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| Hazardous Materials Selection Criteria
The requirements for preventing or minimizing the consequences of catastrophic releases of toxic, reactive, flammable, or explosive materials that may result in toxic, fire, or explosion hazards are described in this part. The requirements apply to all of the chemicals included in, but not limited to, those specified in 29 CFR 1910.119, Process Safety Management of Highly Hazardous Chemicals. These requirements also apply to explosives and pyrotechnics as defined in 29 CFR 1910.109, Explosives and Blasting Agents.
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10.1.1. Hazardous Materials Flammability and Combustibility:
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10.1.1.1. The least flammable material shall be used.
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10.1.1.2. Materials that will not burn readily upon ignition shall be used.
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10.1.2. Hazardous Materials Toxicity:
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The NASA Material and Process Technical Information System (MAPTIS) contains material codes and ratings for materials, standard and commercial parts, and components. Material selection from this or other approved NASA material data base, for example, KTI-5212, Material Selection List for Plastic Films, Foams, and Adhesive Tapes, is recommended.
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10.1.2.1. The least toxic material shall be used.
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10.1.2.2. Material that give off a toxic gas if ignited shall not be used if it is determined in a materials assessment that the material could credibly come in contact with ignition or high heat source(s)
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10.1.3. Hazardous Materials Compatibility:
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10.1.3.1. Materials, including leakage, shall not come in contact with a non-compatible material that can cause a hazard.
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10.1.3.2. Compatibility shall be determined on a case-by-case basis.
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10.1.3.3 Non-Flight materials used in processing and testing of flight hardware shall not cause degradation of the flight hardware.
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10.1.4. Hazardous Materials Electrostatic Buildup. Hazardous materials shall not retain a static charge that presents an ignition source to ordnance or propellants or a shock hazard to personnel.
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Hazardous Materials Test Requirements |
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10.2.1. Plastic Materials Test Requirements:
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10.2.1.1. Plastic materials that may pose a hazard because of compatibility or toxicity shall be tested in accordance with the requirements described in NASA-STD-6001, Flammability, Offgassing and Compatibility Requirements and Test Procedures.
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10.2.1.2. Plastic materials that may pose a hazard because of flammability shall be tested in accordance with the requirements described in NASA-STD-6001, Flammability, Offgassing, and Compatibility Requirements and Test Procedures.
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10.2.1.3. Plastic materials that may pose a hazard because of electrostatic discharge shall be tested in accordance with the requirements described in KSC/MMA-1985-79, Standard Test Method for Evaluating Triboelectric Charge Generation and Decay.
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10.2.1.4. Plastic materials that may pose a hazard because of hypergolic propellant ignition/breakthrough shall be tested in accordance with the requirements described in KSC/MTB-175-88, Procedure for Casual Exposure of Materials to Hypergolic Fluids, Exothermic Reaction Test Method.
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10.2.1.5. The results of these tests shall be submitted to the PSWG and Range Safety for review and approval, based on use.
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10.2.2. Other Hazardous Material Test Requirements:
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10.2.2.1. Testing of materials whose hazardous properties are not well defined may be required.
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10.2.2.2. Toxicity, reactivity, compatibility, flammability and/or combustibility testing requirements shall be determined on a case-by-case basis.
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