1、Designation:F117988(Reapproved 2014)An American National StandardStandard Practice forInspection Procedure for Use of Anaerobic Thread LockingCompounds with Studs1This standard is issued under the fixed designation F1179;the number immediately following the designation indicates the year oforiginal
2、adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers an inspection procedure to ensurethat studs installed
3、with an anaerobic thread locking compoundhave achieved the necessary backout resistance.1.2 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 an
4、d determine the applica-bility of regulatory limitations prior to use.2.General Requirements2.1 Application of anaerobic compounds,used as a methodfor locking threaded fasteners,shall be in accordance with theanaerobic compound manufacturers recommendations.2.2 Responsibility for InspectionUnless ot
5、herwise speci-fied in the contract,the contractor is responsible for theperformance of all inspection requirements as specified herein.2.3 GovernmentInspectionSystemForU.S.Navyprocurements,each organization shall maintain an inspectionsystem to ensure that all of the requirements of this practice ar
6、ebeing met wherever anaerobic compounds are used for lockingthreaded fasteners.3.Stud Installation Verification3.1 Verification of fastener locking effectiveness of anaero-bic compounds,after the manufacturers recommended settingperiod,shall be in accordance with the following:3.1.1 Witness installa
7、tion and removal through a distance ofthree threads beyond the locking element of a previouslyunused nut(annular plastic ring locking element type)on twostuds in each joint bolt circle containing more than three studs.3.1.1.1 Locate selected studs 180 apart or as close theretoas possible.3.1.1.2 Exa
8、mine only one stud in applications having threestuds or less.3.1.2 Accept the assembly if no turning motion of the studsis observed during nut installation or removal.Also,accept theassembly if a slight initial turning motion(up to14turn)of thestuds is observed,and no further turning motion of the s
9、tuds isobserved,during nut installation or removal.A small initialturning of the set stud represents a breaking or powdering ofthe locking compound which actually increases resistance toany further turning motion.3.1.2.1 Do not restrain studs from turning during the test byany method other than the
10、locking compound in the set end ofthe stud.3.1.3 Reject each stud assembly if the requirements foracceptance of 3.1.2 are not met.If one assembly is rejected,allstuds in that bolt circle shall be similarly checked(see 3.1.1and 3.1.2).Remove and clean all rejected studs in accordancewith the manufact
11、urers recommended procedures,reinstall,and reinspect.3.1.3.1 Reinspection shall consist of selecting two of thereinstalled studs,if four or more studs require reinstallation,orone stud if less than four studs require reinstallation,andperforming procedures 3.1.1,3.1.2,and 3.1.3.3.1.4 If assembly is
12、accepted after step 3.1.2,each stud inthe bolt circle shall be permanently marked(scribe or electro-etched)on the exposed end with a line oriented radially inrelation to the center of the bolt circle.4.Joint Assembly Inspection4.1 Joint assembly shall be completed and final torqueapplied:4.1.1 Note
13、the position of the orientation line(see 3.1.4)onthe studs.If the orientation line position indicates that studshave not turned more than14turn,accept the joint assembly.4.1.2 If the orientation line position indicates one or morestuds have turned more than14turn,reject the joint,disas-semble the jo
14、int,and remove and clean the studs which failedinaccordancewiththemanufacturersrecommendedprocedures,reinstall,and reinspect.4.1.3 Reinspection of the stud shall consist of procedures3.1.1,3.1.2,and 3.1.3.4.1.4 Reinspection of the joint assembly shall consist ofprocedures 4.1.1 and 4.1.2.1This pract
15、ice is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.07 onGeneral Requirements.Current edition approved March 1,2014.Published March 2014.Originallyapproved in 1988.Last previous edition approved in 2007 as F1179-88(20
16、07).DOI:10.1520/F1179-88R14.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.5 Repeat the removal and reinstallation procedure untilthe orientation line shows that studs have not turned more than14turn during the final torquing.5.Keywords5.1 anaerobic compound;inspection;locking threaded fas-tenerASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s
