1、 _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising ther
2、efrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2016 SAE International All rights reserved. No part of this
3、publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49
4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1615_201608 SURFACE VEHICLE RECOMMENDED PRACTICE J1615 AUG2016 Issued 1993-06 R
5、eaffirmed 2016-08 Superseding J1615 AUG2001 Thread Sealants RATIONALE J1615 has been reaffirmed to comply with the SAE five year review policy. 1. ScopeMale pipe threads, including male dryseal pipe threads, when made into assemblies or installed intoports, will generally leak if not covered with a
6、sealant.This SAE Recommended Practice is intended as a guide to assist designers and/or users in the selection andapplication of various types of thread sealants. The designers and users must make a systematic review ofeach type and application and then select the sealant to fulfill the requirements
7、 of the application. Thefollowing are general guidelines and are not necessarily a complete list.2. ReferencesThere are no referenced publications specified herein.3. Types of Sealant3.1 PTFE tape applied as joints are assembled.3.2 Pre-applied paste.3.3 Paste applied as joints are assembled.4. Appl
8、ication of PTFE Tape4.1 Inspect threads to be sure they are not damaged nor contain slivers, burrs, dirt, or other contaminants.4.2 Looking from the leading end of the male thread, wrap the tape clockwise circumferentially around the thread.Overlap each spiral wrap of tape approximately 1/2 the widt
9、h of the tape so that no more than two plies areapplied. Be careful to leave the first 1/2 to 1-1/2 threads bare. Each wrap should be wound so that the tape istight on the threads.4.3 When assembling, each taped threaded end should be put together two full turns past finger tight on sizes upto 1/2 i
10、n male pipe thread. On larger sizes, each threaded end should be put together 1-1/2 to 2-1/2 full turnspast finger tight. (CautionDuring assembly, shredding of the tape can occur with consequent contaminationof the system.)4.4 Each taped threaded end must be able to pass the test requirements detail
11、ed in 7.1 and 8.1. PTFE tape is notrecommended for repositioning or reassembly.5. Application of Pre-Applied Paste5.1 Inspect threads to be sure they are not damaged nor contain slivers, burrs, dirt, or other contaminants.5.2 Apply paste evenly, without air pockets, around the circumference of the t
12、hreaded area, leaving the first 1/2 to1-1/2 threads unpasted and then extending to completely cover a minimum of the next three threads.5.3 For recommended weights of sealant, if that method is used or specified, follow manufacturersrecommendation or submit parts to the acceptance test detailed in S
13、ection 7 or 8.5.4 See manufacturers recommendation for drying times and temperatures. Before use of a threaded part in anassembly, coatings should be firm without being tacky.5.5 When assembling, each prepasted end should be put together two full turns past finger tight on sizes up to1/2 in male pip
14、e thread. On larger sizes, each threaded end should be put together 1-1/2 to 2-1/2 full turnspast finger tight.5.6 Each prepasted end must be able to pass the test requirements detailed in Section 7 or 8.6. Application of Paste at Time of Assembly6.1 Inspect threads to be sure they are not damaged n
15、or contain slivers, burrs, dirt, or other contaminants.6.2 Apply paste evenly around the circumference over the first four or five male pipe threads, being careful to avoidair pockets.6.3 When assembling, each pasted end should be put together two full turns past finger tight on sizes up to 1/2 inma
16、le pipe thread. On larger sizes, each threaded end should be put together 1-1/2 to 2-1/2 full turns pastfinger tight.6.4 Each pasted end must be able to pass the test requirements detailed in Section 7 or 8.7. Functional Tests for Pneumatic Applications (When Using Brass or Aluminum Fittings)7.1 Lea
17、kage After Initial InstallationMale pipe threads, sealed and assembled into a female pipe thread inaccordance with this document, shall not leak when subjected to 0.8 MPa (120 psig) air.7.2 Leakage After ReuseAfter 24 h have elapsed, remove the samples used in 7.1 and reassemble them twofull turns p
18、ast finger tight. Subject them to 0.8 MPa (120 psig) air. To pass, no leakage is allowed.7.3 Repeat 7.2 three additional times, each at 24 h intervals. To pass, no leakage is allowed.8. Functional Tests for Pneumatic Applications (When Using Steel Fittings)8.1 Leakage After Initial InstallationMale
19、pipe threads, sealed and assembled into a female pipe thread inaccordance with this document, shall not leak when subjected to air at the working pressure of the hose ortubing used in the assembly.8.2 Leakage After ReuseAfter 24 h have elapsed, remove the samples used in 8.1 and reassemble them twof
20、ull turns past finger tight. Subject them to air at the working pressure of the hose or tubing used in theassembly. To pass, no leakage is allowed._ SAE INTERNATIONAL J1615 AUG2016 2 of 38.3 Repeat 8.2 three additional times, each at 24 h intervals. To pass, no leakage is allowed.9. Assembly Recomme
21、ndations9.1 To minimize the possibility of a leaking threaded joint after assembling male to female pipe threads, neitherend should be backed out (loosened) once the assembly has been made.9.2 If positioning of a shaped part like an elbow or a tee must be accomplished, thread the shaped part inapproximately 1 to 1-1/2 turns past finger tight and tighten further to the desired position.PREPARED BY THE SAE FLUID CONDUCTORS AND CONNECTORS TECHNICAL COMMITTEE SC1AUTOMOTIVE AND HYDRAULIC TUBE AND FITTINGS_ SAE INTERNATIONAL J1615 AUG2016 3 of 3
