MIL-STD-1411 Inspection And Maintenance Of Compressed Gas CylindersThis standard defines the requirements and procedures for the inspection, maintenance, and charging of government-owned cylinders by gas suppliers. This standard is intended to assure that the cylinders are serviced to meet safety standards and to assure that the quality of the gas supplied is not degraded by a government container. This standard is also applicable to cylinders that require reconditioning, repair, and rebuilding to assure a level of renewal that meets the needs of the government and industry in gas handling. This standard is also to be a guide when cylinders are sorted, graded, and classified for storage, salvage, or disposal in depot facilities.

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Cylinder gas service

Detailed requirements

Acetylene

Fuel gas mix

Air - human respiration

Air - industrial

Argon - inert

Butane - propane

Carbon dioxide

Carbon monoxide

Chlorine

Fluorocarbons

Helium - inert

Hydrogen

Inert  nitrogen O.F.

Inert  nitrogen O.T.

Oxygen - ABO

Oxygen - technical

Oxygen - medical

Methyl bromide

Sulfur hexafluoride

Ammonia anhydrous

Detailed requirements

Cylinder maintenance2

5.3

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5.3

Periodic testing

5.3.1

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5.3.1

Hydrostatic test

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5.3.1.1

Ultrasonic examination1

5.3.1.1

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5.3.1.1

External visual inspection

5.3.1.2

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5.3.1.2

General cylinder maintenance

5.3.2

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5.3.2

Neck threads cleaning

5.3.2.1

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5.3.2.1

Droplight testing

5.3.2.2

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5.3.2.2

Cylinder structural maintenance

5.3.2.3

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5.3.2.3

Internal cylinder surface cleaning

5.3.2.4

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5.3.2.4

Internal cylinder drying

5.3.2.5

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5.3.2.5

Valves and PRDs

5.3.2.6

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5.3.2.6

Gen. maint. of acetylene cylinders

5.3.3

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5.3.3

Chlorine cylinder maintenance

5.3.4

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5.3.4

Special handling

5.3.5

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5.3.5

External cylinder surface maint.

5.3.6

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5.3.6

Cylinder valve protection caps

5.3.6.1

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5.3.6.1

Paint, decal, and rust removal

5.3.6.2

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5.3.6.2

Metal surface pretreatment

5.3.6.3

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5.3.6.3

Prime coating

5.3.6.4

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5.3.6.4

Finish coating

5.3.6.5

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5.3.6.5

Touch-up painting

5.3.6.6

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5.3.6.6

Cylinder charging

5.4

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5.4

Permanent gases

5.4.1

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5.4.1

Liquefied gases

5.4.2

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5.4.2

Ammonia gas

5.4.2.1

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5.4.2.1