ASME_SI-1-1982.pdf

Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME GUIDE S I -1 ASME Orientation and Guide for Use of SI(Metric)Units I NINTH EDITION March 24,1982 I T H E A M E R I C A N S O C I E T Y O F M E C H A N I C A L E N G I N E E R S United Engineering Center 345 East 47th Street New York,N.Y.1001 7 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher Copyright 0 1982 THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.BOARD ON METRICATION J.G.Langenstein,Chairman Kurt Wessely,Secretary W.P.Adkins J.T.Blackburn,JI J.S.Castorina 0.J.Fisher W.P.Gobell,Jr.F.T.Gutmann Carl Handen F.R.Jackson R.G.Jobe J.G.Langenstein Samuel Leland J.B.Levy R.J.Mann W.G.McLean J.W.Murdock D.H.Pai J.J.Pohl,Jr.P.c.Quo K.J.Simila C.E.Smith A.M.Smolen D.H.White C.J.Wilson B.D.Ziels ll1.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Con tents SECTIONS 1.Background and Policy.1 2.History of the International System.3 3.S I Base Units.4 4.Supplementary Units.5 6 The Coherence of Derived Units in SI 7 5 Prefixes 5 7.Rules for Use of SI Units in ASME Publications.9 8.Conversion and Rounding.10 9.Dimensioning.16 10.Units Outside the International System.17 11.Units Accepted Temporarily.18 12.Units Not to be Used in ASME Documents.19 13.S I Units for ASME Use.21 14.Introducing SI Units in ASME Publications.23 15.Introducing SI Units in Tables.24 16.Methods of Reporting S I Equivalents for Existkg Standards Under Revision.24.TABLES 1.SI Base Units.5 2.SIUnit Prefmes.6 3.Derived Units With Names.9 4.Some Derived Units Without Names.9 5.Units in Use With the International System.18 6.Units Used With the International System in Specialized Fields.18 7.Units To Be Used With the International System for a Limited Time.19 8.CGS Units with Special Names.20 9.Other Units.20 10.Last of SI Units for ASME Use.21 APPENDICES Appendix1.25 Appendix2.26 Appendix3.28 Appendix4.29 Appendix5.30 Appendix6.31 Appendix7.32 Appendix9.34 Appendix8.33 Appendix10.36 V Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.A W E GUM.Si-1 ASME Orientation and Guide for Use of SI(Metric)Units Ninth Edition March 24,1982 SECTION 1.BACKGROUND AND POLICY The 1967 Regional Administrative Conference passed the following resolu-tion:“Form a working committee to propose and implement constructive solutions to problems associated with conversion to the metric system.”In 1968 a Special Committee on Metric Study was established by the Council of ASME.This committee has held a series of meetings which culmi-nated in the following Council policy:1.1970-The ASME anticipates the displacement of the usage of U.S.customary units by the usage of SI*(metric)units in many fields.2.1970-The ASME believes that both U.S.customary and the S I systems of units,modules,sizes,ratings,etc.,will continue in u s e in the foresee-able future.3.1970-Because of the increasing international commitment of U.S.engi-neering and U.S.industry and commerce,the ASME recognizes the need for an accelerated growth in the capability in and between both systems by the mechanical engineering profession.4.1970-The ASME will encourage and assist the development of this“dual capability”by specific and positive actions,including the fol-(a)Contribute to the continuing development of the International(b)Develop and disseminate data to facilitate conversion and insure(c)Provide and promote education in the fundamentals and applica-lowing:System,particularly to meet engineering requirements.correspondence between the U.S.Customary and SI.tion of both systems.*International System 1 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.(d)Encourage and guide the use.or inclusion of SI units as appropriate(e)Work with ANSI to develop and implement U.S.national poli-5.1970-The ASME will continue to support the National Bureau of Standards of the Department of Com