Khawla Flanges stands out as a top manufacturer and supplier of GOST 12821-80 Flanges in Muscat, Oman. We pride ourselves on delivering high-precision and durable flange solutions that adhere to strict Russian industrial standards. Our GOST 12821-80 Welded Neck Flanges are specifically crafted for high-pressure and high-temperature piping systems, guaranteeing exceptional strength, reliability, and leak-proof connections. With state-of-the-art production facilities and rigorous quality assurance practices, Khawla Flanges serves critical sectors like oil and gas, petrochemicals, energy, and water treatment. We are dedicated to providing superior performance, corrosion resistance, and long-lasting durability, making us a trusted partner for GOST-compliant piping components.
GOST 12821-80 Flanges are generally made from top-notch carbon steel, alloy steel, or stainless steel grades, incorporating elements like carbon, manganese, silicon, chromium, and nickel. These materials ensure excellent strength, weldability, and resistance to corrosion. Mechanically, the flanges boast high tensile and yield strength, along with impressive impact resistance, making them ideal for high-pressure and high-temperature applications. The welded neck design enhances structural stability and promotes optimal stress distribution within piping systems. GOST 12821-80 Flanges are recognized for their durability, toughness, and reliable performance in challenging industrial settings.
| Standard | GOST / ГОСТ 12821-80 |
| Size | 1/2″ to 48″ |
| UNI | 6Bar 16Bar 10Bar 25Bar 40Bar |
| Class | 300 LBS, 150 LBS, 900 LBS, 600 LBS, 1500 LBS, 2500 LBS |
| EN | 6Bar 25Bar 10Bar 40Bar 16Bar |
| Flanges Face Type Provided By Manufacturer | RF (Raised Face), RTJ (Ring Type Joint) |
| BS | BS4504 , BS4504, BS1560, BS10 |
| Value Added Services | CNC Machining, Customised Flanges |
| Outer diameters | 1/2” to 24” |
| Making Methods Provided By Manufacturer | Casting And Forging Rolling And Cutting |
| JIS | 5K, 16 K 10 K, 20 K, 40 K, 30 K, 63 K |
| Flanges Test | Hydrostatic testing machine/ UI trasonic flaw detector/ X-ray detector/ Direct-reading Spectrograph/ Magnetic particle detector |
| Coating/Surface Treatment By Manufacturer | Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized |
| Flanges Equipment | Pushing Machine/ electric bevelling machine/ Press machine/ Bending machine/ Sand-blasting machine etc |
| Standards Provided By Manufacturer | BS4504, BS 10, API7S-15, JISB2220, BS1560-3.1, ANSI/ASME B16.5/16.36/16.47A/16.47B, EN1092, DIN, API7S-43, API605, B16.48, ISO70051, MSS S44 |
Khawla Flanges a leading supplier in Muscat, OMAN, offers an extensive selection of GOST 12821-80 Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
GOST 12821-80 Flanges find extensive use in industries that demand robust, secure, and long-lasting connections in high-pressure pipelines. You’ll often see them in oil and gas transmission lines, refinery systems, petrochemical plants, power generation units, and high-temperature process equipment. These flanges are also perfect for heavy-duty applications in water treatment facilities, marine engineering, and industrial manufacturing. Their welded neck design ensures excellent alignment and stability, making them a go-to choice for professionals looking for dependable solutions in demanding environments.
| Conditional passage Dy | (b) | (d1) | (Dn) | (Dm) | Mass, kg | ||||
| connecting projection (C) | protrusion (C) | hollow (C) | thorn (C) | groove (C) | |||||
| 10 | 10 | 8 | 15 | 22 | 0,34 | 0,34 | 0,32 | 0,34 | 0,33 |
| 15 | 12 | 19 | 28 | 0,40 | 0,40 | 0,38 | 0,40 | 0,40 | |
| 20 | 18 | 26 | 36 | 0,53 | 0,53 | 0,50 | 0,53 | 0,52 | |
| 25 | 12 | 25 | 33 | 42 | 0,76 | 0,77 | 0,72 | 0,75 | 0,75 |
| 32 | 31 | 39 | 50 | 1,10 | 1,08 | 1,04 | 1,08 | 1,08 | |
| 40 | 38 | 46 | 60 | 1,36 | 1,37 | 1,28 | 1,30 | 1,34 | |
| 50 | 49 | 58 | 70 | 1,53 | 1,51 | 1,44 | 1,46 | 1,47 | |
| 65 | 66 | 77 | 88 | 1,97 | 2,06 | 1,83 | 1,72 | 1,75 | |
| 80 | 13 | 78 | 90 | 102 | 2,76 | 2,76 | 2,80 | 2,65 | 2,72 |
| 100 | 96 | 110 | 122 | 3,35 | 3,04 | 3,03 | 3,03 | 3,04 | |
| 125 | 15 | 121 | 135 | 148 | 4,66 | 4,24 | 3,66 | 4,50 | 4,55 |
| 150 | 146 | 161 | 172 | 5,37 | 5,85 | 4,93 | 5,29 | 5,35 | |
| (175) | 17 | 177 | 196 | 210 | 7,32 | 8,10 | 6,92 | 7,11 | 7,16 |
| 200 | 202 | 222 | 235 | 8,37 | 9,35 | 7,75 | 7,98 | 8,05 | |
| (225) | 226 | 248 | 260 | 9,45 | 9,25 | 8,72 | 8,98 | 9,06 | |
| 250 | 18 | 254 | 278 | 288 | 10,99 | 10,69 | 10,14 | 12,20 | 12,30 |
| 300 | 303 | 330 | 340 | 14,82 | 14,28 | 14,10 | 13,81 | 14,11 | |
| 350 | 351 | 382 | 390 | 17,69 | 18,65 | 17,64 | 16,35 | 16,72 | |
| 400 | 398 | 432 | 440 | 20,55 | 19,69 | 19,30 | 18,83 | 19,31 | |
| (450) | 450 | 484 | 494 | 23,63 | 23,60 | 21,90 | 21,62 | 22,24 | |
| 500 | 19 | 501 | 535 | 545 | 26,63 | 29,10 | 25,90 | 24,44 | 25,10 |
| 600 | 602 | 636 | 650 | 35,79 | 35,60 | 33,40 | 37,49 | 33,67 | |
| (700) | 692 | 726 | 740 | 44,31 | 44,10 | 41,10 | 40,60 | 41,86 | |
| 800 | 792 | 826 | 844 | 56,17 | 55,20 | 52,20 | 51,67 | 53,36 | |
| (900) | 21 | 892 | 926 | 944 | 66,79 | – | – | – | – |
| 1000 | 992 | 1028 | 1044 | 73,51 | |||||
| 1200 | 23 | 1192 | 1228 | 1248 | 111,43 | ||||
| 1400 | 27 | 1392 | 1428 | 1456 | 156,58 | ||||
| 1600 | 32 | 1592 | 1628 | 1660 | 218,57 | ||||
Yes, we offer custom sizes for GOST 12821-80 Flanges to meet specific project needs. Our team at Khawla Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@khawlaflanges.com
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.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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