1. PURPOSE
1.1 This engineering guideline provides an overview of the Materials for Oxidizer Service Engineering Standard (MOSES) spreadsheet and describes how to use the spreadsheet to determine a material’s suitability for a particular application.
1.2 This guideline tabulates materials evaluated by Oxidizer Safety Committee (OSC) for oxidizer service within Air Products. This guideline lists materials that have been approved for specific applications, and it strictly delimits such service with regard to the specific application, pressure, temperature, oxidizer concentration, and phase. This guideline does not generally list materials that are not approved for oxidizer service, except in very specific situations in which the OSC has withheld approvals from materials: That are used by others (outside of Air Products). That are marketed for oxidizer service but do not meet Air Products’ performance preferences. That are marketed in a way that would lead to confusion about their use in oxidizer service.
1.3 This guideline is not comprehensive with regard to materials used in oxidizer service within Air Products. Many more materials have been historically used in oxidizer service, and their absence from this guideline does not imply unacceptability. Materials are listed in this guideline as the result of an OSC review that was specifically requested by a user, relative to a specific application. The absence of a material or the absence of an approval for a specific application typically means that either the material has not been reviewed, or that the material has not been rated among the most compatible of practical materials, by the OSC.
2. scope
2.1 This policy applies to all facilities within which oxidizer-related activities occur. The principal reactive oxidizers are oxygen, ozone, fluorine, nitrogen trifluoride, and nitrous oxide.
3. DEFINITIONS
3.1 Following are definitions for key terms used within MOSES.
3.1.1 Caution alerts the user that there are issues associated with the material that must be considered before its use. This is generally applied to approved materials that are easily confused with other materials having similar names or reputations but that are not approved for oxidizer service. Materials that are marked “Caution” are highlighted yellow.
3.1.2 Stop applies to materials that are not approved for use in most applications. Generally, these materials are comparatively flammable or have other features (such as being friable) that would tend to exclude them from use in nearly every application except those of very low consequence. In some cases, this is applied to materials that are marketed for oxidizer service and that might have passed the tests of other groups but did not meet Air Products’ standards. Materials that are not approved or marked “Stop” are highlighted red.
3.1.3 Approval Source is usually indicated as either “Minutes XX-YY” or “Day/Month/Year Meeting.” Further information is available from the OSC.
4. ORGANIZATION AND USE OF MOSES
4.1 Organization: MOSES is comprised of this application guideline and attached spreadsheet.
4.1.1 Application Guideline 3ES30600
4.2 The spreadsheet contained in this standard will be owned and maintained by the OSC.
4.2.1 The OSC must validate software, if required, to maintain ISO9000 certifications.
4.3 Searching for a particular material
4.3.1 Filtering: Columns B, C, and D have drop down menus to filter the data. For best results start with column “C” and proceed to filter using columns “D: and “B,” if needed.
4.3.2 Searching: To search for a specific item, click on EDIT, then FIND, and then enter the item to find.