MIL-PRF-62411/3A(AT)
Internal leakage. The pressure applied to the hot air passages shall be 100 psig (see 4.6.4.2).
Proof pressure. The proof pressure shall be 325 psig (2240.7 kPa)) (see 4.6.5).
Burst pressure. The burst pressure shall be 300 psig (2068 kPa) at 845 degrees Fahrenheit (°F)
(452 degrees Celsius (°C)) (see 4.6.6).
Heat transfer. Heat transfer performance shall be not less than that shown in figure 1 (see 4.6.7).
Air pressure loss. The pressure loss shall not exceed that shown in figure 2 (see 4.6.8).
Leakage.
External leakage. A pneumatic pressure of 100 to 103 psig (689 to 710 kPa) shall be applied to
the hot air passages.
Internal leakage. A pneumatic pressure of 100 to 130 psig shall be applied to the hot air
passages.
Proof pressure. The test pressure shall be 325 to 335 psig (2240.7 to 2309.7 kPa).
Burst pressure. The oven temperature shall be 845°F (452°C). The test pressure shall be 300 to
309 psig (2068 to 2130 kPa).
Heat transfer. To determine conformance to 3.5.4, the heat exchanger shall operate at each
combination of the steady state conditions specified in table VI. The measured hot air outlet
temperature shall be equal to or greater than that specified in table VI.
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