insure that all reasonable precautions have been taken to preclude rupture of
the piping system pressure boundary. The structural specification should
include:
(a)
A description of the functions of the piping system.
(b) Designation of the boundaries; for example, where the
piping system starts and ends.
(c) Magnitude of the displacements which will be imposed on
the piping system by the connected equipment and intermediate attachments.
(d) Magnitude of the loads from the piping system that are
acceptable to the connected equipment.
(e)
Internal loading history (including tests) and the
Design Pressure.
(f) Temperature history, or fluid flow data from which the
temperature history can be derived, and the Design Temperature.
(g) Environmental conditions; for example, wind, snow,
earthquake, corrosive atmosphere.
(h)
Possibilities of vibration,
water hammer, or other
shock loadings.
(i) Need for protection against accidental damage or abuse.
The structural design specification must categorize the postulated
occurrences or hazards into either normal, upset, emergency, faulted, or
testing conditions. The following definitions apply.
Normal and Upset Conditions: Any condition which is a normal part
of the system operation.
Emergency Conditions (infrequent incidents): Those deviations from
normal system operation which are not expected to occur more than
25 times during the life of the system; for example, earthquakes,
water hammer.
Faulted Conditions:
Not to be used in this Section.
Testing Conditions:
Up to 10 of the tests permitted, including
leak tests. Those tests in excess of 10 shall be included in the
fatigue evaluation.
NOTE:
The structural design specification shall be prepared
by the owner of the hyperbaric chamber complex or his
agent (herein after called the owner). A copy of the
structural design specification shall be kept by the
Owner for the life of the complex.
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