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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MIL-STD-1411B

4.2 Special procedures. When a gas commodity contract is written to include the servicing of government cylinders on a cost per unit of volume or unit of weight base, the only additional expense allowed shall be the cost of returning government property to the procuring agency. This procedure has been established in servicing fluorocarbon contracts. The government cylinder shall be inspected and serviced in accordance with the requirements of 49 CFR and the CGA pamphlets referenced herein. The contractor shall exercise the same procedures and practices used in maintaining his own cylinders.

5. DETAILED REQUIREMENTS

5.1 Receiving inspection. The supplier shall inspect the government-owned cylinders received for charging or reconditioning in accordance with the PID. The number of acceptable cylinders shall be recorded to identify a specific contract. Cylinders not acceptable shall be returned to the government agency. The receiving inspection is intended to limit the handling of cylinders that are not reclaimable for use in a contractor work order. Procedural outlines for receiving inspection may be incorporated in a comprehensive serviceability inspection at the discretion of the contractor.

5.1.1 Cylinder identification permanent markings. Each cylinder shall have its permanent markings inspected for proper identification, legibility, and accuracy. Permanent markings shall be embossed, stamped, or etched into the shoulder of DOT 3A or DOT 3AA cylinders and into a place of high visibility on low-pressure DOT 4 and DOT 8 cylinders. Cylinders with improper markings, illegible markings, or inaccurate markings shall be scheduled for maintenance as applicable, or shall be rejected and returned to the government agency.

5.1.1.1 Serial number. The serial number on the cylinder shall be inspected for legibility as the identification number for the specific cylinder. The serial number is placed on the cylinder at the time of manufacture and is registered with the Associate Administrator for Hazardous Materials Safety of the Office of Hazardous Materials Safety. Duplicates are never issued and numbers shall display no sign of tampering or change.

5.1.1.2 DOT specification and service pressure. The cylinder DOT specification and service pressure markings shall be inspected to assure that the cylinder is compatible with the requirements of the PID or contract. The cylinder shall be in accordance with 49 CFR for intended use. The service pressure is related to the sidewall thickness and the level of proof testing at fabrication, and is used as an index for hydrostatic testing throughout the cylinder life. Nonconforming cylinders shall be returned to the government agency for disposition.

5.1.1.3 Identification symbol. The cylinder shall be inspected for its identification symbol, which identifies the manufacturer, the actual owner, or the user of the cylinder, as applicable. The responsible party is registered with the Associate Administrator for Hazardous Materials Safety of the Office of Hazardous Materials Safety and is a source of technical information regarding the date, material, and process of manufacture for the cylinder. This information is necessary for rebuilding and maintenance of the cylinder throughout its useful life.