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碳钢螺纹法兰是指采用螺纹与管道连接的一种法兰。这种连接方式简单快捷，不需要复杂的焊接或螺栓固定，具有安装、维修方便的特点，可在一些现场不允许焊接的管线上使用。螺纹法兰广泛应用于石油、化工、电力、冶金、制药等工业领域，用于连接各种管道、阀门、泵等设备。
碳钢螺纹法兰的规格
Size Range | 1/2" - 24" / DN15 - DN600 |
Pressure Rating | Class 150, 300, 600, 900, 1500, 2500lb |
Standard | ASME B16.5, EN1092-1 |
Carbon Steel | ASTM A105 / A105N |
美标和欧标碳钢法兰的材质差异
碳钢的生产标准有ASME B16.5和EN1092-1两种，其中ASME B16.5的材料等级为ASTM A105,EN1092-1的材料标准有P235GH，250GH，280GH等。
ASTM A105 化学成分
CHEMICAL | LIMITS | C | Mn | P | S | Si | Cu | Ni | Cr | Mo | V |
ASTM A105 | MIN | 0.60 | 0.10 | ||||||||
MAX | 0.35 | 1.05 | 0.035 | 0.040 | 0.35 | 0.40 | 0.40 | 0.30 | 0.12 | 0.08 |
机械性能
MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % | HARDNESS |
ASTM A105 | 485 min | 250 min | 22 min | 30 min | 197 max |
CHEMICAL | LIMITS | C | Si | Mn | P | S | Cr | Mo | Ni | Al | Cu | Nb | Ti | V | Cr+Cu+Mo+Ni |
P235GH(1.0345) | MIN | 0.02 | |||||||||||||
MAX | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 | 0.30 | 0.08 | 0.30 | 0.3 | 0.01 | 0.04 | 0.02 | 0.7 |
机械性能
MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | Impact Properties |
P235GH(1.0345) | 360-500 | 235 min | 25 min | 40min(0℃) |
美标法兰遵循的是以美国ASME为代表的美洲法兰标准体系，该体系具有严格的规范和标准，确保了产品的互换性和可靠性。相比之下，国际市场上的互换性可能受到一定限制，在需要承受高温高压的工业环境中往往对法兰的强度和密封性有极高的要求，而美标法兰能够很好地满足这些要求。这种性能表现使得美标法兰在石油、化工、天然气等行业中得到广泛应用。
碳钢螺纹法兰的尺寸和重量
螺纹法兰的尺寸从1/2" -到24"，压力等级有150#，300#， 600#, 900#, 1500#, 2500#
Class 150螺纹法兰尺寸和重量
NPS | A | C | D | E | F | G | H | I | J | W |
inch | inch | inch | inch | inch | inch | No. of Holes | inch | inch | kg/pc | |
mm | mm | mm | mm | mm | mm | mm | mm | |||
1/2 | 3.50 | 0.44 | 0.62 | 0.62 | 1.19 | 1.38 | 4 | 0.62 | 2.38 | 0.39 |
88.90 | 11.20 | 15.70 | 15.70 | 30.20 | 35.10 | 15.70 | 60.45 | |||
3/4 | 3.88 | 0.50 | 0.62 | 0.62 | 1.50 | 1.69 | 4 | 0.62 | 2.75 | 0.56 |
98.60 | 12.70 | 15.70 | 15.70 | 38.10 | 42.90 | 15.70 | 69.85 | |||
1 | 4.25 | 0.56 | 0.69 | 0.69 | 1.94 | 2.00 | 4 | 0.62 | 3.12 | 0.78 |
108.00 | 14.20 | 17.50 | 17.50 | 49.30 | 50.80 | 15.70 | 79.25 | |||
1 1/4 | 4.62 | 0.62 | 0.81 | 0.81 | 2.31 | 2.50 | 4 | 0.62 | 3.50 | 1.03 |
117.30 | 15.70 | 20.60 | 20.60 | 58.70 | 63.50 | 15.70 | 88.90 | |||
1 1/2 | 5.00 | 0.69 | 0.88 | 0.88 | 2.56 | 2.88 | 4 | 0.62 | 3.88 | 1.32 |
127.00 | 17.50 | 22.40 | 22.30 | 65.00 | 73.15 | 15.70 | 98.60 | |||
2 | 6.00 | 0.75 | 1.00 | 1.00 | 3.06 | 3.62 | 4 | 0.75 | 4.75 | 2.06 |
152.40 | 19.10 | 25.40 | 25.40 | 77.70 | 91.90 | 0.75 | 4.75 | |||
2 1/2 | 7.00 | 0.88 | 1.12 | 1.12 | 3.56 | 4.12 | 4 | 0.75 | 5.50 | 3.28 |
177.80 | 22.40 | 28.40 | 28.40 | 90.40 | 104.60 | 19.10 | 139.70 | |||
3 | 7.50 | 0.94 | 1.19 | 1.19 | 4.25 | 5.00 | 4 | 0.75 | 6.00 | 3.85 |
190.50 | 23.90 | 30.20 | 30.20 | 108.00 | 127.00 | 19.10 | 152.40 | |||
3 1/3 | 8.50 | 0.94 | 1.25 | 1.25 | 4.81 | 5.50 | 8 | 0.75 | 7.00 | 4.81 |
215.90 | 23.90 | 31.75 | 31.75 | 122.20 | 139.70 | 19.10 | 177.80 | |||
4 | 9.00 | 0.94 | 1.31 | 1.31 | 5.31 | 6.19 | 8 | 0.75 | 7.50 | 5.3 |
228.60 | 23.90 | 33.30 | 33.30 | 134.90 | 157.20 | 19.10 | 190.50 | |||
5 | 10.00 | 0.94 | 1.44 | 1.44 | 6.44 | 7.31 | 8 | 0.88 | 8.50 | 6.07 |
254.00 | 23.90 | 36.60 | 36.60 | 163.60 | 185.70 | 22.40 | 215.90 | |||
6 | 11.00 | 1.00 | 1.56 | 1.56 | 7.56 | 8.50 | 8 | 0.88 | 9.50 | 7.45 |
279.40 | 25.40 | 39.60 | 39.60 | 192.00 | 215.90 | 22.40 | 241.30 | |||
8 | 13.50 | 1.12 | 1.75 | 1.75 | 9.69 | 10.62 | 8 | 0.88 | 11.75 | 12.1 |
342.90 | 28.40 | 44.50 | 44.50 | 246.10 | 269.70 | 22.40 | 298.50 | |||
10 | 16.00 | 1.19 | 1.94 | 1.94 | 12.00 | 12.75 | 12 | 1.00 | 14.25 | 16.5 |
406.40 | 30.20 | 49.30 | 49.30 | 304.80 | 323.90 | 25.40 | 362.00 | |||
12 | 19.00 | 1.25 | 2.19 | 2.19 | 14.38 | 15.00 | 12 | 1.00 | 17.00 | 26.2 |
482.60 | 31.75 | 55.60 | 55.60 | 365.30 | 381.00 | 25.40 | 431.80 | |||
14 | 21.00 | 1.38 | 2.25 | 2.25 | 15.75 | 16.25 | 12 | 1.12 | 18.75 | 34.6 |
533.40 | 35.10 | 57.15 | 57.15 | 400.10 | 412.70 | 28.40 | 476.30 | |||
16 | 23.50 | 1.44 | 2.50 | 2.50 | 18.00 | 18.50 | 16 | 1.12 | 21.25 | 44.8 |
596.90 | 36.60 | 63.50 | 63.50 | 457.20 | 469.90 | 28.40 | 539.80 | |||
18 | 25.00 | 1.56 | 2.69 | 2.69 | 19.88 | 21.00 | 16 | 1.25 | 22.75 | 48.9 |
635.00 | 39.60 | 68.30 | 68.30 | 505.00 | 533.40 | 31.75 | 577.90 | |||
20 | 27.50 | 1.69 | 2.88 | 2.88 | 22.00 | 23.00 | 20 | 1.25 | 25.00 | 61.9 |
698.50 | 42.90 | 73.15 | 73.15 | 558.80 | 584.20 | 31.75 | 635.00 | |||
24 | 32.00 | 1.88 | 3.25 | 3.25 | 26.12 | 27.25 | 20 | 1.38 | 29.50 | 86.9 |
812.80 | 47.80 | 82.60 | 82.60 | 663.40 | 692.20 | 35.10 | 749.30 |
| FlangeData | Hub | Raised | DrillingData | Weight | ||||||||
| Face | ||||||||||||
| Nominal PipeSize | A | B | C | D | E | F | G | H | I | J | kg/ piece | |
| Outside | Diameter | Counter- | Flange | Overall | Threaded | Hub | Face | Number of Holes | BoltHole | Diameter | ||
| Diameter | Overall | bore min | Thickness min | Length | length min | Diameter | Diameter | Diameter | of Circle of Holes | |||
| in | in | in | in | in | in | in | in | in | in | |||
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||
| 1/2 | 0.84 | 4.75 | 0.93 | 0.88 | 1.25 | 0.88 | 1.5 | 1.38 | 4 | 0.88 | 3.25 | 1.74 |
| 21.3 | 120.6 | 23.6 | 22.3 | 31.7 | 22.3 | 38.1 | 35.1 | 22.3 | 82.5 | |||
| 3/4 | 1.05 | 5.12 | 1.14 | 1 | 1.38 | 1 | 1.75 | 1.69 | 4 | 0.88 | 3.5 | 2.34 |
| 26.7 | 130 | 29 | 25.4 | 35 | 25.4 | 44.4 | 42.9 | 22.3 | 88.9 | |||
| 1 | 1.315 | 5.88 | 1.41 | 1.12 | 1.62 | 1.12 | 2.06 | 2 | 4 | 1 | 4 | 3.44 |
| 33.4 | 149.3 | 35.8 | 28.4 | 41.1 | 28.4 | 52.3 | 50.8 | 25.4 | 101.6 | |||
| 1 1/4 | 1.66 | 6.25 | 1.75 | 1.12 | 1.62 | 1.19 | 2.5 | 2.5 | 4 | 1 | 4.38 | 3.91 |
| 42.2 | 158.7 | 44.4 | 28.4 | 41.1 | 30.2 | 63.5 | 63.5 | 25.4 | 111.2 | |||
| 1 1/2 | 1.9 | 7 | 1.99 | 1.25 | 1.75 | 1.25 | 2.75 | 2.88 | 4 | 1.12 | 4.88 | 5.36 |
| 48.3 | 177.8 | 50.5 | 31.7 | 44.5 | 31.7 | 69.85 | 73.15 | 28.4 | 123.9 | |||
| 2 | 2.375 | 8.5 | 2.5 | 1.5 | 2.25 | 1.5 | 4.12 | 3.62 | 8 | 1 | 6.5 | 9.85 |
| 60.3 | 215.9 | 63.5 | 38.1 | 57.15 | 38.1 | 104.6 | 91.9 | 25.4 | 165.1 | |||
| 2 1/2 | 2.875 | 9.62 | 3 | 1.62 | 2.5 | 1.88 | 4.88 | 4.12 | 8 | 1.12 | 7.5 | 13.7 |
| 73 | 244.3 | 76.2 | 41.1 | 63.5 | 47.7 | 123.9 | 104.6 | 28.4 | 190.5 | |||
| 3 | 3.5 | 9.5 | 3.63 | 1.5 | 2.12 | 1.62 | 5 | 5 | 8 | 1 | 7.5 | 11.6 |
| 88.9 | 241.3 | 92.2 | 38.1 | 53.8 | 41.1 | 127 | 127 | 25.4 | 190.5 | |||
| 4 | 4.5 | 11.5 | 4.63 | 1.75 | 2.75 | 1.88 | 6.25 | 6.19 | 8 | 1.25 | 9.25 | 19.7 |
| 114.3 | 292.1 | 117.6 | 44.4 | 69.85 | 47.8 | 158.7 | 157.2 | 31.7 | 234.9 | |||
| 5 | 5.563 | 13.75 | 5.69 | 2 | 3.12 | 2.12 | 7.5 | 7.31 | 8 | 1.38 | 11 | 31.9 |
| 141.3 | 349.2 | 144.5 | 50.8 | 79.25 | 53.8 | 190.5 | 185.7 | 35 | 279.4 | |||
| 6 | 6.625 | 15 | 6.75 | 2.19 | 3.38 | 2.25 | 9.25 | 8.5 | 12 | 1.25 | 12.5 | 41.1 |
| 168.3 | 381 | 171.4 | 55.6 | 85.8 | 57.15 | 234.9 | 215.9 | 31.7 | 317.5 | |||
| 8 | 8.625 | 18.5 | 8.75 | 2.5 | 4 | 2.5 | 11.75 | 10.62 | 12 | 1.5 | 15.5 | 70.7 |
| 219.1 | 469.9 | 222.2 | 63.5 | 101.6 | 63.5 | 298.4 | 269.7 | 38.1 | 393.7 | |||
| 10 | 10.75 | 21.5 | 10.88 | 2.75 | 4.25 | 2.81 | 14.5 | 12.75 | 16 | 1.5 | 18.5 | 101 |
| 273 | 546.1 | 276.3 | 69.85 | 107.9 | 71.4 | 368.3 | 323.9 | 38.1 | 469.9 | |||
| 12 | 12.75 | 24 | 12.94 | 3.12 | 4.62 | 3 | 16.5 | 15 | 20 | 1.5 | 21 | 133 |
| 323.8 | 609.6 | 328.7 | 79.4 | 117.3 | 76.2 | 419.1 | 381 | 38.1 | 533.4 | |||
| 14 | 14 | 25.25 | 14.19 | 3.38 | 5.12 | 3.25 | 17.75 | 16.25 | 20 | 1.62 | 22 | 153 |
| 355.6 | 641.3 | 360.4 | 85.7 | 130 | 82.5 | 450.8 | 412.7 | 41.1 | 558.8 | |||
| 16 | 16 | 27.75 | 16.19 | 3.5 | 5.25 | 3.38 | 20 | 18.5 | 20 | 1.75 | 24.25 | 185 |
| 406.4 | 704.8 | 411.2 | 88.9 | 133.3 | 85.9 | 508 | 469.9 | 44.4 | 618.9 | |||
| 18 | 18 | 31 | 18.19 | 4 | 6 | 3.5 | 22.25 | 21 | 20 | 2 | 27 | 258 |
| 457.2 | 787.4 | 462 | 101.6 | 152.4 | 88.9 | 565.1 | 533.4 | 50.8 | 685.8 | |||
| 20 | 20 | 33.75 | 20.19 | 4.25 | 6.25 | 3.62 | 24.5 | 23 | 20 | 2.12 | 29.5 | 317 |
| 508 | 857.2 | 512.8 | 107.9 | 158.7 | 91.9 | 622.3 | 584.2 | 53.8 | 749.3 | |||
| 24 | 24 | 41 | 24.19 | 5.5 | 8 | 4 | 29.5 | 27.25 | 20 | 2.62 | 35.5 | 606 |
| 609.6 | 1041.4 | 614.4 | 139.7 | 203.2 | 101.6 | 749.3 | 692.2 | 66.55 | 901.7 | |||
螺纹法兰的用途
●工业管道连接
螺纹法兰被广泛用于连接管道系统中的管道、阀门和设备，确保整个系统的完整性和功能性。通过使用锻制法兰，可以实现管道之间的紧密连接，同时提供可靠的密封性能，有效防止介质泄漏，保障工业生产的连续性和安全性。
●石油和天然气行业
它们被广泛应用于油井的管道系统中，用于连接不同部分的管道，确保油气的顺畅流动。此外，这些法兰还用于输送管道的建设，它们能够在长距离输送过程中保持管道的完整性和密封性，防止油气泄漏，确保生产安全。
●化工和制药行业
螺纹法兰被广泛应用于化工反应器、储罐以及复杂的管道系统中，确保了生产过程的连续性和安全性。这些法兰不仅需要承受化学反应中可能产生的高压和高温，还要能够抵抗各种腐蚀性介质的侵蚀，从而保证设备的长期稳定运行。
