Helideck firefighting systems

Introduction to the DiFF system

On system activation; a valve operates – allowing water to flow through an in-line foam inductor, thereby discharging a correct admixture of foam/water solution (i.e. 1% or 3%) through an array of nozzles installed on the helipad / helideck, thus providing an effective spray distribution covering the entire deck surface.

Compliance and Variants

The DiFF system is designed to meet performance criteria as per applicable standards such as:

NFPA-418
UK-CAA-CAP437
CAP-1264
HSAC-RP161
ICAO
NORSOK
and others.

DiFF Systems are available with self-contained skids, suitable for normally unmanned installations. Additionally, water-only DiFFS are available when installed with passive fire-retardant type aluminium helidecks, catering to specific safety requirements.

DiFF Nozzles

Marsol K3GS and ULP-40 series nozzles are designed for use in Deck Integrated Fire Fighting Systems (DIFFS). Installed across the helipad or helideck, these nozzles ensure an effective spray distribution that covers the entire deck surface, adaptable to a variety of weather conditions. The nozzles are crafted with orifices specifically drilled for optimal horizontal and vertical flow, and they remain fixed in position without the need for 'pop-up' mechanisms. K3GS and ULP-40 Series DIFF nozzles connecting pipe are supplied with either threaded, grooved or flanged end connections based of project requirement.

Design Specifications and Operational Reliability

The layout and number of nozzles are tailored to the specific type of helipad or helideck, considering factors such as the "D" value of the deck, the flow rate, and the coverage area of each nozzle. This design ensures a sufficient overlap of horizontal flows, meeting the standards required for effective fire suppression. Notably, the fixed position of the nozzles eliminates concerns about blockages that could impair functionality, as stipulated in CAP-437. Even if a vertical flow is obstructed by a heavy object, the nozzle will continue to discharge foam from its horizontal orifices, maintaining its operational integrity during critical moments.

Inert Gas System

Inergen

Why choose an Inert Gas System?

Rapid fire extinguishing – usually within 40 seconds.
Thorough fire extinguishment – minimizing reignition risks.
No harm to individuals or equipment.
Prevents secondary damages.

Foam System

Compressed Air Foam (CAF)

Why choose a foam system?

Efficient firefighting against fuel fires.
Useable in outdoor environments.
Object protection for equipment requiring three-dimensional coverage of firefighting
Fluorine-free foam provides environmentally friendly firefighting solutions.

Aerosol System - DSPA

Dry Sprinkler Powder System (DSPA)

Why choose an Aerosol Firefighting System?

Exceptional Effective non-toxic fire extinguishing agent.
Ecologically safe and environmentally friendly.
Significantly reduces the likelihood of equipment downtime.
Uniquely easy to install and maintain.

Kenneth Fredsted Pedersen

Senior Sales & Business Development Manager

Semco Maritime A/S
Esbjerg Brygge 30
6700 Esbjerg
Denmark

Esbjerg, Denmark

Head office

Semco Maritime A/S
Esbjerg Brygge 30
6700 Esbjerg
Denmark

CVR no. DK 2549 0762

REX-no. DKREX170591191
EORI no. DK25490762

Helideck Firefighting Systems (DiFF)

The DiFF System serves as a firefighting solution designed for helipads/helidecks. Depending on its setup, the DiFFS can function either automatically or manually.