Manufactures & Suppliers of Pipes, Tubes, Flanges, Pipe Fitting & Fasteners
Flanges
Natron Steel is a recognized manufacturer and supplier of high-quality flanges in the Indian steel market, particularly in Mumbai. We specialize in producing a wide variety of industrial pipe flanges, including NPT flanges and PN16 flanges, with sizes ranging from ½” NB to 48” NB. Our NPT flanges are essential components in piping systems, providing reliable connections for pipes, tees, elbows, reducers, valves, and other piping equipment. Natron Steel ensures the use of premium materials to manufacture durable and high-performance NPT flanges in India.
Industrial Pipe Flanges, Custom Flange, UNI Flange And ISO Flange, Compact Flanges, Industrial MS and SS Flanges Supplier in Mumbai, India
Our extensive range includes popular flange types such as Forged Flanges, Weld Neck Flanges, Threaded Flanges, Slip-On Flanges, and Blind Flanges. These flanges are widely utilized across diverse industries, including petrochemical facilities, refineries, pharmaceutical plants, oil and gas transportation, power generation, marine engineering, and wastewater treatment. A Blind Flange, for instance, is commonly used to cover or close off the end of a pipe securely.
As a trusted supplier, Natron Steel provides various flange types, including Industrial Pipe Flanges, Compact Flanges, Industrial MS Flanges, Split Flanges, UNI Flanges, DIN PN10 Flanges, ISO Flanges, grooved flanges, PN6 Flanges, and associated gaskets. Our flanges are exported globally to regions like the United States, UAE, Iran, Saudi Arabia, Chile, Europe, Colombia, Indonesia, Vietnam, Singapore, Sri Lanka, Turkey, Russia, Malaysia, Brazil, Mexico, South Africa, Tunisia, Jordan, and Thailand.
Flanges Specifications
| Flanges Sizes | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
|---|---|
| Flanges 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 |
| Flanges Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Flanges |
| Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Flanges |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Flanges |
| Most common types of Flanges | Forged / Threaded / Screwed / Plate |
| Flanges Manufacturers in india |
ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
|
| Flanges Uses & application |
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| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production technique |
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| JIS Flanges | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Flanges |
| UNI Flanges | 6Bar 10Bar 16Bar 25Bar 40Bar Flanges |
| EN Flanges | 6Bar 10Bar 16Bar 25Bar 40Bar Flanges |
| Connect Type/ Flanges 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 |
| Flanges Special design |
As per your drawing AS, ANSI, BS, DIN and JIS |
| 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 |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Export to | Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 |
Flanges by Natron Steel are crafted as forged or cast steel rings that enable mechanical connections between pipe sections or secure piping to pumps, valves, pressure vessels, and other equipment. We offer Stainless Steel Flanges, Carbon Steel Flanges, and Alloy Steel Flanges that facilitate easy access for modifications, cleaning, or inspections. Our products are available in various shapes, pressure ratings, weights, dimensions, sizes, and specifications, adhering to ANSI/ASME, EN, BS, and DIN standards. Designed to meet specified pressure ratings—such as 150lb, 300lb, 400lb, 600lb, 900lb, 1500lb, and 2500lb—Natron Steel flanges are joined by bolting and connected to piping systems through threading or welding, ensuring reliable and secure performance.
Flanges Pressure Rating & Standards
| ASME/ANSI B 16.5 | Welding Neck Flange, Slip on Flange, Blind Flange, High Hub Blind, Socket Weld, Lap Joint, Threaded Flange, Ring Type Joint |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Welding Neck, Blind Flange [Series A & B] |
| PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | Welding Neck, Slip on Flange, Threaded Flange |
| PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
| BS 4504 SEC 3.1 | Welding Neck, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, Plate, Loose Plate, Loose Plate With Weld Neck , Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 400 |
| BS 1560 BOSS | Welding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind 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 |
Type Of Flanges
| Flanges Class 150 | Flanges Threaded |
| Flanges Class 300 | Flanges With 1/2 Npt |
| Flanges Class 1500 | Flanges With Threaded Hole |
| Flanges Class 600 | Flanges Weight 150# |
| Flanges Class 900 | Flanges Rtj 1500 |
| Flanges Class 2500 | Flanges Ring Type Joint |
| Flanges Pn16 | Flanges Flat Face |
| Flanges Pn10 | Flanges Slip On |
| Flanges Pn40 | Flanges Rtj 900 |
| Flanges Pn 160 | Flanges Rtj |
| Flanges Pn 64 | Flanges Npt |
| Flanges Dn150 Pn16 | Flanges Jis 5k |
| Flanges Din 2527 | Flanges Jis B2220 |
| Flanges Din En 1092-1 | Flanges Jis 10k |
| Flanges Din 2633 | Kf Flanges |
| Flanges Din 2576 | Flanges B16.47 |
| Flanges Asme B16.5 Class 300 | Flanges Ansi B16.5 150 |
Flanges Dimensions Chart with Diagram
| DN (inch) |
Dimension | ANSI B16.5 Flange Dimensional Sizes 3 to 10 inches Table Chart | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 125 lbs 150 lbs |
300 lbs | 400 lbs | 600 lbs | 900 lbs | 1500 lbs | 2500 lbs | ||||||||||
| inch | mm | inch | mm | inch | mm | inch | mm | inch | mm | inch | mm | inch | mm | |||
| 3 | A | 7 1/2 | 190.5 | 81/4 | 209.6 | 81/4 | 209.6 | 8 1/4 | 209.6 | 9 1/2 | 241 | 10 1/2 | 267 | 12 | 305 | |
| b | 15/16 | 23.8 | 1 1/8 | 28.6 | 11/4 | 31.8 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 1 7/8 | 47.6 | 2 5/8 | 66.7 | ||
| D2 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | ||
| D1 | 6 | 152.4 | 6 5/8 | 168.3 | 6 5/8 | 168.3 | 6 5/8 | 168.3 | 71/2 | 190.5 | 8 | 203 | 9 | 228.6 | ||
| n | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| d | 3/4 | 19 | 7/8 | 22.2 | 7/8 | 22.2 | 7/8 | 22.2 | 1 | 25.4 | 1 1/4 | 31.8 | 1 3/8 | 34.9 | ||
| 3 1/2 | A | 8 1/2 | 215.9 | 9 | 228.6 | 9 | 228.6 | 9 | 228.6 | - | - | - | - | - | - | |
| b | 15/16 | 23.8 | 13/16 | 30.2 | 13/8 | 34.9 | 13/8 | 34.9 | - | - | - | - | - | - | ||
| D2 | 5 1/2 | 139.7 | 5 /2 | 139.7 | 5 1/2 | 139.7 | 5 1/2 | 139.7 | - | - | - | - | - | - | ||
| D1 | 7 | 177.8 | 7 1/4 | 184.2 | 7 1/4 | 184.2 | 7 1/4 | 184.2 | - | - | - | - | - | - | ||
| n | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | - | - | - | - | - | - | ||
| d | 3/4 | 19 | 7/8 | 22.2 | 1 | 25.4 | 1 | 25.4 | - | - | - | - | - | - | ||
| 4 | A | 9 | 228.6 | 10 | 254 | 10 | 254 | 10 3/4 | 273 | 11 1/2 | 292 | 12 1/4 | 311 | 14 | 356 | |
| b | 15/16 | 23.8 | 1 1/4 | 31.7 | 1 3/8 | 34.9 | 1 1/2 | 38.1 | 1 3/4 | 44.4 | 2 1/8 | 54 | 3 | 76.2 | ||
| D2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | ||
| D1 | 7 1/2 | 190 | 7 7/8 | 200 | 7 7/8 | 200 | 8 1/2 | 215.9 | 9 1/4 | 235 | 9 1/2 | 241 | 10 3/4 | 273 | ||
| n | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| d | 3/4 | 19 | 7/8 | 22.2 | 1 | 25.4 | 1 | 25.4 | 1 1/4 | 31.8 | 1 3/8 | 34.9 | 1 5/8 | 41.3 | ||
| 5 | A | 10 | 254 | 11 | 279.4 | 11 | 279.4 | 13 | 330.2 | 13 3/4 | 349 | 14 3/4 | 375 | 16 1/2 | 419 | |
| b | 1 5/16 | 23.8 | 13/8 | 34.9 | 1 1/2 | 38.1 | 1 3/4 | 44.4 | 2 | 50.8 | 2 7/8 | 73 | 3 5/8 | 92.1 | ||
| D2 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | ||
| D1 | 8 1/2 | 215.9 | 9 1/4 | 234.9 | 9 1/4 | 234.9 | 10 1/2 | 266.7 | 11 | 279 | 11 1/2 | 292 | 12 3/4 | 324 | ||
| n | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| d | 7/8 | 22.2 | 7/8 | 22.2 | 1 | 25.4 | 1 1/8 | 28.6 | 1 3/8 | 34.9 | 1 5/8 | 41.3 | 1 7/8 | 47.6 | ||
| 6 | A | 11 | 279 | 12 1/2 | 317.5 | 12 1/2 | 317.5 | 14 | 355.6 | 15 | 381 | 15 1/2 | 394 | 19 | 483 | |
| b | 1 | 25.4 | 17/16 | 36.5 | 1 5/8 | 41.3 | 1 7/8 | 47.6 | 2 3/16 | 55.6 | 3 1/4 | 82.6 | 4 1/4 | 108 | ||
| D2 | 8 1/2 | 216 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 216 | ||
| D1 | 9 1/2 | 241 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 11 1/2 | 292.1 | 12 1/2 | 318 | 12 1/2 | 318 | 14 1/2 | 368 | ||
| n | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 8 | 8 | ||
| d | 7/8 | 22.2 | 7/8 | 22.2 | 1 | 25.4 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 2 1/8 | 54 | ||
| 8 | A | 13 1/2 | 342.9 | 15 | 381 | 15 | 381 | 16 1/2 | 419 | 18 1/2 | 470 | 19 | 482.6 | 21 3/4 | 552 | |
| b | 1 1/8 | 28.6 | 1 5/8 | 41.3 | 1 7/8 | 47.6 | 2 3/16 | 55.6 | 2 1/2 | 63.5 | 3 5/8 | 92.1 | 5 | 127 | ||
| D2 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | ||
| D1 | 11 3/4 | 298.4 | 13 | 330.2 | 13 | 330.2 | 13 3/4 | 349.2 | 15 1/2 | 394.2 | 15 1/2 | 394.2 | 17 1/4 | 438 | ||
| n | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | ||
| d | 7/8 | 22.2 | 1 | 25.4 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 1 3/4 | 44.5 | 2 1/8 | 54 | ||
| 10 | A | 16 | 406.4 | 17 1/2 | 444.5 | 17 1/2 | 444.5 | 20 | 508 | 21 1/2 | 546 | 23 | 584 | 26 1/2 | 673 | |
| b | 1 3/16 | 30.2 | 1 7/8 | 47.6 | 2 1/8 | 54 | 2 1/2 | 63.5 | 2 3/4 | 69.8 | 4 1/4 | 108 | 6 1/2 | 165 | ||
| D2 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | ||
| D1 | 14 1/4 | 361.9 | 15 1/4 | 387.4 | 15 1/4 | 387.4 | 17 | 431.8 | 18 1/2 | 470 | 19 | 482.6 | 21 1/4 | 540 | ||
| n | 12 | 12 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 12 | 12 | 12 | 12 | ||
| d | 1 | 25.4 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 3/8 | 34.9 | 1 1/2 | 38.1 | 2 | 50.8 | 2 5/8 | 66.7 | ||
