ASTM D3122-1995(2002) Standard Specification for Solvent Cements for Styrene-Rubber (SR) Plastic Pipe and Fittings《苯乙烯橡胶塑料管及配件用溶剂粘结剂标准规范》.pdf

1、Designation: D 3122 95 (Reapproved 2002)An American National StandardStandard Specification forSolvent Cements for Styrene-Rubber (SR) Plastic Pipe andFittings1This standard is issued under the fixed designation D 3122; the number immediately following the designation indicates the year oforiginal a

2、doption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense

3、.1. Scope1.1 This specification provides general 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 t

4、o be regarded as thestandard. The values given 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 us

5、e. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:D 618 Practice for Conditioning Plastics for Testing2D 1084 Test Methods for V

6、iscosity of Adhesives3D 1600 Terminology for the Abbreviated Terms Relating toPlastics2D 2852 Specification for Styrene-Rubber (SR) Plastic DrainPipe and Fittings4F 402 Practice for Safe Handling of Solvent Cements,Primers, and Cleaners Used for Joining Thermoplastic Pipeand Fittings4F 412 Terminolo

7、gy Relating to Plastic Piping Systems4F 493 Specification for Solvent Cements for ChlorinatedPoly (Vinyl Chloride) (CPVC) Plastic Pipe and Fittings43. Terminolgy3.1 DefinitionsDefinitions are in accordance with Termi-nology F 412, and abbreviations are in accordance with Ter-minology D 1600, unless

8、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 rubber cont

9、ent 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 nitrile type o

10、r both. The combined styrene plastics andrubber content shall be not less than 90 %. No filler may beused. (See Specification D 2852.)4.2 Either virgin or clean rework material may be usedprovided that the rework material is generated from the solventcement manufacturers own production, is compatibl

11、e 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 resistance of t

12、he 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:4.5.1 Methyl

13、ethyl ketone.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.20 on Joining.Current edition approved Sept. 10, 1995. Published November 1995. Originallypublished as D 3122 72. Last previous edition D 312

14、2 95.2Annual Book of ASTM Standards, Vol 08.01.3Annual Book of ASTM Standards, Vol 15.06.4Annual Book of ASTM Standards, Vol 08.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.5.2 Toluene.NOTE 1It is recommended that solvent cem

15、ents made to this speci-fication not be orange since that color is being recommended for use withCPVC solvent cement under Specification F 493.5. 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

16、mass with toluene as the solvent,when tested in accordance with 6.3.5.2 DissolutionThe 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 minim

17、um viscosity at 23 6 2C (73.4 63.6F) shall be 90 mPas (90 cP) when tested in 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 Streng

18、th:5.4.1 The minimum lap shear strength of a cement madewith methyl ethyl ketone 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

19、 solvent when tested in accordance with 6.4shall be 1.6 MPa (230 psi) after a 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 accord

20、ance with the following methods:6.1.1 ConditioningCondition the test specimens at 23 62C (73.4 6 3.6F) for not less than 40 h prior to test inaccordance with Procedure A of Practice D 618, for those testswhere conditioning is required.6.1.2 Test ConditionsConduct tests at 23 6 2C (73.4 63.6F), unles

21、s otherwise specified in the test methods or in thisspecification.6.2 Viscosity: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.

22、2 Measure the viscosity in accordance with Method B ofTest Methods D 1084, except that conditioning to temperatureequilibrium only is required. Use a Model RVF viscometer,5aspeed of 10 r/min, and the spindle that, by trial, gives theclosest reading to center range of scale for the cement beingtested

23、.6.3 Total Solids:6.3.1 Apparatus:6.3.1.1 Ointment TinsStyle No. 12, 30 mL (1 oz) allmetal.6.3.1.2 Vacuum Oven.66.3.1.3 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 ta

24、red ointment tin. Place 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 ro

25、om temperature. Weighthe tin and dried sample to the nearest 1 mg.NOTE 4This material is usually nonhomogeneous and shall be thor-oughly stirred before weighing. The weighing shall also be accomplishedquickly to avoid loss of solvent by volatilization.NOTE 5The use of a vacuum oven is mandatory for

26、drying thespecimen because 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 definit

27、e increase inweight.6.3.3 CalculationCalculate the percentage total solids,TS, as follows:TS,%5 B 2 A!/C 2 A!3 100where: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 bestres

28、ults. Duplicate results 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 b

29、e tested for the requirement 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 c

30、loth damp-ened with the 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 sectio

31、n.5The sole source of supply of the apparatus known to the committee at this timeis Brookfield Engineering Laboratories, Stoughton, MA 02072. If you are aware ofalternative suppliers, please provide this information to ASTM InternationalHeadquarters. Your comments will receive careful consideration

32、at a meeting of theresponsible technical committee1, which you may attend.6Labline Duo-Vac vacuum oven, or equivalent, has been found satisfactory forthis purpose.D 3122 95 (2002)26.4.5 Assemble these sections immediately and rotate the 25by 25-mm (1 by 1-in.) section 180 on the 25 by 50-mm (1 by2-i

33、n.) section within 5 s using light hand pressure (approxi-mately2N(12lbf).6.4.6 Place the assembled test specimen on a clean, levelsurface, by using the 25 by 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 t

34、he 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 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

35、 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 between 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

36、, 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 megapascals (or pounds-force per square inch).NOTE 7Alternative jigs may be used if they can be shown to beequivalent.7. Retest and Rejection7.1

37、 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 purchaser and theseller. There shall be no agreement to lower the minimumrequirement of the specification by such means as omittingtests tha

38、t are a part of the specification, substituting ormodifying a test method, or by changing the specificationlimits. In retesting, the product requirements of this specifica-tion shall be met, and the test methods designated in thespecification shall be followed. If, upon retest, failure occurs,the qu

39、antity 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 cement 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

40、 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 manufacturershall certify to the purchaser or to his nominee that the productsin the specified lots meet all the requirements of this specif

41、i-cation, and when requested, shall include a copy of themanufacturers routine quality control tests results to documentthat the specification requirements have been met. Each certi-fication so furnished shall be signed by an authorized agent ofthe manufacturer.10. Container Labeling and Marking10.1

42、 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 designation: “ASTM D 3122.”10.1.3 Function of material (Cement for SR pipe.)10.1.4 Procedure or instructions for application and use.10.1.5 Lot

43、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:10.1.7.1 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 Feder

44、al Hazard-ous Substance Act.) These are intended to warn those whohandle or use the product against potential hazards, such asflammability, toxicity, etc.NOTE 8It is recommended that the color of the contents also beindicated on the label.11. Safe Handling of Solvent Cement11.1 Solvent cements for p

45、lastic 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 to minimize breathing of solvent vapors. Avoidcontact of cement with skin and eyes.11.2 Refer to Practice F 402 for additional information.

46、12. Quality Assurance12.1 When the product is marked with this designation, D3122, the manufacturer affirms that the product was manufac-tured, inspected, sampled, and tested in accordance with thisspecification and has been found to meet the requirements ofthis specification.FIG. 1 Compressive Shea

47、r SpecimenFIG. 2 Typical Specimen Holding FixtureD 3122 95 (2002)3APPENDIX(Nonmandatory Information)X1. RECOMMENDED PROCEDURE FOR JOINING STYRENE-RUBBER (SR) PLASTIC PIPE AND FITTINGS WITHSTYRENE-RUBBER SOLVENT CEMENTX1.1 Cut the pipe using a fine-tooth hand saw and a mitrebox or a fine-toothed powe

48、r 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 burrs with a knife,file, or abrasive paper.X1.2 Test fit the joint. Wipe both the outside of the

49、 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 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.X