ISO 15859-8:2004

Overview

ISO 15859-8:2004 - Space systems - Fluid characteristics, sampling and test methods - Part 8: Kerosine propellant - defines composition limits, sampling procedures and laboratory test methods for kerosine fuels used with launch vehicles, spacecraft and ground support equipment. The standard supports fuel acceptance, interface verification and contamination control by specifying purity limits, physical/chemical properties, permitted additives and the required sampling and testing regime.

Key topics and technical requirements

• Composition limits (representative):
  • Existent gum ≤ 7 mg/100 ml; Potential gum (16 h) ≤ 14 mg/100 ml
  • Total sulfur ≤ 0.05% mass fraction; Mercaptan-sulfur ≤ 0.005% (may be waived if fuel is “sweet”)
  • Aromatics ≤ 5.0% vol; Olefins ≤ 2.0% vol; Particulate matter ≤ 1.5 mg/L
• Physical properties (representative):
  • Specific gravity ~ 0.801–0.815; Freezing point ≤ −37.8 °C
  • Net heat of combustion ≥ 43.031 MJ/kg; Distillation end point ≤ 274 °C; Flash point ≥ 43.3 °C
  • Viscosity limit and smoke point requirements reported in the standard
• Additives: Allowed antioxidants, metal deactivators and dyes with maximum concentrations (e.g., antioxidants up to 9 g per 375 L).
• Water reaction: Fuel must separate sharply from water with negligible volume change between layers.
• Sampling & test plan requirements: The standard requires an approved sampling plan covering sampling points, procedures, frequency (default annual unless agreed), sample size/number, responsibilities and storage container rules (e.g., do not refill after sampling).
• Analytical methods: Distillation, hydrometer for specific gravity, jet evaporation/potential residue for gum, lamp/titrimetric or turbidimetric sulfur methods, ISO 3012 potentiometric method for mercaptans, bomb calorimeter for thermal value, viscometry, freezing point tests and others.

Applications and users

ISO 15859-8:2004 is intended for:

• Launch service providers and spaceport operators (fuel acceptance at vehicle interface)
• Propellant suppliers and storage facility operators (procurement and quality control)
• Spacecraft integrators and ground support equipment engineers (interface compatibility)
• Accredited test laboratories and quality managers (verification and reporting)
• Regulatory and safety officers (handling, storage and sampling safety)

Typical uses include fuel procurement specifications, pre-launch fuel acceptance testing, supplier audits, contamination investigations and qualification of ground support transfer systems.

Related standards

• Other parts of the ISO 15859 series (Parts 1–13) covering oxygen, hydrogen, hydrazine, nitrogen tetroxide, water, breathing air, etc.
• Referenced methods: ISO 3012 (mercaptan-sulfur potentiometric) and ISO 3014 (smoke point) and ISO 9000 for quality vocabulary.

Keywords: ISO 15859-8:2004, kerosine propellant, space systems, sampling and test methods, propellant quality, fuel verification, launch vehicle fuel.