DINGSHENG PIPE INDUSTRY

AS 4087 PN16 & PN21 Flange

STEEL BACKING FLANGES AS 4087 – Figure B7

AS 4087 PN16 & PN21 Flange

Nominal Pipe OD Flange Size OD ID Minimum Thickness PCD Bolt Hole No. x Dia. Bolt Size
63 50 150 78 11 114 4X18 M16
75 65 165 92 11 127 4X18 M16
90 80 185 108 11 146 4X18 M16
110 100 215 128 13 178 4X18 M16
160 150 280 178 13 235 8X18 M16
200 200 335 235 19 292 8X18 M16
225 225 370 238 19 324 8X18 M16
250 250 405 288 19 356 8X22 M20
315 300 455 338 23 406 12X22 M20
355 350 525 376 30 470 12X26 M24
n/a 375 550 n/a 30 495 12X26 M24
400 400 580 430 30 521 12X26 M24
450 450 640 470 30 584 12X26 M24
500 500 705 533 38 641 16X26 M24
630 600 825 645 48 756 16X30 M27
710 700 910 740 56 845 20X30 M27
n/a 750 995 n/a 56 927 20X33 M30
800 800 1060 843 56 984 20X36 M33
900 900 1175 947 66 1092 24X36 M33
1000 1000 1255 1050 66 1175 24X36 M33

Note: This table has bolting compatibility with AS 2129 Table D flanges.
As per ISO 9624: “The inside diameter of the loose backing flange shall conform to the design of the flange adaptor. In some applications, values of the inside diameter of the loose backing flange differing from those given in the tables may be used.”

STEEL BACKING FLANGES AS 4087 – Figure B8 

AS 4087 PN16 & PN21 Flange 01

Nominal Pipe OD Flange Size OD ID Minimum Thickness PCD Bolt Hole No. x Dia. Bolt Size
63 50 165 78 15 127 4X18 M16
75 65 185 92 15 146 8X18 M16
90 80 205 108 15 165 8X18 M16
110 100 230 128 19 191 8X18 M16
160 150 305 178 24 260 12X22 M20
200 200 370 235 24 324 12X22 M20
225 225 405 238 30 356 12X26 M24
250 250 430 288 30 381 12X26 M24
315 300 490 338 30 438 16X26 M24
355 350 550 376 30 495 16X30 M27
n/a 375 580 n/a 38 521 16X30 M27
400 400 610 430 38 552 20X30 M27
450 450 675 470 38 610 20X33 M30
500 500 735 533 48 673 24X33 M30
630 600 850 645 58 781 24X36 M33
710 700 935 740 58 857 24X36 M33
n/a 750 1015 n/a 58 940 28X36 M33
800 800 1060 843 68 984 28X36 M33
900 900 1185 947 68 1105 32X39 M36
1000 1000 1275 1050 78 1194 36X39 M36

Note: This table has bolting compatibility with AS 2129 Table F & H flanges.
As per ISO 9624: “The inside diameter of the loose backing flange shall conform to the design of the flange adaptor. In some applications, values of the inside diameter of the loose backing flange differing from those given in the tables may be used.”