NPFC - MIL-I-52211
INDUSTRIAL GAS PRODUCTION EQUIPMENT, ACCESSORIES, AND SUPPORT ITEMS; PACKAGING OF
|Publication Date:||9 May 1994|
This specification covers the requirements for cleaning classifications and packaging (preservation, packing, and marking) of industrial gas (oxygen and nitrogen) production equipment, accessories, and associated support items (see 6.5 and 6.8).
Packaging (levels of protection) and cleanliness classifications are as follows, as specified (see 6.2):
Level A (see 3.6).
Level A (see 3.7, 3.7.1, and 3.7.2).
Level B (see 3.7, 3.7.1, and 3.7.2).
Level C (see 3.7, 3.7.1, and 3.7.2).
Commercial (see 3.7 and 3.7.3). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA 03Q42, Naval Sea Systems Command, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
The cleanliness classification shall be determined by the specific use application of the item. The cleanliness classification applies to the surfaces and passages that, when in use, will be contacted by the industrial gas. Exterior surfaces of items which will not be exposed to the industrial gas shall be cleaned in accordance with procedure C-1 of MIL-P-116 after completion of all other required cleaning, drying, and plugging or capping of all item openings. Items of critically cleaned systems which will have their condition degraded during installation (welding, soldering, brazing, and so forth) shall be initially classified for class E cleanliness and shall be reclassified as applicable and cleaned with the complete system or subsystem after the installation has been completed (for Navy, see MIL-STD-1330). If a cleanliness classification is not specified then class D cleanliness shall apply.
(a) Class A cleanliness. Class A cleanliness is the class of cleanliness applied to items that employ moving parts that will in use contact liquid or gaseous oxygen. Examples are: compressors, pumps, valves, flow meters, rotometers, and so forth.
(b) Class B cleanliness. Class B cleanliness is the class of cleanliness applied to items that employ fixed surfaces that will in use contact liquid or gaseous oxygen. Examples are: fixed plumbing fixtures, such as tubing, connectors, fittings, filters, rupture assemblies, and so forth.
(c) Class C cleanliness. Class C cleanliness is the class of cleanliness applied to pressure-measuring devices using a Bourdon tube or bellows-type movement. Examples are: pressure-monitoring devices and flow or liquid level differential pressure instruments.
(d) Class D cleanliness. Class D cleanliness is the class of cleanliness applied to items that will in use contact a compressed air atmosphere or a pure product fluid. Examples are: plumbing fixtures, such as tubing, connectors, fittings, filters, and so forth, of pure product circuits, controls, tanks, and so forth.
(e) Class E cleanliness. Class E cleanliness is the class of cleanliness applied to items that will in use not contact liquid or gaseous oxygen, an oxygen-enriched atmosphere or pure product fluids. An example is the plumbing fixtures of the process air circuit of a gas generating plant. This classification shall also be applied to items that are to be cleaned prior to installation in a system and then cleaned with the complete system or subsystem.
The cleaning classifications and the packaging requirements specified in this specification are intended to ensure proper and safe delivery, storage, stowage, and transportation and protection of... View More
The cleaning classifications and the packaging requirements specified in this specification are intended to ensure proper and safe delivery, storage, stowage, and transportation and protection of item cleanliness against degradation or recontamination of equipment, accessories, and supply support items for direct shipment to the Government activities; for material processed at a military activity; for a reference source in the preparation of section 5 of the commodity specifications; and for the preparation of cleaning and packaging requirements in acquisition documents.View Less