DLA A-A-52430 A-2013 PADS CUSHIONING PERSONNEL-PROTECTION VEHICULAR (METRIC).pdf
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1、AMSC N/C FSC 2590 METRIC A-A-52430A 19 August 2013 SUPERSEDING A-A-52430(AT) 15 February 1993 COMMERCIAL ITEM DESCRIPTION PADS, CUSHIONING: PERSONNEL-PROTECTION, VEHICULAR (METRIC) The General Services Administration has authorized the use of this commercial item description for all federal agencies
2、. 1. SCOPE. This commercial item description (CID) covers the general requirements for pads, cushioning: personnel-protection, vehicular (metric). Pads, cushioning: personnel-protection, vehicular (metric) covered by this CID are intended for commercial/industrial applications. 2. CLASSIFICATION/PAR
3、T OR IDENTIFICATION NUMBER (PIN). This CID uses a classification system which is included in the PIN as shown in the following example (see 7.1). AA52430 - 001 CID Dash number number 3. SALIENT CHARACTERISTICS. 3.1 Interface and physical dimensions. Pads, cushioning: personnel-protection, vehicular
4、(metric) supplied to this CID shall be as specified herein. 3.1.1 Materials. Materials shall be as specified in applicable drawings and shall meet the requirements specified herein. They shall be free of defects which adversely affect performance, serviceability, or durability of the finished produc
5、t. Beneficial comments, recommendations, additions, deletions, clarifications, etc., and any data that may improve this document should be sent to: DLA Land and Maritime, ATTN: VAI, P.O. Box 3990, Columbus OH 432183990, or email fluidflow.dla.mil. Since contact information can change you may want to
6、 verify the currency of the address information using the ASSIST Online database at https:/assist.dla.mil. Reinstated as of 21 October 2002. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52430A 2 3.1.2 Types and Classes. CID dash number shall b
7、e as specified in table l. TABLE l. CID Dash number relationship to type and class. CID dash number Type information Previous class code Class information 001 Type I - Facial contact CS Closed cell, expanded rubber. 002 Type l - Facial contact VS Cellular vinyl elastomer. 003 Type l - Facial contact
8、 WF Foam rubber. 004 Type ll - Head and body contact. CS Closed cell, expanded rubber. 005 Type ll - Head and body contact VS Cellular vinyl elastomer. 006 Type ll - Head and body contact WF Wool felt 3.1.3 Type I class CS pads. Base material shall be of closed-cell rubber conforming to grade 2A1 as
9、 specified in ASTM D1056. 3.1.4 Type I class VS pads. Base material shall be of cellular expanded polyvinyl chloride of density equivalent to grade 2A1 as specified in ASTM D1056. 3.1.5 Type I class FR pads. Base material shall be of foam rubber conforming to grade 1C1 as specified in ASTM D1056. 3.
10、1.6 Type II class CS and VS pads. Base material shall be as specified in 3.1.3 and 3.1.4, respectively. 3.1.7 Type II class WF pads. Base material shall be a firm pad mechanical-roll wool felt. The wool felt shall be mildew and moisture resistant in accordance with accepted commercial treatment proc
11、edures. 3.2 Design and construction. The cushioning pad shall be an assembly consisting of cushioning material which shall meet the requirements specified herein and shall have a smooth, tough surface coating. Metal inserts, when specified, shall be zinc and dichromate plated mild steel or alodine c
12、lad aluminum and shall be securely attached as shown in applicable drawings (see 7.5). Pads shall be designed for application by cementing to painted or unpainted surfaces, or in the case of metal backed pads, by welding, riveting, or bolting as specified in applicable drawings. 3.2.1 Welding, rivet
13、ing, or bolting. Pads intended to be bolted, riveted, or welded in place shall include provisions for such attachments as shown in applicable drawings (see 7.5). Welding tabs shall extent 3/4 inch beyond pads as shown in applicable drawings. Welding tabs shall not be plated. 3.2.2 Type I pads. When
14、specified in applicable drawing (see 7.5), reinforcement shall be firmly bonded to metal insert with Polychloroprene rubber base oil resistant type general purpose adhesive. Reinforcement shall consist of woven nylon or Dacron cloth netting and shall be securely cemented, as specified, over back of
15、backing plate for 13 millimeters (mm) and up the edge of the pad for 13 mm. In no case shall reinforcement come to full height of pad. Surface coating of Polychloroprene not less than 0.5 mm thick shall smoothly cover entire assembly, except attaching lugs, as shown in applicable drawing (see 7.5).
16、3.2.3 Type II pads. Construction shall be as specified in 3.2.2 except that plain or flat knit cotton surgical stockinet or nylon or Dacron cloth netting shall be securely cemented, as specified, over back or backing plate for 13 mm (classes CS and VS). Polychloroprene coating shall be not less than
17、 0.8 mm thick. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52430A 3 3.2.4 Alternate coating and reinforcement. Unless otherwise specified (see 7.5), coating shall be of sprayable, strippable vinyl material for external pads only. Coating shal
18、l be not less than 0.5 mm thick for type I pads and not less than 0.8 mm thick for type II pads. As an alternate reinforcement for type II, class CS and VS pads, pressure sensitive thermosetting adhesive type electrical insulation tape with cotton fabric backing shall be used. Surface coating as spe
19、cified in 3.2.2 shall be applied. 3.2.5 Dimensions. Pad dimensions shall conform to applicable drawings (see 7.5). Except in restricted locations, minimal thickness of 19 mm shall be maintained. 3.3 Performance. 3.3.1 Bonding. Pads bonded to metal inserts shall withstand temperature range of minus 4
20、0 2 degrees Celsius (C) to plus 70 1C without bonding separation, embrittlement, or cracking. Force required to separate plies or coatings shall be not less than 2.3 kg per 25.4 mm of width. 3.3.2 Softness. Pads shall conform to softness range specified in table lI. Tests shall be made on finished p
21、ad at locations that assure uniformity near edges, as well as at any location of pad, provided periphery of indenter does not extend beyond apex of curvature at edges of pad surfaces. TABLE lI. Loads on 25.4 mm ball to cause indentation of 1/4 of pad thickness. Type Temperature (C) Test weight (kg)
22、I Facial II Body I Facial II Body + 21 to + 24 + 21 to + 24 - 40 to - 43 - 40 to - 43 2.3 4.5 13.6 15.9 3.3.3 Resistance to extreme temperature. Pads shall evidence no cracks, delaminations, or adhesive failure after 72 hours exposure at 70C and 72 hours at -40C. 3.3.4 Fire resistance. Finished pads
23、 shall not flame or glow for more than 30 seconds after being subjected to a fire resistance test in accordance with method 5903 of FED-STD-191. Flame and glow time shall be combined to determine conformance to the requirement. 3.3.5 Water absorption. Complete pads shall show no water absorption exc
24、eeding 0.5 percent by weigh of finished pad, excluding weight of metal parts. To determine water absorption, three finished pads shall be weighed and immersed in water at 24 3C with upper surface of each pad approximately 15 mm below surface of water. After 24 hours of immersion, each sample shall b
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