LWN / Long Welding Neck Flange

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1. The production process of our long welding neck flange contains the sectioning, forging, solution treatment, fine machining, drilling, quality testing, etc.
2. The high quality neck part shows good mechanical stiffness and load capability.
3. Compared with the butt welding flange, this product has higher electrode consumption.
4. The installation of our product can be fairly easy
5. The customization service about the product is available, and the selling price will be fair.


Technical Parameters
Nominal diameter 3/8"~80" (DN10~DN2000)
Nominal pressure CLASS150~CLASS2500 (US)
PN6~PN420 (EU)
Production standard GB/T9112-2000
GB/T9113.1-2000, GB/T9113.2-2000,GB/T9113.3-2000,GB/T9113.4-2000
HG/T20592-2009, HG/T20614-2009
HG/T20615-2009, HG/T20623-2009, HG/T20635-2009
ASME B16.5-2009,ASME B16.47-2006
MSS SP 44-2006
CSA Z245.12-05-2005
EN1092-1-2007, EN1759-1-2004
BS1560-3.1-1989, BS4504-3.1-1989
AFNOR NF E29-200-1-2007
JIS B2220-2004.

Structural Diagram

As a specialized LWN / long welding neck flange manufacturer and supplier in China, our company also provides TH / threaded pipe flange, SO / slip on flange, spectacle blind flange, and SW / socket weld flange, among others.

Related Names: Long Weld Neck Flange | Long WN Flange | LWN Flange | High Hub Flange

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