In the industrial landscape of Safat, Kuwait, Shiraz Flanges has built a strong reputation as a dedicated manufacturer and supplier of high-quality pipeline components. We specialize in producing GOST 12821-80 flanges, a cornerstone of robust piping systems throughout the region. Our commitment lies in delivering precision-engineered flanges that adhere strictly to this demanding standard, ensuring reliability and safety for our clients. We pride ourselves on offering not just products, but dependable solutions backed by local expertise and a focus on meeting the specific needs of Kuwait’s diverse industries.
The GOST 12821-80 standard specifies a demanding set of requirements for these steel flanges. In terms of composition, common grades include carbon steels like St3sp and 20, as well as alloy steels such as 09G2S, chosen for their strength and durability. The mechanical properties are rigorously tested to guarantee performance under pressure, with specific yield and tensile strength values that ensure the flange can handle the intended loads without failure. This careful balance of material science and engineering creates a component known for its resilience in challenging environments.
| 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 |
Shiraz Flanges a leading supplier in Safat, Kuwait, 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.
The GOST 12821-80 flange is widely used in high-pressure pipelines, industrial machinery and equipment in various industries. Commonly used in the oil, gas, petrochemical and electrical industries these flanges provide safe and reliable connections .To liquid and steam pipelines under extreme conditions their design make sure it is a watertight joint, and allows for temperature adjustment. compressors valves and other important applications. In addition it makes it easier to connect and disconnect pipelines, simplifying maintenance and inspection. Renowned for compatibility with high pressure and high temperature environments GOST 12821-80 flanges help enhance the safety efficiency and functionality of the system
| 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 Shiraz Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@shirazflanges.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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