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Correction Factors For Superheated Steam Acc. To ASME/API 520

This document provides correction factors for superheated steam according to ASME/API 520 standards. It contains two tables - one for US units and one for SI units - that list correction factors for different steam temperatures and set pressures to account for the effects of superheat on sizing safety valves. The correction factors decrease with increasing temperature and pressure.

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506 views1 page

Correction Factors For Superheated Steam Acc. To ASME/API 520

This document provides correction factors for superheated steam according to ASME/API 520 standards. It contains two tables - one for US units and one for SI units - that list correction factors for different steam temperatures and set pressures to account for the effects of superheat on sizing safety valves. The correction factors decrease with increasing temperature and pressure.

Uploaded by

Angga
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Correction Factors for Superheated Steam acc.

to ASME/API 520

Superheated Steam Correction Factors KSH for Sizing of Safety Valves acc. to ASME/API 520

Ansprech-
berdruck Pound/Inch-Einheiten / Pound/Inch units
Set pressure
psi g Temperatur / Temperature in F
300 400 500 600 700 800 900 1000 1100 1200
15 1.00 0.98 0.93 0.88 0.84 0.80 0.77 0.74 0.72 0.70
20 1.00 0.98 0.93 0.88 0.84 0.80 0.77 0.74 0.72 0.70
40 1.00 0.99 0.93 0.88 0.84 0.81 0.77 0.74 0.72 0.70
60 1.00 0.99 0.93 0.88 0.84 0.81 0.77 0.75 0.72 0.70
80 1.00 0.99 0.93 0.88 0.84 0.81 0.77 0.75 0.72 0.70
100 1.00 0.99 0.94 0.89 0.84 0.81 0.77 0.75 0.72 0.70
120 1.00 0.99 0.94 0.89 0.84 0.81 0.78 0.75 0.72 0.70
140 1.00 0.99 0.94 0.89 0.85 0.81 0.78 0.75 0.72 0.70
160 1.00 0.99 0.94 0.89 0.85 0.81 0.78 0.75 0.72 0.70
180 1.00 0.99 0.94 0.89 0.85 0.81 0.78 0.75 0.72 0.70
200 1.00 0.99 0.95 0.89 0.85 0.81 0.78 0.75 0.72 0.70
220 1.00 0.99 0.95 0.89 0.85 0.81 0.78 0.75 0.72 0.70
240 1.00 0.95 0.90 0.85 0.81 0.78 0.75 0.72 0.70
260 1.00 0.95 0.90 0.85 0.81 0.78 0.75 0.72 0.70
280 1.00 0.96 0.90 0.85 0.81 0.78 0.75 0.72 0.70
300 1.00 0.96 0.90 0.85 0.81 0.78 0.75 0.72 0.70
350 1.00 0.96 0.90 0.86 0.82 0.78 0.75 0.72 0.70
400 1.00 0.96 0.91 0.86 0.82 0.78 0.75 0.72 0.70
500 1.00 0.96 0.92 0.86 0.82 0.78 0.75 0.73 0.70
600 1.00 0.97 0.92 0.87 0.82 0.79 0.75 0.73 0.70
800 1.00 0.95 0.88 0.83 0.79 0.76 0.73 0.70
1000 1.00 0.96 0.89 0.84 0.79 0.76 0.73 0.71
1250 1.00 0.97 0.91 0.85 0.80 0.77 0.74 0.71
1500 1.00 0.93 0.86 0.81 0.77 0.74 0.71
1750 1.00 0.94 0.86 0.81 0.77 0.73 0.70
2000 1.00 0.95 0.86 0.80 0.76 0.72 0.69
2500 1.00 0.95 0.85 0.78 0.73 0.69 0.66
3000 1.00 0.82 0.74 0.69 0.65 0.62

Ansprech-
berdruck SI-Einheiten / SI units
Set pressure
bar/bar g Temperatur / Temperature in C
160 170 180 190 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560
1 1.00 1.00 1.00 1.00 0.99 0.97 0.95 0.93 0.91 0.89 0.88 0.86 0.85 0.83 0.82 0.81 0.80 0.79 0.77 0.76 0.75 0.74 0.73
2 1.00 1.00 1.00 1.00 0.99 0.97 0.95 0.93 0.91 0.89 0.88 0.86 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.73
3 1.00 1.00 1.00 1.00 0.99 0.97 0.95 0.93 0.91 0.90 0.88 0.86 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.73
4 1.00 1.00 1.00 1.00 0.99 0.97 0.95 0.93 0.91 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.74
5 1.00 1.00 1.00 1.00 0.99 0.98 0.95 0.93 0.92 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.74
6 1.00 1.00 1.00 0.99 0.98 0.96 0.94 0.92 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.76 0.76 0.74 0.74
7 1.00 1.00 1.00 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.80 0.79 0.78 0.77 0.76 0.75 0.74
8 1.00 1.00 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.87 0.85 0.84 0.83 0.81 0.80 0.79 0.78 0.77 0.76 0.75 0.74
10 1.00 1.00 0.99 0.96 0.94 0.92 0.90 0.89 0.87 0,85 0.84 0.83 0.81 0.80 0.79 0.78 0.77 0.76 0.75 0.74
15 1.00 0.99 0.97 0.95 0.93 0.91 0.89 0.88 0.86 0.84 0.83 0.82 0.80 0.79 0.78 0.77 0.76 0.75 0.74
20 1.00 0.98 0.96 0.94 0.91 0.90 0.88 0.86 0.85 0.83 0.82 0.80 0.79 0.78 0.77 0.76 0.75 0.74
25 0.99 0.97 0.94 0.92 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.79 0.78 0.77 0.76 0.75 0.74
30 0.99 0.98 0.95 0.93 0.90 0.89 0.87 0.85 0.84 0.82 0.81 0.79 0.78 0.77 0.76 0.75 0.74
40 0.99 0.97 0.94 0.92 0.90 0.88 0.86 0.84 0.83 0.81 0.80 0.79 0.78 0.76 0.75 0.74
50 0.98 0.95 0.93 0.91 0.88 0.87 0.85 0.83 0.82 0.80 0.79 0.78 0.77 0.76 0.75
60 0.99 0.97 0.94 0.92 0.89 0.87 0.85 0.84 0.82 0.81 0.80 0.78 0.77 0.76 0.75
70 0.98 0.95 0.94 0.90 0.88 0.86 0.84 0.83 0.81 0.80 0.79 0.77 0.76 0.75
80 0.99 0.96 0.94 0.91 0.89 0.87 0.85 0.83 0.82 0.80 0.79 0.78 0.76 0.75
100 0.99 0.97 0.94 0.91 0.88 0.86 0.85 0.83 0.81 0.80 0.78 0.77 0.76
120 0.98 0.96 0.92 0.89 0.87 0.85 0.83 0.81 0.80 0.78 0.77 0.76
140 0.99 0.96 0.93 0.90 0.87 0.85 0.82 0.81 0.79 0.77 0.76 0.75
160 0.97 0.95 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75 0.73
180 0.99 0.94 0.90 0.86 0.83 0.80 0.78 0.76 0.75 0.73 0.72
200 0.93 0.90 0.85 0.81 0.79 0.76 0.74 0.73 0.72 0.70
219 0.94 0.89 0.83 0.79 0.76 0.74 0.72 0.70 0.68 0.67

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