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Post Fabrication Temperatures due to straining UHA-44 ,ASME VIII-1

Post Fabrication Temperatures due to straining UHA-44 ,ASME VIII-1

Post Fabrication Temperatures due to straining UHA-44 ,ASME VIII-1

(OP)
(a) The following rules shall apply in addition to general
rules for forming given in UHA-40.
(1) If the following conditions prevail, the cold
formed areas of pressure‐retaining components manufactured
of austenitic alloys shall be solution annealed by
heating at the temperatures given in Table UHA-44 for
20 min/in. (20 min/25 mm) of thickness or 10min, whichever
is greater, followed by rapid cooling:
(-a) the finishing‐forming temperature is below
the minimum heat‐treating temperature given in
Table UHA-44; and
(-b) the design metal temperature and the forming
strains exceed the limits shown in Table UHA-44.

Refer to the above paragraph of UHA-44 please elaborate either both a & b are applicable simultaneously. For e.g the finished forming temperature is below the heat treating temperature and the fiber elongation is about 33%.The material of tube is SS 304.

RE: Post Fabrication Temperatures due to straining UHA-44 ,ASME VIII-1

Yes, solution anneal is required if a) and b) happen together because of the AND between the two requirements.

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