Vishal Flanges stands out as a top-notch manufacturer and supplier of Stainless Steel Long Weld Neck Flanges, proudly based in Delhi, India. They specialize in crafting high-quality flanges that are perfect for critical and high-pressure applications. What sets long weld neck flanges apart from the standard ones is their extended neck, which serves as a boring extension, offering extra reinforcement and support. Made from premium stainless steel grades like SS 304, 304L, 316, and 316L, these flanges boast impressive resistance to corrosion, high temperatures, and mechanical stress. Vishal Flanges ensures that their products meet ASME, ANSI, and other international standards, catering to industries such as power, petrochemical, oil & gas, and shipbuilding.
Stainless Steel Long Weld Neck Flanges are usually manufactured using alloys like 304, 316, or 316L stainless steel, which provide superior corrosion resistance. These flanges have 18-20% chromium and 8-12% nickel content, with some grades having molybdenum (2-3%) for enhanced resistance to chloride corrosion. Mechanical characteristics are yield strength of 205–290 MPa and tensile strength of 520–750 MPa. Long Weld Neck Flanges provide optimal stress distribution and perform best under high-temperature and high-pressure environments, providing secure, leak-proof connections in critical industries like power generation, oil and gas, and chemical processing.
Stainless Steel Long Weld Neck Flanges are crafted from SS 304, 304L, 316, and 316L, featuring compositions that include 18–20% chromium, 8–14% nickel, and 2–3% molybdenum in the 316/316L grades for enhanced corrosion resistance. These flanges demonstrate a tensile strength ranging from 485–620 MPa and a yield strength of 170–310 MPa. They are known for their excellent weldability, oxidation resistance, and dimensional stability even at high temperatures. The unique extended neck design helps distribute stress effectively, making them ideal for high-pressure environments that demand durability, structural integrity, and reliable, leak-proof performance.
| Specification | ASTM A182 / ASME SA182 |
|---|---|
| Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
| Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production Technique | Forged, Heat treated and machined |
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove |
| Special design | As per your drawing AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Manufacturer of | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange B.S: BS4504 , BS3293, BS1560, BS10 AS 2129: Table D; Table E; Table H ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48 ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 American standard (ANSI) German (DIN) British standard (BS) DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 ASTM A182 F316 Stainless Steel Flanges The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
| Grades | SS 304, 304L, 304H, 310, 310S, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 446, 904L |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Vishal Flanges, a premier supplier in Delhi, India, specializes in high-quality Stainless Steel Long Weld Neck Flanges, valued for their exceptional durability, corrosion resistance, precise engineering, and suitability across diverse industrial applications.
Stainless Steel Long Weld Neck Flanges find extensive application in high-temperature and high-pressure processes in various industries such as petrochemical, oil and gas, power generation, and chemical processing. Long necked design gives extra strength and better stress distribution, making them suitable for joining pipes in systems where the conditions are severe. Long Weld Neck Flanges are frequently used in applications such as pressure vessels, boilers, and heat exchangers. They provide superior corrosion, oxidation, and chemical attack resistance, with long-term performance in aggressive environments. Long Weld Neck Flanges are necessary in applications where reliability, durability, and accurate alignment are needed.
| ASME/ANSI B 16.5 | Long Weld Neck Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Long Weld Neck Flange [Series A & B],Welding Neck Flange |
| PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | Long Weld Neck Flange |
| PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
| PRESSURE CLASS | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | Hubbed Slip-On |
| PRESSURE CLASS | PN 2.5 TO PN 400 |
| BS 1560 BOSS | Hubbed Slip-On Hubbed Threaded |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | Plate Slip-On Flange, Slip-On Boss Flange |
| TABLE | D, E, F, H |
| DIN FLANGES | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| PRESSURE CLASS | PN 6 TO PN 100 |
Yes, we offer custom sizes for Stainless Steel Long Weld Neck Flanges to meet specific project needs. Our team at Vishal Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@vishalflanges.co.in.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Stainless Steel Long Weld Neck Flanges are perfect for high-pressure, high-temperature, and high-stress applications, especially in pressure vessels, heat exchangers, boilers, and reactor systems. Their elongated neck allows for a smooth transition of stress, making them suitable for systems that experience repeated thermal or mechanical cycling. These flanges find extensive use in the oil & gas, chemical, power generation, marine, and pharmaceutical sectors. Their corrosion resistance and structural strength make them dependable in harsh and corrosive environments, while the extended neck ensures precise alignment and effective load distribution.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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