MIL-PRF-27401G
3.4 Filled containers (Type I only).
3.4.1 Pressure. The container filling pressure (see 6.2) shall not differ from that required by the
contract by more than 1.0% at 21°C (70°F) when tested as specified in 4.5.1. In no case shall the filling
pressure exceed the rated service pressure of the container.
3.4.2 Leakage. Containers shall not leak when tested according to 4.5.2.
3.4.3 Inspection and maintenance. Compressed gas cylinders shall be inspected, maintained,
and charged according to 4.5.3.
4.
VERIFICATION
4.1 Points of inspection (see 6.2).
4.1.1 Containers. Unless otherwise specified, acceptance tests shall be conducted at the site of
filling prior to shipment or departure.
4.1.2 Pipeline. When Type I nitrogen is delivered in pipeline, acceptance tests shall be
conducted immediately prior to entering the user's system.
4.2 Conformance inspection. Quality conformance tests shall consist of the following:
a. Individual tests (Type I only) ................................ 4.2.1
b. Sampling tests .................................................... 4.2.2
4.2.1 Individual tests (Type I only). Each container shall be subjected to the following tests as
described under 4.5:
a. Filling pressure .................................................... 4.5.1
b. Leakage .............................................................. 4.5.2
4.2.2 Sampling test. The number of nitrogen containers shall be selected in accordance with
Table II and subjected to the tests required by Table I.
TABLE II. Sampling for test.
Number of containers in lot
Number of containers to be sampled
1
1
2 40
2
41 70
3
71 over
4
5
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