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Time: 2017-02-17

Merchants in order to reduce costs, a large number of use without adding

Flame retardant

Ordinary benzene board. According to the investigation found that lanzhou building

Exterior wall thermal insulation

Material problems, do not add flame retardant hidden dangers.

Building facade

Heat preservation material

The problem more

Since January 2011, lanzhou fire brigade has set up a special inspection team to inspect some construction sites and external walls in chengguan, qilihe and anning

Heat preservation material

A check was made. Up to now, a total of 74 construction sites and 214 buildings of various types have been inspected, and 30 illegal behaviors have been found that have not been verified by fire control design or put on record by fire control design. Found 52 fire hazards, ordered to correct 37 immediately; Twelve units violating the law and regulations were placed on file for investigation and punishment, and six units were ordered to stop work for three times, with a fine of 317,000 yuan. Two units are being placed on file for investigation. "In some construction projects under construction in lanzhou, there is a problem that the external wall insulation materials do not meet the requirements. These construction sites mostly use ordinary benzene boards with poor flame retardant performance, which poses a great safety hazard. Lanzhou city fire branch fire prevention staff said.

Insulation material insulation is not safe

On May 23, the reporter saw in lanzhou many construction sites, workers are a piece of blue thermal insulation benzene board nail on the building wall, on whether the thermal insulation board flame retardant, the reporter came forward to ask, the answer is "do not know." Some workers said they were only responsible for installation and had no time to worry about whether they were flame-retardant. "At present, there are many external wall insulation materials, mainly have three categories, one is inorganic insulation materials, such as

Glass wool

, although there is no fire safety problems, but the insulation performance is poor. Another kind is organic and inorganic composite insulation materials to

powder

Polystyrene granule insulation materials, is a refractory material. The third category is organic polymer insulation materials to styrofoam and polystyrene

Polyurethane (pu)

Hard foam is the main, is a combustible material, has the risk of fire. Lanzhou city fire branch fire branch of a staff said. Benzene plate, the scientific name is (double-sided)

Steel wire

rack

Polystyrene boards, both

Building materials

again

Decorative materials

, widely used in building insulation and other fields, benzene board for external wall insulation, to a certain extent, can solve the problem of housing thermal insulation, but the existing fire safety problems can not be ignored.

Combustion performance should not be lower than

B2

level

On September 25, 2009, the ministry of public security and the ministry of housing and urban-rural development jointly issued the "interim provisions on fire prevention of external thermal insulation system and external wall decoration of civil buildings", which made strict provisions on the combustion performance level of external thermal insulation materials of civil buildings: the combustion performance of external thermal insulation materials of civil buildings should be level A, and should not be lower than level B2. Class A is non-combustible material, while B2 is combustible material, which is obviously different from combustible. Residential building height is greater than or equal to 100 meters, the combustion performance of its insulation materials should be class A; Height greater than or equal to 60 meters less than 100 meters, thermal insulation material combustion performance should not be lower than B2 level. If grade B2 material is used, horizontal fire barriers must be provided on each floor.

According to the lanzhou fire detachment law enforcement personnel, they are on the building

Exterior wall thermal insulation

During the inspection of materials, the relevant requirements of the interim provisions on fire prevention of exterior thermal insulation system and exterior wall decoration of civil buildings shall be strictly implemented; Those that do not conform to the regulations shall be ordered to make rectification by the construction unit; Whoever finds that the construction, design, construction and project supervision units bear legal responsibility shall be given strict and severe punishment in accordance with the fire control law and other relevant laws and regulations. Where the external walls of a building cannot be identified

Heat preservation material

Those with combustion performance shall be submitted for inspection in accordance with the law.

How to detect

Heat preservation material

?

So, how should we differentiate the stand or fall of heat preservation material in the life? Lanzhou city fire team key ke jia engineer whether giving the correct test has flame retardant insulation material, the flame retardancy of the material was tested with usually lighter as ignition source, such as relative alcohol burner etc. It is convenient and feasible, but not rigorous, after all, the lighter the release of heat and flame height is not to be compared and alcohol burner at all costs. Non-flame retardant extruded plates are quickly ignited, and the flames tend to get hotter and hotter as they burn.

At the same time, some manufacturers idiomatic plane ignition method determines its flame retardancy, if extruded plate was cut ChengFangZheng square structure, in its bottom line or plane are less likely to be ignited, this method is very deceptive, may make people think its flame retardant, but if the extruded board in edge area to ignite the same environment is not necessarily has the flame retardancy, or flame retardant will be significantly lower, burning obviously.

Building wear "insulation coat" is a good thing both energy saving and environmental protection. However, the lanzhou fire brigade found in the building flammable and combustible external insulation material safety inspection, the 74 construction sites inspected, 214 buildings, found the existence of fire in 52, without fire audit of 30 violations. Reporter investigation discovers, the businessman is reduced to build cost, use in great quantities do not add

Flame retardant

"Pu board", a piece of flammable insulation board affixed to the building under construction outside the wall, in energy saving and warm at the same time buried a safety hazard.