Charts & Specs

Allowable Pressures for Test BlANKS

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Allowable Pressures for Test Blanks
Plate Material: - SA 516-70 Allow. Stress: 34,200 psi
  1" 1.5" 2" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24"
Plate Thk.
tm ins.
Gasket Inside Diameter - inches
1.315 1.900 2.375 3.500 4.500 5.563 6.625 8.625 10.750 12.750 14.000 16.000 18.000 20.000 24.000
Allowable Pressures - lbs per Square Inch
0.250 6,593 3,158 2,021 931 563 368 260 153 99 70 58 45 35 29 20
0.313 10,301 4,934 3,158 1,454 880 576 406 239 154 110 91 70 55 45 31
0.375 14,833 7,105 4,547 2,094 1,267 829 584 345 222 158 131 100 79 64 45
0.438   9,671 6,189 2,850 1,724 1,128 795 469 302 215 178 136 108 87 61
0.500   12,632 8,084 3,722 2,252 1,474 1,039 613 395 281 233 178 141 114 79
0.563     10,232 4,711 2,850 1,865 1,315 776 499 355 294 225 178 144 100
0.625     12,632 5,816 3,519 2,303 1,623 958 617 438 364 278 220 178 124
0.750       8,376 5,067 3,316 2,338 1,379 888 631 523 401 317 257 178
0.875       11,400 6,869 4,513 3,182 1,877 1,208 859 713 546 431 349 242
1.000       14,890 9,007 5,895 4,153 2,452 1,578 1,122 931 713 563 456 317
1.125         11,400 7,461 5,260 3,103 1,998 1,420 1,178 902 713 557 401
1.250         14,074 9,211 6,493 3,831 2,466 1,753 1,454 1,113 880 713 495
1.375           11,145 7,857 4,636 2,984 2,121 1,759 1,347 1,064 862 599
1.500           13,264 9,351 5,517 3,551 2,525 2,094 1,603 1,267 1,026 713
1.625             10,974 6,475 4,168 2,963 2,457 1,881 1,487 1,204 836
1.750             12,727 7,509 4,834 3,436 2,850 2,182 1,724 1,397 970
2.000               9,808 6,313 4,188 3,722 2,850 2,252 1,824 1,267
Outside Diameter of Blind - inches
150# 2.625 3.375 4.125 5.375 6.875 7.750 8.750 11.000 13.375 16.125 17.750 20.250 21.625 23.875 28.250
300# 2.875 3.750 4.375 5.875 7.125 8.500 9.875 12.125 14.250 16.625 19.125 21.250 23.500 25.750 30.500

WARNING: - For Slip Blinds Only do not use for Service Blinds or End Blanks.

Allowable pressures shown in Table are based on formula 15, paragraph 304.5.3., ASME B31.3
where: - tm = dg*(3*P/(16*S*E))^.5 + C

Octagon Engineering Corp. -

dg = inside diameter of gasket. ins.
P = Allowable pressure psi.
S = Allowable stress (90% of Minimum Yield) psi.
E = 1.0
C = Corrosion Allowance (No allowance has beennmade in the above table)