This Power Piping Code is one of several Sections of
the American Society of Mechanical Engineers Code for
Pressure Piping, B31. This Section is published as a separate
document for convenience.
Standards and specifications specifically incorporated
by reference into this Code are shown in Table 126.1. It
is not considered practical to refer to a dated edition of
each of the standards and specifications in this Code.
Instead, the dated edition references are included in an
Addenda and will be revised yearly.
This Code prescribes requirements for the
design, materials, fabrication, erection, test, inspection,
operation, and maintenance of piping systems.
Piping as used in this Code includes pipe, flanges,
bolting, gaskets, valves, pressure-relieving valves/
devices, fittings, and the pressure-containing portions
of other piping components, whether manufactured in
accordance with Standards listed in Table 126.1 or specially
designed. It also includes hangers and supports
and other equipment items necessary to prevent
overstressing the pressure-containing components.
Rules governing piping for miscellaneous appurtenances,
such as water columns, remote water level indicators,
pressure gages, gage glasses, etc., are included
within the scope of this Code, but the requirements for
boiler appurtenances shall be in accordance with
Section I of the ASME Boiler and Pressure Vessel Code,
The users of this Code are advised that in some areas
legislation may establish governmental jurisdiction over
the subject matter covered by this Code. However, any
such legal requirement shall not relieve the owner of
his inspection responsibilities specified in para. 136.1.