1、Designation: F493 10F493 14 An American National StandardStandard Specification forSolvent Cements for Chlorinated Poly(Vinyl Chloride)(CPVC) Plastic Pipe and Fittings1This standard is issued under the fixed designation F493; the number immediately following the designation indicates the year of ori
2、ginaladoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of D
3、efense.1. Scope*1.1 This specification provides requirements for chlorinated poly(vinyl chloride) (CPVC) solvent cements to be used in joiningchlorinated poly(vinyl chloride) pipe, tubing, and socket-type fittings.1.2 CPVC solvent cements are used with CPVC 41 chlorinated poly(vinyl chloride) pipe,
4、tubing, and fittings, which meet Class23447 as defined in Specification D1784.1.3 A recommended procedure for joining CPVC pipe and fittings is given in Appendix X1.1.4 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notesand footn
5、otes (excluding those in tables and figures) shall not be considered as requirements of the specification.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are n
6、ot considered standard.1.6 The following safety hazards caveat pertains only to the test methods portion, Section 6, of this specification: This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to es
7、tablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1084 Test Methods for Viscosity of AdhesivesD1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal PressureD1599 T
8、est Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and FittingsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC)CompoundsD2846/D2846M Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot- a
9、nd Cold-Water Distribution SystemsF402 Practice for Safe Handling of Solvent Cements, Primers, and Cleaners Used for Joining Thermoplastic Pipe and FittingsF412 Terminology Relating to Plastic Piping SystemsF439 Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedu
10、le 802.2 NSF Standards:Standard No. 14 for Plastic Piping Components and Related Materials3Standard No. 61 for Drinking Water Systems ComponentsHealth Effects33. Terminology3.1 DefinitionsThe definitions in this specification are in accordance with Terminology F412.4. General Requirements4.1 The sol
11、vent cement shall be a solution of the base CPVC resin used to make Class 23447, chlorinated poly(vinyl chloride)molding or extrusion compound as defined in Specification D1784.1 This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibi
12、lity of Subcommittee F17.20 on Joining.Current edition approved Aug. 1, 2010Nov. 1, 2014. Published September 2010December 2014. Originally approved in 1977. Last previous edition approved in 20042010as F493 04.F493 10. DOI: 10.1520/F0493-10.10.1520/F0493-14.2 For referencedASTM standards, visit the
13、ASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, htt
14、p:/www.nsf.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users co
15、nsult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
16、n, PA 19428-2959. United States14.2 When rework material is used, the manufacturer shall use only his own clean rework material that is compatible with virginmaterial and produces a cement that meets the requirements of this specification.4.3 The cement shall be free-flowing and shall not contain lu
17、mps, undissolved resin, or any foreign matter that will adverselyaffect the ultimate joint strength or chemical resistance of the cement.4.4 The cement shall show no gelation or stratification that cannot be removed by stirring.4.5 When inert fillers and colorants are added, the resulting cement sha
18、ll meet all requirements of this specification.NOTE 1It is recommended that CPVC solvent cement be orange in color to facilitate identification and minimize unintentional use of other cementsthat may fail at elevated service temperatures.4.6 The particular solvent system to be used in the formulatio
19、n of this solvent cement is not specified, since it is recognized thata number of adequate solvent systems for CPVC exist. Solvent systems consisting of blends of tetrahydrofuran and cyclohexanonehave been found to make cements that meet the requirements of this specification.5. Detail Requirements5
20、.1 Resin ContentThe CPVC resin content shall be 10 % minimum when tested in accordance with 6.1.5.2 DissolutionThe cement shall be capable of dissolving an additional 3 % by weight of CPVC 41 compound (either powderor granular) or equivalent CPVC resin at 73 6 3.6F (23 6 2C) without evidence of gela
21、tion.5.3 ViscosityCements are classified as regular-, medium-, or heavy-bodied types, based on their minimum viscosity whentested in accordance with 6.2.5.3.1 Regular-bodied cements shall have a minimum viscosity of 90 cP (90 MPas).5.3.2 Medium-bodied cements shall have a minimum viscosity of 500 cP
22、 (500 MPas).5.3.3 Heavy-bodied cements shall have a minimum viscosity of 1600 cP (1600 MPas).NOTE 2Refer to Appendix X2 for guidelines in selecting CPVC solvent cements for joining different pipe sizes.5.4 Shelf StabilityThe cement, in the container in which it is supplied, shall show no gelation or
23、 stratification that cannot beremoved by stirring after aging 30 days at 120F (49C).5.5 Hydrostatic Burst StrengthJoints made using 2-in. (63 mm) CPVC piping and this cement shall meet the requirements ofTable 1 when tested in accordance with 6.3.5.6 Hydrostatic Sustained Pressure StrengthJoints mad
24、e using 12-in. CPVC tubing and this cement shall meet therequirements of Table 2 when tested in accordance with 6.4.6. Test Methods6.1 Solid Contents:6.1.1 Apparatus:6.1.1.1 Ointment Tins, Style No. 12, 1-oz (30-mL), all metal,6.1.1.2 Analytical Balance,6.1.1.3 Vacuum Oven,6.1.1.4 Desiccator, and6.1
25、.1.5 Centrifuge.6.1.2 ProcedureStir the sample thoroughly with a spatula before weighing (Note 3). Weigh 0.106 6 0.123 oz (3.0 6 0.5 g)of the sample to the nearest 3.53 10-5 oz (1 mg) into a tared ointment tin with cover. Place the tin into the vacuum oven (Note4), and heat at 248F (120C) for 45 to
26、60 min. Discard specimens left in for more than 60 min. The vacuum must be continuallyTABLE 1 Minimum Hydrostatic Burst Strength Requirements forNominal 2 in. CPVC Solvent-Cemented Joints After 2 h Drying atTest TemperatureTemperature, F (C) Burst Pressure, psi (MPa)73 (23) 2.76 (400)180 (82) 1.38 (
27、200)TABLE 1 Minimum Hydrostatic Burst Strength Requirements forNominal 2 in. CPVC Solvent-Cemented Joints After 2 h Drying atTest TemperatureTemperature, F (C) Burst Pressure, psi (MPa)73 (23) 400 (2.76)180 (82) 200 (1.38)F493 142in operation to draw off flammable solvents and shall be maintained be
28、low 0.29 psi (15 mm Hg) pressure. Remove the tin fromthe oven and cap immediately. Place in a desiccator until cooled to room temperature. Weigh the tin and dried sample to the nearest3.53 10-5 oz (1 mg).NOTE 3This material is usually nonhomogeneous and shall be thoroughly stirred before weighing. T
29、he weighing shall also be accomplished quicklyto avoid loss of solvent by evaporation.NOTE 4The use of a vacuum oven is mandatory for drying the specimen, because this oven has neither an exposed heating surface nor an open flame,thus avoiding the danger of flashing. The oven also provides an open v
30、acuum to exhaust solvent fumes.6.1.3 Inert Filler DeterminationDissolve most of the dried sample by adding 0.507 oz (15 mL) of tetrahydrofuran (THF) tothe sample in the ointment tin and stirring with a glass rod for 15 min. Collect the liquid decanted from this step, plus the liquidfrom the next two
31、 steps. Dissolve the remainder with a second addition of 0.507 oz (15 mL) of THF, followed by a third additionof 0.17 oz (5 mL) of THF to rinse the ointment tin. Centrifuge the entire volume at 20 000 rpm for 15 min. Discard the supernatantliquid. Add 0.507 oz (15 mL) of THF to the tube, mix thoroug
32、hly, and transfer the tube contents to the ointment tin. Use 6.76 10-2 (2 mL) more of THF to wash down the tube, and pour into the ointment tin. Evaporate off the THF in the vacuum oven at 248F(120C) for 45 min. Cool in desiccator, weigh the tin to the nearest 3.53 10-5 oz (1 mg), and determine the
33、weight of inert fillerpresent in the cement.6.1.4 CalculationCalculate the percentage of CPVC resin as follows:Resin,%5B 2 A 2 D!/C 2 A!3100where:A = weight of ointment tin,B = weight of tin and specimen after drying,C = weight of tin and specimen before drying, andD = weight of inert filler, if pre
34、sent.NOTE 5Other methods for determination of resin and inert filler content may be used provided that the results of the alternative method are as accurateand consistent as the above method.6.2 Viscosity:6.2.1 Measure the viscosity in accordance with Method B of Test Methods D1084, except that cond
35、itioning to temperatureequilibrium only is required. For qualification purposes, use a Model RVF viscometer, a speed of 10 r/min, and the spindle that,by trial, gives the closest reading to center range of scale for the cement being tested. Other speeds may be used for quality controlpurposes.6.3 Hy
36、drostatic Burst Strength:6.3.1 Test in accordance with Test Method D1599, except as herein specified.6.3.2 Prepare a test assembly containing at least six nominal 2-in. (63 mm) solvent-cemented joints using CPVC 41 SDR 11pipe and fittings meeting the requirements of Specification D2846/D2846M. Cut t
37、he pipe into suitable lengths. The socket depthof the fittings shall be 112 to 1916 in. (38.1 to 38.50 mm) (Schedule 80 in accordance with Specification F439).6.3.3 The dimensions of the pipe and fitting socket shall be such that the pipe will enter the socket from one third to two thirdsof the full
38、 socket depth dry when assembled by hand.6.3.4 Cement the joints in accordance with the recommended solvent cementing procedure given in Appendix X1 except forX1.7.6.3.5 Attach suitable end closures and fill the test assembly with water, purging all air, and condition in water or air at the testtemp
39、erature for 120 6 5 min, then test immediately.6.3.6 Increase the internal pressure at a constant rate so as to reach the minimum burst requirement in 60 to 70 s.6.3.7 Leakage or separation at any of the joints tested at less than the minimum hydrostatic burst strength requirements specifiedin Table
40、 1 shall constitute failure in this test.6.4 Hydrostatic Sustained Pressure Strength:6.4.1 Test in accordance with Test Method D1598, except as herein specified.6.4.2 Prepare a test assembly containing six nominal 12-in.(15.24 cm) solvent-cemented joints using CPVC 41 SDR 11 tubingand fittings meeti
41、ng the requirements of Specification D2846/D2846M. Cut the tubing into 6-in. lengths and use two couplings andtwo male adapters.TABLE 2 Minimum Hydrostatic Sustained Pressure Requirementsfor Nominal 12 in. CPVC Solvent-Cemented Joints Tested inWater or Air External Environment at 180 3.6F (82 2C)Tes
42、tCondition Test DurationHydrostatic Test Pressure, psi (MPa)Water Bath Air BathA 6 min 521(3.59)551(3.80)B 4 h 364(2.51)403(2.78)F493 1436.4.3 The dimensions of the tubing and fitting socket shall be such that the tubing will enter the socket from one third to twothirds of the full socket depth dry
43、when assembled by hand.6.4.4 Prepare the pipe and fittings for joining in accordance with X1.1, X1.2 and X1.3 of the recommended solvent cementingprocedure given in Appendix X1. Do not apply cleaner or primer and do not sand. Apply a very light coat of CPVC cement tothe socket and a heavy coat to th
44、e pipe end. Immediately insert the pipe into the fitting with a slight twisting motion until it bottomsin the socket. Hold the joint together until the cement has set. Remove any excess cement from the joint.NOTE 6The purpose of the test method is to evaluate the performance of the CPVC cement alone
45、, and therefore applying cleaner or primer or sanding,in accordance with X1.4, is not required for this purpose.6.4.5 Dry the solvent-cemented joints in air at 73.4 6 3.6F (23 6 2C) for 336 6 2 hr. Then dry the solvent-cememted jointsat 180 6 3.5F (82 6 2C) for 48 6 2 hr.6.4.6 Attach suitable end cl
46、osures and fill the test assembly with water, purging all air, and condition at the test temperature for30 6 5 min if using a water bath or 120 6 5 min if using an air bath, then test immediately.6.4.7 Attach to pressure source and place on test at 180F (82C) and the proper hydrostatic pressure 610
47、psi (670 kPa) asspecified in Table 2. Increase the internal pressure at a constant rate to reach the test pressure in 15 to 20 s.6.4.8 Leakage or separation at any of the joints tested at less than the test duration time specified in Table 2 for both testconditions A and B shall constitute failure i
48、n this test.7. Retest and Rejection7.1 If the results of any test(s) do not meet the requirements of this specification, the test(s) shall be conducted again only byagreement between the purchaser and the seller. Under such agreement, minimum requirements shall not be lowered, nor testsomitted, subs
49、tituted, changed, or modified, nor shall specification limits be changed. If upon retest, failure occurs, the quantity ofproduct represented by the test(s) does not meet the requirements of this specification.8. Report8.1 Report the following information:8.1.1 Name of cement manufacturer,8.1.2 Lot number or sample identification,8.1.3 Resin content, %,8.1.4 Dissolution, pass or fail,8.1.5 Viscosity,8.1.6 Shelf stability, pass or fail,8.1.7 Hydrostatic burst strength, and8.1.8 Hydrostatic sustained pressure strength, te
