MIL-PRF-27407D
This specification is approved for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification covers the requirements for two grades and two types of helium.
1.2 Classification. The helium will be of the following types and grades as specified (see 6.2).
1.2.1 Types. The types of helium are as follows:
Type I
-
Gaseous
Type II
-
Liquid
1.2.2 Grades (Type I only). The grades of helium are as follows:
Grade A
-
Pressurizing
Grade B
-
Respirable
1.3 Part or identifying number (PIN). The PINs to be used for helium acquired to this
specification are created as follows:
M
27407 - X
X
Example of PIN: M27407-1B
Grade (see 1.2.2).
Type (see 1.2.1). Use 1 for Type I, 2 for Type II.
Specification number.
Prefix for military specification.
2.
APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3 and 4 of this
specification. This section does not include documents cited in other sections of this specification or
recommended for additional information or as examples. While every effort has been made to ensure the
completeness of this list, document users are cautioned that they must meet all specified requirements of
documents cited in sections 3 and 4 of this specification, whether or not they are listed.
2.2 Government documents.
2.2.1 Specifications, standards, and handbooks. The following specifications, standards and
handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the
issues of these documents are those cited in the solicitation or contract.
DEPARTMENT OF DEFENSE STANDARDS
MIL-STD-101
Color Code for Pipelines and for Compressed Gas Cylinders
MIL-STD-1411
Inspection and Maintenance of Compressed Gas Cylinders
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