Answer / awaneesh

Flange rating basically refers to the amount of pressure
the line/flange can handle.
As per EIL standards, it is available in
150/300/450/600/900/1500/2500 psi. So dividing this figure
by 14.2 , we can get the rating in Kg/cm2.

Answer / dinesh puri

Basically, It is Pressure rating for which Flanges can
withstand at particular temperature. There are different
standards specifying Flange rating as ASME/ANSI / PN or DN
and they give the max pressure at particular temp. Flanges
can withstand.

Answer / abhilash rajan

Basically it is showing the amount of pressure it can withstand under non-shock conditions. Pressure will decrease under the temperature increases.


Maximum Allowable non-shock Pressure (psig)
Temperature
(oF) Pressure Class (lb)
150 300 400 600 900 1500 2500
Hydrostatic Test Pressure (psig)
450 1125 1500 2225 3350 5575 9275
-20 to 100 285 740 990 1480 2220 3705 6170
200 260 675 900 1350 2025 3375 5625
300 230 655 875 1315 1970 3280 5470
400 200 635 845 1270 1900 3170 5280
500 170 600 800 1200 1795 2995 4990
600 140 550 730 1095 1640 2735 4560
650 125 535 715 1075 1610 2685 4475
700 110 535 710 1065 1600 2665 4440
750 95 505 670 1010 1510 2520 4200
800 80 410 550 825 1235 2060 3430
850 65 270 355 535 805 1340 2230
900 50 170 230 345 515 860 1430
950 35 105 140 205 310 515 860
1000 20 50 70 105 155 260 430

Answer / atul

it is the capacity of flange to hold pressure at non shock
conditions

temperature of gas increases .comment on change in conductivity of gases.

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