1、Designation: D 6396 99 (Reapproved 2005)Standard Test Method forTesting of Pipe Thread Sealants on Pipe Tees1This standard is issued under the fixed designation D 6396; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number 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 procedures used to assemble,evaluate and test pipe thread sealants.1.2 Test procedures included
3、 in this test method are curespeed versus temperature, primer cure, instant seal/sealability,heat aging, solvent resistance, hot strength, steam resistance,and specimen preparation for high pressure testing.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given
4、 in parentheses are forinformation only.1.4 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
5、limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 907 Terminology of AdhesivesD 1599 Test Method for Resistance to Short-Time Hydrau-lic Pressure of Plastic Pipe, Tubing, and Fittings3. Terminology3.1 DefinitionsMany of the terms in this test method aredefined in Terminology D 90
6、7.3.2 Definitions of Terms Specific to This Standard:3.2.1 removal torque, nthe torque required to unseat aninstalled pipe plug from a pipe tee.4. Summary of Test Method4.1 Pipe tee and plug fittings, assembled with the sealantunder test, are subjected to a variety of conditions and testedfor sealab
7、ility and removal torque,12 in. cap, coupling andnipple assemblies are prepared with the sealant under test forhigh pressure testing (typically 10 000 psi).5. Significance and Use5.1 Many of the tests that have been employed in the past toevaluate thread sealant products have not consistently target
8、edthe most significant product features of a thread sealant. Forinstance, one of a thread sealants primary performance fea-tures is its ability to maintain a seal under a range ofconditions. The procedures in this test method assess theimportant characteristic properties of a thread sealant.5.2 Beca
9、use of the variability of the test specimens and thetechniques employed by each operator, the assembly and testprocedures and the testing apparatus have been designed toreduce the variability of the test results.6. Apparatus6.1 Torque Testing Device, of suitable capacity, for testingassemblies.NOTE
10、1Using automated torque testers to test the assemblies gener-ally produces more reproducible results.6.2 Torque Wrench, of suitable capacity, for providinginstallation torque.6.3 Pipe Tee Assembly Block,38 in. (10 mm), as shown inFig. 1, or equivalent.6.4 Pipe Tee Torque Test Block,38 in. (10 mm), a
11、s shown inFig. 2, or equivalent.NOTE 2The pipe tee torque test block is designed to fit an automatedtorque tester, but it can also be used in a vise with a torque wrench.6.5 Pipe Tee Sealability Test Clamp, as shown in Fig. 3.6.6 Temperature Chamber.6.7 Pressurized Pots, for solvent resistance and s
12、team resis-tance testing.7. Test Specimen7.1 Malleable Iron Pipe Tees,38 in. (10 mm).7.2 Forged Steel Pipe Plugs,38 in. (10 mm).7.3 Stainless Steel Pipe Tees,38 in. (10 mm), 304SS.7.4 Stainless Steel Pipe Plugs,38 in. (10 mm), 304SS.7.5 Brass Pipe Tees,38 in. (10 mm).7.6 Brass Pipe Plugs,38 in. (10
13、mm).7.7 Malleable Iron Pipe Tees,12 in. (13 mm), Class 300.7.8 Forged Steel Pipe Plugs,12 in. (13 mm)7.9 Hex Reducing Coupling,12 in. (13 mm) FNPT by18 in.(3 mm) FNPT, 316 stainless steel.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility o
14、f Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved April 1, 2005. Published April 2005. Originallyapproved in 1999. Last previous edition approved in 1999 as D 6396 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servi
15、ceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.10 Cap,12 in. (13 mm) pipe cap.7.11 Hex Long Nipple, 3
16、16SS.8. Assembly8.1 Assemble not less than three assemblies for each test.8.2 Degrease all pipe tees and plugs. Allow specimens tocool to room temperature prior to sealant application.8.3 Apply sealant as follows:8.3.1 Apply sealant uniformly to the second through thesixth threads of the male fittin
17、g for each test joint.8.3.2 Ensure that the average height of the sealant reachesthe thread crown (major diameter), and that the sealantcompletely wets the thread roots.8.3.3 Note any separation or visible defects with the prod-ucts. Also note any problems with wettability or excessiverunning due to
18、 low viscosity or a low thixotropy level.8.4 Assemble test specimens as follows:8.4.1 Using a torque wrench and the pipe tee assemblyblock fixture, install two sealant coated pipe plugs for eachpipe tee. Install with the application of 240 in.lbs (27.1 Nm)of torque.8.4.2 Remove excess sealant to avo
19、id excess specimenweight loss that may be caused by charred sealant flaking offduring initial heat exposure and in steam resistance tests.9. Procedure9.1 Cure Speed Versus Temperature:9.1.1 Use38 in. (10 mm) pipe tees and plugs.9.1.2 Condition pipe tees and plugs in a temperature cham-ber at the cur
20、e temperature specified by the adhesive manufac-turer for a minimum of 2 h.NOTE 3A temperature chamber is not needed for conditioning speci-mens for curing at room temperature.9.1.3 Remove the specimens from the temperature chamber,and immediately apply the sealant, which has been held atroom temper
21、ature, in accordance with 8.3, and assemble thespecimens in accordance with 8.4.9.1.4 Cure the assemblies for the time and at the tempera-ture specified by the adhesive manufacturer.9.1.5 After the specified cure time period, determine re-moval torques for each assembly using the pipe tee torque tes
22、tFIG. 138 Pipe Tee Assembly BlockD 6396 99 (2005)2block fixture, within 30 s of removal from the temperaturechamber. Record the results.9.2 Primer Cure:9.2.1 Use38 in. (10 mm) pipe tees and plugs.9.2.2 Apply the primer specified by the adhesive manufac-turer to the plugs and allow them to dry vertic
23、ally until all thesolvent has evaporated.9.2.3 Apply the sealant in accordance with 8.3. Within 30 sof sealant application assemble the specimens in accordancewith 8.4.9.2.4 Cure the assemblies for the times specified by theadhesive manufacturer.9.2.5 At the end of each specified cure time, test eac
24、hassembly for sealability in accordance with 9.9.9.2.6 Determine removal torques for each assembly usingthe pipe tee torque test block fixture. Record the results.9.3 Heat Aging:9.3.1 Use38 in. (10 mm) pipe tees and plugs.9.3.2 Apply the sealant in accordance with 8.3, and as-semble the specimens in
25、 accordance with 8.4.FIG. 238 Pipe Tee Torque Test BlockFIG. 3 Pipe Tee Sealability Test ClampD 6396 99 (2005)39.3.3 Cure the assemblies for 72 h at room temperature.9.3.4 Test each assembly for sealability in accordance with9.9. All assemblies used for heat aging must be leak-free.9.3.5 Place assem
26、blies in a temperature chamber for thetime and temperature specified by the adhesive manufacturer.9.3.6 Remove assemblies from the temperature chamberand allow to return to room temperature for a period of 1 h 65 min prior to testing.9.3.7 Test each assembly for sealability in accordance with9.9.9.3
27、.8 Determine removal torques for each assembly usingthe pipe tee torque test block fixture. Record the results.9.4 Solvent Resistance:9.4.1 Use38 in. (10 mm) pipe tees and plugs.9.4.2 Apply the sealant in accordance with 8.3, and as-semble the specimens in accordance with 8.4.9.4.3 Cure the assembli
28、es for 72 h at room temperature.9.4.4 Test each assembly for sealability in accordance with9.9. All assemblies used for solvent resistance must be leak-free.9.4.5 Place the assemblies in the solvents, at temperaturesspecified by the adhesive manufacturer. Ensure that the level ofsolvent in the press
29、urized solvent pot is such that the assem-blies are completely immersed.NOTE 4Typical solvents and temperatures are listed in Table 1.9.4.6 Carry out the solvent exposure for the 30 days.9.4.7 Remove the assemblies from the solvent, remove anysolvent inside the tee, wipe assemblies thoroughly, and a
30、llowassemblies to return to room temperature for a period of 1 h 65 min prior to testing.9.4.8 Test each assembly for sealability in accordance with9.9.9.4.9 Determine removal torques for each assembly usingthe pipe tee torque test block fixture. Record the results.9.5 Hot Strength:9.5.1 Use38 in. (
31、10 mm) pipe tees and plugs.9.5.2 Apply the sealant in accordance with 8.3, and as-semble the specimens in accordance with 8.4.9.5.3 Cure the assemblies for 72 h at room temperature.9.5.4 Place the assemblies in a temperature chamber at thetemperature specified by the adhesive manufacturer for 2 h.9.
32、5.5 After the specified time period, determine removaltorques for each assembly using the pipe tee torque test blockfixture, within 30 s of removal from the temperature chamber.Record the results.9.6 Steam Resistance:9.6.1 Use12 in. (13 mm) pipe tees and plugs. Ensure that thepipe tees are Class 300
33、 (see Note 5).9.6.2 Apply the sealant in accordance with 8.3, and as-semble the specimens in accordance with 8.4 using a vise inplace of the assembly block fixture.9.6.3 Through the opening in the tee, add sufficient water tocontact all the joints. Add the same amount of water to all testassemblies.
34、9.6.4 Install the third sealant coated plug in accordance with8.4, using a vise in place of the assembly block fixture, andwipe off any excess sealant.9.6.5 Prepare one assembly without water as a control.9.6.6 Cure the assemblies for 72 h at room temperature.9.6.7 After curing, weigh each assembly
35、and record theweight.9.6.8 Place the assemblies in a pressurized pot and place thepot in a temperature chamber at 400F (204.4C).NOTE 5400F provides an internal pressure of 235 psi (1.65 MPa).Class 300 pipe tees are adequate for this pressure. If testing is performedat higher temperatures (higher int
36、ernal pressure), appropriately rated pipetees must be used.9.6.9 At one week intervals, up to a maximum of six weeks,remove the assemblies from the temperature chamber andallow them to return to room temperature for a period of 1 h 65 min prior to testing.9.6.10 Reweigh the assemblies and record any
37、 weight loss.9.7 High Pressure Testing:9.7.1 Use12 in. (13 mm) couplings, caps, and nipples.9.7.2 Rinse all couplings, caps, and nipples with isopropylalcohol and allow to dry.9.7.3 Apply the specified primer to the female threads of thecap and coupling fittings with a cotton tip applicator.9.7.4 Ap
38、ply the sealant uniformly to the threads on the endof each nipple, ensuring that there is complete coverage of thethread roots.9.7.5 Note any separation or visible defects with the prod-ucts. Also note any problems with wettability or excessiverunning due to low viscosity or a low thixotropy level.9
39、.7.6 Using a torque wrench and a vise, install caps andcouplings with the application of 75 ftlbs (101.7Nm)oftorque.9.7.7 Remove excess sealant.9.7.8 Cure the assemblies for one week at room tempera-ture.9.7.9 After curing, test each assembly for sealability at 10000 psi in accordance with Test Meth
40、od D 1599.9.8 Instant Seal:9.8.1 Use38 in. (10 mm) pipe tees and plugs.9.8.2 Apply the sealant in accordance with 8.3, and as-semble the specimens in accordance with 8.4.9.8.3 Within five minutes after assembly, attach the pipe teesealability test clamp to the assembly, and submerge in a waterbath.9
41、.8.4 Remove any air bubbles introduced during the sub-mersion, and pressurize the assembly to 80 to 100 psi (0.56 to0.7 MPa) for 5 min.9.8.5 Record the presence or absence of any observed leakpaths (air bubble formation) at each test joint.TABLE 1 Solvents and TemperaturesSolvent TemperatureAir (ref
42、erence) 22C, 87C, and 125CDistilled Water 87C10W30 Motor Oil 125C50/50 Ethylene Glycol/Water 87C50/50 Propylene Glycol/Water 87CPhosphate Ester 87CIsopropyl Alcohol 22CPower Steering Fluid 87C or 125CAutomatic Transmission Fluid 87C or 125CUnleaded Gasoline 22CD 6396 99 (2005)49.9 Sealability:9.9.1
43、Attach the pipe tee sealability test clamp to theassembly, and submerge in a water bath.9.9.2 Remove any air bubbles introduced during the sub-mersion, and pressurize the assembly to 80 to 100 psi (0.56 to0.7 MPa) for 1 min.9.9.3 Record the presence or absence of any observed leakpaths (air bubble f
44、ormation) at each test joint.9.9.4 Release the pressure to bring the assembly back toatmospheric pressure.10. Report10.1 Report the following information:10.1.1 Complete identification of the sealant used includingtype, source, date manufactured, manufacturers code number,and form.10.1.2 Identificat
45、ion of the specimen used including sub-strate and dimensions,10.1.3 Surface preparation used to prepare the specimens,10.1.4 Cure conditions,10.1.5 Test conditions,10.1.6 Environmental conditioning,10.1.7 Number of specimens tested,10.1.8 Removal torque results,10.1.9 Instant seal results,10.1.10 Se
46、alability results, and10.1.11 Any deviation from this method.11. Precision and Bias11.1 Based on limited testing (one product, two laboratories,six replicates), a repeatability standard deviation of 12 to 15 %and a reproducibility standard deviation of 16 to 20 % havebeen determined for measuring re
47、moval torque.11.2 No information can be presented on the bias formeasuring removal torque because no material having anaccepted reference value is available.11.3 No information is presented about either the precisionor bias for measuring sealability since the test result isnonquantitative.12. Keywor
48、ds12.1 adhesive; pipe threads; sealant; sealability; torqueremovalASTM International takes no position respecting the validity of 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 s
49、uch 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 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. Your comments will receive careful consideration at a meeting of theresponsible technical committee, whi
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