MIL-PRF-23256C
TABLE I. First article inspection.
Test
Test
Test
requirement
method
Sample 1/
paragraph
paragraph
A
B
C
D
Visual examination
3.5.1.1
4.5.1.1
1
1
1
1
Dimensional check
3.5.1.2
4.5.1.2
2
2
2
2
Proof pressure
3.5.2
4.5.2
3
3
3
3
Leakage
3.5.3
4.5.3
4
4
4
4
Operating pressure
3.5.4
4.5.4
5
5
5
5
Pressure drop
3.5.5
4.5.5
6
6
6
6
High temperature
3.5.6
4.5.6
7
X
7
X
Low temperature
3.5.7
4.5.7
8
X
8
X
Thermal shock
3.5.8
4.5.8
X
7
X
7
Salt fog
3.5.9
4.5.9
X
8
X
8
Humidity
3.5.10
4.5.10
X
9
X
9
Vibration
3.5.11
4.5.11
9
X
9
X
Shock
3.5.12
4.5.12
10
X
10
X
Service life, pressure
3.5.13
4.5.13.1
X
10
X
X
Service life, mechanical
3.5.13
4.5.13.2
X
X
X
10
Burst pressure
3.5.14
4.5.14
11
X
11
X
1/ Test sequence is denoted by the numbers in the sample columns. An X denotes test not
required.
4.3.1.2 Sampling for tests and examination. Sampling for tests and examination of seal valve
assemblies shall be on a lot by lot basis and the sample size determined by lot size as specified in
table III.
4.4 Test conditions.
4.4.1 Temperature and humidity. Unless otherwise specified in the contract, tests shall be
conducted at a room temperature of 77±18°F (25±10°C) and a relative humidity within a range
of room ambient to 95 percent.
4.4.2 Temperature stabilization. All parts of the test item shall be stabilized at the specified
temperature ±5°F (±2.8°C) indicated prior to conducting any operational tests. Unless otherwise
specified specifically herein, temperature stabilization has been attained when the indicated
temperature of the surface of the largest mass of the test item does not change more than
±5°F (±2.8°C ) in a period of one hour.
7
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