Harsh Metalloys, located in Mumbai, India, stands out as a leading manufacturer and supplier of high-quality Stainless Steel Blind Flanges. These flanges are expertly crafted to securely seal the ends of piping systems, effectively preventing flow while making maintenance and inspection a breeze. Made from top-notch stainless steel grades like 304, 316, 316L, and 904L, our blind flanges boast impressive corrosion resistance, strength, and durability. With a variety of sizes and pressure ratings available, they meet international standards such as ASME B16.5 and ANSI. Harsh Metalloys proudly serves sectors including oil & gas, petrochemical, power generation, and water treatment.
Stainless Steel Blind Flanges are crafted from austenitic stainless steels, featuring Chromium content ranging from 18–25% and Nickel content between 8–22%. Grades like 316 and 904L are enhanced with Molybdenum to provide superior resistance to pitting and chemical corrosion. These flanges deliver tensile strengths between 485 to 620 MPa and yield strengths from 170 to 310 MPa. Their sturdy construction and corrosion resistance guarantee a long lifespan even under high pressure, temperature, and harsh chemical conditions. Plus, the material’s excellent weldability and oxidation resistance make these flanges perfect for sealing pipe ends in challenging applications.
| 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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We provide complete documentation for our Stainless Steel Blind Flanges so that our customers enjoy a seamless experience. Our entire package comprises a commercial invoice, packing list, fumigation certificate, heat treatment chart, quality assurance plan, and an NABL-approved lab test report. We also extend providing test certificates such as MTC, PMI Test Certificates, radiography test reports, and Third-Party Inspection Certificates for our Stainless Steel Blind Flanges. All these accreditations confirm that our products are of high quality and hence reliable and satisfying concerning customer demand.
A Stainless Steel Blind Flange is a solid plate used to seal or close pipeline ends, ensuring leak-proof connections.
They are commonly used in chemical processing, power generation, oil and gas, and marine industries for high-pressure and corrosion-resistant applications.
Yes, they are available in various grades, sizes, and finishes and can be customized to meet specific project requirements.
Documents include commercial invoices, packing lists, MTC, PMI Test Certificates, radiography reports, and Third-Party Inspection Certificates to ensure quality assurance.
Stainless Steel Blind Flanges are primarily used to close or seal the end of a piping system, ensuring safety during inspection, maintenance, or system shutdowns. They are widely employed in oil & gas pipelines, chemical processing plants, water treatment facilities, and power generation systems. Their corrosion resistance and mechanical strength make them suitable for harsh environments involving high pressure and temperature. Blind flanges also provide easy access points for future expansion or modifications. These flanges are essential for isolating pipe sections, preventing fluid flow, and ensuring leak-proof sealing in critical industrial systems.
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