1、Designation: C 224 78 (Reapproved 2004)e1Standard Practice forSampling Glass Containers1This standard is issued under the fixed designation C 224; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEThe designation of the MIL-STD was editorially corrected in May 2004.1. Scope1.1 This practice covers the sampling of glass containers(for example,
3、 bottles, jars, and so forth) for performing suchtests as mechanical strength, dimensions, and other measurablecharacteristics, and for visual examination.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of
4、this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 147 Test Methods for Internal Pressure Strength of GlassContainersC 149 Test Method for Thermal Shock Resistance of
5、 GlassContainers2.2 Military Standard:MIL-STD 105 E Sampling Procedures and Tables for In-spection by Attributes33. Classification3.1 For sampling purposes the pertinent characteristics ofglass containers are classified as follows:3.1.1 Grade of annealing (relative annealing stress).3.1.2 Hydrostati
6、c pressure.3.1.3 Thermal shock strength.3.1.4 Visible characteristics readily graded or judged byvisual examination, namely, deformities.3.1.5 Mold characteristics of a structural character (asdistinguished from appearance) where the component part orunit of the manufacturing process that controls t
7、he character-istic is the mold or mold cavity (as distinguished from thefurnace, feeder, or lehr), namely, capacity, dimensions.4. Number of Specimens4.1 Unless otherwise specified, the minimum number ofspecimens for the various classifications of Section 3 is givenin Table 1.5. Procedure5.1 Continu
8、ous ProcessSampling from a continuousmanufacturing process shall be in accordance with a timeschedule. For those characteristics affected by the degree ofannealing, take the samples from the exit of the lehr (or frompacked cases whose continuity in point of time is known). Forthose characteristics n
9、ot affected by the degree of annealing,quickly cooled samples may be taken ahead of the lehr.5.2 LotSelect the sample from a lot by a procedureconsistent with the purpose of the sample. For some purposes,the sample may come from the lot as a whole; for otherpurposes, it may be necessary to sort the
10、lot before sampling.Such sorting may be for the purpose of segregating lots basedon style, color, size, manufacturer, or mold designation, asexamples. Take the specimens composing the sample accord-ing to the principles of random sampling; for instance, do nottake all the specimens from the same sid
11、e or location of the lot.If the containers are packed in cases, remove the cases from thelot at random. Take specimens for evaluation, in turn, atrandom from these cases. The minimum number of cases to beselected shall be determined in accordance with MIL-STD105 E (see 5.2.1) or that number required
12、 to provide thenumber of individual containers to be evaluated (see 5.2.2),whichever quantity represents the larger number of cases. Ifmore than one independent evaluation can be performed on thesame container, no additional sample is required for themultiple evaluation.5.2.1 Minimum Number of Cases
13、 Determined in Accor-dance with MIL-STDDetermine the number of cases in thelot and use this number as “lot size” for Table 1 of MIL-STD105 E. Find the corresponding sample size code letter (nor-mally Column II) of Table 1. Using the first and secondcolumns of Table II-A, find the sample size corresp
14、onding tothis code letter. This sample size will designate the number of1This practice is under the jurisdiction of ASTM Committee C14 on Glass andGlass Products and is the direct responsibility of Subcommittee C14.07 on GlassContainers.Current edition approved April 1, 2004. Published May 2004. Ori
15、ginallyapproved in 1953. Last previous edition approved in 1999 as C 224 78 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary pa
16、ge onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.cases to be selected at random f
17、rom the lot. As far as possible,an equal number of individual containers shall be taken forevaluation from each case selected.5.2.2 Minimum Number of Cases Determined by Number ofIndividual Containers to be EvaluatedIn the event that 5.2.1does not provide the number of containers required for theeva
18、luation, select sufficient cases at random to provide thenecessary number of containers.NOTE 1An example of minimum sampling using MIL-STD 105 E isas follows:A lot of 1000 cases of 24 containers each would call for sample sizecode letter J (Column II, Table 1), corresponding to 80 cases (Table II-A)
19、.The minimum sample size for visible characteristic determinations for theoriginal lot of 24 000 containers is designated by sample size code letterM. Turning to Table X-M-2, it can be seen that 315 containers (approxi-mately 4 per case selected) are needed for a single sample, 200 (212 percase) fol
20、lowed by 200 (212 per case) for the respective first and secondsamples for double sampling, and 80 (1 per case) for each step of multiplesampling. The containers sampled may be used to determine the relativefrequency of occurrence of containers from individual mold cavities.Containers that have pass
21、ed the visual examination may be used toprovide samples (chosen at random from among the cases) for theannealing, internal pressure, thermal shock, and dimensional evaluationsas required.6. Report6.1 Report the following information:6.1.1 Style, size, color, and manufacturer of the lot evalu-ated,6.
22、1.2 For continuous production sampling, the place ofmanufacture, the time of sampling, the individual mold desig-nation (if pertinent),6.1.3 For lot sampling, the shipment identification, or ware-house location, as pertinent,6.1.4 Sample size, and the number of cases sampled (iffrom lots in cases),6
23、.1.5 Method of taking the specimens, and6.1.6 Results of the evaluation or the disposition of the loton the basis of the sample taken.7. Keywords7.1 glass containers; sampling procedureASTM International takes no position respecting the validity of any patent rights asserted in connection with any i
24、tem mentionedin this standard. Users of this standard 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 co
25、mmittee and must be reviewed every five years andif 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
26、 meeting of theresponsible technical committee, which 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 Dri
27、ve, 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.o
28、rg).TABLE 1 Minimum Number of Specimens for SampleClassification (Test or Examination to be Madeon Specimen)Continuous Production (Lehr) Lot, Minimum Numberof ContainersMinimum Number Time ScheduleAnnealing 3A3 h or less 20Internal pressure 1 roundB3 h or less 50CThermal shock 1 roundBvariableD50CVi
29、sible characteristics not applicableEnot applicableEFDimensional characteristics 1 round variableG50HAThe three containers shall represent both sides and center of lehr.BA “round” is one container from each mold or mold cavity of the forming machine. Test to be made on pieces that have passed visual
30、 inspection.CFor a pass test (attribute testing), 50 containers, randomly selected, but representative of the mold cavities present in the lot, shall be tested as the first sample in adouble sampling method, followed, when necessary, by a second sample of 50 containers equally random and representat
31、ive of all mold cavities present. The acceptanceand rejection number shall be chosen from Table X-J-2 of MIL-STD 105 E in accordance with the agreed upon acceptable quality level. Progressive tests (variable testing)shall be based on a single sample of 50 containers. Test Methods C 147 and C 149 sha
32、ll be followed for test details.DBecause of the great variability of potential thermal shock requirements in the trade and the difference in susceptibility to thermal shock of various designs, theappropriate time schedule for each situation must be individually determined.EFor this category, a sampl
33、ing procedure normally is unnecessary since 100 % inspection is usually carried out.FWhen the intention of the sampler is to classify the ware into acceptable and nonacceptable categories, it is recommended that sampling agreements be made betweenpurchaser and manufacturer on the basis of MIL-STD 10
34、5 E. This method recommends sample sizes on the basis of size of a lot and expected frequency of occurrenceof objectionable deficiencies.GBecause of the great variation in sizes and types and variations in requirements among the various characteristics involved, a definite schedule is impractical. T
35、imingwill depend on the degree of control necessary for the characteristics involved. Typical dimensions are height, diameter, weight, capacity, lettering or decoration (positionand size), and the principal dimensions of the finish (closure-holding contours).HFifty containers shall be taken as a first sample, and fifty containers as a second sample, following the principle of Table X-J-2 of MIL-STD 105 E for attribute gaging.A minimum sample of one from each mold cavity represented in the lot shall be taken for measurement by variables.C 224 78 (2004)e12
