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PRESSURE RATING TABLES

Adaptor Pressure Ratings Applicable to Bore Size Only

Nominal Bore Dia. Design Working Pressure Proof Pressure Over Pressure
  mm ins   BAR psi   BAR psi   BAR psi  
  5 1/8   350 5145   525 7718   1400 20580  
  6.3 1/4   450 6500   675 9750   1520 22000  
  10 3/8   380 5500   570 8250   1310 19000  
  12.5 1/2   310 4500   465 6750   1100 16000  
  14.25 9/16   289 4250   434 6375   964 14170  
  16 5/8   280 4000   420 6000   850 12350  
  19 3/4   240 3500   360 5250   750 11000  
  25 1   210 3000   315 4500   675 9750  
  31.5 1-1/4   170 2500   255 3750   430 7700  
  37.5 1-1/2   136 2000   204 3000   404 5940  
  50 2   136 2000   204 3000   404 5940  
  62.5 2-1/2   84 1240   126 1860   245 3596  
  75 3   76 1120   114 1680   216 3170  

Tube Pressure Ratings Applicable to SWEPTS Only - Not Applicable to
PUSH-IN SWEPTS

Outer Dia. Of Tube Design Working Pressure Proof Pressure Over Pressure
  mm ins   BAR psi   BAR psi   BAR psi  
  4.7 3/16   303.4 4400   455 6600   910 13200  
  6.3 1/4   391 5570   586 8500   1173 17000  
  10 3./8   303.4 4400   455 6600   910 13200  
  12.5 1/2   261 3790   392 5685   784 11370  
  16 5/8   209 3030   313 4545   626 9090  
  19 3/4   216.75 3140   324 4710   649 9420  
  25 1   211.65 3070   317 4600   634 9200  
  31.5 1-1/4   188.7 2735   282 4100   565 8200  
  37.5 1-1/2   173 2515   260 3770   520 7545  
  50 2   130 1885   195 2830   390 5655  

Design Working Pressure - Recommended pressure rating for adaptors manufactured by Burnett & Hillman
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