Fire protection with deluge systems

Together with our supplier BETE, we offer efficient and reliable solutions for for open-type deluge, water walls, and water mist fire protection systems. A deluge fire protection system consists of non-pressurised dry pipes and nozzles with open spray heads.

We have extensive experience in offshore, petrochemical industry, refineries and other demanding and harsh environments. Fire protection nozzles used in most systems are tested and certified according to Factory Mutual, UL Approval, Lloyd's Register, U.S. Coastgurad Approved.

How does a deluge system work?

A deluge system for fire protection consists of a number of spray nozzles with open spray heads. The nozzles are connected to non-pressurised dry pipes, equipped with a fire water valve (deluge valve). The valve is connected to the water supply. The system can be activated manually or automatically by e.g. heat, smoke or flame detection equipment. Upon activation, the valve opens, water flows to the nozzles and fire extinguishing begins.

Deluge systems can be divided into the following categories:

Cooling

Water is sprayed on the outside of e.g. pressurised vessels containing volatile material. The water keeps the contents cool, thereby preventing the contents from increasing in pressure, which could lead to a major safety hazard.

Water mist

Misting nozzles are used to extinguish or control fires by spraying fine droplets onto the flames, which rapidly evaporate, cool, and displace oxygen.

Water wall

Water wall acts as a shield to protect personnel and equipment from thermal radiation, harmful gases and flames.

Wetting

Water is sprayed to control the spread of a fire but not extinguish it. Wetting is commonly used in gas leak situations where the gas continues to be consumed by the flame until the gas flow is turned off.

Factors to consider for effective fire protection

There are a number of important factors to consider in order to achieve an optimised fire protection solution. Our experienced staff and engineers are available to help with calculations and find the right solution.

  • Size and shape of the target area, equipment, or enclosure
  • Design specifications and requirements - required flow rates/coverage densities
  • Available nozzle mounting locations
  • Available liquid pressure drop (∆P) across the nozzle = supply pressure at nozzle inlet - process pressure outside nozzle

 

Project review and proposed solution

To deliver the optimal solution, it is important to go through in detail various factors that affect product choice, type of solution, investment objective, and other requirements at an early stage of the project.

 

SM Hansa Engineering AB
Sol Millerv Dust control, Spray nozzles & systems, Tank cleaning I look forward to providing product advice and solutions! Let's meet via a video call or a site visit. You can also phone or email us, of course.
LC Hansa Engineering AB
Linda Caporicci Column internals, Droplet separation, Spray nozzles & systems, Other products I look forward to providing product advice and solutions! Let's meet via a video call or a site visit. You can also phone or email us, of course.
HL Hansa Engineering AB
Hans Linder Spray nozzles & systems, Tank cleaning, Safety showers, Tank storage equipment I look forward to providing product advice and solutions! Let's meet via a video call or a site visit. You can also phone or email us, of course.
RR Hansa Engineering AB
Robin Ryberg Spray nozzles & systems, Tank cleaning I look forward to providing product advice and solutions! Let's meet via a video call or a site visit. You can also phone or email us, of course.
AB Hansa Engineering AB
Alexander Bergman Droplet separation, Column internals, Spray nozzles & systems, Tank cleaning I look forward to providing product advice and solutions! Let's meet via a video call or a site visit. You can also phone or email us, of course.

A start-up meeting is important to find out about various factors that will affect choice of equipment and solution in order to achieve the most efficient and sustainable solution. We are happy to set up the start-up meeting as a web meeting or a site visit, depending on your preference. All details and information from the start-up meeting we will summarise and go through with you to make sure we agree on project scope and objective.

Next step, we present a proposed solution, focusing on function, lifespan, quality, choice of material, operating and maintenance costs, and environmental impact. Our goal is to deliver a sustainable solution that creates added value to your company,