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Proposed New ASMEB31P Standard On Preheat & PWHT.pdf

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PROPOSED NEW ASME B31P STANDARD ON PREHEAT & PWHT AWS Heat Treating Conference August 12 – 13, 2014 Arlington, TX Richard D. Campbell, PE (rdcampbe@bechtel.com) Bechtel Phillip D. Flenner, PE (flnr@aol.com) Flenner Engineering Services, LLC ã ASME B31 Pressure Piping Code is comprised of 7 individual Sections: ã ASME B31.1 Power Piping ã ASME B31.3 Process Piping ã ASME B31.4 Pipeline Transportation Systems for Liquids and Slurries ã ASME B31.5 Refrigeration Piping and Heat T
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  PROPOSED NEW ASME B31P STANDARD ON PREHEAT & PWHT AWS Heat Treating Conference August 12  –   13, 2014 Arlington, TX Richard D. Campbell, PE (rdcampbe@bechtel.com) Bechtel Phillip D. Flenner, PE (flnr@aol.com) Flenner Engineering Services, LLC  ã ASME B31 Pressure Piping Code is comprised of 7 individual Sections:   ã ASME B31.1 Power Piping ã ASME B31.3 Process Piping ã ASME B31.4 Pipeline Transportation Systems for Liquids and Slurries ã ASME B31.5 Refrigeration Piping and Heat Transfer Components ã ASME B31.8 Gas Transmission and Distribution Piping Systems ã ASME B31.9 Building Services Piping ã ASME B31.11 Slurry Transportation Piping Systems (incorporated into B31.4 in 2012) ã ASME B31.12 Hydrogen Piping and Pipelines Why is a New Standard Needed?  ã Each Section serves specific areas of the piping industry ã Each Section has different: ã Applications ã Operating Pressures, Temperatures, Conditions ã These Code Sections have diverged through the years in some of their requirements, such as preheat and postweld heat treatment (PWHT) ã Rules in B31 Code Sections are different than those in the Boiler and Pressure Vessel Codes ã The result is a diversity of these requirements that are confusing and difficult to administer and oversee Why is a New Standard Needed?  ã The ASME B31 Standards Committee has made attempts to provide consistency between various Sections by establishing technical committees to oversee similar chapters in different Sections ã The B31 Committee approved a new Standard tentatively titled ASME B31P Standard on Preheat and PWHT to provide nearly identical rules for B31.1, B31.3, B31.5, and B31.12 ã To begin this process, revisions have been made to B31.1 and B31.3 for the 2014 Editions to provide consistent rules in these Sections ã These rules will provide the basis for the proposed Standard ã Task assigned to B31 Fabrication and Examination Committee and chaired by Phil Flenner Why is a New Standard Needed?
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