| Equation: P = (2*S*T)/((O.D.-2*T)*SF) |
| |
| Where: |
P = Fluid Pressure (psi) |
|
|
T = Pipe Wall Thickness (in) |
| O.D. = Pipe Outside Diameter (in) |
| SF = Safety factor
(General Calculations 1.5 – 10, Use 1 For Bursting Pressure) |
| S = Material
Strength (psi) |
Ultimate Tensile strength or Yield strength can be
used.
Ultimate should be used to determine the bursting
pressure.
Yield can be used for estimating pressures at which
permanent deformation begins.
1Mpa=144.55psi
According to ASTM A1016,
Hydrostatic test pressure determined by the following equation:
Inch-Pound Units: P=32000t/D
SI Units: P=220.6t/D
where:
P = hydrostatic test pressure, psi or MPa,
t = specified wall thickness, in. or mm, and
D = specified outside diameter, in. or mm.
|
Tensile Strenth value or Yield Strength value? View here: Tensile strength Yield Strength
ASTM A312 Stainless Steel Pipe Theoretical Bursting and Collapsing Pressures for Pipe
Nominal
Size
Inches |
Schedule
Number |
Outside
Diameter
Inches |
Wall
Thickness
Inches |
Inside
Diameter
Inches |
Internal
Pressure
PSI
Bursting |
External
Pressure
PSI
Collapsing |
| 1/8
|
10 |
0.405 |
0.049 |
0.307 |
18,150 |
7,468 |
| 40 |
0.405 |
0.068 |
0.269 |
25,195 |
10,761 |
| 80 |
0.405 |
0.095 |
0.215 |
35,185 |
15,441 |
| 1/4
|
10 |
0.540 |
0.065 |
0.410 |
18,055 |
7,425 |
| 40 |
0.540 |
0.088 |
0.364 |
24,444 |
10,415 |
| 80 |
0.540 |
0.119 |
0.302 |
33,055 |
14,445 |
| 3/8
|
10 |
0.678 |
0.065 |
0.545 |
14,380 |
5,705 |
| 40 |
0.678 |
0.091 |
0.493 |
20,132 |
8,397 |
| 80 |
0.678 |
0.126 |
0.423 |
27,876 |
12,021 |
| 1/2
|
5 |
0.840 |
0.065 |
0.710 |
11,607 |
4,407 |
| 10 |
0.840 |
0.083 |
0.674 |
14,821 |
5,911 |
| 40 |
0.840 |
0.109 |
0.622 |
19,464 |
8,084 |
| 80 |
0.840 |
0.147 |
0.546 |
26,250 |
11,260 |
| 3/4
|
5 |
1.050 |
0.065 |
0.920 |
9,285 |
3,295 |
| 10 |
1.050 |
0.083 |
0.884 |
11,857 |
4,524 |
| 40 |
1.050 |
0.113 |
0.824 |
16,142 |
6,529 |
| 80 |
1.050 |
0.154 |
0.742 |
22,000 |
9,271 |
| 1
|
5 |
1.315 |
0.065 |
1.185 |
7,414 |
2,445 |
| 10 |
1.315 |
0.109 |
1.097 |
12,433 |
3,795 |
| 40 |
1.315 |
0.133 |
1.049 |
15,171 |
6,075 |
| 80 |
1.315 |
0.179 |
0.957 |
20,418 |
8,530 |
| 1-1/4
|
5 |
1.660 |
0.065 |
1.530 |
5,873 |
1,725 |
| 10 |
1.660 |
0.109 |
1.442 |
9,849 |
3,585 |
| 40 |
1.660 |
0.140 |
1.380 |
12,650 |
3,895 |
| 80 |
1.660 |
0.191 |
1.278 |
17,259 |
7,052 |
| 1-1/2
|
5 |
1.900 |
0.065 |
1.770 |
5,131 |
1,376 |
| 10 |
1.900 |
0.109 |
1.682 |
8,605 |
3,002 |
| 40 |
1.900 |
0.145 |
1.610 |
11,447 |
4,332 |
| 80 |
1.900 |
0.200 |
1.500 |
15,789 |
6,364 |
| 2
|
5 |
2.375 |
0.065 |
2.245 |
4,105 |
896 |
| 10 |
2.375 |
0.109 |
2.157 |
6,884 |
2,196 |
| 40 |
2.375 |
0.154 |
2.067 |
9,726 |
3,526 |
| 80 |
2.375 |
0.218 |
1.939 |
13,768 |
5,418 |
| 2-1/2
|
5 |
2.875 |
0.083 |
2.709 |
4,330 |
1,001 |
| 10 |
2.875 |
0.120 |
2.635 |
6,260 |
1,905 |
| 40 |
2.875 |
0.203 |
2.469 |
10,591 |
3,931 |
| 3
|
5 |
3.500 |
0.083 |
3.334 |
3,557 |
639 |
| 10 |
3.500 |
0.120 |
3.260 |
5,142 |
1,375 |
| 40 |
3.500 |
0.216 |
3.068 |
9,257 |
3,307 |
| 3-1/2
|
5 |
4.000 |
0.083 |
3.834 |
3,112 |
431 |
| 10 |
4.000 |
0.120 |
3.760 |
4,500 |
1,081 |
| 4
|
5 |
4.500 |
0.083 |
4.334 |
2,766 |
315 |
| 10 |
4.500 |
0.120 |
4.260 |
4,000 |
845 |
| 40 |
4.500 |
0.237 |
5.345 |
7,900 |
2,672 |
| 5
|
5 |
5.563 |
0.109 |
5.295 |
2,949 |
350 |
| 10 |
5.563 |
0.134 |
6.407 |
3,613 |
665 |
| 6
|
5 |
6.625 |
0.109 |
6.357
|
2,467 |
129 |
| 10 |
6.625 |
0.134 |
3,033 |
394 |
| NOTE: To compute safe working pressures, above burst pressures should be divided by your desired safety factor. |
|
