Specification Requirements
Reference / Note
Operating Pressure 250.0 psid N/A °F 17.2 bar N/A °C
Proof Pressure 312.5 psid N/A °F 21.5 bar N/A °C
Proof Cycle 312.5 psid N/A °F 21.5 bar N/A °C 24 cycles
MEOP Cycle 250.0 psid N/A °F 17.2 bar N/A °C 25 cycles minimum
Design Burst Pressure 375.0 psid 92 °F 25.9 bar 33.3 °C
Total Tank Volume 103,700 in3 N/A °F 1,700.0 liters N/A °C
Required Propellant Volume N/A in3 N/A °F N/A liters N/A °C 20 to 96% fill fraction
Maximum Mass 130 lb 59.09 kg
Propellant Tube Diameter 0.375 inch 9.525 mm
Pressurant Tube Diameter 0.375 inch 9.525 mm
Frequency - lateral* > 20 Hz When immersed in propellant
Frequency - axial* > 100 Hz When immersed in propellant
Test
Test
SIZE: 1250.95 mm ID x 1836.17 mm length
Loaded Tank Sine Vibration - Acceptance (Wet)
3.46
3.46
* Allowance made for 1g gravitational
2
Ramp Down
1
52 - 100
2.6
Lateral (X or Y)
3.86
3.86
2.31
2.31
7.6*
7.6*
Ramp Down
Fluid: Loaded with 1670 kg of distilled water.
Protoflight
Axis
0.19 in. S.A
3.86
2.31
1.54
2
7.6*
5 - 13
13 - 17
17 - 45
Acceleration (g,0-peak)
Limit Acceleration(g)
5
3
2
0.2 in. S.A
10.2*
Ramp Down
5
5
3
3
10.2*
10.2*
10.2*
4.5
2.6
Ramp Down
1.3
0.25 in. S.A.
VISIT US ON OUR WEBSITE @ WWW.PSI-PCI.COM
Updated August 2011
Imperial Units
Ref. Temp.
Metric Units
Ref. Temp
Loaded Tank Sine Vibration-Qualification/Protoflight (Wet)
Axial(Z)
5 - 13
26 - 50
P/N 80517-1
SIZE: 49.25'' in ID x 72.29'' in length
The tank assembly is a hemispherical pressure vessel of all welded construction. It is mounted by 32 circumferential tabs with nut plates located on one of
the hemispheres near the girth weld joint. The tank contains an internally-mounted propellant management device (PMD), with perforated sheet and woven
screen, fabricated to maintain speration of liquid propellant and gaseous pressurant, and to provide predictable gas-free liquid propellant expulsion from the
tank under low or zero gravity conditions. The PMD has been designed to allow horizontal handling with low fill fractions. The PMD has also been modified
by the addition of a slosh control device to allow multiple erection and de-erection cycles. The propellant and pressurant ports are 3/8 inch titanium-to-304
CRES transition tubes.
Acceptance
Axial (Z)
Frequency
Acceleration(g, 0 -Peak)
Limit Acceleration (g)
4.5
13 - 17
17 - 45
45 - 100
5.0 - 22.3
22.3 - 24
24 - 26
50 - 52
52 - 100
26 - 30
50 - 52
45 - 100
5.0 - 22.3
22.3 - 24
24 - 26
0.13 in. S.A
7.6*
Lateral (X or Y)
Axis
Frequency
Test
Axis
90 to 100
100 to 800
800 to 2000
Unloaded Tank Sine Vibration - Qualification and Protoflight
Loaded Tank Water: Random Vibration Level
Acceptance (Reference only
- - test not required)
Protoflight and Qualification
Frequency
0.25 in. S.A
3
1.5
1
Sweep Rate: 2 octaves/min Qualification
4 octaves/min Protoflight and Acceptance
Qualification
All (X,Y,Z)
3.0 Minutes/Axis, Qualification
+30 dB/OCT
0.054 g
2/hz
-3 dB/Oct
+30 dB/OCT
0.027 g
2/hz
-3 dB/Oct
OVERALL (g
rms)
8.7
6.2
Loaded with 1670 kg of water and pressurized to MEOP
Duration:
1.0 Minute/Axis, Acceptance and Protoflight
Frequency (Hz)
Acceleration (g, 0-Peak)
5.0 - 10.8
10.8 - 20
20.0 - 100
100.0 - 400
Vibration test plot
ACCEPTANCE TESTS
Examination of Product N/A
Weight Determination N/A
Pre-Proof Volume Determination N/A
Proof Pressure Test N/A
Post-Proof Volume Determination N/A
Expulsion Efficiency N/A
PMD Bubble Point Test Propietary N/A
External Leakage Test <1x10-6 std/cc N/A
Penetrant Inspection N/A
Radiographic Inspection N/A
Final Examination of Product N/A
Cleanliness Verfication N/A
QUALIFICATION TESTS
Examination of Product Pass
Weight Determination 130 111.52
Pre-Proof Volume Determination 103700 104192
Proof Pressure Test 312.5 320
Post-Proof Volume Determination 104344 105188
Proof Pressure Cycle Test 312.5 320
MEOP Pressure Cycle Test 250 252
Expulsion Efficiency > 99.5 99
Vibration Test
PMD Bubble Point Test Proprietary Propietary
External Leakage Test 1x10-6 3.6x10-8
Penetrant Inspection Pass
Radiographic Inspection Pass
Final Examination of Product Pass
Cleanliness Verfication Pass
Burst Pressure Test 375 519
Natural Frequency Required min frequency X-Axis Y-Axis (lateral) Z-Axis (axial) Axis Frequency(Hz) 90 - 100 100 - 800 800 - 2000 Overall G-rms Axis Levels + 30 dB/Octave .054 G2/Hz -3dB/Octave 8.7
Prior to and after the full level random vibration test a 1/4 g sine survey shall be performed from 5 Hz to 2000 Hz at 4 octaves per minute with a 3 g limit in the lateral axis and a 4.5 g limit in the
axial axis.
*Qualification Sine Vibration Levels (Wet)
Lateral (Y)
See below for more details* Acceptance Test not
available as of 08/11/2011
*Qualification Sine Vibration Levels (Dry)
Fluid: 3682 lb of Water or Nitrogen Gas @ 250 psig and ~ 64 deg. F*Qualification Vibration Test Charts
> 35 Hz > 35 Hz > 55 Hz ~ 47 Hz
*Qualification Random Vibration Levels
Axial (Z) Frequency (Hz) 5 - 13 13 - 17 17 - 45 45 - 100 Acceleration (G) (0-Peak) .25 inch SA 5.0 3.0 2.0 5 - 22.3 22.3 - 24 24 - 26 26 - 50 50 - 52 52 - 100 .20 inch SA 10.2 Ramp Down 2.6 Ramp Down 1.3 Y & Z Frequency (Hz) 5 - 10.8 10.8 - 20 20 - 100 100 - 400 Acceleration(G) (0-PEAK) .25 inch SA 3.0 1.5 1.0 lb actual in3, record actual 56-000263 56-000263 psig,record rupture Record actual Actual Test Data: Serial No. XXX
Pass/fail ~ 47 Hz ~ 61 Hz Pass required Record required Pass required Pass required Pass required 56-000265 56-000266 std/cc He max in3, record required lb maximum in3, record required
psig, record required 56-000269 Record required
psig, record required
%, record required 56-000267 Reference Document 56-000263 Reference Document Record required Pass required lb maximum in3, record required Pass/fail psig, record required
in3, record required %, record required Record required Record required
psig, record actual in3, record actual %, record actual
Pass required Pass required
psig, record required psig, record required
psig, 24 cycles psig, 100 cycles 56-000263
56-000263
56-000268
Actual Test Data: SN 0001Q Pass/fail
lbs actual in3, record actual psig, record actual in3, record actual %, record actual Record actual Pass required Record actual Record actual Pass/fail Pass/fail
std/cc He, record actual Pass/fail Pass/fail Pass/fail Record actual 56-000263 56-000263 56-000263 56-000263 56-000264
