ASTM F363-1999(2004) Standard Test Method for Corrosion Testing of Gaskets《衬垫的腐蚀试验的标准试验方法》.pdf

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1、Designation: F 363 99 (Reapproved 2004)Standard Test Method forCorrosion Testing of Gaskets1This standard is issued under the fixed designation F 363; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num

2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the evaluation of gaskets undercorrosive conditions at varying temperature and pressurelevels. The test unit may

3、be glass lined if the flanges aresufficiently plane (industry accepted), thus providing resistanceto all chemicals, except hydrofluoric acid, from cryogenictemperatures to 260C (500F) at pressures from full vacuumto the allowable pressure rating of the unit, or made of othersuitable material. The te

4、st unit described (Fig. 1) has aninternal design pressure rating of 1034 kPa (150 psi) at 260C(500F).1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility o

5、f the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardsstatements, see Section 5.2. Referenced Documents2.1 ASTM Standards:2F 112 Test Method for Sealability of Enveloped Gaskets2.

6、2 ASME Standards:3B16.21 Nonmetallic Gaskets for Pipe Flanges2.3 ASTM Adjuncts:4Leakage Test Unit3. Significance and Use3.1 This test method is designed to compare all types ofgaskets under simulated field operating conditions. Perfor-mance of a gasket can thus be measured prior to the start-up ofch

7、emical processes.5The design of the test unit providesmaximum range of corrosion resistance so that meaningfulresults are possible. This test method may be used as a routinetest when agreed upon between the purchaser and the seller.4. Apparatus4.1 Corrosion Test UnitThe unit6shall contain a suitable

8、thermowell, strategically placed near the center so that correcttemperature readings may be made. The gasket seating sizeshall be such as to accommodate a standard 102-mm (4-in.)size gasket.4.2 Heat SourceA 3-A (660-W, 220-V) electric heater hasbeen found to be satisfactory to heat the unit in the v

9、erticalposition to 232C (450F). If the unit is to be tested horizon-tally, the fixture should be in a suitable environmental chamberor oven capable of attaining the desired temperatures.1This test method is under the jurisdiction of ASTM Committee F03 on Gasketsand is the direct responsibility of Su

10、bcommittee F03.40 on Chemical Test Methods.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1973. Last previous edition approved in 1999 as F 363 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm

11、.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.4Available from ASTM International Head

12、quarters. Order Adjunct No.ADJF0363.5Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:F03-1002.6The sole source of supply of the apparatus known to the committee at this timeis The Pfaudler Co., P.O. Box 23600, Rochester, NY 14692

13、. If you are aware ofalternative suppliers, please provide this information to ASTM InternationalHeadquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee1, which you may attend.FIG. 1 Test Unit1Copyright ASTM International, 100 Barr Harbor Dri

14、ve, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3 Necessary Control EquipmentA suitable ther-moswitch with damping capacitor and indicator light to pro-vide means of adjusting as well as control of temperature. Thecircuitry shown in Fig. 2 will control the unit within 63C(65F).4.4

15、 Thermometer, having 0.5C graduations.5. Hazards5.1 Since the test unit is not vented, corrosive liquids thatare likely to be unstable at the test temperature should not beused. The heater wattage should be limited so that a runawaycondition will not produce a dangerously high temperature.The user s

16、hould be aware that under certain conditions oftesting, these safety considerations may prove to be inadequate.Additional safety precautions that may be highly desirableunder certain conditions are left to the discretion of the user.6. Test Specimen6.1 The test specimen shall be dimensioned in accor

17、dancewith ASME Class 150, 4 in. size with inside diameter 114 mm(4.50 in.) and outside diameter 175 mm (6.88 in.) as stated inDocument ASME B16.21. The thickness of the test gasket willdepend on the expected usage and must be specified in thereport.6.2 Preconditioning of the test gasket is not neces

18、sary, sincethis test is designed for shelf-stock gaskets; and, presumably,components affected by aging or normal storage conditionswould not be used in their construction.7. Procedure7.1 Place the test unit in a restraining jig designed to assistin applying torque to the clamping bolts.7.2 Carefully

19、 introduce 500 mL of the selected corrosivetest solution into the test unit.7.3 Locate the test gasket specimen properly on the lowerflange.7.4 Assemble the cover using the bolts, nuts, and washers.NOTE 1Lightly sanding the contacting surfaces of the washers andnuts will minimize variability among t

20、orqued bolts aiding in replication oftest results.7.5 Lubricate the bolt threads well using molybdenumdisulfide dry film or grease.7.6 The test torque value may be obtained either (1) throughthe use of the sealability fixture for enveloped gaskets (see TestMethod F 112), to which 25 % should be adde

21、d for safety; (2)from the gasket manufacturers recommendation; or (3)byestablishing an acceptable leak rate and using the correspond-ing torque figures.NOTE 2Check that the additional safety factor does not exceed thepermissible load on the bolts.7.7 To apply the required torque, tighten the bolts g

22、raduallyand evenly, following the sequence indicated by the numbers inFig. 3. Progression of the tightening on each bolt should be inapproximately 20Nm(15lbfft)increments.7.8 If both vapor and liquid phase test results are desired,place the bolted and assembled test unit on its side in an ovenor env

23、ironmental chamber.7.9 If only vapor phase results are required, place the testunit in an upright position. Use the electric heater to bring theunit to the desired temperature and adjust the thermoswitch asshown by the indicator light.7.10 Retighten the bolts to the final torque previously usedafter

24、2hattheregulated temperature.7.11 Continue the test for approximately 24 h; turn off theheat supply for an 8-h period during each of the next threedays. Continue the test at the desired temperature withoutcycling for the remainder of the prescribed test period. Twoweeks has been found to be sufficie

25、nt time to provide mean-ingful performance information.7.12 Do not dismantle the unit until it has been cooled toroom temperature, and then only with suitable protectiveequipment and with accepted (or standard) safety precautions.7.13 Measure the liquid remaining in the test unit.7.14 Examine the re

26、maining liquid for discoloration.7.15 Examine the gasket for discoloration, cracks, heateffects (such as darkening, carbonizing, hardening), and otherindications of attack or failure.7.16 Check for physical deformations as a result of heat andpressure, or a combination of the two.FIG. 2 Control Circ

27、uitNOTETighten bolts evenly. Follow numerical sequence shown.FIG. 3 Bolt Tightening SequenceF 363 99 (2004)28. Report8.1 Report the following information:8.1.1 Identification of gasket,8.1.2 Specimen thickness,8.1.3 Temperature of test,8.1.4 Description of corrosive solution,8.1.5 Test conducted wit

28、h vapor only (upright) or bothvapor and liquid (on the side),8.1.6 Pressure of test (from temperature-pressure tables ofthe corrosive used in the test),8.1.7 Bolt torque used,8.1.8 Corrosive and heat effects on the gasket, as indicatedby darkening, cracking, or disintegration, and8.1.9 Solution loss

29、es, if any.9. Precision and Bias9.1 Since the results of this test are reported as visualobservations only, no precision or bias statements are possible.10. Keywords10.1 corrosion testing; gasketsASTM International takes no position respecting the validity of any patent rights asserted in connection

30、 with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible t

31、echnical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful conside

32、ration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr

33、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 363 99 (2004)3