Gas Suppression System Design and Engineering

What This Service Covers

Design and engineering is the phase where data gathered during the site survey is converted into a buildable, standards-compliant engineering solution. Using the dimensions and leakage characteristics of the protected space together with the selected agent, hydraulic flow calculation software determines how much gas the system needs to carry, which pipe diameters and nozzle types will distribute it, and how many cylinders are required.

These calculations are performed using software certified to the design standard of the specific agent brand in use, and results are validated against international design codes such as FM, UL, VdS, EN, and ISO. The output of this service is a project drawing set and supporting calculation report ready for direct field implementation.

How the Process Works

The process begins by feeding the volume, leakage, and occupancy data gathered during the site survey — together with the already-selected agent type and design concentration — into the calculation software. Hydraulic flow calculation follows, determining pressure loss and flow velocity through the pipework from cylinder to nozzles, and the discharge rate at each nozzle, which in turn drives the correct pipe diameter and nozzle type selection.

The results establish the required cylinder count and total gas quantity, and at this stage the design also cross-checks whether the design concentration can be maintained for the required hold time against the leakage data from the site survey. All calculations are verified for compliance with the design rules of the relevant standards — FM, UL, VdS, EN, and ISO. Finally, the project drawing set — covering pipe routing, nozzle placement, cylinder room layout, and control panel connections — is prepared and delivered together with the calculation report.

The items a specification should cover are collected in our gas suppression technical specification checklist.

Why It Matters

The accuracy of the hydraulic calculation is the single most fundamental factor in whether the system can actually extinguish a fire — an undersized pipe run or a poorly chosen nozzle can prevent the design concentration from being reached uniformly, within the required time, at every point in the space. Standards compliance is not merely a certification requirement; it’s the assurance that the system can be independently verified, audited, and confidently reviewed by another engineer if needed.

This is why the design and engineering phase is the critical engineering foundation on which every subsequent step of the project — material supply, installation, commissioning — is built.

This service is one step in the life cycle of a gas fire suppression system project, from survey to maintenance; every step and agent option is on our home page.