Dimensions of PN2.5 flange cover GB/T9124.1-2019

/ / Published in FLANGE

    1. Standard Reference: Obtain a copy of the GB/T 9124.1-2019 standard, which outlines flange dimensions for various pressure ratings, including PN2.5.

    2. Check Key Dimensions: For a PN2.5 flange cover, you will need:

      • Outer diameter
      • Bolt circle diameter
      • Number and size of bolt holes
      • Flange thickness

    3. Contact Suppliers: Flange manufacturers or suppliers can provide detailed specifications and dimensions for specific flange ratings.

    4. Engineering Tools: Use engineering software or tools that include standard flange dimensions.

 

Dimensions of PN2.5 flange cover~GB/T9124.1-2019

 Nominal size

DN		  Connection size  Flange cover thickness 

C /mm		  Seal surface diameter

d /mm		  Sealing surface height

f 1 /mm
 Flange outer diameter 

D /mm		  Bolt hole center circle diameter

K /mm		  Bolt hole diameter

L /mm		  bolt
 quantity 

n / number		  Thread

 Specification
10 75 50 11 4 M10 12 35 2
15 80 55 11 4 M10 12 40 2
20 90 65 11 4 M10 14 50 2
25 100 75 11 4 M10 14 60 2
32 120 90 14 4 M12 14 70 2
40 130 100 14 4 M12 14 80 3
50 140 110 14 4 M12 14 90 3
65 160 130 14 4 M12 14 110 3
80 190 150 18 4 M16 16 128 3
100 210 170 18 4 M16 16 148 3
125 240 200 18 8 M16 18 178 3
150 265 225 18 8 M16 18 202 3
200 320 280 18 8 M16 20 258 3
250 375 335 18 12 M16 22 312 3
300 440 395 22 12 M20 22 365 4
350 490 445 22 12 M20 22 415 4
400 540 495 22 16 M20 22 455 4
450 595 550 22 16 M20 24 520 4
500 645 600 22 20 M20 24 570 4
600 755 705 26 20 M24 30 670 5
700 860 810 26 24 M24 40(36) 775 5
800 975 920 30 24 M27 44(38) 880 5
900 1075 1020 30 24 M27 48(40) 980 5
1000 1175 1120 30 28 M27 52(42) 1080 5
1200 1375 1320 30 32 M27 50(40) 1280 5

Note: Flanges with nominal sizes DN10~DN1000 use the size of PN6 flange.

The original flange standard thickness dimensions are in brackets. The flange thickness dimensions in brackets can still be used with the approval of both the supplier and the buyer.

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