After all, code is a law, which changes with time!
If present is considered a new normal, we are finding shut down every 2.5 to 3 years and considering sustained load with pressure and weight which happens once in blue moon in startup or shutdown. But, the operating condition load is not checked for piping and we are finding welds getting damaged in piping due to high operating load, although
within expansion range allowable.
If today may day is called a day remembered by labors only with socialist view, not of freedom, why can't we change operating load as sustained and cold to hot load as expansion?

We are indebted to the great nation of US to give us May Day, although we are in changed times Worldwide!
Reg,
Sam