1、Designation: C 322 03Standard Practice forSampling Ceramic Whiteware Clays1This standard is issued under the fixed designation C 322; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures for sampling bulk andbagged shipments of ceramic whiteware clays.2. Sampling2.1 Where a bulk shipment consists of lumps, a
3、 number ofsamples shall be taken from different parts of the rail car ortruck during unloading, so that the final sample will representan average of all parts of the shipment from top to bottom. Fora 30-ton (27-Mg) unit, no less than 20 samples of approxi-mately 10 lb (4.5 kg) each shall be taken fr
4、om different parts ofthe rail car or truck. This may be done by removal duringloading or unloading, at spaced intervals. The lumps shall thenbe broken to pieces no larger than 4 in. (102 mm), in the largestdimension, and the several samples shall be made into acomposite lot, by turning with a shovel
5、 on a clean floor. Thecomposite shall then be quartered or riffled to provide a 10-lblaboratory sample.2.2 Sampling of hopper car or hopper truck shipments is tobe done during unloading of the car or truck.2.3 Where a bulk shipment consists of shredded or coarselyground clay, sampling shall be done
6、at 20 points for a 30-ton(27-Mg) unit; the samples may be taken with a shovel, or witha grain sampler, if the form of the clay permits. The samples sotaken shall then be mixed thoroughly, and quartered or riffledto form a 10-lb (4.5kg) (or proportionately larger) laboratorysample.2.4 For bagged lots
7、 of ground or air-floated clay, the numberof samples taken shall depend on the number of units in ashipment. A grain-sampler or similar sampling instrument shallbe used to take samples which then shall be combined, mixed,and quartered or riffled to obtain a 10-lb (4.5-kg) laboratorysample. Where a s
8、hipment consists of 100 bags or less, thenumber of bags sampled at random shall be not less than 5 andpreferably 10. When the number of bags is greater than 100 butless than 500, the number of bags sampled shall not be lessthan 15. For lots of from 500 to 1000 bags, 20 bags shall besampled. For ship
9、ments of 1000 to 2000 bags, 30 bags shall besampled at random.2.5 When the clay is shipped in slurry form a representativesample may be obtained by taking a single grab sample fromany portion of the shipment except by skimming the topsurface. If the shipment has been unagitated for a period of twowe
10、eks or more the shipment can be agitated by inserting an airlance to the bottom of the vessel for a period of ten minutes.One two-liter sample is required.2.6 Preshipment samples of slurries and bulk materials fromthe supplier can be used, replacing the sampling done when theshipment is received.3.
11、Precision and Bias3.1 Precision It is not possible to specify the precision ofthe procedure in this test method beyond stating that the samplesize must be +/- 10% of the weight specified.3.2 BiasNo information can be presented regarding thebias of this procedure.4. Keywords4.1 clay; sampling1This pr
12、actice is under the jurisdiction of ASTM Committee C21 on CeramicWhitewares and Related Products and is the direct responsibility of SubcommitteeC21.04 on Raw Materials.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1953. Last previous edition approved in 1997 a
13、s C 322 82 (1997)e1.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stand
14、ard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andi
15、f not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, wh
16、ich you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C322032
