Seismic Design for Piping Systems 2

[Nyby]

Does ASME B31.1 specify seismic requirements for piping systems? I was planning on designing piping attachments to a cooling tower per IBC requirements, but this ASME code was referenced in the specification for seismic design and I don't have a copy currently. Thanks much. Jane

 

[gr2vessels]

Yes Nyby,
The seismic design is part of the piping and pipe supports, safety valves, etc..design. It is however, up to the user / designer to agree on the method and extent of calculations. It seems that you'll have to read carefully the B31.1 requirements, refer to the Non-mandatory Appendixes II, VII, etc..
best of luck,
gr2vessels

 

[LSThill]

Nyby (Structural) & Team Member

http://www.americanlifelinesalliance.org/Products_new3.htm#RetrofitPiping

Guideline for the Seismic Design and Retrofit of Piping Systems, 2002

This guideline addresses new and existing aboveground piping systems that comply with the non-seismic provisions of the ASME B31 pressure piping codes for materials, design, fabrication, examination, and testing. It provides comprehensive but easy to follow guidance for the seismic design of piping systems in essential facilities such as power plants, chemical process facilities, oil and gas pipelines and terminals, and post-earthquake critical institutions such as hospitals. The guideline also presents a compilation of the steps and techniques necessary for the seismic qualification of new or existing above ground piping systems based on current analytical and dynamic testing technology as well as experience from the behavior of piping systems in actual earthquakes. The ALA project scope included development of a seismic qualification standard, to be submitted to the ASME for consideration as the basis for a B31 standard.

Also:

http://www.americanlifelinesalliance.org/pdf/October-ALA-Eqt-SD_110404.pdf

Evaluation Guide for the Seismic Operability of Active Mechanical Equipment - 2004

Many lifeline system mechanical components perform critical functions during and after earthquakes (e.g., a pump that must start to provide fire suppression water or a valve that must close to isolate a toxic or flammable spill). The earthquake performance of these components is assessed by various entities using a combination of analysis, shake-table testing, operational experience, and informed judgment.

To provide a single information source, the ALA developed a guide that encompasses the available performance data for six classes of mechanical components: valves, valve operators, pumps, compressors, fans, and packaged air handling units. For each component class, the guide identifies seismic failure modes and the primary contributors to each failure mode. Checklists are included to facilitate the evaluation of components for new and existing applications in both commercial and industrial facilities.




L S THILL