MIL-STD-1330-SUP-2 Precision Cleaning and Testing of Shipboard Oxygen, Helium, Helium-Oxygen, Nitrogen, and Hydrogen SystemsThis standard provides the requirements for precision cleaning and testing of oxygen or oxygen-enriched systems and components; oxygen generating plants including nitrogen, hydrogen, and demineralized water support systems and components; and helium, helium-oxygen, and hydrogen life support systems and components. Each activity will implement the applicable requirements of this document through a locally prepared and approved procedure. Activities subject to additional quality assurance requirements such as NAVSEA SS800-AG-MAN-010/P-9290 or NAVSEA SS521-AA-MAN-010 will obtain procedure approval from the applicable certifying activity.

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MIL-STD-1330D(SH)

20 September 1996

TABLE II. Cleanroom and controlled area requirements.

Attribute

Requirement

Class 100,000 cleanroom 1/

General cleanroom

Controlled area

Structure

5.1.1

Class A

Class B

Class C

Maintenance

5.1.2

Class A

Class B

Average air temperature

5.1.3

72 ± 5EF

72 ± 10EF

Uncontrolled

Average relative humidity

5.1.3

30 to 50%

70% maximum

Uncontrolled

Air filtration

5.1.4

Type A

Type B

Ventilation and air pressure

5.1.5

Class A

Class B

Class C

Personnel clothing

5.1.6

Class A

Class B

Tools and equipment

5.1.7

1/ A class 100,000 cleanroom in accordance with FED-STD-209 shall be used

for critical applications. For all other applications, a general cleanroom

shall be used.

5.1.1 Structure.

Class A:

Class B requirements shall apply. Additionally, best commercial practices shall be employed in the use of materials, construction, filtration, clothing, personnel, and temperature, pressure, and humidity control to achieve an airborne particulate cleanliness level equivalent to FED-STD-209 class 100,000 or better. Refer to MIL-HDBK-407 for additional guidance.

Class B:

(a) A permanent enclosure comprised of a rigid frame with clearly defined walls, ceilings, and floor, all adequate to prevent the entry of contamination from the surrounding environment.

(b) The surface of the walls, ceiling, and floor shall be fabricated or coated with material that minimizes attraction of dirt and is easily cleaned. Refer to MIL-HDBK-407 for additional guidance.

(c) Where dirt may be brought into the clean area, preventative measures such as anterooms, shoe covers, or tack mats shall be employed. Anterooms should provide for changing and stowing of clothing, examination of tools and equipment, and personnel access to the clean area. Washing, toilet facilities, and storage facilities for maintenance of equipment should be provided in the immediate area where desirable.

(d) Furnishings and equipment such as work benches, chairs, and racks shall be constructed and finished with materials that will not produce dust or particulate as a result of chipping, flaking, or rusting. Paint should be hard and non-flaking or non-chalking. Furnishings likely to be abraded or bumped should be constructed of either stainless steel or non-fracture type plastic. Refer to MIL-HDBK-407 for additional guidance.

(e) Work that produces airborne dust, dirt, or particulate should not be performed in a cleanroom. Welding and brazing shall not be performed in a cleanroom.