Weld Neck Flanges – High-Strength Steel Flanges for High-Pressure & Temperature Piping Systems
Weld Neck Flanges are designed with a long tapered hub that is butt-welded to a pipe, providing superior strength, durability, and stress distribution in high-pressure and high-temperature applications. These flanges are ideal for critical piping systems in oil & gas, petrochemical, chemical, water, and industrial sectors.
Manufactured from carbon steel, stainless steel, alloy steel, and galvanized steel, weld neck flanges are available in various pressure classes, diameters, and thicknesses, making them suitable for both industrial and infrastructure projects.
- Description
Description
Product Range / Variants
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Standard Weld Neck Flange
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Stainless Steel Weld Neck Flange (SS 304, 316, 202)
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Carbon Steel Weld Neck Flange
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Alloy Steel Weld Neck Flange (P11, P22, P91)
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Galvanized Iron (GI) Weld Neck Flange
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Heavy-Duty / High-Pressure Weld Neck Flange
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Custom Fabricated Weld Neck Flanges
Specifications
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Sizes: ½” to 48″ (DN15 to DN1200)
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Pressure Ratings: 150#, 300#, 600#, 900#, 1500#, 2500#
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Standards: ASME B16.5, ASME B16.47, ASTM A105, ASTM A182, DIN, ISO
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Connection: Butt Weld
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Material Options: Carbon Steel, Stainless Steel, Alloy Steel, GI
Key Features
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Long tapered hub for superior stress distribution
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High strength for high-pressure and high-temperature applications
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Excellent corrosion and chemical resistance depending on material grade
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Precise dimensions for perfect fit and leak-proof sealing
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Smooth bore for unobstructed flow
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Compatible with various gaskets and piping systems
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Long service life and durable performance
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Available in multiple sizes, thicknesses, and pressure classes
Applications
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Oil & gas pipelines and refineries
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Chemical & petrochemical plants
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Power generation and boiler systems
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Water treatment and distribution pipelines
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HVAC and chilled water piping
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Food & pharmaceutical processing
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Firefighting & sprinkler systems
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Marine & offshore piping projects
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Industrial fluid and slurry transport systems
Material Grades Available
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Carbon Steel: ASTM A105, ASTM A182 F1 / F11 / F22
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Stainless Steel: SS 304, 304L, 316, 316L, 202
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Alloy Steel: ASTM A335 P11, P22, P91
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Mild Steel (MS)
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Galvanized Iron (GI)
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Duplex & Super Duplex Steel
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Nickel Alloys: Inconel, Monel, Hastelloy
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