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BS ISO 24638:2021 – TC

BS ISO 24638:2021 – TC

$217.84

Tracked Changes. Space systems. Pressure components and pressure system integration

Published By Publication Date Number of Pages
BSI 2021 80
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This document establishes the baseline requirements for the design, fabrication and testing of space flight pressure components. It also establishes the requirements for the assembly, installation, test, inspection, operation and maintenance of the pressure systems in spacecraft and launch vehicles. These requirements, when implemented on a particular space system, ensure a high level of confidence in achieving safe and reliable operation.

This document applies to all pressure components other than pressure vessels and pressurized structures in a pressure system. It covers lines, fittings, valves, bellows, hoses and other appropriate components that are integrated to form a pressure system.

The requirements for pressure vessels and pressurized structures are set forth in ISO 14623.

This document does not apply to engine components.

PDF Catalog

PDF Pages PDF Title
44 National foreword
50 Foreword
51 Introduction
53 1 Scope
2 Normative references
3 Terms and definitions
57 4 Abbreviated terms
5 General requirements
5.1 General
58 5.2 Design requirements
5.2.1 Loads, pressures and environments
5.2.2 Strength
5.2.3 Stiffness
59 5.2.4 Thermal effects
5.2.5 Stress analysis
5.2.6 Fatigue analysis/damage tolerance (safe-life) analysis
5.2.7 Analysis of survivability against space debris and meteoroid impacts
5.2.8 Avoidance of accidental break-up caused by an on-board source of energy
60 5.3 Material requirements
5.3.1 Metallic materials
5.3.2 Non-metallic material requirements
5.4 Fabrication and process requirements
61 5.5 Contamination control and cleanliness requirements
5.5.1 General contamination control requirements
5.5.2 Design considerations
62 5.6 Quality assurance programme requirements
5.6.1 General
5.6.2 QA programme inspection plan requirements
5.6.3 QA inspection technique requirements
5.6.4 QA inspection data requirements
5.6.5 Acceptance test requirements
63 5.7 Qualification test requirements
5.8 Operation and maintenance requirements
5.8.1 Operating procedure
5.8.2 Safe operating limits
64 5.8.3 Inspection and maintenance
5.8.4 Repair and refurbishment
5.8.5 Storage
5.8.6 Documentation
65 5.8.7 Reactivation
5.8.8 Recertification
6 General pressurized-system requirements
6.1 System analysis requirements
6.1.1 System pressure analysis
6.1.2 System functional analysis
66 6.1.3 System hazard analysis
6.2 Design features
6.2.1 Assembly
6.2.2 Routing
6.2.3 Separation
6.2.4 Shielding
67 6.2.5 Grounding
6.2.6 Handling
6.2.7 Special tools
6.2.8 Test points
6.2.9 Common-plug test connectors
6.2.10 Individual test connectors
6.2.11 Threaded parts
6.2.12 Friction-type locking devices
6.2.13 Internally threaded bosses
6.2.14 Retainer or snap rings
6.2.15 Snubbers
68 6.3 Component selection
6.3.1 Connections
6.3.2 Fluid temperature
6.3.3 Actuator pressure rating
6.3.4 Pressure rating
6.3.5 Pump selection
6.3.6 Fracture and leakage
6.3.7 Oxygen system components
6.3.8 Pressure regulators
6.3.9 Manual valves and regulators
69 6.4 Design pressures
6.4.1 Overpressure or underpressure
6.4.2 Back-pressure
6.4.3 Pressure isolation
6.4.4 Gas/fluid separation
6.4.5 Compressed-gas bleeding
6.5 Mechanical-environment design
6.5.1 Acceleration and shock loads
6.5.2 Torque loads
6.5.3 Vibration loads
6.6 Controls
6.6.1 Interlocks
70 6.6.2 Multiple safety-critical functions
6.6.3 Critical flows and pressures
6.7 Protection
6.8 Electrical
6.8.1 Hazardous atmospheres
6.8.2 Radio frequency energy
6.8.3 Grounding
6.8.4 Solenoids
6.8.5 Electric motor-driven pumps
6.9 Pressure relief
6.9.1 General requirements
71 6.9.2 Flow capacity
6.9.3 Sizing
6.9.4 Unmanned flight vehicle servicing
6.9.5 Automatic relief
6.9.6 Venting
6.9.7 Relief valve isolation
6.9.8 Negative-pressure protection
72 6.9.9 Reservoir pressure relief
6.9.10 Air pressure control
6.10 Control devices
6.10.1 Directional control valves
6.10.2 Overtravel
6.10.3 Pressure and volume control stops
6.10.4 Manually operated levers
6.11 Accumulators
6.11.1 Accumulator design
73 6.11.2 Accumulator gas pressure gauges
6.11.3 Accumulator identification
6.12 Flexible hose
6.12.1 Installation
6.12.2 Restraining devices
6.12.3 Flexible hose stress
6.12.4 Temporary installations
7 Specific pressure system requirements
7.1 General
74 7.2 Hydraulic systems
7.2.1 Hydraulic system components
75 7.2.2 Pressure limit
7.2.3 Cavitations
7.2.4 Hydraulic lockup
7.2.5 Pressure relief
76 7.3 Pneumatic-system requirements
7.3.1 Pneumatic-system components
7.3.2 Controls
77 Annex A (informative) Recommended minimum safety factors
78 Annex B (informative) Open line force calculation factors
79 Bibliography

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BS ISO 24638:2021 - TC
$217.84