IN INTRODUCTION SEMA Safety S.r.l. is an established Italian - - PowerPoint PPT Presentation
IN INTRODUCTION SEMA Safety S.r.l. is an established Italian company that operates in international rolling stock fire estinguish systems business and providing 30 years of experience. The company is ISO 9001 certified IRIS
SEMA Safety S.r.l. is an
established Italian company that operates in international rolling stock fire estinguish systems business and providing 30 years of experience.
The company is ISO 9001
certified
IRIS certification is in process
Roll lling stock ck Fir ire extin xtinguish System Evoluti tion
History
In order to limit and prevent fires inside the train and tunnel, the Italian Ministry of Infrastructure issued October 28, 2005, a decree-law for fire prevention railway carriage This decree-law requires mandatory application of appropriate fire-fighting systems the passenger compartment and in the technical rooms. The implementation of this decree-law has been postponed to August 31, 2010, with a special European decree, which stipulates that all new trains needs to be fitted with a certified fire extinguishing system and that by 2020 all the older rolling stock needs to be retrofitted.
RAILWAY REGULATIONS UNI
11565 According to 2010 Decree-Law, the Railway Safety agency ANSF urged UNI to issue a law on railways which describes all the safety criteria and certifications for fire detection and extinguishing systems for rolling stocks in passenger compartments and technical rooms. In 2014 the first version of the standard called UNI11565 Edition 2014 was released and in 2016 was revised and enforced to be applied.
As of nowadays UNI11565 is the
extinguish standard in the world which cover all the requirements and validation process.
SEMA Safety has developed, a powerful system that provides a modern technology for the best fire protection
The full system is composed of sections of detection system which detect presence of fire through sensors, Extinction system which control and dominate the fire as per the standard safety rules and Diagnostic system to monitor the system an be integrated with other
The system is composed of a cylinder of 50lt nitrogen at 200 bar pressure and a cylinder of of 80lt Water. The nitrogen is used to increase water pressure release and the water for fire extinguish is released by means of special valves controlled by a safety logic.
The nebulized water extinguishing system is fully designed and built by SEMA Safety for the highest performance in terms of :
The innovative Delivery Nozzle is a mechanical high precision component designed and manufactured by SEMA which deliver the perfect water mist for the best performance.
The SEMA Safety special nozzles atomize the water, and expedite the fire shutdown action. The particles of atomized water are able to absorb the energy released by the fire reducing the possibility of a reignition of the flame. Water particles of smaller size are subject to rapid evaporation, as a result the thermal energy is removed much more easier and the fire is quickly controlled and extinguished. The spraying action reduce the fumes produced by combustion and reduces the degree of toxicity during the reaction time.
Each nozzle is composed of a semi-spherical body in stainless steel on which four micro-dispensers are placed, geometrically arranged to have as much an isotropic coverage as possible on 2- pi steradians. Their purpose is to atomize the water according to a precise statistical distribution of the diameters of the drops according to the CEN / TS 14972 standard. The extinguishing capacities and therefore the performance of the entire system depend on the correct nebulization of the water. A filter for the removal of any micro-impurities is mounted on the shaft of each head.
The Water Mist SEMA Safety fire shut-off system and its electronic control system have been designed and tested according to the railway standards EN50155, EN50121, EN61373, EN60068, EN50125, in particular the nozzle, designed and built by SEMA Safety, has been tested according to the specification CEN7TS 14972 and the NFPA 750 standard, with particular regard to Drop Size Distribution and to the characteristics of resistance to shock, vibration, thermal shock and salt spray
TEST without fire extinguishing system Test with SEMA fire extinguishing system Qualification for Confort coaches/Double decker/sleep coaches
The fire system control system has a modular architecture and is divided into two hierarchical levels, defined respectively at the vehicle level and at the convoy level. The fire protection system consists of the following redundant devices: CTR control unit (redundant) Remote MRV module for valve control and control of the same. MO remote module for command and control extinguishing system. The CTR has a dedicated redundant bus for the acquisition of analog values from temperature and co smoke sensors The communication between CTR and the remote modules takes place via a redundant RS 485 or CAN bus. MRPU module detects physical MEASURES (temperature, pressure, flow, water level) inside the Water Mist generator.
ZV : Zone Valve MR-V : Remote module for ZV command CTR : Control Unit R : Detector T4 : Nozzle containing 4 micronozzles PU : Propulsion Unit MR-PU : Remote module for PU diagnostic and command
Nozzles T4 are spaced with pitch 3.00<P<3.30 m depending on the environment.
Two type of detectors are used: Smoke+CO and Smoke+Temperature. They are installed alternately. All detectors are connected on a specific bus (Sensor-bus) to the CTR controller. The measured values of opacity, temperature and CO concentration (and the diagnostic data of the individual detectors) are transmitted
processes the data received by all the detectors in the environment.
CTR sends the delivery command to the MR-V modules and to the MR-PU. Delivery is carried out by activating two ZVs at the same time. A possible FAIL when opening a ZV is diagnosed by the reading of the pressure transducer TP. MR-PU drives the Nitrogen valve (EVN) by means of DCMD-1 and DCMD-2 relays (in redundancy). The gas escapes from the cylinder (where it is at the pressure of about 200 Bar) and is limited to the constant pressure of 80 Bar by a special limiter. With this pressure nitrogen pushes the water. This strategy allows:
dually, decrease the weights at the same dispensing time)
Each micro-nozzles on the T4 operates at a nominal pressure of 80 Bar and has the pressure-flow operating curve illustrated on the
micro-nozzle delivers about 0.45 liters / min of water at 80 bar. So with two T4 simultaneously active we have a 3,6 liters/min. With 65 liter of water in the cylinder and a 90% efficiency the delivery time is about 16 minutes. See test reports and technical documentation for further informations about this.
6 months
1 years In addition to the scheduled 6-month operations:
5 years In addition to the operations scheduled for 1 year:
deactivated and the relative detector will continue to operate only with the second quantity (only heat or only smoke depending on the detector); it will be necessary to replace the detector to guarantee maximum reliability.
10 years In addition to the operations scheduled for 5 years:
hoses, gaskets, etc.)
ARGON FD FDMT-LP EXT XTINGUSHING SYSTEM FOR TECNICAL ROOMS
Fire protection inside the rooms technicians proposed by SEMA Safety has the
inside the electrical panel, intervening quickly and safely. FDMT-HP, designed and tested by SEMA is a detection and deactivation system mechanical fire simple and effective. The effectiveness of the system derives from the breakdown
involves the mechanical actuation of the Argon cylinder valve at 200 bar, with consequent discharge of the agent extinguishing, ensuring the extinction in a few seconds.
NO NOVEC FD FDMT-LP EXT XTINGUISHING SYSTEM FOR TECNICAL ROOMS
The FDMT fire protection system LP uses the extinguishing agent NOVEC liquid that acts physically and chemically. NOVEC is indicated for class A, B and C fires it is used as an agent a total saturation. It is not corrosive and does not lead electricity therefore does not cause damage due to short circuit or residuals
The system designed by SEMA Safety FDMT-LP complies with the EN 50155 railway standards and is suitable for the protection of electrical / electronic power panels
The SUB-RACK AREF system is a compact automated system to detect and extinguish technical room fires, using an ecological extinguishing called AEROSOL. The aerosol dispenser is not under pressure and is activated by an electrical contact. The arrest is reached in a period of time that can vary from 3 to 30 seconds.
The UPVT control unit has been designed according to EN 50155 standards and performs the following functions:
detection and the extinction. ADVANTAGES:
VEHICLE PIPI IPING FL FLUSHING MACHINE FOR TESTING & COMMISSIONIONG
The flushing machine implements the following functions: A) Pipes flushing B) flushing of single zone valves. C) pressurized with water and leak testing of pipes and related fittings and from 45 to 330 bar connections D) Operational control of the zone valves E) automatic control of the sealing pressure in the pipes F) Test report documentation G) Remote control of Test Machine functions
700 Water Mist system for passenger compartment for Z1Trains /NTV (high speed train) / SMART-CO regional high capacity double- decker Train. 1770 AEROSOL extinguishing system for tecnical rooms on Z1/ SMART-CO Trains 800 ARGON FDMT-LP extinguishing system for tecnical rooms
100 pcs NOVEC FDMT-LP extinguishing system for tecnical rooms