What are Korean Flanges?
Korean flanges, also known as KS flanges, are a type of piping system flange used in Korean standards. They are designed to connect pipes, valves and other equipment in piping systems and are available in a variety of sizes and pressure ratings. Korean standard flanges are typically made of carbon steel, stainless steel or other high quality materials and are used in a variety of applications including oil and gas, petrochemical, power generation and water treatment. Korean Standard Flanges are similar to other types of flanges, such as ANSI flanges, but are designed to meet the specific requirements of Korean piping systems.
Advantages and disadvantage of Korean Flanges
There are several advantages and disadvantages of using Korean flanges, as listed below: Advantages of Korean standard flanges:
One of the main advantages of Korean standard flanges is their versatility. They are available in a wide range of sizes and pressure ratings for a variety of applications. Whether you need a flange for high pressure piping, low pressure piping systems, or anything in between, you can find the perfect solution with Korean Standard Flanges. In addition to their versatility, Korean Standard flanges are known for their durability and long-lasting performance. They are resistant to corrosion, wear and other types of damage, making them a smart choice for industries that need high-quality flanges that can withstand harsh environments. So, why choose Korean Standard Flanges for your next project? Here are a few key reasons.
- Cost-effective: Korean Standard Flanges are competitively priced, making them a budget-friendly choice for manufacturers and industries of all sizes.
- High quality: These flanges are manufactured using advanced manufacturing techniques and top-quality materials, ensuring they meet the highest quality and performance standards.
- Versatility: Korean standard flanges are available in a wide range of sizes and pressure ratings for a variety of applications.
- Durable: Korean Standard Flanges are resistant to corrosion, wear and other types of damage, making them a long-lasting solution to your flange needs.
Overall, Korean Standard Flanges are a reliable and cost effective choice for your flanging needs. Whether you need a flange for high pressure piping, low pressure piping systems, or anything in between, these flanges will meet your needs and exceed your expectations.
Disadvantages of Korean Standard Flanges:
Korean flanges may not be compatible with certain types of piping systems or equipment. When selecting a flange type, the specific requirements of the piping system must be carefully considered. Korean flanges may be a suitable choice for some applications, but may not be the best choice for others.
What are the different types of Korean flanges?
Korean standard flanges are an essential component in various industries such as the oil and gas, petrochemical, and construction sectors. They are used to connect pipes, valves, and other equipment and come in a variety of shapes and sizes to suit different applications. There are several types of Korean standard flanges, each with its unique features and advantages. Here is a brief overview of the different types of Korean standard flanges:
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| Socket Welding Flange | Lap Joint Flange | Blind Flange |
| Socket Welding flanges have counter bore is slightly larger than the Outer Diameter of the matching pipe, allowing the pipe to be inserted. A restriction is built into the bottom of the bore, which acts as a shoulder for the pipe to rest on, and has the same ID of matching pipe. | A Lap Joint Flange is usually used in conjunction with Lap Joint Stubs. Lap Joint Flanges in carbon or low alloy steel piping systems are best used when frequent dismantling for inspection and cleaning is required. The use of Lap Joint Flanges at points where severe bending stress occurs should be avoided. | A Blind Flange has no bore, and is used to close ends of piping systems. A blind flange also permits easy access to a line ones it has been sealed. The blind flange is sometimes machined to accept a pipe of the nominal Size to which reduction is being made. The reduction can be either threaded or welded. |
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| Welding Neck Flange | Threaded (Screwed) Flange | Slip-On Flange |
| Weld neck pipe flanges attach to the pipe by welding the pipe to the neck of the pipe flange. This allows for the transfer of stress from the weld neck pipe flanges to the pipe itself. This also reduces high stress concentration at the base of the hub of the weld neck pipe flanges. Weld neck pipe flanges are often used for high pressure applications. | Screwed or Threaded flanges are attached to the pipe like any other screwed fittings, and may be back-welded to seal the joint between pipe and flange. Although still available in most sizes and pressure ratings, screwed fittings today are used almost exclusively in smaller pipe sizes and at low pressures. | Slip on pipe flanges actually slip over the pipe. These pipe flanges are typically machined with an inside diameter slightly larger than the outside diameter of the pipe. Slip on pipe flanges are secured to the pipe with a fillet weld at the top and the bottom of the slip on pipe flanges. |
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| Compact Flange | Spectacle Blind Flange | Orifice Flange |
| A compact flange, similar to a swivel ring flange, is a two-piece constructed flange used extensively for offshore pipelines, offshore industry applications and onshore and sub-sea applications. Its double sealing action prevents hydrocarbon releases to address health and safety issues and concerns. | A spectacle blind is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device. | An Orifice Flange is intended for use instead of standard pipe Flanges when an orifice plate or flow nozzle must be installed. Pairs of pressure tapings are machined into the Orifice Flange, making separate orifice carriers or tapings in the pipe wall unnecessary. |
Korean standard flanges are an essential component in various industries and come in a variety of shapes and sizes to suit different applications. Whether you need a slip-on flange for a low-pressure application or a weld neck flange for a high-pressure application, there is a Korean standard flange to suit your needs.
Material of Korean Flanges
Korean flanges are typically made of carbon steel, although they can also be made of stainless steel or other materials. Carbon steel flanges are strong and durable, and they are commonly used in a variety of industrial and mechanical applications. Stainless steel flanges are resistant to corrosion and are often used in applications where hygiene is a concern, such as in the food and pharmaceutical industries. Other materials that may be used to make Korean flanges include brass, bronze, and aluminum. It is important to select the appropriate material for a flange based on the specific requirements of the application in which it will be used.
| Carbon Steel | ASTM A105 |
| ASME SA105 | |
| DIN 1.0402 | |
| DIN 1.0460 | |
| DIN 1.0619 | |
| ASTM A105N | |
| ASME SA105N | |
| ASTM A350 LF2 | |
| ASME SA350 | |
| High Yield CS ASTM A694 | |
| Stainless Steel | ASTM A182 F304 |
| ASTM A182 F304L | |
| ASTM A182 F316 | |
| ASTM A182 F316L | |
| ASTM A182 F317 | |
| ASTM A182 F317L | |
| ASTM A182 F321 | |
| ASTM A182 F321H | |
| ASTM A182 F347 | |
| ASTM A182 F347H | |
| Alloy Steel | ASTM A182 F5 |
| ASTM A182 F9 | |
| ASTM A182 F11 | |
| ASTM A182 F22 | |
| ASTM A182 F91 | |
| Inconel | Inconel 600 |
| Inconel 601 | |
| Inconel 625 | |
| Inconel 718 | |
| Inconel x750 | |
| Copper | T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc |
| Copper Nickel | Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640 |
| Brass | 3602 / 2604 / H59 / H62 / etc. |
| Hastelloy | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X |
| Monel | Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500) |
| Alloy 20 | Carpenter 20 Alloy, Alloy 20Cb-3 |
| Aluminium | 5052 /6061/ 6063 / 2017 / 7075 / etc. |
| Nickel | Nickel 200, Nickel 201 |
| Duplex | S31803 / S32205 A182 Gr F51 |
| Super Duplex | S32750 / S32760 A182 Gr F53 / F55 / F60 |
| Incoloy | Incoloy 800, Incoloy 800H, Incoloy 800HT (UNS N08800), Incoloy 825 (UNS N08825) |
| 254 Smo | SMO 254/6Mo, UNS S31254, DIN 1.4547 |
| Nimonic | Nimonic 75, Nimonic 80A, Nimonic 90 |
| Other material | Tin bronze, Alumunum bronze, Lead bronze |
| Titanium | ASTM B381 Titanium Gr. 1 |
| ASTM B381 Titanium Gr. 2 | |
| ASTM B381 Titanium Gr. 4 | |
| ASTM B381 Titanium Gr. 5 | |
| ASTM B381 Titanium Gr. 7 |
Size of Korean Flanges
There are different sizes of KS flanges available depending on the specific application. Some common sizes include:
- 150mm (6 inches)
- 200mm (8 inches)
- 250mm (10 inches)
- 300mm (12 inches)
- 350mm (14 inches)
- 400mm (16 inches)
- 450mm (18 inches)
- 500mm (20 inches)
- 600mm (24 inches)
Please note that these sizes are for reference only and may vary depending on the manufacturer and specific standard being used. It is important to consult with a manufacturer or engineer to determine the appropriate size for your specific application.
Dimensions of KS Flanges
The exact dimensions of KS flanges depend on the size, type and pressure rating of the flange. some of the dimensions that may be specified for KS flanges include flange outside diameter, bolt hole diameter, flange thickness and the distance between the flange and the pipe. It is important to select the proper flange size and type for your piping system, as using the wrong flange type or size may result in leaks or other problems. You should consult a Korean industry standard or piping system specialist to determine the proper size of flanges in your system.
Dimensions of KS B1503 5K Flange Standard
PN- 5K Dimensions in mm.
| Nominal Dia. of Flange | Outside Dia. of Flange D | Sectional Dimensions of flange | Nominal Bolt Size | Welding | ||||||||||||
| Dia. of Bolt Circle C | Dia. Of raised Face g | Inside Dia. Of Flange do | Outside Dia. Of Applicable pipe | t | T | Dia. of Hub | Radius r | Raised Face f | Hole Dia. H | Number of Bolt Holes | ||||||
| a | b | W1 | W2 | |||||||||||||
| 10 | 75 | 55 | 39 | 17.8 | 17.3 | 9 | – | – | – | – | 1 | 12 | 4 | M10 | 5 | 2.5 |
| 15 | 80 | 60 | 44 | 22.2 | 21.7 | 9 | – | – | – | – | 1 | 12 | 4 | M10 | 5 | 3 |
| 20 | 85 | 65 | 49 | 27.7 | 27.2 | 10 | – | – | – | – | 1 | 12 | 4 | M10 | 5 | 3 |
| 25 | 95 | 75 | 59 | 34.5 | 34 | 10 | – | – | – | – | 1 | 12 | 4 | M10 | 5 | 3 |
| 32 | 115 | 90 | 70 | 43.2 | 42.7 | 12 | – | – | – | – | 2 | 15 | 4 | M12 | 6 | 3 |
| 40 | 120 | 95 | 75 | 49.1 | 48.6 | 12 | – | – | – | – | 2 | 15 | 4 | M12 | 6 | 3 |
| 50 | 130 | 105 | 85 | 61.1 | 60.5 | 14 | – | – | – | – | 2 | 15 | 4 | M12 | 6 | 3 |
| 65 | 155 | 130 | 110 | 77.1 | 76.3 | 14 | – | – | – | – | 2 | 15 | 4 | M12 | 6 | 4 |
| 80 | 180 | 145 | 121 | 90 | 89.1 | 14 | – | – | – | – | 2 | 19 | 4 | M16 | 6 | 4 |
| 90 | 190 | 155 | 131 | 102.6 | 101.6 | 14 | – | – | – | – | 2 | 19 | 4 | M16 | 6 | 4 |
| 100 | 200 | 165 | 141 | 115.4 | 114.3 | 16 | – | – | – | – | 2 | 19 | 8 | M16 | 7 | 4 |
| 125 | 235 | 200 | 176 | 141.2 | 139.8 | 16 | – | – | – | – | 2 | 19 | 8 | M16 | 7 | 4 |
| 150 | 265 | 230 | 206 | 166.6 | 165.2 | 18 | – | – | – | – | 2 | 19 | 8 | M16 | 7 | 5 |
| 175 | 300 | 260 | 232 | 192.1 | 190.7 | 18 | – | – | – | – | 2 | 23 | 8 | M20 | 7.5 | 5 |
| 200 | 320 | 280 | 252 | 218 | 216.3 | 20 | – | – | – | – | 2 | 23 | 8 | M20 | 8.5 | 6 |
| 225 | 345 | 305 | 277 | 243.7 | 241.8 | 20 | – | – | – | – | 2 | 23 | 12 | M20 | 9 | 6 |
| 250 | 385 | 345 | 317 | 269.5 | 267.4 | 22 | – | – | – | – | 2 | 23 | 12 | M20 | 10 | 6 |
| 300 | 430 | 390 | 360 | 321 | 318.5 | 22 | – | – | – | – | 3 | 23 | 12 | M20 | 10 | 6 |
| 350 | 480 | 435 | 403 | 358.1 | 355.6 | 24 | – | – | – | – | 3 | 25 | 12 | M22 | 12 | 7 |
| 400 | 540 | 495 | 463 | 409 | 406.4 | 24 | – | – | – | – | 3 | 25 | 16 | M22 | 12 | 7 |
| 450 | 605 | 555 | 523 | 460 | 457.2 | 24 | 40 | 495 | 500 | 5 | 3 | 25 | 16 | M22 | 12 | 7 |
| 500 | 655 | 605 | 573 | 511 | 508 | 24 | 40 | 546 | 552 | 5 | 3 | 25 | 20 | M22 | 12 | 7 |
| 550 | 720 | 665 | 630 | 562 | 558.8 | 26 | 42 | 597 | 603 | 5 | 3 | 27 | 20 | M24 | 12 | 7 |
| 600 | 770 | 715 | 680 | 613 | 609.6 | 26 | 44 | 648 | 654 | 5 | 3 | 27 | 20 | M24 | 12 | 7 |
| 650 | 825 | 770 | 735 | 664 | 660.4 | 26 | 48 | 702 | 708 | 5 | 3 | 27 | 24 | M24 | 12 | 7 |
| 700 | 875 | 820 | 785 | 715 | 711.2 | 26 | 48 | 751 | 758 | 5 | 3 | 27 | 24 | M24 | 12 | 7 |
| 750 | 945 | 880 | 840 | 766 | 762 | 28 | 52 | 802 | 810 | 5 | 3 | 33 | 24 | M30 | 12 | 7 |
| 800 | 995 | 930 | 890 | 817 | 812.8 | 28 | 52 | 854 | 862 | 5 | 3 | 33 | 24 | M30 | 13 | 8 |
| 850 | 1045 | 980 | 940 | 868 | 863.6 | 28 | 54 | 904 | 912 | 5 | 3 | 33 | 24 | M30 | 13 | 8 |
| 900 | 1095 | 1030 | 990 | 919 | 914.4 | 30 | 56 | 956 | 964 | 5 | 3 | 33 | 24 | M30 | 13 | 8 |
| 1000 | 1195 | 1130 | 1090 | 1021 | 1016 | 32 | 60 | 1058 | 1066 | 5 | 3 | 33 | 28 | M30 | 14 | 9 |
| *(1100) | 1305 | 1240 | 1200 | 1123 | 1117.6 | 32 | – | – | – | – | 3 | 33 | 28 | M30 | ||
| *1200 | 1420 | 1350 | 1305 | 1225 | 1219.2 | 34 | – | – | – | – | 3 | 33 | 32 | M30 | ||
| *1350 | 1575 | 1505 | 1460 | – | 1371.6 | 34 | – | – | – | – | 3 | 33 | 32 | M30 | ||
| *1500 | 1730 | 1660 | 1615 | – | 1524 | 36 | – | – | – | – | 3 | 33 | 36 | |||
Dimensions of KS B1503 10K Flange Standard
PN 10K Dimensions in mm.
| Nominal Dia. of Flange | Outside Dia. of Flange D | Sectional Dimensions of flange | Nominal Bolt Size | Welding | ||||||||||||
| Dia. of Bolt Circle C | Dia. Of raised Face g | Inside Dia. Of Flange do | Outside Dia. Of Applicable pipe | t | T | Dia. of Hub | Radius r | Raised Face f | Hole Dia. H | Number of Bolt Holes | ||||||
| a | b | W1 | W2 | |||||||||||||
| 10 | 90 | 65 | 46 | 17.8 | 17.3 | 12 | – | – | – | – | 1 | 15 | 4 | M12 | 5 | 2.5 |
| 15 | 95 | 70 | 51 | 22.2 | 21.7 | 12 | – | – | – | – | 1 | 15 | 4 | M12 | 5 | 3 |
| 20 | 100 | 75 | 56 | 27.7 | 27.2 | 14 | – | – | – | – | 1 | 15 | 4 | M12 | 5 | 3 |
| 25 | 125 | 90 | 67 | 34.5 | 34 | 14 | – | – | – | – | 1 | 19 | 4 | M16 | 5 | 3 |
| 32 | 135 | 100 | 76 | 43.2 | 42.7 | 16 | – | – | – | – | 2 | 19 | 4 | M16 | 6 | 3 |
| 40 | 140 | 105 | 81 | 49.1 | 48.6 | 16 | – | – | – | – | 2 | 19 | 4 | M16 | 6 | 3 |
| 50 | 155 | 120 | 96 | 61.1 | 60.5 | 16 | – | – | – | – | 2 | 19 | 4 | M16 | 6 | 3 |
| 65 | 175 | 140 | 116 | 77.1 | 76.3 | 18 | – | – | – | – | 2 | 19 | 4 | M16 | 6.5 | 4 |
| 80 | 185 | 150 | 126 | 90 | 89.1 | 18 | – | – | – | – | 2 | 19 | 8 | M16 | 6.5 | 4 |
| -90 | 195 | 160 | 136 | 102.6 | 101.6 | 18 | – | – | – | – | 2 | 19 | 8 | M16 | 6.5 | 4 |
| 100 | 210 | 175 | 151 | 115.4 | 114.3 | 18 | – | – | – | – | 2 | 19 | 8 | M16 | 7 | 4 |
| 125 | 250 | 210 | 182 | 141.2 | 139.8 | 20 | – | – | – | – | 2 | 23 | 8 | M20 | 7.5 | 4 |
| 150 | 280 | 240 | 212 | 166.6 | 165.2 | 22 | – | – | – | – | 2 | 23 | 8 | M20 | 8 | 5 |
| -175 | 305 | 265 | 237 | 192.1 | 190.7 | 22 | – | – | – | – | 2 | 23 | 12 | M20 | 9 | 5 |
| 200 | 330 | 290 | 262 | 218 | 216.3 | 22 | – | – | – | – | 2 | 23 | 12 | M20 | 9 | 6 |
| -255 | 350 | 310 | 282 | 243.7 | 241.8 | 22 | – | – | – | – | 2 | 23 | 12 | M20 | 9 | 6 |
| 250 | 400 | 355 | 324 | 269.5 | 267.4 | 24 | 36 | 288 | 292 | 6 | 2 | 25 | 12 | M22 | 10 | 6 |
| 300 | 445 | 400 | 368 | 321 | 318.5 | 24 | 38 | 340 | 346 | 6 | 3 | 25 | 16 | M22 | 10 | 6 |
| 350 | 490 | 445 | 413 | 358.1 | 355.6 | 26 | 42 | 380 | 386 | 6 | 3 | 25 | 16 | M22 | 12 | 7 |
| 400 | 560 | 510 | 475 | 409 | 406.4 | 28 | 44 | 436 | 442 | 6 | 3 | 27 | 16 | M24 | 12 | 7 |
| 450 | 620 | 565 | 530 | 460 | 457.2 | 30 | 48 | 496 | 502 | 6 | 3 | 27 | 20 | M24 | 14 | 8 |
| 500 | 675 | 620 | 585 | 511 | 508 | 30 | 48 | 548 | 554 | 6 | 3 | 27 | 20 | M24 | 14 | 8 |
| 550 | 745 | 680 | 640 | 562 | 558.8 | 32 | 52 | 604 | 610 | 6 | 3 | 33 | 20 | M30 | 15 | 9 |
| 600 | 795 | 730 | 690 | 613 | 609.6 | 32 | 52 | 656 | 662 | 6 | 3 | 33 | 24 | M30 | 16 | 10 |
| 650 | 845 | 780 | 740 | 664 | 660.4 | 34 | 56 | 706 | 712 | 6 | 3 | 33 | 24 | M30 | 16 | 10 |
| 700 | 905 | 840 | 800 | 715 | 711.2 | 34 | 58 | 762 | 770 | 6 | 3 | 33 | 24 | M30 | 17 | 10 |
| 750 | 970 | 900 | 855 | 766 | 762 | 36 | 62 | 816 | 824 | 6 | 3 | 33 | 24 | M30 | 18 | 11 |
| 800 | 1020 | 950 | 905 | 817 | 812.8 | 36 | 64 | 868 | 876 | 6 | 3 | 33 | 28 | M30 | 19 | 12 |
| -850 | 1070 | 1000 | 955 | 868 | 863.6 | 36 | 66 | 920 | 928 | 6 | 3 | 33 | 28 | M30 | 19 | 12 |
| 900 | 1120 | 1050 | 1005 | 919 | 914.4 | 38 | 70 | 971 | 979 | 6 | 3 | 33 | 28 | M30 | 22 | 14 |
| 1000 | 1235 | 1160 | 1110 | 1021 | 1016 | 40 | 74 | 1073 | 1081 | 6 | 3 | 39 | 28 | M36 | 22 | 14 |
| *(1100) | 1345 | 1270 | 1220 | 1123 | 1117.6 | 42 | – | – | – | – | 3 | 39 | 28 | M36 | ||
| *1200 | 1465 | 1380 | 1325 | 1225 | 1219.2 | 44 | – | – | – | – | 3 | 39 | 32 | M36 | ||
| *1350 | 1630 | 1540 | 1480 | – | 1371.6 | 48 | – | – | – | – | 3 | 45 | 36 | M42 | ||
| *1500 | 1795 | 1700 | 1635 | – | 1524 | 50 | – | – | – | – | 3 | 45 | 40 | M42 | ||
Dimensions of KS B1503 16K Flange Standard
PN 16K. Dimensions in mm.
| Nominal Dia. of Flange | Outside Dia. of Flange D | Sectional Dimensions of flange | Nominal Bolt Size | |||||||||||
| Dia. of Bolt Circle C | Dia. Of raised Face g | Inside Dia. Of Flange do | Outside Dia. Of Applicable pipe | t | T | Dia. of Hub | Radius r | Raised Face f | Hole Dia. H | Number of Bolt Holes | ||||
| a | b | |||||||||||||
| 10 | 90 | 65 | 46 | 17.8 | 17.3 | 12 | 16 | 26 | 28 | 4 | 1 | 15 | 4 | M12 |
| 15 | 95 | 70 | 51 | 22.2 | 21.7 | 12 | 16 | 30 | 32 | 4 | 1 | 15 | 4 | M12 |
| 20 | 100 | 75 | 56 | 27.7 | 27..2 | 14 | 20 | 38 | 42 | 4 | 1 | 15 | 4 | M12 |
| 25 | 125 | 90 | 67 | 34.5 | 34 | 14 | 20 | 46 | 50 | 4 | 1 | 19 | 4 | M16 |
| 32 | 135 | 100 | 76 | 43.2 | 42.7 | 16 | 22 | 56 | 60 | 5 | 2 | 19 | 4 | M16 |
| 40 | 140 | 105 | 81 | 49.1 | 48.6 | 16 | 24 | 62 | 66 | 5 | 2 | 19 | 4 | M16 |
| 50 | 155 | 120 | 96 | 61.1 | 60.5 | 16 | 24 | 76 | 80 | 5 | 2 | 19 | 8 | M16 |
| 65 | 175 | 140 | 116 | 77.1 | 76.3 | 18 | 26 | 94 | 98 | 5 | 2 | 19 | 8 | M16 |
| 80 | 200 | 160 | 132 | 90 | 89.1 | 20 | 28 | 108 | 112 | 6 | 2 | 23 | 8 | M20 |
| -90 | 210 | 170 | 145 | 102.6 | 101.6 | 20 | 30 | 120 | 124 | 6 | 2 | 23 | 8 | M20 |
| 100 | 225 | 185 | 160 | 115.4 | 114.3 | 22 | 34 | 134 | 138 | 6 | 2 | 23 | 8 | M20 |
| 125 | 270 | 225 | 195 | 141.2 | 139.8 | 22 | 34 | 164 | 170 | 6 | 2 | 25 | 8 | M22 |
| 150 | 305 | 260 | 230 | 166.6 | 165.2 | 24 | 38 | 196 | 202 | 6 | 2 | 25 | 12 | M22 |
| 200 | 350 | 305 | 275 | 218 | 216.3 | 26 | 40 | 244 | 252 | 6 | 2 | 25 | 12 | M22 |
| 250 | 430 | 380 | 345 | 269.5 | 267.4 | 28 | 44 | 304 | 312 | 6 | 2 | 27 | 12 | M24 |
| 300 | 480 | 430 | 395 | 321 | 318.5 | 30 | 48 | 354 | 364 | 8 | 3 | 27 | 16 | M24 |
| 350 | 540 | 480 | 440 | 358.1 | 355.6 | 34 | 52 | 398 | 408 | 8 | 3 | 33 | 16 | M30X3 |
| 400 | 605 | 540 | 495 | 409 | 406.4 | 38 | 60 | 446 | 456 | 10 | 3 | 33 | 16 | M30X3 |
| 450 | 675 | 605 | 560 | 460 | 457.2 | 40 | 64 | 504 | 514 | 10 | 3 | 33 | 20 | M30X3 |
| 500 | 730 | 660 | 615 | 511 | 508 | 42 | 68 | 558 | 568 | 10 | 3 | 33 | 20 | M30X3 |
| -550 | 795 | 720 | 670 | 562 | 558.8 | 44 | 70 | 612 | 622 | 10 | 3 | 39 | 20 | M36X3 |
| 600 | 845 | 770 | 720 | 613 | 609.6 | 46 | 74 | 666 | 676 | 10 | 3 | 39 | 24 | M36X3 |
| -650 | 895 | 820 | 770 | 664 | 660.4 | 48 | 77 | 704 | 726 | 10 | 5 | 39 | 24 | M36X3 |
| 700 | 960 | 875 | 820 | 715 | 711.2 | 50 | 80 | 754 | 776 | 10 | 5 | 42 | 24 | M39X3 |
| -750 | 1020 | 935 | 880 | 766 | 762 | 52 | 83 | 806 | 832 | 10 | 5 | 42 | 24 | M39X3 |
| 800 | 1085 | 990 | 930 | 817 | 812.8 | 54 | 86 | 865 | 885 | 10 | 5 | 48 | 24 | M45X3 |
| -850 | 1135 | 1040 | 980 | 868 | 863.6 | 56 | 89 | 916 | 936 | 10 | 5 | 48 | 24 | M45X3 |
| 900 | 1185 | 1090 | 1030 | 919 | 914.4 | 58 | 93 | 968 | 986 | 10 | 5 | 48 | 28 | M45X3 |
| 1000 | 1320 | 1210 | 1140 | 1021 | 1016 | 62 | 99 | 1070 | 1098 | 12 | 5 | 56 | 28 | M52X3 |
| -1100 | 1420 | 1310 | 1240 | 1123 | 1117.6 | 66 | 105 | 1180 | 1200 | 12 | 5 | 56 | 32 | M52X3 |
| 1200 | 1530 | 1420 | 1350 | 1225 | 1219.2 | 70 | 112 | 1282 | 1302 | 12 | 5 | 56 | 32 | M52X3 |
Dimensions of KS B1503 20K Flange Standard
PN 20K Dimensions in mm.
| Nominal Dia. of Flange | Outside Dia. of Flange D | Sectional Dimensions of flange | Reference | |||||||||||||||||
| Dia. of Bolt Circle C | Dia. Of raised Face g | Inside Dia. Of Flange do | Outside Dia. of Steel pipe | t | T | Dia. of Hub | Radius r | f | D | Number of Bolt Holes | Holes Dia. H | Nominal Bolt SIZE | S1 | M | S2 | N | L | |||
| a | b | |||||||||||||||||||
| 10 | 90 | 65 | 46 | 17.8 | 17.3 | 14 | 20 | 30 | 32 | 4 | 1 | – | 4 | 15 | M12 | 27 | 4 | 27 | 4 | – |
| 15 | 95 | 70 | 51 | 22.2 | 21.7 | 14 | 20 | 34 | 36 | 4 | 1 | – | 4 | 15 | M12 | 31 | 4 | 31 | 4 | – |
| 20 | 100 | 75 | 56 | 27.7 | 27.2 | 16 | 22 | 40 | 42 | 4 | 1 | – | 4 | 15 | M12 | 37 | 4 | 37 | 4 | – |
| 25 | 125 | 90 | 67 | 34.5 | 34 | 16 | 24 | 48 | 50 | 4 | 1 | 4 | 19 | M16 | 44 | 4 | 44 | 4.5 | – | |
| 32 | 135 | 100 | 76 | 43.2 | 42.7 | 18 | 26 | 56 | 60 | 5 | 2 | – | 4 | 19 | M16 | 52 | 4 | 53 | 5 | – |
| 40 | 140 | 105 | 81 | 49.1 | 48.6 | 18 | 26 | 62 | 66 | 5 | 2 | – | 4 | 19 | M16 | 58 | 4 | 59 | 5.5 | – |
| 50 | 155 | 120 | 96 | 61.1 | 60.5 | 18 | 26 | 76 | 80 | 5 | 2 | – | 8 | 19 | M16 | 70 | 4 | 72 | 5.5 | – |
| 65 | 175 | 140 | 116 | 77.7 | 76.3 | 20 | 30 | 100 | 104 | 5 | 2 | 65.9 | 8 | 19 | M16 | 94 | 6 | – | – | 6 |
| 80 | 200 | 160 | 132 | 90 | 89.1 | 22 | 34 | 113 | 117 | 6 | 2 | 78.1 | 8 | 23 | M20 | 107 | 6 | – | – | 6 |
| -90 | 210 | 170 | 145 | 102.6 | 101.6 | 24 | 36 | 126 | 130 | 6 | 2 | 90.2 | 8 | 23 | M20 | 120 | 6 | – | – | 6 |
| 100 | 225 | 185 | 160 | 115.4 | 114.3 | 24 | 36 | 138 | 142 | 6 | 2 | 102.3 | 8 | 23 | M20 | 132 | 6 | – | – | 6 |
| 125 | 270 | 225 | 195 | 141.2 | 139.8 | 26 | 40 | 166 | 172 | 6 | 2 | 126.6 | 8 | 25 | M22 | 160 | 7 | – | – | 6 |
| 150 | 305 | 260 | 230 | 166.6 | 165.2 | 28 | 42 | 196 | 202 | 6 | 2 | 151 | 12 | 25 | M22 | 186 | 8 | – | – | 6 |
| 200 | 350 | 305 | 275 | 218 | 216.3 | 30 | 46 | 244 | 252 | 6 | 2 | 199.9 | 12 | 25 | M22 | 237 | 9 | – | – | 6 |
| 250 | 430 | 380 | 345 | 269.5 | 267.4 | 34 | 52 | 304 | 312 | 6 | 2 | 248.8 | 12 | 27 | M24 | 290 | 10 | – | – | 6 |
| 300 | 480 | 430 | 395 | 321 | 318.5 | 36 | 56 | 354 | 364 | 8 | 3 | 297.9 | 16 | 27 | M24 | 345 | 11 | – | – | 6 |
| 350 | 540 | 480 | 440 | 358.1 | 355.6 | 40 | 62 | 398 | 408 | 8 | 3 | 333.4 | 16 | 33 | M30X3 | 384 | 12 | – | – | 6 |
| 400 | 605 | 540 | 495 | 409 | 406.4 | 46 | 70 | 446 | 456 | 10 | 3 | 381 | 16 | 33 | M30X3 | 437 | 13 | – | – | 7 |
| 450 | 675 | 605 | 560 | 460 | 457.2 | 48 | 78 | 504 | 514 | 10 | 3 | 431.8 | 20 | 33 | M30X3 | 490 | 15 | – | – | 7 |
| 500 | 730 | 660 | 615 | 511 | 508 | 50 | 84 | 558 | 568 | 10 | 3 | 482.6 | 20 | 33 | M30X3 | 544 | 16 | – | – | 7 |
| -550 | 795 | 720 | 670 | 562 | 558.8 | 52 | 90 | 612 | 622 | 10 | 3 | 533.4 | 20 | 39 | M36X3 | 595 | 16 | – | – | 7 |
| 600 | 845 | 770 | 720 | 613 | 609.6 | 54 | 96 | 666 | 676 | 10 | 3 | 584.2 | 24 | 39 | M36X3 | 646 | 18 | – | – | 7 |
| *650 | 945 | 850 | 790 | 664 | 660.4 | 60 | 5 | 24 | 48 | M45X3 | ||||||||||
| *700 | 995 | 900 | 840 | 715 | 711.2 | 64 | 5 | 24 | 48 | M45X3 | ||||||||||
| *750 | 1080 | 970 | 900 | 766 | 762 | 68 | 5 | 24 | 56 | M52X3 | ||||||||||
| *800 | 1140 | 1030 | 960 | 817 | 812.8 | 72 | 5 | 24 | 56 | M52X3 | ||||||||||
| *850 | 1200 | 1090 | 1020 | 868 | 863.6 | 74 | 5 | 24 | 56 | M52X3 | ||||||||||
| *900 | 1250 | 1140 | 1070 | 919 | 914.4 | 76 | 5 | 28 | 56 | M52X3 | ||||||||||
Dimensions of KS B1503 30K Slip On Flange Standard
PN 30K SLIP ON FLANGE. Dimensions in mm.
| Nominal Dia. of Flange | Outside Dia. of Flange D | Sectional Dimensions of flange | Reference | |||||||||||||||||
| Dia. of Bolt Circle C | Dia. Of raised Face g | Inside Dia. Of Flange do | Outside Dia. of Steel pipe | t | T | Dia. of Hub | Radius r | f | D | Number of Bolt Holes | Holes Dia. H | Nominal Bolt SIZE | S1 | M | S2 | N | L | |||
| a | b | |||||||||||||||||||
| 10 | 110 | 75 | 52 | 17.8 | 17.3 | 16 | 24 | 30 | 34 | 4 | 1 | – | 4 | 19 | M16 | – | – | – | – | – |
| 15 | 115 | 80 | 55 | 22.2 | 21.7 | 18 | 26 | 36 | 40 | 5 | 1 | – | 4 | 19 | M16 | 31 | 4 | 40 | 5 | – |
| 20 | 120 | 85 | 60 | 27.7 | 27.2 | 18 | 28 | 42 | 46 | 5 | 1 | – | 4 | 19 | M16 | 37 | 5 | 44 | 5 | – |
| 25 | 130 | 95 | 70 | 34.5 | 34 | 20 | 30 | 50 | 54 | 5 | 1 | – | 4 | 19 | M16 | 55 | 6 | 52 | 5 | – |
| 32 | 140 | 105 | 80 | 43.2 | 42.7 | 22 | 32 | 60 | 64 | 6 | 2 | – | 4 | 19 | M16 | 52 | 6 | 60 | 5 | – |
| 40 | 160 | 120 | 90 | 49.1 | 48.6 | 22 | 34 | 66 | 70 | 6 | 2 | – | 4 | 23 | M20 | 58 | 6 | 66 | 5 | – |
| 50 | 165 | 130 | 105 | 61.1 | 60.5 | 22 | 36 | 82 | 86 | 6 | 2 | – | 8 | 19 | M16 | 70 | 6.5 | 78 | 5 | – |
| 65 | 200 | 160 | 130 | 77.1 | 76.3 | 26 | 40 | 102 | 106 | 8 | 2 | 65.9 | 8 | 23 | M20 | 96 | 9.5 | 94 | 5 | 6 |
| 80 | 210 | 170 | 140 | 90 | 89.1 | 28 | 44 | 115 | 21 | 8 | 2 | 78.1 | 8 | 23 | M20 | 109 | 9.5 | – | – | 6 |
| -90 | 230 | 185 | 150 | 102.6 | 101.6 | 30 | 46 | 128 | 134 | 8 | 2 | 90.2 | 8 | 25 | M22 | 122 | 9.5 | – | – | 6 |
| 100 | 240 | 195 | 160 | 115.4 | 114.3 | 32 | 48 | 141 | 147 | 8 | 2 | 102.3 | 8 | 25 | M22 | 135 | 9.5 | – | – | 6 |
| 125 | 275 | 230 | 195 | 141.2 | 139.8 | 36 | 54 | 166 | 172 | 8 | 2 | 126.6 | 8 | 25 | M22 | 160 | 9.5 | – | – | 6 |
| 150 | 325 | 275 | 235 | 166.6 | 165.2 | 38 | 58 | 196 | 204 | 8 | 2 | 151 | 12 | 27 | M24 | 186 | 9.5 | – | – | 6 |
| 200 | 370 | 320 | 280 | 218 | 216.3 | 42 | 64 | 248 | 256 | 8 | 2 | 199.9 | 12 | 27 | M24 | 237 | 9.5 | – | – | 6 |
| 250 | 450 | 390 | 345 | 269.5 | 267.4 | 48 | 72 | 306 | 314 | 10 | 2 | 248.8 | 12 | 22 | M30 | 290 | 10 | – | – | 6 |
| 300 | 515 | 450 | 405 | 321 | 318.5 | 52 | 78 | 360 | 370 | 10 | 3 | 297.9 | 16 | 33 | M30 | 345 | 12 | – | – | 6 |
| 350 | 560 | 495 | 450 | 358.1 | 355.6 | 54 | 84 | 402 | 412 | 12 | 3 | 333.4 | 16 | 33 | M30 | 383 | 13 | – | – | 6 |
| 400 | 630 | 560 | 510 | 409 | 406.4 | 60 | 92 | 456 | 468 | 15 | 3 | 381 | 16 | 39 | M36 | |||||
Dimensions of KS B1503 30K Weld Neck Flange Standard
PN 30K, WELD NECK FLANGE.
| Nominal Pipe Size | Outside Dia. of Flange D | Sectional Dimensions of Flange | Nominal Bolt Size | |||||||||||||
| Bolt Circle Dia. C | Dia. of Raised Face g | Outside Dia. of Steel Pipe | T | b | a | R | t | d | Radius r | s | f | Number of Bolt Holes | Dia. of Hole h | |||
| 15 | 115 | 80 | 55 | 21.7 | 45 | 40 | 22 | 20 | 18 | 15.8 | 6 | 3.1 | 1 | 4 | 19 | M16 |
| 20 | 120 | 85 | 60 | 27.2 | 45 | 44 | 27.5 | 20 | 18 | 21.1 | 6 | 3.2 | 1 | 4 | 19 | M16 |
| 25 | 130 | 95 | 70 | 34 | 48 | 52 | 34.4 | 20 | 20 | 26.8 | 6 | 3.8 | 1 | 4 | 19 | M16 |
| 32 | 140 | 105 | 80 | 42.7 | 52 | 62 | 43.1 | 30 | 22 | 35.1 | 6 | 4 | 2 | 4 | 19 | M16 |
| 40 | 160 | 120 | 90 | 48.6 | 54 | 70 | 49.1 | 30 | 22 | 40.7 | 6 | 4.2 | 2 | 4 | 23 | M20 |
| 50 | 165 | 130 | 105 | 60.5 | 57 | 84 | 61 | 30 | 22 | 52.2 | 8 | 4.4 | 2 | 8 | 19 | M16 |
| 65 | 200 | 160 | 130 | 76.3 | 69 | 105 | 76.9 | 30 | 26 | 65.3 | 8 | 5.8 | 2 | 8 | 23 | M20 |
| 80 | 210 | 170 | 140 | 89.1 | 73 | 118 | 89.7 | 30 | 28 | 76.4 | 8 | 6.1 | 2 | 8 | 23 | M20 |
| -90 | 230 | 185 | 150 | 101.6 | 74 | 130 | 102 | 30 | 30 | 89.5 | 8 | 6.4 | 2 | 8 | 25 | M22 |
| 100 | 240 | 195 | 160 | 114.3 | 76 | 142 | 115 | 30 | 32 | 101.5 | 8 | 6.8 | 2 | 8 | 25 | M22 |
| 125 | 275 | 230 | 195 | 139.8 | 86 | 172 | 141 | 50 | 36 | 125.7 | 10 | 7.5 | 2 | 8 | 25 | M22 |
| 150 | 325 | 275 | 235 | 165.2 | 95 | 202 | 166 | 50 | 38 | 150 | 10 | 8.1 | 2 | 12 | 27 | M24 |
| 200 | 370 | 320 | 280 | 216.3 | 102 | 254 | 218 | 50 | 42 | 198.7 | 10 | 9.4 | 2 | 12 | 27 | M24 |
| 250 | 450 | 390 | 345 | 267.4 | 118 | 312 | 269 | 50 | 48 | 247.5 | 12 | 10.6 | 2 | 12 | 33 | M30 3 |
| 300 | 515 | 450 | 405 | 318.5 | 127 | 366 | 320 | 50 | 52 | 296.4 | 15 | 11.8 | 3 | 16 | 33 | M30 3 |
| 350 | 560 | 495 | 450 | 355.6 | 134 | 406 | 357 | 80 | 54 | 331.8 | 15 | 12.7 | 3 | 16 | 33 | M30 3 |
| 400 | 630 | 560 | 510 | 406.4 | 149 | 462 | 408 | 80 | 60 | 379.1 | 20 | 14.6 | 3 | 16 | 39 | M36 3 |
Dimensions of KS B1503 Flange Facing – Flat Face And Raised Face
Flange Facing. Dimensions in mm.
| Nominal Dia. of Flange | Sectional Dimensions of Flange | Small Raised Facing | ||||||||||||
| 5K | 10K | 16K | 20K | 30K | 40K 63K | |||||||||
| g | f | g | f | g | f | g | f | g | f | g | f | g1 | f1 | |
| 10 | 39 | 1 | 46 | 1 | 46 | 1 | 46 | 1 | 52 | 1 | 52 | 1 | 35 | 1 |
| 15 | 44 | 1 | 51 | 1 | 51 | 1 | 51 | 1 | 55 | 1 | 55 | 1 | 42 | 1 |
| 20 | 49 | 1 | 56 | 1 | 56 | 1 | 56 | 1 | 60 | 1 | 60 | 1 | 50 | 1 |
| 25 | 59 | 1 | 67 | 1 | 67 | 1 | 67 | 1 | 70 | 1 | 70 | 1 | 60 | 1 |
| 32 | 70 | 2 | 76 | 2 | 76 | 2 | 76 | 2 | 80 | 2 | 80 | 2 | 68 | 2 |
| 40 | 75 | 2 | 81 | 2 | 81 | 2 | 81 | 2 | 90 | 2 | 80 | 2 | 75 | 2 |
| 50 | 85 | 2 | 96 | 2 | 96 | 2 | 96 | 2 | 105 | 2 | 105 | 2 | 90 | 2 |
| 65 | 110 | 2 | 116 | 2 | 116 | 2 | 116 | 2 | 130 | 2 | 130 | 2 | 105 | 2 |
| 80 | 121 | 2 | 126 | 2 | 132 | 2 | 132 | 2 | 140 | 2 | 140 | 2 | 120 | 2 |
| 90 | 131 | 2 | 136 | 2 | 145 | 2 | 145 | 2 | 150 | 2 | 150 | 2 | 130 | 2 |
| 100 | 141 | 2 | 151 | 2 | 160 | 2 | 160 | 2 | 160 | 2 | 165 | 2 | 145 | 2 |
| 125 | 176 | 2 | 182 | 2 | 195 | 2 | 195 | 2 | 195 | 2 | 200 | 2 | 170 | 2 |
| 150 | 206 | 2 | 212 | 2 | 230 | 2 | 230 | 2 | 235 | 2 | 240 | 2 | 205 | 2 |
| 175 | 232 | 2 | 237 | 2 | – | – | – | – | – | – | – | – | – | – |
| 200 | 252 | 2 | 262 | 2 | 275 | 2 | 275 | 2 | 280 | 2 | 290 | 2 | 260 | 2 |
| 225 | 277 | 2 | 282 | 2 | – | – | – | – | – | – | – | – | – | – |
| 250 | 317 | 2 | 324 | 2 | 345 | 2 | 345 | 2 | 345 | 2 | 355 | 2 | 315 | 2 |
| 300 | 360 | 3 | 368 | 3 | 395 | 3 | 395 | 3 | 405 | 3 | 410 | 3 | 375 | 3 |
| 350 | 403 | 3 | 413 | 3 | 440 | 3 | 440 | 3 | 450 | 3 | 455 | 3 | 415 | 3 |
| 400 | 463 | 3 | 475 | 3 | 495 | 3 | 495 | 3 | 510 | 3 | 515 | 3 | 465 | 3 |
| 450 | 523 | 3 | 530 | 3 | 560 | 3 | 560 | 3 | – | – | – | – | – | – |
| 500 | 573 | 3 | 585 | 3 | 615 | 3 | 615 | 3 | – | – | – | – | – | – |
| 550 | 630 | 3 | 640 | 3 | 670 | 3 | 670 | 3 | – | – | – | – | – | – |
| 600 | 380 | 3 | 690 | 3 | 720 | 3 | 720 | 3 | – | – | – | – | – | – |
| 650 | 735 | 3 | 740 | 3 | 770 | 5 | 790 | 5 | – | – | – | – | – | – |
| 700 | 785 | 3 | 800 | 3 | 820 | 5 | 840 | 5 | – | – | – | – | – | – |
| 750 | 840 | 3 | 855 | 3 | 880 | 5 | 900 | 5 | – | – | – | – | – | – |
| 800 | 890 | 3 | 905 | 3 | 930 | 5 | 960 | 5 | – | – | – | – | – | – |
| 850 | 940 | 3 | 955 | 3 | 980 | 5 | 1020 | 5 | – | – | – | – | – | – |
| 900 | 990 | 3 | 1005 | 3 | 1030 | 5 | 1070 | 5 | – | – | – | – | – | – |
| 1000 | 1090 | 3 | 1110 | 3 | 1140 | 5 | – | – | – | – | – | – | – | – |
| 1100 | 1200 | 3 | 1220 | 3 | 1240 | 5 | – | – | – | – | – | – | – | – |
| 1200 | 1305 | 3 | 1325 | 3 | 1350 | 5 | – | – | – | – | – | – | – | – |
| 1300 | – | – | – | – | 1450 | 5 | – | – | – | – | – | – | – | – |
| 1350 | 1460 | 3 | 1480 | 3 | 1510 | 5 | – | – | – | – | – | – | – | – |
| 1400 | – | – | – | – | 1560 | 5 | – | – | – | – | – | – | – | – |
| 1500 | 1615 | 3 | 1635 | 3 | 1670 | 5 | – | – | – | – | – | – | – | – |
Dimensions of KS B1503 Flange Facing – Tongue Face and Groove Face
Flange-facing Male & Female Type. Tongue & Groove Type. Dimensions In MM.
| Nominal Dia of Flange | Male & Female Type | Tongue & Groove Type | ||||||||
| C3 | C4 | f3 | f4 | C1 | C2 | C3 | C4 | f3 | f4 | |
| 10 | 38 | 39 | 6 | 5 | 28 | 27 | 38 | 39 | 6 | 5 |
| 15 | 42 | 43 | 6 | 5 | 32 | 31 | 42 | 43 | 6 | 5 |
| 20 | 50 | 51 | 6 | 5 | 38 | 37 | 50 | 51 | 6 | 5 |
| 25 | 60 | 61 | 6 | 5 | 45 | 44 | 60 | 61 | 6 | 5 |
| 32 | 70 | 71 | 6 | 5 | 55 | 54 | 70 | 71 | 6 | 5 |
| 40 | 75 | 76 | 6 | 5 | 60 | 59 | 75 | 76 | 6 | 5 |
| 50 | 90 | 91 | 6 | 5 | 70 | 69 | 90 | 91 | 6 | 5 |
| 65 | 110 | 111 | 6 | 5 | 90 | 89 | 110 | 111 | 6 | 5 |
| 80 | 120 | 121 | 6 | 5 | 100 | 99 | 120 | 121 | 6 | 5 |
| 90 | 130 | 131 | 6 | 5 | 110 | 109 | 130 | 131 | 6 | 5 |
| 100 | 145 | 146 | 6 | 5 | 125 | 124 | 145 | 146 | 6 | 5 |
| 125 | 175 | 176 | 6 | 5 | 150 | 149 | 175 | 176 | 6 | 5 |
| 150 | 215 | 216 | 6 | 5 | 190 | 189 | 215 | 216 | 6 | 5 |
| 20 | 260 | 261 | 6 | 5 | 230 | 229 | 260 | 261 | 6 | 5 |
| 250 | 325 | 326 | 6 | 5 | 295 | 294 | 325 | 326 | 6 | 5 |
| 300 | 375 | 376 | 6 | 5 | 340 | 339 | 375 | 376 | 6 | 5 |
| 350 | 415 | 416 | 6 | 5 | 380 | 379 | 415 | 416 | 6 | 5 |
| 400 | 475 | 476 | 6 | 5 | 440 | 439 | 475 | 476 | 6 | 5 |
Dimensions Tolerance of KS B1503 Pipe Flange
Flange tolerance. Dimensions in mm.
| Flange Section | Surface Condition | Basic Size | Dimensional Tolerance | |
| outside dia. D | as forged(1) | 300 & below | +not specified -2 | |
| over 300 thru 600 | ||||
| over 600 thru 1000 | ||||
| over 1000 thru 1500 | +not specified -3 | |||
| over 1500 | ||||
| finish | 300 & below | 1 | ||
| over 300 thru 600 | 1.5 | |||
| over 600 thru 1000 | 2 | |||
| over 1000 thru 1500 | 2.5 | |||
| over 1500 | 3 | |||
| inside dia | solid flange d(2) | as forged(1) | 16 & below | 1 |
| over 16 thru 63 | 1.5 | |||
| over 63 thru 125 | 2 | |||
| over 125 thru 150 | 2.5 | |||
| over 250 thru 500 | 3 | |||
| over 500 thru 1000 | 4 | |||
| over 1000 | 5, 0 | |||
| slip-on flange do | finish | 100 & below | +0.5, 0 | |
| over 100 thru 400 | +1, 0 | |||
| over 400 thru 600 | +1.5, 0 | |||
| over 600 thru 800 | +2.0, 0 | |||
| over 800 thru 1000 | +2.5, 0 | |||
| over 1000 | +3, 0 | |||
| welding neck flange d | 100 & below | 0, -0.5 | ||
| over 100 thru 400 | 0, -1 | |||
| over 400 thru 600 | 0, -1.5 | |||
| over 600 thru 800 | 0, -2 | |||
| over 800 thru 1000 | 0, -2.5 | |||
| over 1000 | 0, -3 | |||
| bolt hole | bolt circle dia. c | 250 & below | 0.5 | |
| over 250 thru 550 | 0.6 | |||
| over 550 thru 950 | 0.8 | |||
| over 950 thru 1350 | 1 | |||
| over 1350 | 1.5 | |||
| Flange Section | Surface Condition | Basic Size | Dimensional Tolerance | |
| – | 0.5 | |||
| Dia. of hub | Slip-on flange (a) and welding neck flange(d 1) | As forged | 220 & below | +2, 0 |
| over 220 thru 450 | +3, 0 | |||
| over 450 thru 650 | +4, 0 | |||
| over 650 thru 850 | +6, 0 | |||
| over 850 thru 1000 | +7, 0 | |||
| over 1000 | +8, 0 | |||
| Finish | 220 & below | +1, 0 | ||
| over 220 thru 450 | +1.5, 0 | |||
| over 450 thru 650 | +2, 0 | |||
| over 650 thru 850 | +2.5, 0 | |||
| over 850 thru 1000 | +3, 0 | |||
| over 1000 | +3.5, 0 | |||
| Gasket seat | c1,c2,c3, c4 | Finish | 500 & below | 0.3 |
| over 500 thru 1000 | 0.35 | |||
| over1000 thru 1500 | 0.4 | |||
| over 1500 | 0.5 | |||
| f4f3 | Finish | 8 & below | 0.2 | |
| over 8 | 0.25 | |||
| g | Finish | 200 & below | 0.8 | |
| over 200 thru 650 | 0.9 | |||
| over 650 thru 1000 | 1 | |||
| over 1000 | 1.2 | |||
| Thickness t | One-side finish | 20 & below | +1.5, 0 | |
| over 20 thru 50 | +2, 0 | |||
| over50 thru 100 | +3, 0 | |||
| Bolt-side finish | 20 & below | +1, 0 | ||
| over 20 thru 50 | +1.5, 0 | |||
| over 50 thru 100 | +2, 0 | |||
| Hub Height T | Flange with Pipe Inserted | Finish | 50 & below | 1 |
| over 50 thru 100 | 1.5 | |||
| over 100 thru 200 | 2 | |||
| Flange with Bolt-welded Pipe | Finish | over 200 & below | +2, 0 | |
| over 200 thru 300 | +3, 0 | |||
Manufacturing process of Korean Flanges
Korean flanges are known for their high quality standards and durability. But how are Korean flanges manufactured? Here, we will take a look at the manufacturing process of Korean flanges. First, let’s start with the raw materials used to manufacture Korean flanges. These flanges are usually made from carbon steel, stainless steel or alloy steel. The raw material is cut to the desired size and shape using a cutting machine. Next, the raw material is heated to a high temperature in a furnace. This is done to make the material more pliable and easier to use. Once the material has reached the desired temperature, it is placed in a forging machine. The forging process involves forming the material into the desired shape using a series of dies. This is done under high pressure to ensure the flange has the required strength and durability. After the forging process, the flanges are allowed to cool before the machining process is carried out. During this process, the flanges are cut and shaped to the exact dimensions specified in the Korean standard. This is done using various machines, such as lathes and milling machines. Once the machining process is complete, the flanges are ready for quality testing. This includes checking for defects, measuring to ensure the flange meets the required dimensions, and pressure testing to ensure it can withstand the required pressure. Finally, the flanges are cleaned, painted or coated to protect them from corrosion. The flanges are then ready for packaging and shipping to the customer. In summary, the manufacturing process for Korean flanges involves several steps, including raw material selection, forging, machining, and quality testing. These steps ensure that the final product meets the high quality standards required by Korean specifications.
Manufacturing process of Korean forged flange
The forging process usually includes the following processes, i.e. selection of high quality billets, heating, forming and cooling.
- Raw material inspection – The key raw material used to produce flanges is billet or hot rolled bar stock. All raw materials purchased are supplied with test reports in accordance with British Standards with full traceability. This is the first mandatory step in the flange production process to ensure good quality. The raw materials are retested in-house to ensure chemical composition, mechanical properties and metallographic analysis.
- Cutting of raw materials – Correct and strict control of cutting sizes and proportions ensures full cost control.
- Heating – This is a very important step for the quality of the flanges. It is necessary to keep detailed records of heating temperatures to avoid overheating. Overheating can damage the structure of the metal and the mechanical properties of the raw material.
- Forging – The forging process is divided into free forging and die forging. The forging time and strength of flanges vary for different pressure classes.
- Heat treatment-The purpose of heat treatment is to eliminate the stress inside the flange and make the density more uniform. Careful recording of heat treatment temperature and cooling time is the key.
- Inspection of forging blanks – After the heat treatment process, select batch samples are tested again for chemical composition and mechanical properties to ensure that all items pass.
- Machining of forging blanks – During machining, inspection is performed along with machining to ensure that each part of the flange is qualified. Machining is performed on CNC and/or lathes.
- Finished Product Inspection – The finished product will be inspected 100% prior to delivery to ensure that the goods meet Korean, ASME, EN or customer standards.
- Documented Documentation – The entire production process and quality checks at different levels are documented according to Korean compliant standard operating procedures. This is the guarantee of good quality.
- Test certificates: As we are an Korean and PED certified manufacturer, we can issue test certificates for all goods upon delivery and inspection in accordance with British Standards.
- Packaging: All forgings and flanges are packed in wooden boxes or crates or pallets to ensure safe movement of the goods.
Production process of Korean casting flange
The production process of a Korean casting flange typically involves several steps, including the creation of a mold or pattern, the casting of the flange using molten metal, and various finishing and quality control steps. To begin the process, a mold or pattern is created using a material such as wood or metal. This mold or pattern will be used to create the shape of the flange, and will typically be made to precise specifications to ensure that the final product meets the desired dimensions and specifications. Once the mold or pattern is ready, the casting process can begin. This typically involves melting the metal that will be used to create the flange, such as iron or steel, and pouring the molten metal into the mold or pattern. The metal is then allowed to cool and solidify, taking on the shape of the mold or pattern. After the casting process is complete, the flange will typically undergo various finishing and quality control steps. This may include machining or grinding to achieve the desired dimensions and surface finish, as well as testing to ensure that the flange meets the required specifications and standards. Overall, the production process for a Korean casting flange is a highly precise and technical process that requires a thorough understanding of metallurgy, casting techniques, and quality control processes.
Manufacturing process of Korean plate cutting flange
The process here is relatively simple, and the key raw material is hot rolled plate. The process is mainly used to produce lower thickness sliding plate flanges and blind flanges. All plates purchased are accompanied by a test certificate to Korean Standards. The circles are cut from the plates. No heat treatment is involved in the flange manufacturing process. Drilling and machining is carried out on the circles to obtain the required dimensions. The goods are visually inspected and marked in accordance with the relevant standards.
Marking of Korean Flanges
KS flanges are typically marked with the following information:
- Flange size: The size of the flange is typically marked as a numerical value, such as “150” for a 150mm flange.
- Flange type: The type of flange, such as a slip-on flange or a weld neck flange, is typically marked on the flange.
- Pressure rating: The maximum pressure that the flange can withstand is typically marked on the flange, usually in K or kg/cm2.
- Material: The material that the flange is made of, such as carbon steel or stainless steel, is typically marked on the flange.
- Manufacturer: The manufacturer of the flange is typically marked on the flange, along with the manufacturer’s logo or trademark.
- Other markings: Other markings that may be found on KS flanges include the flange’s dimensional tolerances, surface finish, and any applicable certification or inspection marks.
Packing of Korean Flanges
Packaging of KS flanges is an important step in the pipeline transportation and installation process as it helps to protect KS flanges from damage during transportation and handling. In this blog post, we will cover the basics of KS flange packaging and some best practices to follow. First, let’s define what a KS flange is. KS flanges are connectors used to join two pipes, valves or other devices together. They usually have raised edges or flanges that help seal the connection and prevent leaks. Flanges are used in a variety of industries, including oil and gas, chemical processing and water treatment. Now, on to the packing of KS flanges. When packing KS flanges for shipping or storage, it is important to use materials that will protect the KS flange from damage. This includes using sturdy boxes or containers, as well as using packaging materials such as bubble wrap or foam board to cushion the KS flange. In addition to using protective packaging materials, it is also important to properly secure the KS flange in the package. This can be done using straps, tape or other fastening methods to ensure that the KS flange does not move or shift during transport. There are also some best practices to follow when packaging KS flanges. One of these is to properly mark the package, including information such as the size and type of KS flange, as well as any special handling instructions. This will help ensure that the KS flanges are handled properly during shipping and storage. Another important best practice is to properly stack KS flanges when packaging them. This will help prevent damage to the KS flange and make it easier to open and access when needed. In summary, packaging of KS flanges is an important step in the pipeline transportation and installation process. By using protective packaging materials, securing the KS flange properly in the package, and following best practices (such as proper labeling and stacking), you can help ensure that the KS flange is protected and ready to use when it arrives at its destination.
Inspection and measurement of Korean Flanges
There are several inspection and measurement techniques that can be used to ensure the quality and integrity of KS flanges. These techniques may include visual inspection, dimensional inspection and testing for defects such as cracks, corrosion and weld defects. Some of the specific measurements that may be taken during inspection include the diameter, thickness and overall dimensions of the flange. The surface finish, flatness and alignment of the flange face may also be inspected. In addition, the size, shape and alignment of the flange bolt holes may be inspected. When inspecting and measuring KS flanges, it is important to use accurate and precise measuring tools because even small variations in size or shape can have a significant impact on the performance and safety of the pipe or piping system. A KS flange is a type of flange used in piping systems. There are several ways to inspect and measure KS flanges.
- Visual inspection: This involves checking the flange for any visible defects, such as cracks, dents or corrosion.
- Dimensional inspection: This involves measuring the dimensions of the flange to ensure it meets the specified requirements. This may include measurements such as outside diameter, inside diameter and thickness.
- Hardness testing: This involves testing the hardness of the flange material to ensure that it is suitable for the intended application.
- Pressure testing: This involves testing the pressure resistance of the flange by applying a pressurized fluid to the flange and measuring the pressure drop.
- Leak testing: This involves testing the flange for leaks by applying pressurized fluid to the flange and checking for leaks.
It is important to regularly inspect and test KS flanges to ensure that they are in good condition and suitable for their intended application.
Installation of Korean Flanges
The following are the steps for installing KS flanges. First, measure and mark the pipe where the flange will be installed. Make sure to leave enough space for the flange and bolts. Use a pipe cutting tool to cut the pipe at the marked location. If you are using a pipe wrench, you can loosen the pipe and cut it with a saw. Place the gasket between the two flanges. Make sure it is centered and properly aligned. Place the flange on the pipe, aligning the bolt holes with the holes in the flange. Use bolts and nuts to secure the flange to the pipe. Use a hammer to tighten the bolts. Make sure the bolts are tightened evenly to ensure proper sealing. Test the connection by slowly filling the piping system with water or other fluids. Look for any leaks or other problems. If there are no problems, the flange is installed correctly. When installing KS flanges, be sure to follow proper safety precautions, including wearing protective equipment and following proper lifting techniques. It is also a good idea to consult the manufacturer’s instructions and any applicable building codes or regulations.
Application of Korean Flanges
KS flanges are commonly used in various industries, including:
- Oil and gas: KS flanges are used to connect pipes, valves, and other equipment in the oil and gas industry. They are often used in high-pressure and high-temperature environments, making them ideal for this industry.
- Chemical and pharmaceutical: KS flanges are used in chemical and pharmaceutical plants to connect pipes and equipment. They are resistant to corrosion, making them suitable for use in these harsh environments.
- Water and wastewater treatment: KS flanges are used in water and wastewater treatment plants to connect pipes and equipment. They are resistant to corrosion, making them ideal for use in these environments.
- Power generation: KS flanges are used in power generation plants to connect pipes and equipment. They are able to withstand high temperatures and pressures, making them suitable for use in this industry.
- Food and beverage: KS flanges are used in food and beverage processing plants to connect pipes and equipment. They are resistant to corrosion and are able to withstand high temperatures, making them suitable for use in these environments.
How to purchase the correct KS flanges?
Does your piping system need some new KS flanges? Purchasing the right flanges is critical to ensuring the overall integrity and efficiency of your system. However, with so many different types of flanges available, it can be difficult to know which one is right for your needs. First, it’s important to consider the material of the flange. Different materials are suitable for different applications, so it is critical to choose a flange that is compatible with the fluids and gases flowing through your piping system. KS flanges are available in different materials, such as carbon steel, stainless steel and cast iron. Carbon steel is a popular choice because it is strong and durable, but prone to corrosion. Stainless steel is more resistant to corrosion and is commonly used in food processing and chemical plants. Cast iron is strong and durable, but it is heavy and not as resistant to corrosion as stainless steel. Another important factor to consider is the pressure rating of the flange. Flanges are designed to handle different pressure ratings, so it is important to choose a flange that can handle the pressure requirements of the system. A higher pressure rating usually means a more rugged flange, but it can also carry a higher price tag. The size of the flange is also an important factor to consider. You need to choose a flange that fits your piping system, as flanges that are too small or too large may cause problems such as leaks or reduced efficiency. Before purchasing a flange, be sure to carefully measure the diameter of the pipe to ensure proper installation. It is also a good idea to consider the type of flange needed. There are several different types of flanges available, including slip-on flanges, butt-weld flanges and threaded flanges. Each type has its own unique features and benefits, so be sure to choose the right type for your specific application. Purchasing the correct KS flange for your piping system is critical to ensuring the overall efficiency and integrity of your system. Be sure to consider the flange material, pressure rating, size and type to select the right flange for your needs.
How to select KS flanges manufacturer?
When choosing a KS flange manufacturer, there are several factors to consider:
- Quality: Look for a manufacturer that is known for producing high quality KS flanges. You can do this by reading customer reviews, seeking advice from industry professionals, or contacting the manufacturer directly to ask about their quality control processes.
- Certification: It is important to choose a manufacturer that is certified to produce flanges that meet Korean standards. This ensures that the KS flange meets the necessary safety and performance requirements.
- Price: Consider the cost of KS flanges from different manufacturers, but also keep in mind that the lowest price is not always the best price. It is important to balance cost, quality and reliability.
- Delivery: If you need a KS flange delivered quickly, choose a manufacturer that can deliver KS flanges in a timely manner.
- Customer service: Look for a manufacturer who can meet your needs and provide good customer service. This can make a big difference if you have any questions or problems with the process.
- Manufacturing capabilities: Make sure the manufacturer has the necessary equipment and expertise needed to produce the type of KS flange you need.
By considering these factors, you can choose a manufacturer that will provide you with high quality KS flanges at competitive prices with good customer service and fast turnaround times.
Export Country For Korean Flanges
| MIDDLE EAST | AFRICA | NORTH AMERICA | EUROPE | ASIA | SOUTH AMERICA |
| Saudi Arabia | Nigeria | Usa | Russia | India | Argentina |
| Iran | Algeria | Canada | Norway | Singapore | Bolivia |
| Iraq | Angola | Mexico | Germany | Malaysia | Brazil |
| Uae | South Africa | Panama | France | Indonesia | Chile |
| Qatar | Libya | Costa Rica | Italy | Thailand | Venezuela |
| Bahrain | Egypt | Puerto Rica | Uk | Vietnam | Colombia |
| Oman | Sudan | Trinidad And Tobago | Spain | South Korea | Ecuador |
| Kuwait | Equatorial Guinea | Jamaica | Ukraine | Japan | Guyana |
| Turkey | The Republic Of Congo | Bahamas | Netherland | Sri Lanka | Paraguay |
| Yemen | Gabon | Denmark | Belgium | Maldives | Uruguay |
| Syria | Greece | Bangladesh | |||
| Jordan | Czech Republic | Mayanmar | |||
| Cyprus | Portugal | Taiwan | |||
| Hungary | Cambodia | ||||
| Albania | |||||
| Austria | |||||
| Switzerland | |||||
| Slovakia | |||||
| Finland | |||||
| Ireland | |||||
| Croatia | |||||
| Slovenia | |||||
| Malta |
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