Calculating of Heater Tube Thickness
according to API standard 530
Attention!
This calculation is only a simplified estimation and does not replace a detailed design calculation.
Input data
ASTM steel material
A 53 grade B (medium-carbon, seamless)
A 106 grade B (medium-carbon)
A 161 (low-carbon)
A 161 T1 (C-½Mo)
A 192 (low-carbon)
A 200 T11 (1¼Cr-½Mo)
A 200 T22 (2¼Cr-1Mo)
A 200 T9 (9Cr-1Mo)
A 200 T91 (9Cr-1Mo-V)
A 209 T1 (C-½Mo)
A 210 grade A-1 (medium-carbon)
A 213 T11 (1¼Cr-½Mo)
A 213 T22 (2¼Cr-1Mo)
A 213 T9 (9Cr-1Mo)
A 213 T91 (9Cr-1Mo-V)
A 213 type 304 (18Cr-8Ni)
A 213 type 304H (18Cr-8Ni)
A 213 type 316 (16Cr-12Ni-2Mo)
A 213 type 321 (18C-10Ni-Ti)
A 213 type 321H (18Cr-10Ni-Ti)
A 213 type 347 (18C-10Ni-Nb)
A 213 type 347H (18C-10Ni-Nb)
A 271 type 304 (18Cr-8Ni)
A 271 type 304H (18Cr-8Ni)
A 271 type 316 (16Cr-12Ni-2Mo)
A 271 type 321 (18C-10Ni-Ti)
A 271 type 321H (18Cr-10Ni-Ti)
A 271 type 347 (18C-10Ni-Nb)
A 271 type 347H (18C-10Ni-Nb)
A 312 type 304 (18Cr-8Ni)
A 312 type 304H (18Cr-8Ni)
A 312 type 316 (16Cr-12Ni-2Mo)
A 312 type 316H (16Cr-12Ni-2Mo)
A 312 type 321 (18C-10Ni-Ti)
A 312 type 321H (18Cr-10Ni-Ti)
A 312 type 347 (18C-10Ni-Nb)
A 312 type 347H (18C-10Ni-Nb)
A 335 P1 (C-½Mo)
A 335 P11 (1¼Cr-½Mo)
A 335 P22 (2¼Cr-1Mo)
A 335 P9 (9Cr-1Mo)
A 335 P91 (9Cr-1Mo-V)
A 376 type 304 (18Cr-8Ni)
A 376 type 304H (18Cr-8Ni)
A 376 type 316 (16Cr-12Ni-2Mo)
A 376 type 316H (16Cr-12Ni-2Mo)
A 376 type 321 (18C-10Ni-Ti)
A 376 type 321H (18Cr-10Ni-Ti)
A 376 type 347 (18C-10Ni-Nb)
A 376 type 347H (18C-10Ni-Nb)
A 608 HK40 (25Cr-20Ni)
B 407 N08810 (Ni-Fe-Cr)
B 407 N08811 (Ni-Fe-Cr)
User defined allowble stress
User defined allowble stress
S
m
N/mm²
Tube outside diameter
D
o
mm
Corrosion allowance
δ
CA
mm
Design life
t
DL
20 000
40 000
60 000
100 000
h
Design pressure
p
bar
Temperature at start of run
T
sor
°C
Temperature at end of run
T
eor
°C
Calculate
Results
Temperature fraction
f
T
Corrosion fraction
f
corr
Required wall thickness
δ
min
mm
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