Steam at 530 deg C is an invisible and instant killer in the event of a leak or failure.
If the level of your knowledge and experience of piping stress analysis may be judged from the simplicity of your question, I wonder whether you should be doing this work ?
I agree with MoverZ.
I wanted to think well and imagined that, this being a forum for software questions (or so I understand it), Rahul didn't know how to translate his knowledge to the software. I cross fingers that is like that. So, simple question, simple answer (reminding flange leak).
Steam at 530ºC can't (or shouldn't) be calculated without stress knowledge.
Regards,