JD Logistics Phase III | Airtightness Test: Creating an "Invisible" Network for the Gaseous Fire Suppression System

JD Logistics Phase III | Room Integrity Testing: Building an "Invisible Line of Defense" for Gaseous Fire Suppression Systems

In a high-standard intelligent logistics system, the reliability of the fire protection system determines the safety of data and operations. Especially in core areas such as server rooms and control rooms, traditional water sprinklers or alarm systems, although able to respond quickly, cannot protect sensitive equipment from water damage. Therefore, gaseous fire suppression systems have become the mainstream choice for these high-value spaces — and their "lifeline" is the room integrity test.

What is a room integrity test?

A room integrity test (Room Integrity Test) is a verification procedure conducted in accordance with NFPA 2001 (2022 edition) Appendix D and ISO 14520 to confirm whether, after discharge, the extinguishing agent can be maintained in the room at sufficient concentration and duration to ensure successful fire suppression. The test does not require releasing the agent; instead, it uses the door fan pressure method (DoorFanTest) to simulate airflow and pressure changes, calculate leakage area, and predict the time the extinguishing concentration can be maintained. If the calculation meets the standard (typically ≥10 minutes), it indicates that the area is well sealed and can allow the gaseous fire suppression to function effectively in the event of a fire.

Why perform a room integrity test for the JD project?

In the monitoring rooms and server rooms of the JD Asia No.1 Phase III Logistics Park, the installed gaseous fire suppression systems are responsible for protecting critical equipment and logistics dispatch data. If the enclosure (walls, doors/windows, cable tray seals) has leaks, the agent will rapidly escape and the extinguishing concentration cannot be maintained; no matter how advanced the system is, it would be rendered ineffective. Therefore, room integrity testing is the key step to ensure the suppression system is "effective" rather than merely "present."

The Tengxi team modeled and calculated the enclosure airtightness, firestop seals, and pressure relief devices according to NFPA standards. The results showed the project's airtightness performance is excellent and fully meets the standard requirements.

This means that in the event of a fire, the system can extinguish quickly and stably without damaging equipment.

Tengxi's advantages As one of the first domestic companies certified as an FM4991 firestop contractor, Shanghai Tengxi Construction Engineering Co., Ltd. possesses integrated capabilities from construction and testing to room integrity retesting, providing system-level protection verification to international standards for projects including JD, pharmaceutical facilities, and data centers.

Conclusion Room integrity testing is not a formality but the "last line of insurance" for gaseous fire suppression systems. It ensures every cubic meter of space can hold a safe concentration, making "the suppression system actually suppress fires" — this is the value Tengxi delivered in the JD project.