1、Al- 1722Febtwary 5, 1981CW4ERCIAL ITEM DESCRIPTIONGRAIN, ABRASIVE (SOFT BLJSTING)The General Services Administration! has authorized the use Ofthis commercial item description in preference to MilitarySpecification 141L-G-5634.This carcial itam description covers soft abrasive grains to be used as a
2、brasive blasting material forthe rsmval of carbon fmm metallic surfaces.Salient characteristics:Shall be of the following types, .ss speciffed:TYW 1 - Apricot pit shell turbojet approved grain (for use on aircraft jet engines and generaluse).Type !1 - Black walnut shell (for general purpose use).Typ
3、e Ill - Rice hull.Shall have the particle size distribution as shown in table 1:TABLE 1.Types I and II, percent retained Type 111, percent reta$nedU.S. standard screen size liininams Maxiln!m Minim nsxicaln-;! -;!90.030 .40 -60 -100 -0.0 -5.0 - .-.-14.05.0 - 65.0- -1.0 -0.0-18.0-Specific gravity of
4、types 1 and 11 shall be frmn 1.20 to 1.40; specific gravity of type Ill shall befmn 1.10 to 1.55.Hater content shall not exceed 10 percent by weight.The toluene soluble content shall not exceed 1.5 percent by weight.The product shall be free (in excess of 0.01 percent by weight) fran contaminating_t
5、terw hichco“lda ffectthes afeWofi ts. seo“metallics “rfaces. Oecayedormsldymaterial shall not be used.Certification. The contractor shall certify that the product offered meets the salient characteristics ofthis descripion, and that the product conforms to the producers own drawings, specifications.
6、 stindas.and quality assurance practices and is the same product sold in the centnercial marketplace. The6overmIs3nt reserves the right ta require proof of such conformance prior to first delivery and thereafteras may be othetwise provided for under the previsions of the contract.Regulatory requirem
7、ents. The manufacturer shall utilize recovered materials to the rr.axhim extentpracticable.Packaging, Dackinq, and marking,. The items shall be packaged in accordance with normal ccmercial practiceand packed to assure acceptance by ccmm!on carrier and provide product protection against loss and dame
8、geduring urdltiple shipments, handling, and storage. The shipping conteiner shall be in compliance withNational Motor Freight Classification and Uniform Freight Classification. Shipping containers shall bemarked as specified in the contract or order.FSC 5350Provided by IHSNot for ResaleNo reproducti
9、on or networking permitted without license from IHS-,-,-A-A-1722MILITARY INTERESTS:Custodians:AmIy - MRAir Force - 99Review activities:Amy - ME, ARNavy - SHUser activity:Navy - MCMilitary coordinating activity:Air Force - 99WeDaring activit:GSA - FSS2a71a71a71Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
