1、Designation: F 610/F 610M 00a (Reapproved 2009)An American National StandardStandard Test Method forEvaluating the Quality of Molded Poly(Vinyl Chloride) (PVC)Plastic Pipe Fittings by the Heat Reversion Technique1This standard is issued under the fixed designation F 610/F 610M; the number immediatel
2、y following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test
3、method covers a procedure for evaluating thequality of molded poly(vinyl chloride) (PVC) plastic pipefittings after exposure to heat.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; th
4、erefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.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 stan
5、dard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Summary of Test Method2.1 A representative sample of the fitting being produced isplaced in a thermostatically controlled oven at 302 6 5.4F150 6 3C for 30 min. The a
6、cceptability of the fitting quality,after the required test time, is based or expressed as apercentage of the original wall thickness or surface area of thefitting.3. Significance and Use3.1 This test method is applicable to distinguish betweenproperly and improperly molded PVC plastic pipe fittings
7、. Itcan be used to:3.1.1 Determine whether cold slugs or unfused areas arepresent (Note 1),3.1.2 Determine the amount of molded-in stress producedby the molding process (Note 2),3.1.3 Reveal contamination, and3.1.4 Show the quality of the weld line.NOTE 1A cold slug is a piece of material that enter
8、s the mold at asignificantly lower temperature than the rest of the mass.NOTE 2A stress-free part will generally have better properties andhigher strength than those with a high degree of stress. Stress-free partswill generally react better when exposed to chemicals.4. Apparatus4.1 Circulating Air O
9、ven, thermostatically controlled, ca-pable of operating at 302 6 5.4F 150 6 3C such that afterinsertion of the fittings to be tested the test temperature isregained within 15 min or less. (See Annex A1.)NOTE 3The oven should be vented to the outside of the building.5. Conditioning5.1 A specific cond
10、itioning period is not required althoughthe fitting shall be at room temperature. This test can beperformed on a particular fitting any time after it has beenproduced.6. Procedure6.1 Select the fittings to be tested and examine them for thefollowing, making proper notation for the report:6.1.1 The c
11、ondition and appearance of both inner and outersurfaces of the fitting,6.1.2 The condition and appearance of the weld lines andareas adjacent to them,6.1.3 The condition and appearance of the gate and areaadjacent to it, and6.1.4 The condition and appearance of the internal surfaceopposite the gate
12、and gate area.6.2 Place the fittings to be tested in the oven so that eachfitting stands on one of its socket entrances and with sufficientseparation between individual specimens so that the hot air canflow freely between them. Record the time when the air in theoven recovers to 302 6 5.4F 150 6 3C.
13、 After an additionaltime as indicated in Table 1 at this temperature, remove thefittings, taking care not to distort or otherwise damage them.6.2.1 When the fitting being tested has a body and branchwall that falls within two different exposure times, two fittingsshall be tested. One will be tested
14、using the lower exposuretime, and the other will be tested using the longer exposuretime.1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Aug. 1, 2009. Published
15、September 2009. Originallyapproved in 1979. Last previous edition approved in 2005 as F 610 00a (2005).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 Allow the fittings to cool to room temperature naturallyin the air. When cool
16、enough to handle, examine them for thefollowing, making proper notation for the report:6.3.1 The condition and appearance of both inner and outersurfaces of the fitting,6.3.2 The condition and appearance of the weld lines andareas adjacent to them,6.3.3 The condition and appearance of the gate and a
17、reaadjacent to it, and6.3.4 The condition and appearance of the internal surfaceopposite the gate and gate area.7. Interpretation7.1 A suggested interpretation of the results observed isgiven in Appendix X1. Refer to specific product standards fordeviations from this suggested interpretation of resu
18、lts.8. Report8.1 The report shall include the following information:8.1.1 Complete identification of the fitting, including thenominal size, material type and production codes such as partnumber, production date, shift, and machine number.8.1.2 Condition and appearance of weld line and areaadjacent
19、to weld line before and after test.8.1.3 Condition and appearance of the gate and of the areaopposite the gate on the inner surface before and after the test.8.1.4 Condition and appearance of the outer and innersurfaces before and after the test.8.1.5 Type and extent of any delamination produced.8.1
20、.6 Extent and location of any peeling produced.8.1.7 Maximum localized reduction of wall thickness ex-pressed as a percentage of the original wall thickness at theimmediately adjacent area.8.1.8 Any other changes attributable to the test.8.1.9 Date of test.NOTE 4Where cracks appear in the fitting, a
21、 45 angle cut through thefitting at the crack may be made to facilitate examination of the depth ofthe crack.9. Precision and Bias9.1 No statement is made about either the precision or biasof Test Method F 610/F 610M for evaluating the quality ofPVC fittings, since the result merely states whether t
22、here isconformance to the criteria for success specified in the proce-dure.10. Keywords10.1 evaluating; fittings; plastic; PVC; qualityANNEXES(Mandatory Information)A1. DESCRIPTION OF OVENA1.1 The oven shall be large enough to allow freemovement of air around each sample.A1.2 The oven is a circulati
23、ng hot air oven thermostaticallycontrolled at a temperature of 302 6 5.4F 150 6 3C andmust be capable of maintaining the required temperature forthe duration of the test period.A1.3 The oven must be capable of reattaining the requiredtest temperature within 15 min after placing the fittings in theov
24、en.A1.4 The oven must be equipped with a rack placed suchthat free movement of air may be maintained completelyaround the fitting being tested.A2. PLACING OF FITTINGS IN OVENA2.1 When size permits, all specimens shall be placed in avertical position in the test oven standing on one of its socketentr
25、ances.A2.2 When a fitting with a tee configuration is being tested,where the fitting will balance on the single branch socketentrance, it should be placed in the oven on that socketentrance. See Fig. A2.1.A2.3 Where 45 wyes are being tested, the socket entranceon the body of the fitting adjacent to
26、the area of the fittingwhere the wye branch connects to the body shall be the socketentrance on which the fitting is placed on the oven rack. SeeTABLE 1 Exposure TimeMinimum Wall Thickness, eAExposure Time, min.e # 0.118 in. 3 mm 150.118 in. (3 mm) 1.574 in. 40 mm 240AMinimum wall thickness refers t
27、o the standards specified minimum body wallthickness for the fitting being tested. If a minimum wall thickness is not specified ina standard, then the average body wall thickness shall be calculated to select theappropriate exposure time.FIG. A2.1 Placing of Tee Configurations In OvenF 610/F 610M 00
28、a (2009)2Fig. A2.2. The socket entrance of the 45 branch should bepointing downwards.A2.4 When testing is being performed on a regular basisthe oven being used shall be of a size which will accept thefitting in one piece. For occasional testing, when the size of afitting is too large to place inside
29、 the oven in one piece, thefitting may be cut into sections in order to fit inside the oven.The sections shall be cut in such a manner that any cut madeshall not pass through the weld line or gate area of the fittingbeing tested. The fitting in one piece shall be the refereemethod.APPENDIX(Nonmandat
30、ory Information)X1. SUGGESTED INTERPRETATION OF RESULTSX1.1 The specimen quality is satisfactory if the penetrationof the wall resulting from weld line separation or gate flaw orsurface peeling is such that the combined penetration(s) of thetwo sides is not more than 25 % of the original thicknesses
31、. SeeFig. X1.1.X1.2 The fitting has not developed delamination norpeeling over more than 25 % of its surface area. See Figs. X1.2and X1.3.FIG. A2.2 Placing of Wye Configuration In OvenFIG. X1.1 Weld Line SeparationF 610/F 610M 00a (2009)3ASTM International takes no position respecting the validity o
32、f any patent rights asserted in connection 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
33、 revision at any time by the responsible technical 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.
34、Your comments will receive careful consideration 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 c
35、opyrighted by ASTM International, 100 Barr 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).FIG. X1.2 Surface Peeling On Inner Surface At GateFIG. X1.3 Surface Peeling On Inner Surface At GateF 610/F 610M 00a (2009)4
