I would imagine that much depends on local building and fire codes. Our codes allow for the installation of primary and secondary FM200 cylinders within the data center. Check with your local authorities.
Intumescent material (resins, sprays, etc.) often play an important part of data center design for fire doors and penetrating infrastructure. The use and installation of intumescent material must be carefully considered and only done in conformance and compliance with all relevant local, state and federal codes & regulations.