Zhejiang Daye Flange Co., Ltd. is one of the leading manufacturers and suppliers of f316l long welding neck flange in China. With abundant experience, we are committed to providing high quality flanges made in China with competitive price. We warmly welcome you to buy durable f316l long welding neck flange in stock here from our factory. Also, quotation is available.
Long welding neck flange (LWN) is a special variant of standard welding neck flange (WN). It shares the same structural design as WN flange, with the only difference being a longer hub.
Benefiting from the extended hub, stress can be distributed more evenly when connected to piping. It delivers superior pressure-bearing performance compared with standard WN flanges. Therefore, LWN flanges are widely applied in stringent piping services such as high temperature and high pressure conditions.
Our LWN flanges are machined from premium stainless steel forgings with a wide range of material options, including stainless steel and duplex steel. Among them, F304 and F316L long welding neck flanges are our best-selling products. These materials feature good corrosion resistance, ensuring long service life and stable piping connections.
Parameters
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Standard: |
According to the drawing, Asme B16.5, NB/T 47023 |
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Certifications: |
PED/CE,ISO9001, ISO 45001, ISO14001 |
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Size: |
1/2"-160"/Dn10-Dn4000 |
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Rating: |
Class150-Class2500/Pn6-Pn100 |
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Material: |
Stainless steel: 304/304L, 316/316L,321, 316Ti, 347/347H, 310S Super stainless steel: 254SMO/F44, 904L Duplex steel: F51/2205, F53/2507 Special alloy steel:Inconel(625, 600, 718, 750, 601), Hastelloy(276, C-22, C-4,C, X, B-2), Monel(400,500), Incoloy(800, 825, 020, 028, 925),etc |
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Facing: |
RF/RJ/MFM/TG/FF |
Product Advantage
Excellent pressure bearing performance
The extended hub optimizes stress distribution and delivers outstanding pressure resistance.
Better controllability of welding quality
The weld end is far away from the flange sealing face, reducing the thermal impact on the sealing surface.
Applications
High temperature and high pressure service
Service with frequent pipeline start-stop and temperature fluctuations
Test
Mill certificate,100%PMI,Tensile Test,Hardness Test,Impact Test,IC Test,etc.it depends on the requirements.
Cerfitications
PED
PED
ISO 45001
ISO 9001
ISO 14001
Process
Packaging
Outer Packaging:
Fumigated wooden crates/Fumigation-free plywood crates/Customized wooden crates
Inner Packaging:
Plastic flange protectors/Bubble wrap/Cardboard/Protective paper
Packaging can be customized to meet your specific requirements.
FAQ
Q: Does the long welding neck flange have a standard fixed hub length, or is it fully customized?
A: In China, NB/T 47023 specifies standard hub dimensions. International standards do not define a unified standard hub length. Custom production is required based on customer drawings or specified hub parameters.
Q: Under what service conditions are A182 F316L long welding neck flanges recommended?
A: F316L long welding neck flanges are recommended for media with low chloride content, as F316L has limited resistance to chloride corrosion.
They are particularly suitable for pressure vessels requiring strict tightness and subject to frequent fluctuations in pressure and temperature.
Q: What is the MOQ?
A: We don't have MOQ,but the more quantity,the price lower.
Q: What are your payment terms?
A: Perfer TT,L/C also acceptable.
Q: What surface finish do you provide?
A: 125-150AARH/,we can also customize accoding to your requirements.
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