Rideshare payload user’s guide october 2022
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- 4.1.5 FULLY INTEGRATED PRESSURE SYSTEMS
- 4.1.5.1 LEAK TEST REQUIREMENT FULLY INTEGRATED PRESSURE SYSTEM LEVEL
| 4.1.4.4.2 Verification for Non-US DOT Vessels that do NOT meet the 15% Rule Customer must provide the following Either (Preferred) Static and random vibration qualification of the pressure vessel while pressurized to 1.25 times flight MEOP in flight-like mounting OR analysis report demonstrating complete flight stress coverage between unpressurized vibration/static testing and pressure-only (burst) testing. Pressure vessel qualification testing including burst, cycle testing, residual vessel strength after pressure, and structural cycle testing Acceptance testing strategy and per-vessel proof test. Document detailing test-like-you-fly deviations between test and flight including rationale for acceptance. 4.1.5 FULLY INTEGRATED PRESSURE SYSTEMS A pressure system is any system that is intended to be pressurized beyond 0.5 atmospheres. This includes both pressure vessels and pressure components like valves, fittings, and tubes that have potential to see internal pressure in the time between Customer delivery and on-orbit deployment. For all pressurized systems, the following information must be provided to SpaceX: 1. Document detailing system design criteria, MEOP derivation for flight and ground cases for all pressurized components, features and pressure vessels, including valve set points and relief device sizing. 2. System schematic using standard P&ID symbols and an (excel) tabulated parts list, including valves, reliefs, transducers, and reference designators for all parts. 3. List of all single point failures in the system. 4. Qualification and acceptance testing for each component of the pressure system and the overall system qualification strategy. 5. Document detailing combined system test-like-you-fly deviations between test and flight including rationale. 4.1.5.1 LEAK TEST REQUIREMENT FULLY INTEGRATED PRESSURE SYSTEM LEVEL The fully integrated pressure system must be leak tested demonstrating a maximum leak rate of 10 -4 sccs at MEOP. For pressure vessels that meet material compatibility requirements stated in Section 4.1.5.2, leak testing can be validated using the following method. Documentation must be submitted to SpaceX in order to evaluate conformance. All nonconforming material compatibility pressure vessels must contact their SpaceX representative for special leak test requirements. I. Pressurize fully integrated system to MEOP II. Test Fluid Helium or 90% Nitrogen Helium mix III. Coat all fittings/connections with Snoop (ask SpaceX representative to verify acceptable equivalents) IV. Deliverables: a. Closeup video of each fitting and connection individually b. Closeup video of pressure gauge (or data trace) RIDESHARE PAYLOAD USER’S GUIDE © Space Exploration Technologies Corp. All rights reserved. No US. Export Controlled Data. 26 V. Success Criteria No bubbles Pressure system tests must take proper precautions to ensure safety. Download 2.78 Mb. Share with your friends:
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