ASTM D2924-2012 Standard Test Method for External Pressure Resistance of &ldquo Fiberglass&rdquo (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe《增强的热固树脂管抗外部压力性能的标准试验方法》.pdf
《ASTM D2924-2012 Standard Test Method for External Pressure Resistance of &ldquo Fiberglass&rdquo (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe《增强的热固树脂管抗外部压力性能的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2924-2012 Standard Test Method for External Pressure Resistance of &ldquo Fiberglass&rdquo (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe《增强的热固树脂管抗外部压力性能的标准试验方法》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2924 01(Reapproved 2006) D2924 12 An American National StandardStandard Test Method forExternal Pressure Resistance of “Fiberglass”(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe1This standard is issued under the fixed designation D2924; the number immediately following the designati
2、on indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers determinat
3、ion of the resistance of fiberglass pipe to external pressure. It classifies failures asbuckling, compressive, and leaking. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforcedpolymer mortar pipe (RPMP) are fiberglass pipes.NOTE 1For the purposes of this standard, p
4、olymer does not include natural polymers.1.2 The values stated in inch-pound units are to be regarded as standard. The SI units given in parentheses are for informationonly.NOTE 2There is no similar or equivalent ISO standard.1.3 This standard does not purport to address all of the safety concerns,
5、if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesD618 Pr
6、actice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating to PlasticsF412 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Definitions:3.1.1 Definitions are in accordance with Terminology D883 or F412 and abbrevia
7、tions are in accordance with TerminologyD1600, unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 aggregate, na siliceous sand conforming to the requirements of Specification C33, except that the requirements forgradation shall not apply.3.2.2 buckling failure pressu
8、re the external gage pressure at which buckling occurs. Buckling is characterized by a sharpdiscontinuity in the pressure-volume change graph and subsequent fracture in the test specimen appearing as an axially orientedcrack. Buckling is an elastic instability type of failure and is normally associa
9、ted with thin-wall pipe.3.2.3 compressive failure pressurethe maximum external gage pressure that the specimen will resist without transmission ofthe testing fluid through the wall. Compressive failure pressure will not be associated with a sharp discontinuity in thepressure-volume change graph nor
10、lead to a fracture appearing as a sharp axially oriented crack. It will appear as a fracture whichis the result of reaching the compressive strength limits of the material and is normally associated with thick-wall pipe. Failureis usually identified by a sudden drop in pressure.3.2.4 fiberglass pipe
11、, na tubular product containing glass fiber reinforcements embedded in or surrounded by curedthermosetting resin; the composite structure may contain aggregate, granular, or platelet fillers, thixotropic agents, pigments, ordyes; thermoplastic or thermosetting liners or coatings may be included.3.2.
12、5 leaking pressurethe external gage pressure at which the test fluid is transmitted through the pipe wall. It is characterizedin this test by continuous volume change indications with no pressure increase.3.2.6 reinforced polymer mortar pipe (RPMP), na fiberglass pipe with aggregate.*A Summary of Ch
13、anges section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.7 reinforced thermosetting resin pipe (RTRP), na fiberglass pipe without aggregate.4. Summary of Test Method4.1 This test method cons
14、ists of loading a specimen to failure in a short time interval by means of continuouslyincrementallyincreasing external fluid pressure at a controlled constant temperature. Fluid is also maintained inside the pipe, and changes in theinside volume are monitored with a bleed hole and fluid level tube.
15、 On Cartesian coordinates, pressure versus change in volumeis plotted and the failure pressure selected as indicated by the graph. Scaling constants are presented for extending the results toother diameters.5. Significance and Use5.1 The values obtained by this test method are applicable only to con
16、ditions that specifically duplicate the procedures used.5.2 After a scaling constant is determined for one diameter, this may be used for calculating the external failure pressures ofother diameters as long as the resin and reinforcement (if used), the wall thickness-to-diameter ratio, and the reinf
17、orcement pattern(if reinforcement is used) are the same.NOTE 3Based upon tests conducted on one size of pipe, a scaling constant is calculated according to 11.110.1 or 11.210.2. The appropriate constantis used to calculate failure pressure for other pipe diameters, but it can only be applied if the
18、same resin and reinforcement are used, the wall thicknessto diameter ratios are similar, and the reinforcement pattern is constant.5.3 In the application of the following test requirements and recommendations, care must be exercised to ensure that thespecimens tested are truly representative of the
19、group being studied.6. Apparatus (see Figs. 1 and 2)1 This test method is under the jurisdiction of ASTM Committee D20 on Plastics,Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced PlasticPiping Systems and Chemical Equipment.Current edition approved Sept. 15, 2006Oct. 1
20、, 2012. Published September 2006November 2012. Originally approved in 1970. Last previous edition approved in 20012006as D2924 01.D2924 01 (2006). DOI: 10.1520/D2924-01R06.10.1520/D2924-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serv
21、iceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.FIG. 1 Apparatus Showing Specimen Loading with Both Hoop and Axial LoadsD2924 1226.1 Test ChamberAn external chamber capable of withstanding pressures to be encountered.
22、 It may be either the type thatapplies both hoop and axial loads as shown in Fig. 1 or the type that applies hoop load only as shown in Fig. 2. In either event,the report shall state which type loading was used for test.6.2 Volume or Weight Change IndicatorThe specimen shall be instrumented to measu
23、re changes in volume or weight. Oneof the following two devices shall be used.weight by use of a balance accurate to within 60.1 g.6.2.1 Transparent Tubeconnected to the test specimen so that the volume changes of the specimen result in changes in thelevel of fluid in the tube. A scale shall be affi
24、xed to the tube so variations in fluid level can be recorded. Absolute measurementof volume change is not required.6.2.2 ScaleA balance accurate to within 60.1 g.6.3 Pressurizing SystemA device capable of exerting external fluid pressure to the specimen at a specified constant rate. ABourdon-tube pr
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