Hydrogen (H), a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements. This material is considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200). Hydrogen is flammable gas category 1. LEL of Hydrogen is 4%.

Why Hydrogen ? Hydrogen is used to cool the windings of large power plant generators because of hydrogen's high heat capacity and low density. Power plants utilizing hydrogen-cooled generators must maintain optimal hydrogen purity and pressure in the generator casing for proper operation, efficiency, safety, and equipment reliability.

3S-Firestop has ever installed fire protection system in Hydrogen storage facility. The system completed with delu- ge water spray system as well. Lets take a look at the system components :

Gas Detector

This gas detector shall be model specifically designed to detect gas hydrogen. The detector used was Detcon model DM501 IS-H2 and with panel model X40-8-N4X

Flame Detector

FGD model FlameSpec-UV-IR flame detector provides ultra fast response, high performance and reliable detection of a large variety of fires including hydrocarbon fires (visible and non visible), as well as Hydrogen fires.

Heat Detector

Heat Detectors shall be Ex-proof type suitable for hazard class of Hydrogen. This detector is to used for actuation of the deluge water spray system together with flame detector using crossed-zone algorithm.

Deluge System

Deluge is used to deliver water to the spray nozzles. The deluge is electrically actuated via Ex-proof Solenoid. All conduit fittings used is Ex-proof type as well. The spray nozzle used is spiral nozzle.

Full-cone Spiral Spray Nozzle

Spiral nozzle is a kind of full cone nozzle, spray angle range is 60°-170°. Liquid flow rate range is 5.5-410 L/min. This compact nozzle has design of smooth flow channels which can minimize the block of liquid to make liquid reach max flow in given size pipe.