2015
ASME Boiler
and Pressure
Vessel Code
Summary of Changes:
Section III-Division 1-NB
The summary of changes contained in this document were provided by ASME to IHS as reference information.
This information does NOT and should NOT be used as a replacement to the Code itself. To purchase your copy of the
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2015 ASME BPVC
Section III NB – Rules for Construction of Nuclear Facility Components –
Division 1 - Class 1 Components
List of Changes in 2015 Edition
•
Stress Indices for Branch Connections for r/R < or = 0.5 15-10
•
Editorial Revision to NB-3112.2 (b), NG-3112.2 (a), and NH-3112.2 (a) to replace "Subsection" with "Article" and
"Centigrade" with "Celsius".
•
NB-3653.6 Meaning of moment term in Equation 13
•
BPV III Incorporate the technical content of essential portions of BPV Section III Article NB hopper diagram notes into
the body of Code
•
Definitions of Local Primary Membrane Stress Intensity and Local Thin Areas
•
BPV III Editorial Revisions to ASME BPV III NB-,NC- and ND-3600
•
ASME BPV III, Section III changes to implement revised Bolting Sm values
•
NB-3224.3 and Figure NB-3224-1 and methods to calculate collapse load
•
Incorporation of acceptance of ASNT SNT-TC-1A 2011 into Section III.
•
BPV-III-NB, NB-3222.2 "Primary Plus Secondary Stress Intensity (Range)"
•
BPV III Section III updated Design by Analysis rules for reversing Dynamic Loads
•
BPVC, Section III, Division 1, Organization of Section III
•
BPV III Table NB-3681(a)-1, Stress Indices for straight pipe: Proposed Revision to Table NB- 3681(a)-1
•
Clarification of Sm, Sh and Sy Temperature in NB/NC/ND-3650
•
Pipe Bends in NB/NC/ND-3642.1
•
Clarification of ME Definition in NB/NC/ND
•
BPV Section III, Division 1, NB-3226. Part 1: The intent inquiry with proposed reply. Part 2. The proposed revision to
NB-3226.
•
**INTENT INTERPRETATION** ASME BPVC, Section III, Division 1, NB-2126.1(e) Fin Tube visual examination
•
Relocate reference of applicable Edition for PTC-25 from NB/NC/ND/NE-7000 to Table NCA- 7100-2, Update PTC-25
reference year
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