T9
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
4300
Catalog
General Technical
Tube Derating Factors for Temperature
Besides severity of service, high operating temperature
also reduces allowable working pressure of the tubing.
Temperaturederating factors for various tube materials are
given in Table T7. Where applicable, derating factors for
severity of service and temperature should be applied to
the design pressure values in
Tables T17
an
d T18 t
o arrive
at the maximum recommended working pressure.
Example:
Combined derating factor for 316SS tubing for B
(
severe) service and 500°F. operation is .67 x .9 = .603
Tube Selection Example:
*
The derating factors are based on allowable design stress
values at various temperatures per ASME B31.1 code for
pressure piping (1986).
Temperature
Table T6 — Temperature Ratios for Common Tube Materials
Table T7 — Temperature Derating Factors* for Tubes
T
Tube
Material
Specification Construction Condition
Max.
Hardness
Temperature
Range (7)
Carbon
Steel
C-1010
SAE J524
(
ASTM A179)
(8)
Seamless
Fully
Annealed
HRB 72
-65
° to
500
°F
-55
° to
260
°C
SAE J525
(
ASTM A178)
(8)
Welded &
Drawn
SAE J356
Welded &
Flash Con-
trolled
Carbon
Steel
C-1021
SAE J2467
Welded &
Flash Con-
trolled
Fully
Annealed
HRB 75
-65
° to
500
°F
-55
° to
260
°C
SAE J2435
Welded &
Drawn
Carbon
Steel
High
Strength
Low Alloy
(
HSLA)
SAE 2613
Welded &
Flash Con-
trolled Sub-criti-
cally
annealed
HRB 90
-65
° to
500
°F
-55
° to
260
°C
SAE J2614 Welded &
Drawn
Alloy Steel
4130
ASTM A519 Seamless
-65
° to
500
°F
-55
° to
260
°C
St 37.4
(
Carbon
Steel)
DIN 2391
Part 2
(
Metric)
Seamless
Fully
Annealed
HRB 72
-65
° to
500
°F
-55
° to
260
°C
Stainless
Steel 304 &
316
ASTM A213
ASTM A269 Seamless
Fully
Annealed
HRB 90
-425
° to
1200
°
-255
° to
650
°C
(3)
ASTM A249
ASTM A269
Welded &
Drawn
1.4571
1.4541
Stainless
Steel
DIN 17458
Tab 8
(
Metric)
Seamless
Fully
Annealed
HRB 90
-425
° to
1200
°
-255
° to
650
°C
(3)
Copper
SAE J528
(
ASTM B-75)
(8)
Seamless
Soft
Annealed
Temper 0
60
Max.
Rock-
well
15
T
-325
° to
400
°F
-200
° to
205
°C
Aluminum
6061
ASTM-B210 Seamless
T6 Temper HRB 56 -325° to
400
°F
-200
° to
205
°C
0 &
T4
Temper HRB 30
Monel 400 ASTM-B165 Seamless
Fully
Annealed HRB 70
-400
° to
800
°F
-240
° to
425
°C
Nylon
Extruded Flexible &
Semi-Rigid
-60
° to
200
°F
-50
° to 95°C
Polyethyl-
ene
ASTM
D-1248
Extruded Instrument
Grade
-80
° to
150
°F
-60
° to 65°C
PVC
Extruded
Instru-
ment &
Laboratory
Grade
0
° to 140°F
-20
° to 60°C
PFTE
Extruded
&
Cintered
-65
° to
400
°F
-55
° to
205
°C
Maximum
Operating
Temperature
Steel
C-1010
and
C-4130
Stainless
Steel
Copper Aluminum
6061-
T6
Monel
Type 4000
304 316
100
1.00 1.00 1.00 1.00
1.00
1.00
150
1.00 0.91 1.00 0.85
1.00
0.97
200
1.00 0.84 1.00 0.80
1.00
0.94
250
1.00 0.79 1.00 0.80
0.94
0.91
300
1.00 0.75 1.00 0.78
0.80
0.88
350
0.99 0.72 0.99 0.67
0.60
0.86
400
0.98 0.69 0.97 0.50
0.43
0.85
500
0.96 0.65 0.90
0.84
600
0.61 0.85
0.84
700
0.59 0.82
0.84
800
0.57 0.80
0.83
900
0.54 0.78
1000
0.52 0.77
1100
0.47 0.62
1200
0.32 0.37
Temperature Ratings For
Common Tube Materials
link