1、Designation:C14786(Reapproved 2015)Standard Test Methods forInternal Pressure Strength of Glass Containers1This standard is issued under the fixed designation C147;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of thebreaking strength of glass containers when subjected to internalpressure.These test
3、 methods are intended to determine thepressure strength of containers manufactured to contain prod-ucts reasonably expected to develop a sustained pressure of138 kPa(20 psi)or greater,after processing.Two test methodsare covered as follows:SectionsTest Method AApplication of Uniform Internal Pressur
4、e for aPredetermined Period5 7Test Method BApplication of Internal Pressure Increasing at aPredetermined Constant Rate8 101.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of t
5、hesafety concerns,if any,associated with its use.It is theresponsibility of the user of 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:2C224 Practice for Sampling Gla
6、ss Containers2.2 ASTM Adjuncts:Single-head hydraulic testing machine(8 blueprints)33.Sampling3.1 Methods of sampling a minimum lot from a group ofcontainers of a given type are given in Practice C224,for thevarious situations to which it may apply.4.Precision and Bias4.1 Statements regarding either
7、precision or bias of theinternal pressure test results are not possible because suitableinternal pressure reference test materials are not available.4.2 Test Method AThe pressure test precision is within onehalf the incremental step size used at failure.Pressure test biasis generally within 61%of fu
8、ll scale.4.3 Test Method BThe pressure test precision is within 61psi(7 kPa).Pressure test bias is generally within 6%of fullscale.TEST METHOD AAPPLICATION OF UNIFORMINTERNAL PRESSURE FOR A PREDETERMINEDPERIOD5.Apparatus5.1 The apparatus3shall embody the following principles:5.1.1 The bottles to be
9、tested shall be held in such a mannerthat the bottle is not clamped,but is suspended from the beadof the finish.5.1.2 There shall be a resilient sealing member that shall actwith the sealing surface of the container to retain the pressur-izing medium during the period of the test.5.1.3 There shall b
10、e a means of applying fluid pressure to apredetermined level at a minimum rate of 69 MPa(10 000psi)/min and of maintaining that pressure constant during theperiod of test.Applied incremental fluid pressure levels shallbe provided extending over the range from 0.18 MPa(25 psi)to at least 2.41 MPa(350
11、 psi).The applied fluid pressure levelshall be reproducible to within 61%of full scale.5.1.4 An automatically controlled timing mechanism shallbe built into the apparatus so that the container will be subjectto uniform internal pressure for a predetermined period whichshall be not less than 3 s nor
12、more than 1 min(Note 1).Theperiod of test shall be reproducible within 62%.NOTE1For test durations between 3 s and 1 min,the actual pressure(PI)can be converted to the 1-min pressure(P60)calculated as follows:1These test methods are under the jurisdiction of ASTM Committee C14 onGlass and Glass Prod
13、ucts and are the direct responsibility of Subcommittee C14.07on Glass Containers.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1939.Last previous edition approved in 2010 as C147 86(2010).DOI:10.1520/C0147-86R15.2For referenced ASTM standards,visit the ASTM websit
14、e,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Single-head automatic sustained pressure testing machine developed byAmeri-can Glass Research,Inc.,Butler,PA,meets th
15、ese requirements for durations greaterthan 15 s.Detailed working drawings of this machine are available from ASTMHeadquarters.An increment pressure tester developed by the same laboratory issuitable for shorter durations.Available from ASTM International Headquarters.Order Adjunct No.ADJC0147.Copyri
16、ght ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 P605S7.9711.53logt10.69DPI(1)where t is the duration of the test in s.For instance,the actual pressurein a 3-s test would be multiplied by 0.81 in order to be equivalent tothe pressure at a test period of 1 min.6.Procedure6.1 Fill the containers with water or other low-densityliquid,if such is used as the medium for applying pressure.6.2 Use one of the following test procedures,dependingupon t
