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Process Piping: The Complete Guide to ASME B31.3, Third Edition

By
Charles Becht, IV
Charles Becht, IV
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ISBN-10:
0791802175
ISBN:
9780791802861
No. of Pages:
282
Publisher:
ASME Press
Publication date:
2009

The Code includes three Categories of fluid service, which provides a means of discriminating among possible degrees of hazard. Less stringent design, examination, and testing are permitted for fluid service of lower hazard (Category D) and more stringent requirements are applied for more hazardous fluid service (Category M). All fluid services are considered Normal unless the owner designates them as Category D or Category M.

It is the owner's responsibility to select the fluid service category. Selections of Category D or Category M cannot be made without the owner's permission. The fluid service is assumed to be Normal Fluid Service unless a different selection is made. Because some owners may not be familiar with this responsibility, the piping designer should inform the owner of the responsibility and may offer advice with respect to the selection process.

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