In the manufacturing process of the pressure vessel with jacket (molten alkali pot), after the completion of the manufacturing of the inner tank, is it hydrotreated first and then heat-treated or heat

In the manufacturing process of the pressure vessel with jacket (molten alkali pot), after the completion of the manufacturing of the inner tank, is it hydrotreated first and then heat-treated or heat-treated first and then hydrotreated? It is possible to heat treat and then hydrotreat!

After the heat treatment of the inner cylinder, the hydrostatic test does not pass, then the weld needs to be reworked again for heat treatment (the probability of reworking the weld is very low, basically the hydrostatic test can pass)

Jacket welding, it is best to set up a pad on the cylinder (jacket fillet weld), the pad is welded first, and with the inner cylinder with the heat treatment. Welding jacket, will not be welded directly on the inner tube, so the inner tube can not be heat-treated again.