1、Designation:D314706(Reapproved 2013)Standard Test Method for TestingStop-Leak Additives for Engine Coolants1This standard is issued under the fixed designation D3147;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.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.Scope1.1 This test method covers screening procedures
3、for thepreliminary evaluation of leak-stopping materials intended foruse in engine cooling systems.(Heavy-duty users are referredto X1.2.21 in Specification D4485 for additional information.)1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for i
4、nformationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Spe
5、cific warningstatements are given in 10.1.2.Referenced Documents2.1 ASTM Standards:2D1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Coolants orAntirusts for Testing Purposes3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 leakingfrequent drops forming(more
6、 than 5 drops/min).3.1.2 sealedcompletely plugged with no leaking or seep-ing.3.1.3 seepingoccasional drops forming(fewer than 5drops/min).4.Summary of Test Method4.1 Aheated test solution is circulated through a pressurizedcubical metal reservoir which contains a slit and holes tosimulate leaks in
7、an engine cooling system.The effectivenessof the stop-leak material is measured by its ability to seal theleaks under the prescribed conditions of flow rate,temperature,pressure,and time.4.2 The presence of particles in the test material that arelarger than 0.84 mm(0.033 in.)or the presence of gummi
8、ng orgelling in stop-leak additives is determined by screening a testsolution through a 850-m(U.S.No.20)standard sieve.Thescreening is done both before and after the circulating test.Particles that remain on the sieve may be too large to passthrough some passages of the cooling system.5.Significance
9、 and Use5.1 The screening procedures simulate the conditions oftemperature,pressure,and circulation encountered in service.This test method will indicate whether a product is suitable forfurther evaluation in vehicles.6.Apparatus(See Fig.1)6.1 Reservoir:6.1.1 The reservoir shall be constructed of st
10、ainless steel,aluminum,or brass,260 by 175 by 260-mm(10 by 7 by 10 in.)high,and the total capacity of the assembled unit shall bebetween 12 and 13.5 L(3.2 to 3.6 gal).The reservoir shall havea 20-mm(34-in.)flange at the top,to which a cover plate isfitted.6.1.2 The reservoir and cover shall have a m
11、inimum thick-ness of 1.6 mm(0.06 in.)in order to withstand a pressure of140 kPa(20 psi).6.1.3 A drain shall be located either on one side or thebottom of the reservoir to facilitate drainage of the testsolution.The reservoir outlet to the circulating pump(suctionside)shall be located near the bottom
12、 of Side C.The reservoirinlet from the circulating pump(discharge side)shall belocated near the top of Side D.A13-mm(12-in.)elbow shall bewelded to the reservoir inlet opening(inner surface of Side D)so that the liquid flow is directed towards Side A.6.1.4 The cover plate of the reservoir shall be a
13、ttached withbolts and sealed with neoprene gasket material.Openingsaccommodate a pressure gage(0 to 10 kPa(0 to 30 psi)minimum)/vent valve assembly.1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD
14、15.09 on Simulated Service Tests.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 1972.Last previous edition approved in 2006 as D3147 06.DOI:10.1520/D3147-06R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at service
15、astm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.1.5 Openings,64 by 64 mm(212by 212in.),centered onSide A and Si
16、de B accommodate test plates(as described inSection 7).An inlet for regulated air at 103 6 14 kPa(15 6 2psi)and a thermocouple probe are shown in Side C.6.1.6 A liquid collection pan or pans shall be placed underthe reservoir in a position that will allow collection of coolantthat has leaked from test openings during operation of theapparatus.A transparent safety shield shall enclose the reser-voir fully.This shield will be arranged to deflect any spray intothe collection pans.The safety shield