWN 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, 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 |
