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Plate Flange

Plate Flange

A plate flange is a type of flange commonly used in piping systems and mechanical applications to connect pipes, valves, pumps, and other equipment. It provides a secure connection point, ensures tight sealing, and is widely used across industries like petrochemicals, oil and gas, water treatment, and construction.

Types of Plate Flanges:

  • Flat-Face (FF) Plate Flange: Used in low-pressure applications where the flange surface is entirely flat.
  • Raised-Face (RF) Plate Flange: Features a raised surface around the central hole for improved gasket sealing.
stainless-steel-plate-flange
Flat-Face (FF) Plate Flange
en-1092-1-type-02
Raised-Face (RF) Plate Flange

Plate Flange Dimension

Class 150 Plate Flanges Dimensions

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1/2″88,911,134,930,222,360,3415,90,400
3/4″98,412,742,938,127,769,8415,90,700
1″107,914,350,849,234,579,4415,90,800
1 1/4″117,515,963,558,843,288,9415,91,100
1 1/2″127,017,573,065,149,598,4415,91,400
2″152,419,092,177,862,0120,6419,02,200
2 1/2″177,822,2104,890,574,7139,7419,03,600
3″190,523,8127,0107,990,7152,4419,04,100
3 1/2″215,923,8139,7122,2103,4177,8819,05,200
4″228,623,8157,2134,9116,1190,5819,05,600
5″254,023,8185,7163,6143,8215,9822,26,300
6″279,425,4215,9192,1170,7241,3822,27,500
8″342,928,6269,9246,1221,5298,4822,212,600
10″406,430,2323,8304,8276,3361,91225,418,500
12″482,631,7381,0365,1327,1431,81225,528,000
14″533,434,9412,7400,0359,1476,21228,636,000
16″596,936,5469,9457,2410,5539,71628,646,000
18″635,039,7533,4504,8461,8577,81631,750,000
20″698,542,9584,2558,8513,1635,02031,764,000
22″749,346,0641,2609,6564,4692,12034,972,000
24″812,847,6692,1663,6615,9749,32034,989,000

Class 300 Plate Flanges Dimensions

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1/2″95,614,334,938,122,366,7415,90,700
3/4″117,515,942,947,627,782,5419,01,100
1″123,817,550,854,034,588,9419,01,400
1 1/4″133,319,063,563,543,298,4419,01,800
1 1/2″155,620,673,069,849,5114,3422,22,600
2″165,122,292,184,162,0127,0819,03,400
2 1/2″190,525,4104,8100,074,7149,2822,24,400
3″209,528,6127,0117,590,7168,3822,26,100
3 1/2″228,630,2139,7133,3103,4184,1822,27,500
4″254,031,7157,2146,0116,1200,0822,210,100
5″279,434,9185,7177,8143,8234,9822,212,500
6″317,536,5215,9206,4170,7269,91222,214,100
8″381,041,3269,9260,3221,5330,21225,424,800
10″444,547,6323,8320,7276,3387,31628,637,100
12″520,750,8381,0374,6327,1450,81631,750,000
14″584,254,0412,7425,4359,1514,32031,770,000
16″647,757,1469,9482,6410,5571,52034,990,000
18″711,260,3533,4533,4461,8628,62434,91,12,000
20″774,763,5584,2584,2513,1685,82434,91,33,000
22″838,266,7641,2641,2564,4742,92441,31,97,000
24″914,469,8692,1701,7615,9812,82441,32,08,000

Class 600 Plate Flanges Dimensions

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1/2″95,214,334,938,122,366,7415,90,800
3/4″117,515,942,947,627,782,5419,01,400
1″123,817,550,854,034,588,9419,01,600
1 1/4″133,320,663,563,543,298,4419,02,100
1 1/2″155,622,273,069,849,5114,3422,23,100
2″165,125,492,184,162,0127,0819,03,700
2 1/2″190,528,6104,8100,074,7149,2822,25,400
3″209,531,7127,0117,590,7168,3822,27,300
3 1/2″228,634,9139,7133,3103,4184,1825,48,900
4″273,038,1157,2152,4116,1215,9825,411,800
5″330,244,4185,7188,9143,8266,7828,624,500
6″355,647,6215,9222,2170,7292,11228,629,500
8″419,155,6269,9273,0221,5349,21231,743,000
10″508,063,5323,8342,8276,3431,81634,970,000
12″558,866,7381,0400,0327,1488,92034,986,000
14″603,269,8412,7431,8359,1527,02038,11,00,000
16″685,876,2469,9495,3410,5603,22041,31,42,000
18″742,982,5533,4546,1461,8654,02044,41,75,000
20″812,888,9584,2609,6513,1723,92444,42,32,000
22″869,995,2641,2666,7564,4777,92447,62,92,000
24″939,8101,6692,1717,5615,9838,22450,83,30,000

Design

  • Plate flanges are usually flat and circular in shape.
  • They feature a central hole for the pipe connection and are machined to create a smooth, flat surface.
  • They often include bolt holes around the circumference for fastening.

Advantages

  • Cost-effective.
  • Simple installation.
  • Versatile and widely available.

Applications

  • Water pipelines.
  • Oil and gas transport systems.
  • Industrial manufacturing setups.
  • Chemical processing plants.

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