23 July 2003
CATEGORIZATION OF SCOPE OF CERTIFICATION MATERIALS AND COMPONENTS
This appendix contains guidance for categorizing materials and
components within the Scope of Certification (SOC).
Categorization of a material or component is dependent upon its
application and service experience. The proposed application,
(configuration, joining techniques, etc.,) must be reviewed to
determine the proper categorization for each material or
For the purpose of system certification, materials and components
are grouped into three categories:
Materials and components for which considerable
operating experience in pressure vessel applications
Materials and components which are commonly used in
a variety of military and commercial applications,
but with little or no past experience for the
proposed unmanned pressure test facility application.
Generally, Category 2 material requires testing to
verify that it will be acceptable for its intended
use in the new application.
Materials and components that may be developmental,
or do not have a documented history of satisfactory
use in pressure vessel applications.
These material and component categories are not to be confused
with the hazard level categories of MIL-STD-882 and as defined in
Section 2. Solely as an aid in assessing the reliability of
materials and components in specific unmanned pressure test
facility applications, the material and component categories
described above were conceived. The applicant must justify the
materials and their applications as used in the design of the
pressure vessel system for the expected service environments.
All materials considered to be within the SOC should be
identified. Their relative location in the system should be
intended environment and with each other should be analyzed.