FED-STD-791D Federal Standard - Test Method for Lubricants, Liquid Fuels, and Related Products

The standard "FED-STD-791D Federal Standard - Test Method for Lubricants, Liquid Fuels, and Related Products" describes standard test methods for sampling, examination, and testing of lubricants, liquid fuels, and related products. This standard was developed in the United States under the Federal Property and Management Services Act of 1949, and its application to the procurement of the commodities specified herein is mandatory for all federal agencies.

The test methods described in this standard, when referenced by another standard, are an integral part of that standard.

Some test methods are the same as those published by the American Society for Testing and Materials (ASTM). These methods are listed with their corresponding ASTM method numbers, and details of such test methods are omitted from this standard.

The test methods defined in the FED-STD-791D standard are:

• 103.6 Color of gasoline
• 202.1 Low temperature cloud density
• 203.1 Casting stability at low temperature
• 204.1 Diluted casting point
• 313.3 Penetration of lubricating greases after long-term operation
• 321.3 Separation of oil from lubricating greases (static technique)
• 335.3 Gear wear
• 339.6 Diesel engine lubricating oils in difficult conditions
• 347.3 Performance of diesel engine lubricating oils under severe operating conditions
• 350.2 Evaporation loss of lubricating greases and oils (high temperature)
• 352.1 Effect of evaporation on flammability
• 353.1 Evaporation
• 354.1 Performance of lubricating oils in a two-stroke diesel engine under cyclic, turbo-supercharged conditions
• 355 Performance of lubricating oils in a two-stroke diesel engine under cyclic, turbo-supercharged conditions
• 361.4 Stroke characteristics of hydraulic brake fluids
• 500.1 Tendencies of motor gasoline for induction system deposits (ISD)
• 550.1 Tendencies of petroleum fuels to emulsify by multiple contact extractions
• 1110.2 Exit speed
• 1151.2 Explosive vapors in boiler fuel oil
• 1303.2 Drive point (refrigerant compressor oil)
• 2508.1 Thermal stability of lubricating and hydraulic fluids
• 3005.4 Dirt content of grease
• 3006.3 Contamination in engine oil
• 3007.2 Water displacement and water stability
• 3009.3 Solid particle contamination in hydraulic fluids
• 3010.1 Solid particle contamination in aircraft turbine engine oils (gravimetric procedure)
• 3011.1 Particle contamination of aviation hydraulic fluid using a particle counter
• 3012 Determination of particulate matter in aviation hydraulic fluids
• 3013 Determination of particulate contamination in synthetic turbine engine lubricants
• 3110.1 Oil in cutting oils by infrared spectrophotometry
• 3180.2 Sulfur in cutting fluids (active and total)
• 3201.7 Emulsion (petroleum and petroleum-like products)
• 3205.3 Emulsion (soluble cutting oils)
• 3213.1 Foaming properties of aircraft turbine lubricating oils (static foam test)
• 3214.1 Foaming properties of aircraft turbine lubricating oils (dynamic foam test)
• 3289.1 Total solids in water for aircraft injection system
• 3403.2 Compatibility of turbine lubricating oils
• 3407.2 Oxidation and thermal stability of aircraft engine lubricating oils (CLR engine)
• 3410.1 High temperature deposits of aviation turbine oil and degradation properties of oils
• 3411.1 Thermal stability and corrosion of aircraft turbine engine oils
• 3430.2 Universal gear lubricants
• 3432.1 Compatibility of elastomers with aircraft turbine lubricants
• 3433 Compatibility of synthetic aircraft turbine lubricants with silicone rubber
• 3440.1 Storage volatility characteristics of universal gear lubricants
• 3450 Bearing deposits of aviation turbine engine lubricants
• 3451.4 Stability of lubricating oils (working factor)
• 3452.2 Bearing compatibility of turbine oils
• 3456.2 Channeling properties of lubricants
• 3457.2 Hydrolytic stability
• 3458.1 Low temperature stability test for oil
• 3459.1 Low temperature stability
• 3463.2 Stability of grease in hot water (immersion)
• 3465.1 Storage stability testing for liquids and lubricants
• 3465.1 Storage stability testing for liquids and lubricants
• 3467.1 Storage stability of lubricating grease
• 3470.1 Homogeneity and miscibility of oils
• 3472 Sonic shear stability of polymer containing oils
• 3480.1 Volatility of blended oils
• 3500.1 Monobasic acid components of synthetic ester lubricants by gas chromatography
• 3603.5 Fluidity of synthetic rubbers
• 3604.2 Swelling of synthetic rubber by aircraft turbine lubricants
• 3710.1 Molybdenum disulfide purity
• 3720.2 Molybdenum disulphide content of lubricating grease
• 3722.2 Molybdenum disulphide content of soapless thickened lubricating greases
• 3816.1 Film thickness of dry solid film lubricants
• 4001.3 Corrosion protection by coating: salt spray (feces) test
• 5003.2 Sludge-foaming tendencies of aircraft turbine lubricants
• 5101.7 Neutrality (qualitative)
• 5102.1 By extraction of acid and base numbers (colour indicator titration)
• 5304.5 Corrosiveness of greases or semi-solid products at 25 degrees
• 5305.1 232 degrees (corrosiveness of lubricants)
• 5306.5 Corrosiveness of emulsifiable cutting fluids
• 5307.2 Corrosiveness and oxidation stability of aircraft turbine
• 5308.7 Corrosivity and oxidation stability of light oils
• 5309.5 Corrosiveness of grease (copper strip, 100 degrees)
• 5321.2 Corrosion of lead by lubricating oils
• 5322.2 Corrosiveness of oil on bimetallic couple
• 5327 Fuel system ice inhibitors in hydrocarbon fuels (iodometric method)
• 5329.2 Corrosion protection (humidity cabinet)
• 5330 Fuel system anti-icing agent in hydrocarbon fuels (calorimetric method)
• 5331.1 Corrosion protection of steel against sulphur acid-salt spray with solid film lubricants
• 5333.1 Fuel system de-icing by freezing point depressing method
• 5340.2 Fuel system anti-icing for hydrocarbon fuels (refractometer method)
• 5341 Fuel system anti-icing for hydrocarbon fuels (redox method)
• 5342 Fuel system anti-icing for hydrocarbon fuels (hand refractometer method)
• 5350.1 Silting index of hydrocarbon fuels
• 5414.4 Resistance of grease to fuel
• 5415.1 Resistance of grease to water and 1:1 water ethanol solution
• 6050.1 Nitrate type ignition improvers in diesel fuel
• 6052.1 High temperature, High pressure spray ignition
• 6053.1 Manifold ignition test
• 6505.2 Load carrying capacity of universal gear lubricants by Timken machine
• 6508.2 Load carrying capacity of lubricating oils (Ryder gear machine)
• 6509.2 Gear fatigue properties of aircraft gas turbine lubricants at 204 degrees
• 6511.2 Load carrying capacity of lubricating oils at 204 degrees
• 6516.2 Release test of grease in helicopter bearings
• 6517 High temperature gear load carrying capacity of lubricating oils
• 6520.1 Extreme pressure properties of lubricants (four-ball testers)
• 7501 Low temperature torque test method for lubricating greases
• 7502 Solvent cleaning power by soil test method
• 10000 Material handling safety precautions

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