【 Weak current College 】 water mist-Super fire shutter and the relevant regulations of---Power By 【 China power house network 】

Summary: water mist-Super fire shutter published since, because of its advanced technology, fire protection function is complete, beautiful appearance, reasonable price and very popular. This new technology, new products, not only in the country is the first in the world is "unprecedented". Therefore, there is no ready-made text can serve as a basis for the dispute would be fine. This article is a discussion with the relevant regulations.
Keywords: protection, cooling, passive fire protection; active extinguishing fire duration;
1. GB500045 — 95 tall buildings design fire protection standard of local 1999 amendments to the relevant provisions of:
5.4.4 the setting a firewall is a difficult place, use the fire shutter for fireproofing (A). When using the included back fire surface temperature rise for fire resistance determinant conditions of fire shutter, the fire resistance rating of not less than 3.00h (B); when using do not include back fire surface temperature rise for fire resistance determinant conditions of fire curtain, curtain side should be set independent of the "closed discussion of automatic water system 1.1:
The full text is divided into three segments. "A segment" as a separate sentence, indicate what situation available "fire shutter". "B" and "C segment" as a second parallel clause, overall synthesis of an independent sentence; explain the two completely different types of fire shutter distinction between categories.
"B" means "Super fire shutter". It's mandatory for only two points:
1) must take back fire surface temperature conditions for fire resistance.
Fire resistance 2) cannot be lower than 3.00 h.
On what kind of structural materials, as well as how to achieve the above article 2, shall not be mandatory. This reflects the national standard is the "mother", is a program for some specific requirements should be determined by the "child" giving circle. At the same time in the "description" further explained: "this used to fire surface temperature rise for judging criteria, fire resistance and fire resistance 3.00 h fire shutter for special fire shutter".
In the "description" also made it clear that "in recent years, the domestic market to emerge in VAP-steel fire shutter, dual-track inorganic composite fire shutter, evaporative steam mist fire shutter, and so are super fire shutter, is this the material conditions for the smooth implementation of the" water mist-Super fire shutter appeared in 2001, later than this provision enacted in 1999, nearly two years, the provision does not mention; but in a "waiting", explains the national test center according to the above two requirements for inspection of the products are held to meet the regulatory requirements of the "Super fire shutter", enhances the benefit of the provisions/thousand hectares of material conditions.
"C segment" refers to the "ordinary fire shutter", its hard and fast rules as follows:
1) can the door GB7633 and shutter fire resistance test of standards relating to the "non-insulated protective layer of iron curtain from logging back fire surface temperature", unexpected back fire surface temperature rise, only the margin back fire surface at a distance of radiant heat intensity and curtain surface is channeling fire fire resistance to decide it. Also known as: "ordinary fire shutter" or referred to as "fire shutter".
2) ordinary fire shutter as alternate fire effect up to fire partitions separating requirements, so if this shutter, shutter sides independent (D) closed (E) the automatic sprinkler system protection (F), injection duration 3.00 h (G), the strength of water sprinkler ... Appropriate 0.5 m.
More automatic sprinkler systems technical parameters as described in the automatic fire-extinguishing system design specifications (H) "relevant provisions.
· Clearly "common fire shutter" product itself cannot be used for fireproofing.
· If you want to place for fireproofing, you must configure the water system.
· Check GB500084-2001 the sprinkler system design code that:
A) 1.0.3 ... : Protection by water cooling water curtain the cooling effect, with fire shutter, separated by a fire.
B) 1.0.3-curtain systems for the smoke, fire and cooling system is separated from the sprayer with open ... Deluge valves ... Control. Therefore the water curtain system is open and not be closed.
C) 4.2.10 fire curtain should not be separated in size more than 15mX8m opening (stage). In addition, in the description of the reason for its modification is "intended to not recommend the use of fire water curtain, separated for civil construction fire partitions separating facilities." “…… There are dozens of meters of length, or even hundreds of metres (such as the Atrium surrounded by), separated by a curtain system caused fire water consumption, water consumption skyrocketed Interior fire. In addition, the storage of large amounts of water for fire fighting, not used for active extinguishing, and used for passive fire protection approach does not comply with the fire-fighting should be proactive in principle, it is a waste. "This out though available (water system), it is not recommended.
D) can be seen that the "ordinary fire shutter" and water protection, not only is not recommended, and it cannot use traditional open-water system, but should be designed a set of separate, closed-type automatic sprinkler systems and water jet nozzles and strength requirements.
It is clear from the product features, "premium fire shutter" is a itself meets the regulatory requirements and can be used as fireproofing products, while "ordinary" fire curtain, you must use the protection sprinkler system can be used as a fire separation products, while at the same time is not recommended, both to be distinct. From the perspective of Chinese grammar, "b" and "C segment" is the second full clause; (semicolon) and then combined into a complete sentence. Currently, in some places, understood as the "Super fire shutter a its shutter should be set on both sides of the independent closed sprinkler system → 3.00h", this is a great misunderstanding.
2 "-super water mist fire shutter" must supply, the water system design should be based on? the inspection department regulations, extract the relevant parts of them
2.1 "mist-Super fire curtain" in the case of water spray cooling areas, it should be in the Shui GB50219 — 95 spray extinguishing systems located juice standard "as the main laws and regulations.
· 1.0.1, water spray ... Not only canEnough to fight the solid fire, fire extinguishing liquid and electrical fires.
Third, not only can be used as a water spraying fire extinguishing, and can be used to cool the fire and protection.
.1.0.3 water spray extinguishing mechanism: 1); surface cooling; asphyxia 2) 3) dilute emulsion; 4).
· 3.1.3 water hoses pressure, when used for fire extinguishing time should not be less than 0.35 MPa; used for protection of cooling should be not less than 0.20MPa.
3.1.5 use · sprinkler system protects the object, its protected area should be based on the external surface.
· 4.0.2 centrifugal atomization spray water fog sprinkler type out of the mist droplet is not continuous intermittent water drops, it has good electrical insulating properties.
· 4.0.5 filter is a water spray system essential components.
Whether it is used for fire extinguishing .4.0.6 or protection of water spray systems for cooling, you must have a reliable water supply security, the system sets the independent water supply pipe is very necessary. When the valve after the rain set other water facilities will occur due to the uneven water allocation and water spray system to work properly (this independence and "D" independent are two different things).
The provisions of the regulations from 2.2 can think about it this way:
1) water mist curtain is used to separate material protection is correct.
2) apart from the cooling water fog protection (passive), and also has a cool fire, smoke, protection, evacuation, smooth for firefighters to fire fighting for your time, steam and filling space, reducing the air oxygen index from suffocation (proactive).
3) water spray at the same time protects the motor and the electronic control box, increase the shutter limit the overall fire.
4) set up a special sense organs "," temperature, power shortage, shutter cannot fall, will still be able to play a protective effect of water mist separator.
5) nozzle with "centrifugal atomization" type, blast pressure in 0.20MPa ~ 0.35 MPa can be protective about, but also for fire suppression. (Can also be off oil, electric fire).
6) water mist system backend does not allow you to add other water facilities, each fire district's water distribution system should become independent (not with spray system and the pipe), direct connection to the water, the water pressure in vertical pipes (at present only a fire hydrant, water supply time and this match).
Combined with the above regulations to 2.3 suggests:
1) spray Super shutter should have its own independent water supply pipeline.
2) water pressure should be greater than 0.2 MPa to 0.35 MPa for best, then its good spray, while the degree of both cooling protection and fire fighting double effect.
3) water supply must be derived from sustainable 3.00 h, pressure greater than 0.2 MPa fire water (due to fire allows to stop production and domestic water supply). It can be taken from the fire hydrant risers. And installation of the filter. In areas where conditions are also available since the establishment of the tube and fire control pump group, the regulations do not prohibit. 3-Super water mist fire shutter quantity calculation
3.1 GB50219 — 95 water spraying fire-extinguishing system design specifications "in section 3.1.5 use of water sprinkler system protection object, the outer surface of the area should be. Therefore candidates that maximum fire partitions need to aggregate the spray protection.
3.2 spray Super shutter unit area water consumption (L/mln · m2) is measured by the national examination centre. Because of its technology matures, the structure of continuous improvement, has from the beginning of 6.16l/min · m2 (Chengdu metal Windows and doors factory-in 2001, with the inspection report to-2001-2098), to the current 2.74 L/min · m2 (Sichuan Shu on fire fighting equipment co., Ltd. in August 2003 the Sichuan-arc, reported as chuan .NO.200320520), recently there is an update of the "combined water mist Super shutter" submission, it is estimated that can reach 2 mln · L/m2.
3.3 see "mist-Super water fire curtain" design of a text (published in the fire technical and product information magazine 2003 year 6 issues). If properly take into account several factors (sub-zero temperature coefficient, also affected by fog factor, coefficient, effective time coefficients, distance oil、spray sustained coefficient coefficients ... And so on), the coefficient is less than l, overlay into a comprehensive system of approximately 0.45, 2L/min · m2X 0.45 = 0.9 L/min · m2. Therefore, a maximum of water, fire zones, "mist-Super fire shutter" area and 0.9 L/min · m2 multiplied.
4 spray effect duration
4.1 GB50045 — 95 doctrine stipulates 3.00 h, fire shutter is also detected by 3.00h detection.
4.2 3.00 h is detecting fire shutter of fire resistance of rigid index, and the actual water should be in the "fire duration percentage" digital study on fire in the find and the actual situation and other relevant norms.
4.3 GBJl6 — 87 buildings》 description of the table set out to 2.0.10 Beijing, Tianjin, Shanghai and shensi city 5 ~ 12 years duration of fire, including 92.90% ~ 97.20% fire duration are less than two hours (that is, was the fight). 1.50h in 88 per cent in occupies, 1.00 h 80 per cent.
GB50045 — 95 the resistance of the articles description ... Fourth, after analysis, the 24 onwards high-rise building fire, in a continuous fire raged within the partition to 1 ~ 2h accounted for fires and 91 per cent of the total, …
GB50045 — 95 the resistance of the articles description, ... Table 14, Beijing to 2353 times fire statistics, their continuous burn time 1-2 h accounted for 95 per cent. ...
This shows that the combustion in free State, the ordinary law, in addition to fire special fire (e.g.: no water, no fire roadThe chemicals warehouse, tunnel ... , Etc.). Can be extinguished. 2.00h Also note a very important point, this means fire starting 2.00h to fight between total time is not the time to fire with water, which is smaller than the former. Since water mist curtain inter cooling protection features, both active fire, fire extinguishing the fire. Therefore, the total water used more time will be reduced.
4.4 fire shutter generally used in large shopping centres and other places that are building the downlevel (podium). These areas typically have a "closed" automatic sprinkler system.
Learning the rules and regulations we understood as:
1) "water mist curtain" to as a "Super fire shutter", its fire resistance according to the regulations must be greater than 3.00 h, this is the product of "performance indicators". As long as there is a national test center testing qualified inspection reports, can be used as a legitimate product time to market.
2) in considering water renewal times we use is greater than "sprinkler system" 1.00 h, and h for 2.00 to ensure fire protection requirements.
3) fire-fighting water itself by design, and the actual 3.00h tells us 2.00 h has to meet, the excess of nearly 1/3 the amount of water (in the fire investigation did not encounter a fire water tank bottom). This part of the water as specified in the event of fire must be discharged light and pool cleaning before permitting the heavy flooding. Therefore, even if the original is not considering water mist with water, you may consider to use water mist curtain. This part of water is sufficient, and reflect the environmental protection and saving the Earth's resources of the human spirit.
This product creation is engaging in "military research" origin, attached great importance to the regulatory basis and technology demonstration. Due to the "water mist curtain" don't understand colleagues often questioning, therefore, to take this opportunity to bring our basis of regulatory provisions for a report, to seek consensus.
Our view is:
.GB50045 — 95 doctrine "is the" mother ", emphasizes that henceforth, all to replace fire partition using curtain, you must use the" Super fire shutter ". If you want to use normal fire shutter (dual compound or monolithic) you must specifically designed a self-contained closed sprinkler system protection (this system is for the water gauge >> GB50084 — 2001 and GB50219 — 95 does not apply, must develop other regulations) is not recommended to
Available. But the law does not prohibit General fire curtain separated the "fire" and other scenarios.
. "Water mist-Super fire shutter" is essentially shutter and cooling protection-a combination of water mist, in GB50219 — 95 have related products, just be ingenious combination. So you should to do 95 GB50219 — as the principal regulations.
· The product must be GB50045 — 95 requires the State Fire building materials quality supervision and inspection center, the inspection can be time-to-market, and its 3.00h is only the product's "fire resistance", and application conditions.
· Design and validation, such as the water pressure technology data, there is no ready-made regulations may apply. But on the basis of existing laws and regulations of the relevant provisions, industry professionals should be reached the following consensus.
(1) use GB50219 — 95 water spraying fire-extinguishing system design specifications ".
(2) water pressure should be greater than 0.2MPa, 0.35 MPa.
(3) water distribution effectiveness 0.9 strength min · L/m2.
(4) each fire partitions should be independent of the water supply pipeline. Available from the fire hydrant risers water to charge cut-off valve and filter, for maintenance.
(5) the duration of design of water supply and the whole worth mentioning is the building should be fireproof grade synchronization, provisional acceptance as 2.00h
(6) nozzle and probes can be single-sided layout (banning or so), or two-sided arrangement (the number of the side nozzles are half), using the same "water control box" control.
(7) the people's livelihood project, funding and margin, but also to establish a fully independent water supply system as a model project, but does not advocate.
(8) in order to better play active extinguishing effect, you can put the shutter bilateral detectors and sprinkler distribute, to the second control loop, the total water volume. Which side of the fire, which side of the action, this number should be doubled, sprinkler water distribution pipe separated; the electrically controlled box and water control box should be the second independent control loops.