Shabeer,

The equipment manufacturer will have to give you a set of allowables for blast (ask for them).
The problem is to maintain the integrity of the entire system (equipment included) in order to avoid escalation.

Regarding the accelerations, it is a matter of statistics, blast is not an occasional event is accidental. As Rao said, you don't have to combine the two.

Note that you will have to perform also leakage check.

Best regards,