1、 AMSC N/A FSC 4210 INCH-POUND MIL-DTL-32238(AS) 15 March 2007 DETAIL SPECIFICATION EXTINGUISHER, FIRE, HALOCARBON (HFC-236fa), PORTABLE, WITH MOUNTING BRACKET, FOR AVIATION USE This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use b
2、y all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements and test methods for a hand-held rechargeable fire extinguisher containing 2.5 pounds of halocarbon HFC-236fa and a mounting bracket. 2. APPLICABLE DOCUMENTS 2.1 General. The d
3、ocuments listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this
4、 list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of thi
5、s document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 491000B120-3,
6、 Highway 547, Lakehurst, NJ 08733-5100 or emailed to thomas.omaranavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking p
7、ermitted without license from IHS-,-,-MIL-DTL-32238(AS) 2 FEDERAL STANDARD FED-STD-595 - Colors Used in Government Procurement: color 11105 DEPARTMENT OF DEFENSE SPECIFICATION MIL-L-85762 - Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible (Copies of these documents are ava
8、ilable online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Bldg 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specifi
9、ed herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ-Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies of the above publication are available from the American Societ
10、y for Quality, P.O. Box 3005, Milwaukee, WI 53201-4606 or http:/www.asq.org.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) INTERNATIONAL ASTM-B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus. (DoD Adopted) ASTM-D6541 - Standard Specification for HFC-236fa, 1,1,1,3,3,3-Hexafluor
11、opropane (CF3CH2CF3) (Copies of the above publications are available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http:/www.astm.org.) UNDERWRITERS LABORATORY UL711 - Fire Extinguisher, Rating and Fire Testing of. (DoD Adopted) UL2129 - Standard for Halocarbon
12、Clean Agent Fire Extinguishers. (DoD Adopted) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32238(AS) 3 (Copies of the above standards are available from Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096 or .) 2
13、.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMEN
14、TS 3.1 First article. When specified (see 6.2), extinguishers shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Unless otherwise specified, the extinguisher shall meet the requirements of UL2129. 3.2.1 Extinguishant. Each extinguisher shall be charged with 2.5 pou
15、nds (lb), +2 ounces, -0 ounces of halocarbon (HFC-236fa) as specified in UL2129 or ASTM-D6541 and pressurized to 125 pounds per square inch (psi) by adding the nitrogen gas specified in UL2129. 3.2.2 Cylinder. The cylinder shall be constructed from an aluminum, steel, or stainless steel alloy that m
16、eets all the requirements of this specification. 3.2.2.1 Cylinder age. Fire extinguisher cylinders delivered to the Government shall be not older than one year from the date of manufacture to the date received by the procuring activity. 3.2.3 Mounting bracket. The mounting bracket shall be construct
17、ed of materials that meet the applicable requirements of this specification. 3.3 Design and construction. 3.3.1 Extinguisher. Unless otherwise specified herein, the fire extinguisher assembly design and construction shall conform to UL2129. The weight of fire extinguisher assembly shall be not great
18、er than 9 lb. 3.3.1.1 Pressure gauge. The fire extinguisher shall be equipped with a pressure gauge to indicate the pressure in the cylinder. The gauge face shall be divided into 3 zones by color (red/green/red) and shall be in accordance with UL2129. The acceptable operating pressure range shall be
19、 indicated when the gauge needle is in the green zone. Low or high pressure shall be indicated when the needle is in that respective red zone. 3.3.1.2 Locking pin and seal. The operating mechanism of the extinguisher shall be supplied with a corrosion resistant locking pin that is attached to the va
20、lve handle with a chain or Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32238(AS) 4 similar device to prevent loss of the pin. A plastic locking pin retainer shall be included that prevents tampering with the extinguisher and breaks off up
21、on removal of the locking pin prior to operating the extinguisher. 3.3.2 Mounting bracket. The bracket design shall permit flush mounting to the bulkhead (see figure 1). Each bracket shall be interchangeable with any extinguishers approved under this specification without causing any visible damage.
22、 When properly installed on the mounting bracket, the cylinder shall not contact the mounting fasteners. Additionally, the cylinder shall not be in contact with raised areas or edges on the bracket that cause gouging or wear on the cylinder wall. 3.3.2.1 Mounting bracket fastening mechanism. The mec
23、hanism shall represent the simplest design consistent with the easy removal of the extinguisher from any mounted position. The unfastening process shall not require more than two motions and the use of one hand to release the extinguisher whether or not the user is wearing heavy gloves or arctic mit
24、tens. All moveable parts shall remain attached to the bracket to prevent foreign object damage. Once unfastened, the bracket parts shall not interfere with quick removal of the extinguisher from any position. The overall assembly design shall permit the operator to remove the extinguisher by lifting
25、 the cylinder not greater than 0.50 inch away from the bracket base and then away from the bracket. 3.3.3 Dimensions. Dimensions shall be as specified on figure 1. 3.4 Exterior surface treatments. All exterior metal surfaces shall be treated to resist atmospheric corrosion. Coatings containing cadmi
26、um, lead, or chromium shall not be used. The fire extinguisher cylinder, handle, lever and bracket shall conform to FED-STD-595, color number 11105, or other red color approved by the Naval Air Systems Command. The valve body and nozzle shall be black. Color samples shall be approved the Naval Air S
27、ystems Command. 3.4.1 Night vision imaging system (NVIS) compatibility. When finish materials are illuminated with NVIS compatible lighting as specified in 4.5.13, the resulting emissions shall be not greater than the NVIS radiance limits of MIL-L-85762 before or after environmental tests. 3.5 Perfo
28、rmance characteristics. Unless otherwise specified, the fire extinguisher shall meet the requirements of UL2129 and the following performance characteristics. 3.5.1 Performance rating. The fire extinguisher shall have an extinguishing performance rating equal to 2B:C in accordance with UL711. 3.5.1.
29、1 Extinquishments. Conditioning and testing shall be in accordance with UL711 and 4.5.3. No greater than five extinguishing attempts for each condition shall be allowed to demonstrate the two successive extinguishments. Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
30、ense from IHS-,-,-MIL-DTL-32238(AS) 5 3.5.2 Fragmentation resistance. The fire extinguisher cylinder shall remain unshattered and in one piece, when tested in accordance with 4.5.4. 3.5.3 Crash retention. The bracket shall retain the extinguisher under the loading conditions specified in 4.5.5. 3.5.
31、4 Operation and angle of discharge. The fire extinguisher, when operated at an angle of 70 degrees from the vertical, shall discharge at least 90 percent (by weight) of the rated capacity of the clean agent, when tested as specified in 4.5.6. Dimensions are in inches. 3.375 0.125 OPERATING INSTRUCTI
32、ONS WARNING STATEMENT MAINTENANCE INSTRUCTIONS LOT NUMBER INFORMATION BRACKET INFORMATION 1.380 1.380 1.0 0.5 1.0006.000 6.0007.000 max. 14.500 max. 8 X 0.281 thru holes ( 0.030) FIGURE 1. Fire extinguisher and mounting bracket. 3.5.5 Discharge duration. The duration of effective discharge, as speci
33、fied by UL2129, shall be not less than 8 seconds at 70 F (21 C) and not less than 6 seconds at -40 F (-40 C), when tested as specified in 4.5.7. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32238(AS) 6 3.5.6 Operating temperature limit and
34、 discharge range. There shall be no leakage from the fire extinguisher during the conditioning cycles, when tested in accordance with 4.5.8. The fire extinguisher shall discharge not less than 90 percent (by weight) of the rated capacity of the clean agent with a discharge range of not less than 4 f
35、eet, when tested immediately after each conditioning cycle specified in 4.5.8. 3.5.7 Temperature cycling. After testing as specified in 4.5.9, the extinguisher shall not show any leakage and shall discharge not less than 90 percent by weight of the halocarbon. 3.6 Salt fog. The fire extinguisher ass
36、embly (fire extinguisher and bracket) finish shall provide substrate corrosion resistance. All parts of the assembly, including the finish shall demonstrate compliance with UL2129 subsequent to the testing in accordance with 4.5.10. 3.7 Rough usage. The fire extinguisher shall meet the rough usage r
37、equirements of UL2129, when tested in accordance with 4.5.11. 3.8 Vibration. The fire extinguisher and bracket shall meet the vibration requirements of UL2129, when tested in accordance with 4.5.12. 3.9 Identification and instructions. A permanent label shall be affixed to the cylinder as shown on f
38、igure 1 in accordance with UL2129 and 3.9.1 through 3.9.4, herein. The bracket shall be labeled as specified in 3.9.4. 3.9.1 Operating instructions and warning statement. Operating instructions and a warning statement shall contain the information below in the sizes indicated. The text shall be perm
39、anent and legible. Letter size (inch) Label information3/16 EXTINGUISHER, FIRE, HALOCARBON (HFC-236fa) 2.5 LB, 2B:C (Insert use code symbol pictographs for Class B, Class C rating. See UL2129) 3/16 TO OPERATE: 5/32 1. Pull locking pin. (Insert pictograph) 5/32 2. Point extinguisher to base of fire.
40、(Insert pictograph) 5/32 3. Depress push lever for discharge and sweep side to side. (Insert pictograph) WARNING: 3/16 1. The concentrated agent when applied to fire can produce toxic by-products. 5/32 Avoid inhalation of these materials by evacuating and ventilating the area. Do not use in confined
41、 spaces less than 38.5 cubic feet per extinguisher. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32238(AS) 7 5/32 2. Avoid contact with skin or clothing. 5/32 3. Do not direct discharge toward face. 3.9.2 Maintenance instructions and logis
42、tics information. Maintenance instructions and logistics information shall be placed below the operating instructions and shall contain the following information: Letter size (inch) Label information3/16 FOR MAINTENANCE 3/16 CYLINDER (Material: aluminum, steel or stainless steel) 3/32 NATIONAL STOCK
43、 NUMBER (NSN) 3/16 MANUFACTURERS PART NUMBER _ 7/64 Replace with a charged extinguisher, manufacturers part number _, immediately after use or 12 years after date of manufacture. 5/64 Visually inspect extinguisher every six months. Replace if mechanical damage is found or if indicated pressure is no
44、t in the proper range. 3/32 MANUFACTURERS NAME AND CAGE CODE 3/32 EXTINGUISHER GROSS WEIGHT _ LB _OZ 3/32 Intended expellant gas pressure: 125 PSI 7/64 Property of the U.S. Government 3.9.3 Lot number information. A permanent label containing the lot number and contract number information shall be a
45、ffixed to the cylinder in the sizes indicated below: Letter size (inch) Label information3/32 CONTRACT NUMBER 3/32 LOT NUMBER 3/32 DATE OF MANUFACTURE MONTH_ YEAR_ 3.9.4 Mounting bracket label. The mounting bracket shall have a permanently affixed label with the following information in the indicate
46、d size: Letter size (inch) Label information3/32 FIRE EXTINGUISHER BRACKET 3/32 Component of PART NUMBER _ extinguisher assembly. 3.10 Workmanship. The fire extinguisher and bracket assembly shall be uniform in quality and shall be free from irregularities, defects, or foreign matter that could affe
47、ct safety, performance, reliability, or durability. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32238(AS) 8 4. VERIFICATION 4.1 Classification of inspection. The examination and testing of the fire extinguisher assembly shall be classifie
48、d as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall consist of examinations and tests specified in this specification, and shall be performed on samples from the same production lot, when specified (see 6.2). Failure of any examination or test shall result in first article disapproval. 4.3 Conformance inspection. Conformance inspection shall consist of the tests and examinations specified in tables I and II. Unless otherwise specified, testing shall be done at the test conditions specified i
