Pozhtechnika FIRE EXTINGUISHERS  (24)

There is a sense in some markets that the paper and pulp industry will decline owing to the digital technologies with which people interact every day. While this might be considered logical, the reality is completely different. In fact, the paper and pulp industry has experienced a steady growth and will continue to do so in 2021. Production of paper increased by more than 450% in the last decades and the demand of paperboard in the world is expected to grow significantly, driven by e-commerce and big retailers increasing their presence in the online sales universe. This sustained growth in production capacity and paper consumption presents several fire risks to companies and exposes communities that develop around paper mills, to the impact of disasters caused by these fire risks. Fire risks in the paper and pulp industry Paper and cardboard are combustible, but this is not the only fire risk found in these types of industries. Raw materials and finished goods storage are sensitive to fire. In addition, the paper making process includes several stages where fires can occur, due to hot surfaces or poor ventilation. The most relevant fire risks on a paper plant are: Storage Areas: As mentioned before, paper and cardboard are combustible. Solid paper blocks and reels have hard surfaces that don’t ignite easily, but usually these reels can suffer minor damages or have loose sheets that significantly increase the fire risk. When paper reels are stacked in columns, gaps in the center can act as chimneys and when fires start in the bottom of the stack, this chimney effect will accelerate smoke and hot air spread, increasing vertical and horizontal flame spread. Wood and Bale storage fire risks Bale storage also presents a high fire risk, as loose materials are always present Raw materials for the paper making process can have two main sources, forestry products (mainly wood) or recycled cardboard and paper. Wood storage presents several challenges, especially due to wood chips that are highly combustible and, in some cases, even explosive. Bale storage also presents a high fire risk, as loose materials are always present. Fire in baled paper is difficult to extinguish and generates heavy smoke. In many recycling facilities, these paper bales are stored outdoors, where paper or rags soaked in flammable liquids, embedded between the paper sheets, can ignite resulting in a fast spreading fire. Chemicals, flammable liquids and gases In addition, it is possible to find different types of chemicals, flammable liquids and gases that are used in the paper making process. These materials have their own fire-related risks that need to be taken in consideration. Production Areas: In pulp factories, there are several long-distance conveyors that transport wood and wood chips. These conveyors constitute a fire risk and the most probable causes of fire are bearing damage, overheating of the conveyor and igniting chips in the environment. IR dryers, a common source of fire After the wood has been transported, chipped and digested, the paper making process becomes extremely humid, due to the large amounts of hot water and steam needed. But, as soon as the pulp fiber sheet starts to dry, the hot surfaces in contact with the paper sheets can be a source of ignition. IR dryers used in the process are also a common source of fire in the paper industry. When the sheet of paper is formed, close contact with reels and bearings moving fast can create static electricity that could ignite loose paper or airborne particles. Problems like these are likely to be more extensive in tissue mills. Paper dust is generated in certain parts of the process, especially where paper shits are slit or cut. Poorly insulated steam pipes lead to fire Poorly insulated steam pipes can ignite paper dust or even their own insulation materials. In addition, paper dust gathers in the ventilation grills of machinery, causing overheating and igniting as well. Heated oil is used in several parts of the process as well and if a malfunction occurs on the Hot Oil Roll systems, leaks might occur, exposing hot surfaces to this oil and causing ignitions. A paper mill has hydraulically operated machinery, where leaks or sprays might ignite as well. Service Areas: As in many other manufacturing facilities, several service areas can be found. Electrical and network equipment rooms have an inherent fire risk due to damaged wires or equipment, overheating or short circuits in high voltage circuits. Transformer and generator areas entail fire risks as well. High fire risk for boiler rooms Flammable gas distribution systems can be ignition sources, in case of leaks or damaged pipes or valves Hot water and steam are key components for the paper making process. For this reason, paper plants use high capacity boilers that can be powered by flammable liquids or gases. A high fire risk can be considered for boiler rooms. Flammable gas distribution systems can be ignition sources, in case of leaks or damaged pipes or valves. In addition to the fire risks mentioned in these areas, many maintenance operations can also pose fire risk, especially when hot works are being performed. Sparks caused by welding or the use of certain tools can ignite paper sheets or dust in the air. Poor housekeeping and buildup of paper dust, for example, increases the risk associated with maintenance and construction works. Prevention, the first line of defense According to the Health and Safety Executive from the United Kingdom, 60% of fires on paper mills are caused by machine faults and poor housekeeping. The first line of defense to avoid fire risks in paper plants is prevention. As mentioned before, a high number of fires in these types of facilities occur because of poor housekeeping and machine malfunction. The key is to identify the risks and possible ignition sources, and apply measures to minimize them. As in many industries, fire protection has two main components: Passive and Active protection. Passive fire protection measures Passive measures include fire rated walls, ceilings, and floors in the most critical areas. Chemical storage areas should be physically separated from other dangerous areas, if this is not possible then the walls separating areas should be fire rated and materials must be stored in a way that minimizes the risk of fire spread by radiation or conduction. Proper compartmentalization and intumescent protection of structural elements should be part of the package as well. Passive measures include proper ventilation and smoke control. As mentioned before, paper dust is a major fire risk, which is why ventilation and cleaning of hoods over the paper machine is important to minimize the possibility of ignition. Fire resisting construction should be designed with the following goals in mind: Protection of escape routes Form compartments to contain fires that might occur Separate areas of higher fire risk Protect load bearing and structural members to minimize risk of collapse Sprinkler systems, gas extinguishing systems and hose reels Active fire protection includes sprinkler systems, gas extinguishing systems and hose reels to support fire brigades Active fire protection includes sprinkler systems, gas extinguishing systems and hose reels to support fire brigades. Finished goods stored indoors should be protected with sprinkler systems and the same should be considered for chemical storage areas and certain raw materials. Paper bales, ideally should be protected by sprinklers that are suitably designed to cope with the height and located, in all cases, 3 meters above the level of bales stacked vertically (which should not exceed 5 meters height). Spark detectors in hoods, pipes and ventilation systems Dangerous sparks could be generated in several parts of the paper making process, which is why spark detectors must be installed in hoods, pipes, and ventilation systems. Water spray and CO2 systems can be used to protect machinery against these risks. Means to fight fires, like extinguishers and hose reels, should be provided to support fire brigades. All the elements should be properly identified and all personnel should be trained and made aware of the location of such devices. Importance of fire alarms Fire alarms are required in all paper mills and fire alarm call points should be provided in all locations, according to international guidelines, such as NFPA 72 or EN54. The spread of flames and smoke in paper, wood and chemical storage might become extremely fast. For this reason, early detection is critical. Many technologies might be applied in the different areas of a paper plant. Nevertheless, there are dusty or humid areas where regular heat or smoke detectors might fail under certain circumstances. For these areas, especially located outdoors, innovative state-of-the-art detection solutions might be applied, like Video Fire Detection (VFD). NFPA 72 standard for flame and smoke detection NFPA 72 provides guidelines to implement this technology for flame and smoke detection NFPA 72 provides guidelines to implement this technology for flame and smoke detection, opening interesting alternatives for designers and fire protection engineers. Many EHS managers and fire protection professionals selected VFD, because it is the only fire detection solution that effectively covered their needs. Many engineers, specialized in fire protection for paper plants, explained that they tested linear heat detection, aspiration smoke detection, IR/UV detectors and even beams, but none of these technologies performed as they needed on the dirtiest or more humid areas. Video Fire Detection (VFD) solutions Outdoor storage areas are often unprotected, because deploying flame or heat detection in large open areas can be costly and mostly ineffective. VFD solutions can detect smoke and flames in outdoor conditions, allowing the monitoring and protection of wood and paper bales in large areas. Fire detection and alarm systems should be designed with the following goals: Minimize risk of fires, including the use of fire detection technology in areas where regular detection technologies cannot be implemented or are not practical. Minimize risk of flame and smoke spread, with state-of-the-art detection algorithms that guarantee fast and effective detection. Also, reliable algorithms minimize the possibility of nuance or unwanted alarms. In case of a fire, fast detection gives occupants life-saving time to reach to a place of safety, before the flames and smoke have spread to dangerous levels. Global production of paper and pulp reached 490 million tons in 2020, with many industries and markets depended on the paper and pulp supply chain. That is why innovative ways to protect this supply chain, are key to sustain the paper market growth in the future.

There have been challenges with completing fire safety maintenance and installation projects during the current Covid-19 crisis, most notably as a result of the difficulties for installers in safely accessing sites. Many construction projects halted for lockdown and this resulted in approximately 50% of the British installers we work with having to furlough staff. The challenges, however, are not just restricted to the UK. With Kentec panels sold in more than 90 countries across the world, we have seen varying challenges on a global scale. Throughout this crisis, fire safety continues to be paramount and as such key players, such as Kentec, are rightly considered essential businesses. We have continued manufacturing life safety systems throughout the current difficulties and it has been our mission to ensure that where new installations can take place, our panels are readily available to installers, as well as the expertise and technical support that goes with it for ongoing maintenance. Orders for spare parts have also, in fact, been consistently high during this period, as installers have been able to complete minor upgrades safely and end users have taken advantage of the period to do so. Adapting manufacturing processes to align with government guidelines so that customers have not experienced any supply issues with any life safety systems or parts has been a major success. Critical Infrastructure We’ve personally seen an increase in sales for our industry-leading Sigma XT extinguishant panels during this crisis as it is widely used within critical infrastructure, in sectors such as telecommunications, data centres and healthcare. Adapting manufacturing processes to align with government guidelines has been a major success During lockdown, with a vast proportion of the population working from home and relying on the internet to conduct their business and virtual meetings, it has been more important than ever that there is no loss in service in broadband and telephone services. This means that highly reliable and robust fire extinguishing systems are essential to protect essential workers and vital equipment – not only from the risk of fire, but also from the catastrophic damage that false alarms and the release of extinguishant could have, for example, on server room equipment. Understandably, this has resulted in considerable investment in fire systems in these sectors. Glasgow’s Louisa Jordan NHS Facility The recent fire safety installation at the Louisa Jordan NHS Facility Glasgow – located at the Scottish Event Campus (SEC) which provides more than 500 COVID-19 beds – is just one example of essential fire safety work being completed during lockdown. Vipond Fire Protection Ltd installed a total of seven Sigma XT gas suppression panels, and 32 detectors located within the electrical room that serves the 10,000m2 facility. The project was completed in what was an extremely tight seven-day turnaround, delivering proven reliability within a crucial healthcare facility. Kentec's Experience Operating Through Covid-19 We have learned that operating through this crisis and supporting installations that are going ahead is best achieved through detailed planning, communication and collaboration. For example, we’re supporting our distributors by shipping directly to their customers, when it is not safe or feasible to open their warehouses. Operating through this crisis is best achieved through detailed planning, communication and collaboration Our own workforce is also adapting to changing work patterns and demands. In the factory, at a practical level, this has meant implementing new shifts schedules starting from six o’clock in the morning to ten o’clock at night to ensure there are never too many people on site at one time. We have staggered arrival, leaving and break times to mitigate any risks involved at entrances, and we were lucky that space allowed us to make the canteen area bigger and increase the number of toilets from three to ten. We have moved work benches to ensure a safe distance between each employee, and where workflows make two-metre distancing impossible we have installed six- and eight-foot screens. Face masks have been provided to all staff and we are also trialling face shields for further comfort and protection. Our office staff have worked from home, and where going to the office has been necessary, they have similarly adhered to staggered arrival times. Internal communication has been essential and I’m immensely proud and extremely thankful for the positivity, proactivity and support that employees have shown through this process.     We have also adapted our Kentec Installation Partner (KIP) scheme to be fully remote to ensure training and support is there when it is needed for our installers. We are hosting webinars as another forum to solve installer queries remotely, and our new range of Taktis panels have highly advanced networking capabilities and a vast suite of communication tools that support remote monitoring. It is therefore critical that our installers fully understand how to help end users realise the benefits such panels can deliver and to ensure their installations are completed successfully. Looking Ahead To The New Normal Remote monitoring will become increasingly important beyond this crisis We feel that remote monitoring will become increasingly important beyond this crisis and the advanced communication capabilities of panels will be essential for both installers and end users alike. For installers it reduces the amount of time required on site, because they can access the system remotely to find out what equipment or parts they need to take with them. Similarly, for end users they can access systems remotely to check any alerts or queries off site if necessary. It remains to be seen how the rest of 2020 will pan out, but where projects have been necessarily put on hold, because of the essential nature of our industry we are confident that installers will be able to quickly and easily return to these projects when it is safe and feasible to do so. Communication, collaboration and support will continue to be essential in mitigating the challenges in our future ‘new normal.’

  Fire safety in road or rail tunnels is critical in avoiding potentially disastrous incidents Roger Wilton, Assistant Technical Manager of the Fire Industry Association (FIA), explains the challenges of preventing underground fires. Fires in tunnels tend to make headline news, largely because of the potential loss of life that such an incident presents. At the turn of the new millennium three catastrophic fires in as many years ensured that tunnel protection became a real focus on the fire safety agenda. In 1999 the Mont Blanc tunnel fire, probably the most well known of the three, resulted in 39 deaths when a Belgian transport truck caught fire, resulting in temperatures of 1,000°C and taking some five days to cool sufficiently for crews to enter the tunnel to begin three years of repairs and significant enhancements of the safety equipment and procedures. This was followed in November 2000 by the Austrian Kaprun funicular tunnel fire which killed some 155 people as they headed for the pistes in a popular ski area some 350 kilometres to the west of Vienna.  Then, in October 2001, the St Gotthard Tunnel in Switzerland, the third longest road tunnel in the world, saw two lorries collide to create a fire that killed eleven people. Tunnel fires have, of course, occurred before and since but three such major incidents in such a short timeframe highlighted very clearly the dangers of tunnel fires and the need to recognise the specific challenges that tunnels present in terms of fire safety engineering. When construction work is undertaken in an underground location, the project plan for safety and in particular fire safety needs to address the extra risks associated with work in an area that, by definition, will have limited means of escape. The area will inevitably be one in which ventilation will be restricted. Lighting will also be a prime consideration. Risk Assessment A comprehensive and dynamic fire risk assessment document is essential for creating a successful fire safety strategy   Managing an emergency successfully is a matter of planning, having the correct equipment in place and employing an effective maintenance programme to ensure that the equipment works when required. The first essential is a risk assessment undertaken by a competent person. Particularly during the construction phase of a project, the risk assessment needs to be a dynamic working document that changes as the work progresses. The ownership and authorship of said document needs to be one of the project manager’s prime tasks. It should link to a project fire and safety strategy document that indicates how the risks identified are being managed and how the process for emergencies are to be handled. For example, if a risk from mechanical plant operating in the underground location is identified, the strategy may require that a mechanical plant containing volatile fuel or gas be fitted with an automatic fire suppression system and that during operation a specified number and type of portable fire extinguishers be available. The strategy document may also require that persons operating the equipment undertake specific training on the use of fire extinguishers. Fire risk and fire strategy are the tools of the trade for driving down financial loss and reducing project delay. A fire risk assessment follows a logical pattern Identify fire hazards Identify people particularly at risk Evaluate, remove, reduce and protect from risks Record, plan, instruct, inform and train Review the plan Specific fire risks in construction work underground are determined on each site. However, all such work will need to consider the following when producing a proposed fire strategy: Difficulties in providing means of escape. Enclosed environment ventilation issues. Access for emergency services.   Whilst tunnels are constructed, fire hazards must be identified and correct fire safety measures taken During a construction project the first requirement of the risk assessment is to identify the fire hazards. This may be one of the most challenging problems as identifying what will burn and is potential ignition risk is linked to use and the experience of the user. The hazards will change as the construction progresses. The risk will increase as initial construction gives way to first and second fix. The materials used in construction are often delivered in flammable packing to prevent transit damage. A management process for safe storage and for efficient removal of packaging materials is required. The need for fire extinguishers suitable for Class A fires (those involving solid materials, such as paper wood or textiles) is apparent. The construction programme can be part of the risk control programme. For example, the completion of enclosed stair routes before other work proceeds can help address safe escape routes. Early provision of a ventilation system will assist in control of the environment to allow escape. Control of the area by a ‘permit to work’ system and a temporary fire alarm system can assist in the risk reduction process. All of the above underlines my assertion that the risk assessment needs to be a dynamic working document that changes as the work progresses. The fire protection of an area can be enhanced by using heat or smoke detection. The services that a tunnel normally carries can form part of the detection. For example, fibre optic cables can form the sensor for a linear heat detection system that can provide precise location information. As with many fire situations, providing warning at the earliest possible point is the goal and identifying the source of a fire is a significant factor in this process. CCTV systems can also provide a smoke detection output as well as supplying video information. From construction to use Once the construction phase is complete the elements of the operation of a tunnel need to be built into the equation. The risk and the fire load - that is the amount of combustible material in the area or passing through - need to be recognised and the fire protection measures employed accordingly. The requirement for fire fighting systems and the location of portable fire extinguishers will depend on the use to which the structure will be put. If personnel are normally located within a given area of the tunnel, the system to alert them to potential danger needs careful consideration. The variety and versatility of voice and message sounders is an important factor here, with voice-based messaging increasingly being used to provide a precise instruction for an evacuation that is not available from a purely tone-based sounder. Rising to the challenge   Both Europe and the USA are conducting ongoing research into methods of more effectively reducing the threat of underground tunnel fires Tunnels provide their own unique fire safety challenges, whether during the construction phase or when the tunnel is actually in use. This article has only scratched the surface of what needs to be considered. Extensive research is ongoing, both in Europe and in the USA, to find methods of further reducing the threat of fire. This is not only in terms of fire prevention, testing the relative strengths and, importantly, the weaknesses of different fire detection technologies, but also in providing the means for safe evacuation to prevent the tragic loss of life which the three incidents highlighted at the outset demonstrate only too well. Roger Wilton - Assistant Technical Manager - Fire Industry Association (FIA)