As per the NFPA 2001, we shall be able to design an IG-541 Inert Gas system with a discharge time set at 60 seconds for class A & C fires. The standard allows increasing the discharge time up to 120 seconds for Class A and C fires. In reality, how do we achieve a 60-second discharge for such a system? Are we increasing the number of inert gas cylinders than appeared to be in a 120-second discharge or by just increasing the pipe sizes while keeping the same number of cylinders as in the case of 120-second discharge? Please advise. You may consider a 300 bar IG-541 system for this example.