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ASME B31.3-2004
(Revision of ASME B31.3-2002)

Process Piping
ASME Code for Pressure Piping, B31

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ASME B31.3-2004
(Revision of ASME B31.3-2002)

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

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Date of Issuance: April 29, 2005

Mandatory Date: October 31, 2005
This edition was approved by the American National Standards Institute and designated ASME B31.3-2004 on June 24, 2004.

The next edition of this Code is scheduled for publication in 2006. There will be no addenda issued to ASME B31.3-2004.
ASME issues written replies to inquiries concerning interpretations of technical aspects of the
Code. Interpretations are published on the ASME Web site under the Committee Pages at http:// www.asme.org/codes/ as they are issued.
Periodically certain actions of the ASME B31 Committee will be published as Cases. While these
Cases do not constitute formal revisions of the Code, they may be used in specifications, or otherwise, as representing considered opinions of the Committee. The Cases are not part of the Code and are published separately.

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Standards. The Standards Committee that approved the code or standard 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, which provides an opportunity for additional