Harsh Metalloys is a trusted manufacturer and supplier of Stainless Steel Weld Neck Flanges based in Mumbai, India. Known for precision engineering and durability, our weld neck flanges are designed to handle high-pressure and high-temperature environments. These flanges feature a long tapered hub that provides excellent stress distribution, making them ideal for critical piping systems. We offer flanges in various stainless steel grades such as 304, 304L, 316, 316L, 321, 347, and 904L, conforming to global standards like ASME, ASTM, and DIN. Our products are widely appreciated for their corrosion resistance, structural integrity, and long service life
Stainless Steel Weld Neck Flanges are typically made from austenitic stainless steel, primarily consisting of chromium (18–20%) and nickel (8–12%), with variations including molybdenum (in 316/316L) for enhanced corrosion resistance. They exhibit high tensile strength (around 515–620 MPa), yield strength (205–275 MPa), and excellent elongation properties. The flanges are known for their excellent weldability, toughness at cryogenic temperatures, and resistance to pitting and crevice corrosion. Their unique neck design ensures uniform stress distribution, reducing the likelihood of failure in high-stress piping connections.
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings. |
| Pressure Ratings | PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Pressure class | 150#, 300#, 600#, 1500# |
| Dimensions and Pressure Ratings for Blind Flanges | MSS- SP-44, BS3293, ANSI, Table D, E, F, & H, BS4504, PN6, 10, 16, 25, 64 BS10, DIN Standards |
| Flange Face Type Manufacturer | Raised Face (RF), Flate Face (FF), Ring Type Joint (RTJ) |
| Coating/Surface Treatment | Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized. |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
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| Manufacturer of | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. Blind Flange: -BS, EN, API 6A, ANSI, ASME, DIN, EN1092-1, UNI, JIS/ KS , BS4504, GB, AWWA C207, GOST, PSI
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Discover precision-engineered flanges that provide robust, leak-proof connections for high-pressure piping systems, commonly found in the oil, gas, and petrochemical industries.
These flanges are crafted to meet MSS-SP-44 standards, making them perfect for high-strength applications in pipelines and refineries that demand reliable, pressure-resistant connections.
With a PN16 pressure class rating, these flanges are well-suited for moderate pressure piping systems used in water treatment, HVAC, and various industrial applications.
The raised face design improves gasket sealing, which makes these flanges particularly effective for high-pressure and high-temperature scenarios across different industrial systems.
Forged for exceptional strength and durability, these weld neck flanges are ideal for high-stress environments, including power plants and offshore installations.
Manufactured according to JIS standards, they ensure a precise fit and corrosion resistance for piping systems in marine, chemical, and industrial sectors.
Stainless Steel Weld Neck Flanges are widely used in industries that demand robust and long-lasting pipe connections. These include oil & gas, petrochemical, power generation, chemical processing, marine, and offshore applications. The tapered neck of the flange provides enhanced reinforcement and reduces stress concentration at the base of the flange. Ideal for high-pressure, high-temperature, and corrosive environments, they ensure secure, welded joints for fluid and gas transfer. Harsh Metalloys offers SS weld neck flanges in multiple pressure ratings and sizes to suit customized project requirements, ensuring safety, precision, and long-term reliability in critical infrastructure systems.







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