1、Designation: C 600 85 (Reapproved 2005)Standard Test Method ofThermal Shock Test on Glass Pipe1This standard is issued under the fixed designation C 600; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 Since thermal shock resistance is so closely related tothe linear coefficient of expansion, this test method for thedetermination of t
3、he thermal shock resistance of glass processpipe is primarily intended to supplement test results on thelinear coefficient of expansion, Test Method E 228. Thisthermal shock test will not ordinarily be performed except inthose cases where the thermal shock resistance may bequestioned.1.2 This test m
4、ethod covers only two of four thermal shockpossible approaches, namely independent downshock of out-side and inside pipe surfaces. Downshock is more severe sincea higher tensile stress is produced and, hence, more likely toproduce failure.1.3 This standard does not purport to address all of thesafet
5、y 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:E 228 Test Method for Linear Therm
6、al Expansion of SolidMaterials with a Vitreous Silica Dilatometer23. Significance and Use3.1 This test method provides a practical means of assessingglass pipe strength under short-duration, thermally-imposedtensile stresses. In addition to a principal role played by thelinear coefficient of thermal
7、 expansion, glass surface defectscan also be major factors in reducing downshock performance.4. Apparatus4.1 Oven, equipped with a device to maintain the tempera-ture with 65F (63C) of the specified temperature. Anindicating controller is recommended. Otherwise, a dial ther-mometer should be attache
8、d and the temperature controlledmanually.4.2 Water Tank, at least 18 in. (457 mm) deep with a widthand length sufficient to accommodate the samples to be tested.The tank shall be filled with ice water to a depth of at least 12in. (305 mm). The water temperature shall be maintained at 346 2F (1 6 1C)
9、.4.3 Timer, capable of measuring seconds.5. Sampling5.1 Arandom sampling of 1 % (but not less than two pieces)of pipe and fittings shall be made.6. Procedure6.1 Set the oven at the proper temperature, in degreesFahrenheit, determined as follows:Toven5 32 1 1.25 8DTrecommended! (1)6.2 Thermal Shock T
10、estOutside SurfaceClose off allopen ends of sample; use glass pipe caps or flat metal plates,plus the necessary flanges, gaskets, inserts, nuts, and bolts.Keep the closed sample in the oven, at temperature, for at least30 min. Completely submerge the sample in the tank of icewater for 30 s. Keep the
11、 time elapsed between removing thesample from the oven and submerging it in ice water not lessthan 15 s, nor more than 45 s. Inspect each sample forindications of failure.6.3 Thermal Shock TestInside SurfaceClose off all openends of sample except one; use glass pipe caps or flat metalplates, plus th
12、e necessary flanges, gaskets, inserts, nuts, andbolts. Keep the partially closed sample in the oven, at tempera-ture, for at least 30 min. Remove the sample from the oven,placing the one open end up. Pour ice water into the open endof the sample to overflowing. Keep the time elapsed between1This tes
13、t method is under the jurisdiction of ASTM Committee C14 on Glassand Glass Products and is the direct responsibility of Subcommittee C14.05 onGlass Pipe.Current edition approved Sept. 1, 2005. Published October 2005. Originallyapproved in 1967. Last previous edition approved in 2000 as C 600 85 (200
14、0).2Withdrawn.TABLE 1 Oven Temperature SettingNominal Pipe Size,in.TovenF C14 282 14038 282 14012 282 14034 282 1401 282 140112 282 1402 282 1403 282 1404 251 1226 232 1111Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.the removal of
15、 the sample from the oven and the beginning ofthe time to pour the water to no less than 15 s and no more than45 s. Pour water into the sample at a rate such that the sampleshall be filled within 1 min from the start of the pouring.NOTE 1For tests in 6.1 through 6.3 the same sample(s) may be usedfor
16、 inside and outside surfaces (unless the sample fails one of the twotests).7. Report7.1 Report the following:7.1.1 Sampling percentage,7.1.2 Number, size, and description of each sample tested,7.1.3 Time of transfer used,7.1.4 Temperature differential used, and7.1.5 Results of test:7.1.5.1 For the o
17、utside surface thermal shock test, numberof samples that failed, and7.1.5.2 For the inside surface thermal shock test, number ofsamples that failed.8. Precision and Bias8.1 Due to the fail-pass nature of the test, statements onprecision and bias are not applicable.9. Keywords9.1 glass; pipe; thermal
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19、s, 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 andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional s
20、tandardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a 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 C
21、ommittee 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).C 600 85 (2005)2
