1、-=90092b 002b03b 5b2 4Slb AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combined index,will appear in the next edition.Standard Specification for SOLVENT CEMENTS FOR CELLULOS
2、E ACETATE BUTYRATE(CAB)PLASTIC PIPE,TUBING,AND FITTINGS This standard is issued under the fixed designation D 2560;the number immediately following the designation indicates the year of original adoption or,i n the case of revision,the year of last revision.A number in parentheses indicates the year
3、 of last reapprovai.1.scope 1.1 This specification provides the general requirements for cellulose acetate butyrate(CAB)solvent cements to be used in joining cellulose acetate butyrate pipe,tubing,and fit-1.2 These solvent cements are suggested for use with CAB pipe or tubing,and fittings pro-duced
4、from Grade MH in Specification D 707,and for a Grade S not specifically covered by Specification D707.For the purposes of this specification,Grade S of CAB shali meet the requirements of Grades MS,except flow tem-perature,which shali be 135*5C(275 f 9F).This does not exclude the possibility of using
5、 these solvent cements for other grades and formulations of CAB pipe and tubing com-pounds.1.3 A recommended procedure for joining CAB pipe,tubing,and fittings with these sol-vent cements is given in Appendix X l.1.4 The values given in parentheses are for information purposes only.2.Applicable Docu
6、ments 2.1 ASTM Standards:D 6 18 Conditioning Plastics and Electrical D 638 Test for Tensile Properties of Plastics2 D 707 Specification for Cellulose Acetate Bu-tyrate Molding and Extrusion Com-pounds3 tings.Insulating Materials for Testing D 1084 Tests for Viscosity of Adhesives4 F 402 Practice for
7、 Safe Handling of Solvent Cements and Primers Used for Joining Thermoplastic Pipe and Fittings3 F 412 Definitions of Terms Relating to Plas-tic Piping Systems3 3.Defuiitions in accordance with Definitions F 412.3.1 The definitions in this specification are 4.General Requirements 4.1 The CAB solvent
8、cement shaii be a so-lution of Grade MH cellulose acetate butyrate plastic as specified in Specification D707 or Grade S described in 1.2 and one of the thin-ners described in 5.2.4.2 Rework CAB materials,generated from the manufacturers own pipe or tubing produc-tion,may be used to produce solvent
9、cement by the same manufacturer,if blended back into the same grade of virgin CAB plastic,so long as the rework material is compatible with the virgin material and the cement produced meets the requirements of this specification.4.3 The cement shall be free-flowing and shall not contain lumps,undiss
10、olved particles,or any foreign matter that will adversely affect the ultimate joint strength or chemical resist-ance of the cement.4.4 The cement shall show no gelation.It shali show no stratification or separation that cannot be removed by stirring.This specification is under the jurisdiction of AS
11、TM Committee F-17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.20 on Joining.Current edition approved Oct.31,1980.Published De-cember 1980.Originally published as D 2560-66 T.Last pre;ious edition D 2560-79.Annual Book of ASTM Standarh,Part 35.Annual Book oJASTM Sta
12、ndards,Part 34.Annual Book of ASTM Standards,Part 22.1 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.=9009276 002b037 4T9 NOTE I-It is recommended that solvent cements made to this stan
13、dard not be orange since that color is being recommended for use with CPVC solvent cement under ASTM Specification 2846,for Chlorinated Poly(Viny1 Chloride)(CPVC)Plastic Hot-and Cold-Water Distribution Systems.6.2 Viscosity:6.2.1 The samples for test shall be represent-ative of the material under co
14、nsideration.One sample for every batch shall be tested in ac-cordance with 6.2.2 unless otherwise agreed 5.Detail Requirements 5.1 Composition(weight percent)of CAB solvent cements(see 4.1)shaii be as prescribed in Table 1.5.2 Composition(weight percent)of thin-ners for preparing solvent cements pre
15、scribed in Table 1 shall be as follows:percent Thinner A:Acetone 30 Butyl acetate 50 Methyl“Celiosolve”acetate 20 Thinner B:Butyl acetate 100 Thinner C:Ac et on e 33 Y 3 Toluene 33Y Methyl“Celiosolve”acetate 3355 5.3 The recommended minimum viscosities of the solvent cements at room temperature shal
16、l be as shown in Table 2 when tested in accordance with 6.2.2.NOTE 2-Cements approaching the minimum vis-cosity requirement of this specification generally are not recommended for a noninterference-type fit(where a gap exists between the pipe and fitting socket).5.4 The minimum average lap shear strength of the joints made with the cement shall be 3.9 MPa(565 psi)after a 2-h curing time and 8.9 MPa(1285 psi)after a 16-h curing time when tested in accordance with 6.3.NOTE 3-The specified shear st
