1、Designation: D3122 15Standard Specification forSolvent Cements for Styrene-Rubber (SR) Plastic Pipe andFittings1This standard is issued under the fixed designation D3122; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 Defense.1. Scope*1.1 This specification provides gen
3、eral requirements forstyrene-rubber solvent cements to be used in joining styrene-rubber (SR) plastic pipe and fittings.1.2 A recommended procedure for joining styrene-rubberpipe and fittings is given in the appendix.1.3 The values stated in SI units are to be regarded as thestandard. The values giv
4、en in parentheses are for informationonly.1.4 The following safety hazards caveat pertains only to thetest methods portion, Section 6, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof th
5、is standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1084 Test Methods for Viscosity of AdhesivesD1600 Terminology forAbbr
6、eviated Terms Relating to Plas-ticsD2852 Specification for Styrene-Rubber (SR) Plastic DrainPipe and FittingsE1953 Practice for Description of Thermal Analysis andRheology ApparatusF402 Practice for Safe Handling of Solvent Cements,Primers, and Cleaners Used for Joining ThermoplasticPipe and Fitting
7、sF412 Terminology Relating to Plastic Piping SystemsF493 Specification for Solvent Cements for ChlorinatedPoly(Vinyl Chloride) (CPVC) Plastic Pipe and Fittings3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F412, and abbreviations are in accordance with Termi-nology D160
8、0, unless otherwise specified.4. General Requirements4.1 The solvent cement shall be a solution of styrene-rubber(SR) plastic compound or resin meeting the following require-ments.4.1.1 The SR plastic compounds or resin shall contain atleast 50 % styrene plastics, combined with rubbers to aminimum r
9、ubber content of 5 %, and compounding materialssuch as antioxidants and lubricants, and may contain up to15 % acrylonitrile combined in the styrene plastics or rubbers,or both. The rubbers shall be of the polybutadiene or butadiene-styrene type, or both, with a maximum styrene content of 25 %or nitr
10、ile type or both. The combined styrene plastics andrubber content shall be not less than 90 %. No filler may beused. (See Specification D2852.)4.2 Either virgin or clean rework material may be usedprovided that the rework material is generated from the solventcement manufacturers own production, is
11、compatible withvirgin material, and will produce a cement that meets therequirements of this specification.4.3 The cement shall be free-flowing and shall not containlumps, macroscopic undissolved particles, or any foreignmatter that will adversely affect the ultimate joint strength orchemical resist
12、ance of the cement.4.4 The cement shall show no gelatin. It shall show nostratification or separation that cannot be removed by stirring.4.5 The cement shall be a solution of styrene-rubber (SR)plastic compound or resin meeting the requirements of 4.1.1dissolved in one of the following solvents:4.5.
13、1 Methyl ethyl ketone.4.5.2 Toluene.NOTE 1It is recommended that solvent cements made to this speci-fication not be orange since that color is being recommended for use with1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility o
14、f Subcommittee F17.20 on Joining.Current edition approved Aug. 1, 2015. Published August 2015. Originallyapproved in 1972. Last previous edition approved in 2009 as D3122 95 (2009).DOI: 10.1520/D3122-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Ser
15、vice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
16、-2959. United States1CPVC solvent cement under Specification F493.5. Detail Requirements5.1 Resin ContentThe SR resin compound shall be 20 %minimum by mass with methyl ethyl ketone as the solvent orshall be 15 % minimum by mass with toluene as the solvent,when tested in accordance with 6.3.5.2 Disso
17、lutionThe cement shall be capable of dissolvingan additional 10 % by mass of styrene-rubber (SR) resin orcompound meeting the requirements of 4.1.1 at 23 6 2C (73.46 3.6F) without evidence of gelation.5.3 ViscosityThe minimum viscosity at 23 6 2C (73.4 63.6F) shall be 90 mPas (90 cP) when tested in
18、accordancewith 6.2.NOTE 2Cements approaching the minimum viscosity of this specifi-cation generally are not recommended for noninterference-type fit (wheregap exists between the pipe and fitting socket).5.4 Lap Shear Strength:5.4.1 The minimum lap shear strength of a cement madewith methyl ethyl ket
19、one as the solvent when tested inaccordance with 6.4 shall be 3.5 MPa (500 psi) after a 16-hcuring time and 6.0 MPa (900 psi) after a 48-h curing time.5.4.2 The minimum lap shear strength of a cement madewith toluene as the solvent when tested in accordance with 6.4shall be 1.6 MPa (230 psi) after a
20、 16-h curing time and 2.4 MPa(350 psi) after a 48-h curing time.NOTE 3These values should not be used for designing pipe joints.6. Test Methods6.1 The properties enumerated in this specification shall bedetermined in accordance with the following methods:6.1.1 ConditioningCondition the test specimen
21、s at 23 62C (73.4 6 3.6F) for not less than 40 h prior to test inaccordance with Procedure A of Practice D618, for those testswhere conditioning is required.6.1.2 Test ConditionsConduct tests at 23 6 2C (73.4 63.6F), unless otherwise specified in the test methods or in thisspecification.6.2 Viscosit
22、y:6.2.1 The samples for test shall be representative of thematerial under consideration. One sample for every batch shallbe tested in accordance with 6.2.2 unless otherwise agreedupon by the supplier and the purchaser.6.2.2 Measure the viscosity in accordance with Method B ofTest Methods D1084, exce
23、pt that conditioning to temperatureequilibrium only is required. Use rotational viscometer with afull scale torque reading of 0.7 mN-m (see E1953), a speed of10 r/min, and the spindle that, by trial, gives the closest readingto center range of scale for the cement being tested.6.3 Total Solids:6.3.1
24、 Apparatus:6.3.1.1 Ointment TinsStyle No. 12, 30 mL(1 oz) all metal.6.3.1.2 Vacuum Oven.6.3.1.3 Desiccator.6.3.1.4 Analytical Balance.6.3.2 ProcedureStir the sample thoroughly with a spatulabefore weighing (Note 4). Weigh 3.0 6 0.5 g of the sample tothe nearest 1 mg into a tared ointment tin. Place
25、tin into thevacuum oven (Note 5) and heat at 120C for 45 min (Note 6).Vacuum must be continually in operation to draw off flam-mable solvents and should be maintained at 15 mm Hgmaximum. Remove the tin from the oven and cap immediately.Place in a desiccator until cooled to room temperature. Weighthe
26、 tin and dried sample to the nearest 1 mg.NOTE 4This material is usually nonhomogeneous and shall bethoroughly stirred before weighing. The weighing shall also be accom-plished quickly to avoid loss of solvent by volatilization.NOTE 5The use of a vacuum oven is mandatory for drying thespecimen becau
27、se this oven has no exposed heating surface nor an openflame, thus avoiding the danger of flashing. The oven also provides anopen vacuum to exhaust solvent fumes.NOTE 6The specimen shall be left in the oven for 45 min and nolonger. Specimens left in for1hormore show a definite increase inweight.6.3.
28、3 CalculationCalculate the percentage total solids,TS, as follows:TS,%5 B 2 A!/C 2 A! 3100where:A = weight of ointment tin,B = weight of tin and specimen after drying, andC = weight of tin and specimen before drying.6.3.4 PrecisionDuplicate samples shall be tested for bestresults. Duplicate results
29、obtained by the same analyst, on thesame material, on the same day, in the same laboratory aresuspect if they differ by more than 0.52 % absolute. Thisprocedure has a standard deviation of 0.13.6.4 Lap Shear Strength:6.4.1 Number of SpecimensA minimum of five specimensshall be tested for the require
30、ment specified in 5.4.6.4.2 Cut 25 by 25-mm (1 by 1-in.) and 25 by 50-mm (1 by2-in.) sections from a 6-mm (14-in.) thick rigid styrene-rubberplastic (SR) sheet. One section of each size is required for eachtest specimen (Fig. 1).6.4.3 Clean the surfaces to be adhered with a cloth damp-ened with the
31、solvent (see 4.5) used to make the solventcement.6.4.4 Using a 25-mm (1-in.) natural bristle brush, apply twolayers of cement in immediate succession to the completesurface of a 25 by 25-mm (1 by 1-in.) sheet section and to thecenter of a 25 by 50-mm (1 by 2-in.) sheet section.FIG. 1 Compressive She
32、ar SpecimenD3122 1526.4.5 Assemble these sections immediately and rotate the 25by 25-mm (1 by 1-in.) section 180 on the 25 by 50-mm (1 by2-in.) section within 5 s using light hand pressure (approxi-mately2N(12 lbf).6.4.6 Place the assembled test specimen on a clean, levelsurface, by using the 25 by
33、50-mm (1 by 2-in.) section as abase. After 30 s, place a 2-kg weight on the test specimen fora period of 3 min, and then remove.6.4.7 Store the assembled test specimens at 23 6 2C (73.46 3.6F) for 16-h or 48-h and test them in a holding fixturesimilar to that shown in Fig. 2.6.4.8 Place the specimen
34、 in the holding fixture and adjustthe screws to bring the sample to a vertical position with theface of the 50-mm (2-in.) specimen in contact with the test jigas shown in Fig. 2 (Note 7). Back off the screw in contact withthe 50-mm (2-in.) specimen until a 0.02-mm (0.001-in.) shimcan be inserted bet
35、ween the screw plate and the specimen.Then bring the bearing plate of the test machine into contactwith the top of the 50-mm (2-in.) specimen, using care toensure that the plate is on a horizontal plane.6.4.9 Apply the compressive shear at a speed of 1.25 mm(0.05 in.)/min. Express the results in meg
36、apascals (or pounds-force per square inch).NOTE 7Alternative jigs may be used if they can be shown to beequivalent.7. Retest and Rejection7.1 If the results of any test(s) do not meet the requirementsof this specification, the test(s) may be conducted again inaccordance with an agreement between the
37、 purchaser and theseller. There shall be no agreement to lower the minimumrequirement of the specification by such means as omittingtests that are a part of the specification, substituting ormodifying a test method, or by changing the specificationlimits. In retesting, the product requirements of th
38、is specifica-tion shall be met, and the test methods designated in thespecification shall be followed. If, upon retest, failure occurs,the quantity of product represented by the test(s) does not meetthe requirements of this specification.8. Report8.1 Report the following information:8.1.1 Name of ce
39、ment manufacturer,8.1.2 Lot number, if given,8.1.3 Total solids, in percent,8.1.4 Dissolution, pass or fail,8.1.5 Viscosity, and8.1.6 Average lap shear strength at each cure time andcomplete identification of SR sheet stock used for tests.9. Certification9.1 When specified in the purchase order, the
40、 manufacturershall certify to the purchaser or to his nominee that the productsin the specified lots meet all the requirements of thisspecification, and when requested, shall include a copy of themanufacturers routine quality control tests results to documentthat the specification requirements have
41、been met. Each certi-fication so furnished shall be signed by an authorized agent ofthe manufacturer.10. Container Labeling and Marking10.1 Container labeling of cement shall include the follow-ing:10.1.1 Manufacturers or suppliers name and address andtradename or trademark or both.10.1.2 This desig
42、nation: “ASTM D3122.”10.1.3 Function of material (Cement for SR pipe.)10.1.4 Procedure or instructions for application and use.10.1.5 Lot number of batch on container (not on closure orlid).10.1.6 End use application (example: nonpressure uses).10.1.7 All warnings and cautions necessitated by:10.1.7
43、.1 Ingredients,10.1.7.2 Handling and distribution of the product,10.1.7.3 Intended use, and10.1.7.4 Requirements of law (such as the Federal Hazard-ous Substance Act.) These are intended to warn those whohandle or use the product against potential hazards, such asflammability, toxicity, etc.NOTE 8It
44、 is recommended that the color of the contents also beindicated on the label.11. Safe Handling of Solvent Cement11.1 Solvent cements for plastic pipe are made from flam-mable liquids and should be kept away from all sources ofignition. Good ventilation should be maintained to reduce firehazard and t
45、o minimize breathing of solvent vapors. Avoidcontact of cement with skin and eyes.11.2 Refer to Practice F402 for additional information.12. Quality Assurance12.1 When the product is marked with this designation,D3122, the manufacturer affirms that the product wasmanufactured, inspected, sampled, an
46、d tested in accordancewith this specification and has been found to meet therequirements of this specification.FIG. 2 Typical Specimen Holding FixtureD3122 153APPENDIX(Nonmandatory Information)X1. RECOMMENDED PROCEDURE FOR JOINING STYRENE-RUBBER (SR) PLASTIC PIPE AND FITTINGS WITHSTYRENE-RUBBER SOLV
47、ENT CEMENTX1.1 Cut the pipe using a fine-tooth hand saw and a mitrebox or a fine-toothed power saw with a suitable guide. Use arotary cutter if the cutting blades are specially designed forcutting plastic in such a way as not to raise a burr or ridge(flare) at the cut end of the pipe. Remove all bur
48、rs with a knife,file, or abrasive paper.X1.2 Test fit the joint. Wipe both the outside of the pipe andthe inside of the fitting socket with a clean, dry cloth to removemoisture and foreign matter. Mate the two parts withoutforcing. The pipe should enter the socket one quarter to threequarters of the
49、 socket depth. Avoid very tight fits (pipe will notenter socket without forcing) and loose fits (pipe bottoms easilyin socket with slop).X1.3 Surfaces to be joined should be clean and free ofmoisture before application of the cement. Apply a cleaner ifrecommended by the cement manufacturer to the matingsurfaces of the pipe and fitting.X1.4 Apply the cement with a 1-in. natural bristle or nylonbrush for pipe sizes up to 2 in. and a brush width at least onehalf of the pipe diameter for the larger size pipe. Otherapplicators may be used effe
