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Parker Hannifn Corporation
Parfex Division
Ravenna, OH
Catalog Number 4200-M-2 General Technical Information
Reference: Pressure data for metal tubing is taken
from American National Standard Code for Pressure
Piping, “Power Piping, ANSI B31.1 – B30-1993A
Edition.” The values stated for operating (opr.)
pressure are the maximum internal service pressure
determined using the calculated burst pressure and
an associated design factor. The equations and
stress values were extracted from the above listed
document.
Pressure data for Parker stainless steel tubing is
derived from the relation:
Material Specifcations for Metal Tubing
Tubing Type
Tube Size
(in.) Tubing Pressure Rating (PSI) Versus Temperature
O.D. Wall
100°F 200°F 300°F 400°F 500°F 600°F
Burst Opr. Burst Opr. Burst Opr. Burst Opr. Burst Opr. Burst
Copper Type DHP,
Alloy No. 122, Soft
Annealed Bright
Seamless ASTM B68
and B75
1/4
3/8
1/2
1/2
.030
.032
.035
.049
7230
5040
4050
5900
1450
1010
810
1180
6630
4620
3710
5400
1330
930
750
1080
5730
3990
3200
4700
1150
800
640
940
3620
2520
2020
2950
730
510
410
590
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Stainless Steel, Type
316 Welded per
ASTM A-269
1/4
3/8
1/2
1/2
.035
.035
.035
.049
20100
12800
9400
13500
5025
3200
2350
3375
20100
12800
9400
13500
5025
3200
2350
3375
18200
11600
8500
12300
4550
2900
2125
3075
16900
10800
7900
11400
4225
2700
1975
2850
16300
10400
7600
10900
4075
2600
1900
2725
15900
10200
7500
10700
3975
2550
1875
2675
Stainless Steel, Type
316 Seamless per
ASTM A-269
1/4
3/8
1/2
1/2
.035
.035
.035
.049
23650
15060
11060
15880
5910
3765
2765
3970
23645
15060
11060
15880
5910
3765
2765
3970
23300
13640
10000
14480
5825
3410
2500
3620
19880
12700
9300
13420
4970
3175
2325
3355
19180
12240
8940
12820
4795
3060
2235
3205
18700
12000
8820
12580
4675
3000
2205
3145
*All values are nominal.
2st
Burst Pressure = K D-0.8t
where K = effciency of weld (0.85);
(K = 1 for seamless)
s = tensile strength of stainless steel (psi)
D = tube O.D., in inches
t = tube wall thickness in inches
The operating pressure is taken to be 25% of the
burst pressure, which is a 4 to 1 design factor.
Tubing Pressure Rating*§