20 Inch Weld Neck Flange

20 Inch Weld Neck Flange

Attribute Details
Product Name 20 Inch Weld Neck Flange
Nominal Pipe Size (NPS) 20 Inch (DN500)
Material Stainless Steel: ASTM A182 F304, F304L, F316, F316L, F321, F347
Carbon Steel: ASTM A105, ASTM A350 LF2
Alloy Steel: ASTM A182 F11, F22, F5, F9
Duplex & Super Duplex: UNS S31803, S32205, S32750, S32760
Nickel Alloy: Monel 400, Inconel 600/625/718, Hastelloy C276/C22
Pressure Rating Class 150, 300, 600, 900, 1500, 2500
Standard ASME B16.5
Face Type Raised Face (RF) / Flat Face (FF) / Ring Type Joint (RTJ)
Applications Oil & Gas, Petrochemical, Refinery, Power Plants, Offshore & Industrial Pipelines
Category:

A 20 Inch Weld Neck Flange is designed for heavy-duty, large-diameter piping systems operating under extreme pressure and temperature conditions. Featuring a long tapered hub, this flange ensures smooth stress transition between the pipe and flange, significantly reducing the risk of cracking and fatigue failure. Manufactured in accordance with ASME B16.5, it provides dimensional accuracy, strong butt-weld connections, and leak-proof sealing performance.

The weld neck design improves flow characteristics by minimizing turbulence and erosion within the pipeline. This makes the 20 Inch Weld Neck Flange ideal for critical applications in oil & gas, petrochemical plants, refineries, offshore platforms, power generation, and marine industries. Available in multiple material grades and pressure classes, it offers excellent mechanical strength, corrosion resistance, and long operational life even in aggressive environments.

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