Hi taoxianwen123:

Firewater consumption can be large in process areas, even larger than in storage areas. If you can support your numbers, they will prevail.

Traditionally we have used prescriptive codes and standards and ended up with fire protection systems that sometimes have been underestimated. And plants that look "identical" are not necessarily so in terms of the fire protection requirements. Designers might fail to consider operating manpower levels, environmental concerns, potential for business interruption and facility reputation, among others, which could have an impact.

In recent years, performance-based means of protection are gaining acceptance and designers have now more tools to give them certitude that their protection systems designs really achieves the objectives.

You should consider performing a fire risk assessment. I´ll share the SHELL Design and Engineering Practice titled "Assessment of the Fire Safety of Onshore Installations", which is part of the SHELL DEP (Design and Engineering Practice). I think it explains very well the methodology. The download link is:

[link Point to another website Only the registered members can access]
You will have to consider Loss of Containment Scenarios and Fire Scenarios and carry out many calculations. It will take some time. You won´t cool all the equipment simultaneously, just the ones that need it.

By the way, the Forum thread link for the whole set of SHELL DEP (Design and Engineering Practice) is:

[link Point to another website Only the registered members can access]
Thanks polaris 44.

Well, these are my comments. Other members are still expected to share theirs.

Regards