Norma

ASME B31.3-2008
(Revision of ASME B31.3-2006)

Process Piping
ASME Code for Pressure Piping, B31
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A N A M E R I C A N N AT I O N A L STA N DA R D

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ASME B31.3-2008
(Revision of ASME B31.3-2006)

Process Piping
ASME Code for Pressure Piping, B31

A N A M E R I C A N N AT I O N A L S TA N D A R D

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Licensee=China/5940240042 Not for Resale, 01/18/200917:48:28 MST

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Date of Issuance: December 31, 2008

The next edition of this Code is scheduled for publication in 2010. This Code will become effective 6 months after the Date of Issuance. There will be no addenda issued to this edition. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code.Interpretations, Code Cases, and errata are published on the ASME Web site under the Committee Pages at http://cstools.asme.org as they are issued.

ASME is the registered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code orstandard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not “approve,” “rate,” or “endorse” any item,construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advisedthat determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretations of this documentissued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.

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Copyright ©2008 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A.

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QM•9N•}CONTENTS
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Committee Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . ....