(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.
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.