【 Weak current College 】 importance of fireproof sealing---Power By 【 China power house network 】

According to the Ministry of public security, Ministry of posts and telecommunications People's Republic of China on effectively strengthen the telecommunications facilities of fire safety and the architectural design of the fire code and other relevant documents, on cable protection device, on all levels of communication hub and programmable room cable shaft and through-wall holes must be rigorously by fire blocking, its purpose is to: fire, fire-retardant. Cable into the strong power cables and power cables, cable fire there are several reasons: first, the cable itself on fire and external influence on fire, cable long heavy load, aging or damaged insulation cortex, cable joints, causing fire bad contact; second, the oil system of oil leakage; the third is caused by a bunch of small animals crawl, short circuit, and other combustion of fuel ignition, electric welding accident sparks or heat pipe near the device, causing ignition cable overheat; fourth, people drop fire caused fire. In short, the causes of ignition cable are varied, take effective preventive measures is based on the actual situation at multiple levels.
In recent years, as the cable is on fire, an accident of yanran such as power plants, substations, telecommunications, computer, mobile communication building, buildings, etc. Due to the strong electric cable, power cable, laying numerous intensive and cable shaft height difference ratio, natural ventilation, cable tunnel space narrow, if these sites once, when the fire is not a valid block, the fire will follow the cable group to expand the scope yanran until the fire burned the entire room, base station, causing a power outage or communication interrupt, etc, will result in huge economic losses.
As the current range of high-quality, high-performance cable fire protection products successfully, select high-quality fire protection products and manufacturers, professional installation team, in-room cable shaft, through wall plugging holes for fire-retardant treatment is prevention than unburned, reduce the incidence of accidents and to prevent and reduce economic losses. To this end, the communications room and communication base station fire sealing must be carried out.

4. professional construction plan

4.1 pipeline runs through the orifice of fire-blocking

4.1.1 when metal pipeline runs through concrete floors or concrete, concrete block walls, its fire blocking should satisfy the following requirements:

1) when the ring gap is low, should use inorganic blocking materials fire-resistant plaster, or organic blocking materials such as fire clay or fire resistant sealant with mineral wool filling materials, such as sealing or fire foam;

2) when the larger ring gap should be used in fire protection coating mineral wool Board (hereinafter referred to as mineral wool plate), fire Board, flame packs, inorganic blocking fire protection mortar or organic blocking materials such as fire protection foam bricks and other sealing;

3) when the fire sealing components to the appropriate insulation performance, and runs through the hole in the vicinity of combustibles, both sides should be run through the orifice is greater than or equal to the width on the thermal insulation pipe length.

4.1.2 when metal pipeline runs through light fire separation wall, the fire blocking should satisfy the following requirements:

1) when the ring gap is low, should be used as organic blocking fire clay or fire resistant sealant with mineral wool filling materials, such as sealing or fire foam;

2) when a ring gap is large, you should use mineral wool Board, fire Board, flame packs, or organic sealing material such as a fire retardant foam bricks and other sealing;

3) when the fire sealing components to the appropriate insulation performance, and runs through the hole in the vicinity of combustibles, both sides should be run through the orifice is greater than or equal to the width on the thermal insulation pipe length.

4.2 cable through the hole fire blocking

4.2.1 single cable or cables bundle through hole fire blocking should satisfy the following requirements:

1) when a cross-cutting hole diameter not greater than 150mm should be used inorganic blocking materials fire-resistant plaster, organic sealing material such as fire-clay, fire resistant sealant, fire retardant foam or fireproof sealing plug, etc.;

2) when running through the orifice diameter greater than 150mm should be used inorganic blocking materials fire-resistant plaster, or organic blocking materials such as fire protection foam tiles, mineral wool board or fireproof Board supplemented by organic blocking materials such as intumescent sealant or fire-clay, sealing;

3) when the cable bundles through light fire separating wall, which runs through the openings should not be using inorganic blocking materials fire-resistant plaster block.

4) cable into the spare room, cabinets, boxes at the bottom of the cable, since the tank bottom up 1.5m long brushing fire-retardant coatings; scene all electrical spare, Cabinet, Cabinet bottom adopts fire divisions and organic fire blocking materials for sealing.

4.3 cable tray (trunking) runs through the orifice of fire-blocking should satisfy the following requirements:

4.3.1 bus (Groove) runs through the orifice of fire-blocking should satisfy the following requirements:

1) when running through concrete floors or concrete, concrete block walls should be used fire Board, mineral wool Board, inorganic blocking materials fire-resistant plaster or organic blocking materials such as fire protection sealant and other sealing;

2) when running through light fire separation wall, you should use fire Board or mineral wool board block.

4.3.2 cable tray (trunking) runs through the openings should use inorganic blocking materials fire-resistant plaster, organic sealing material such as fire protection foam, or flame packs, mineral wool Board, fire Board or organic sealing material such as a fire retardant foam tiles with organic blocking materials such as fire protection sealant or fire-clay, etc. block. When penetrating light fire separation wall, it adopts inorganic blocking materials fire-resistant plaster block.

4.3.3 enclosed Cable Tray through the orifice of fire blocking should satisfy the following requirements:

4.3.3.1 when run through concrete floors or concrete, concrete block walls, its fire blocking should satisfy the following requirements:

1) when the gap is low, you should use inorganic blocking materials fire-resistant plaster, or organic blocking materials such as fire clay or fire resistant sealant with mineral wool filling materials, such as sealing or fire foam;

2) when the gap is large, you should use fire resistant coating for mineral wool Board (hereinafter referred to as mineral wool plate), fire Board, flame packs, inorganic blocking fire protection mortar or organic blocking materials such as fire protection foam bricks and other sealing;

3) when the fire sealing components to the appropriate insulation performance, and through-holePopulation in the vicinity of combustibles, both sides should be run through the orifice is greater than or equal to the width length take insulation measures.

4.3.3.2 when run through light fire separation wall, the fire blocking should satisfy the following requirements:

1) when the gap is low, you should use organic sealing material such as fire clay or fire resistant sealant with mineral wool filling materials, such as sealing or fire foam;

2) when the gap is large, you should use mineral wool Board, fire Board, flame packs, or organic sealing material such as a fire retardant foam bricks and other sealing;

3) when the fire sealing components to the appropriate insulation performance, and runs through the hole in the vicinity of combustibles, both sides should be run through the orifice is greater than or equal to the width length take insulation measures.

4.4 Cable Tray fire wall

Setting of the fire wall blocking the construction process is done with angle bracket: with expansion bolts tight on both sides of the wall, reversible δ = 10mm fire Board Packer, reserved water hole at the bottom, the cable around organic tight blocking packages, intermediate layer stacked package with fire, then compacted organic blocking fill flat, top with fire Board, side fire panels on both sides with organic blocking do feet. In the fire wall on both sides of the cable, length fireproof paint Daubs 1.5 m. Cable fire-retardant coatings in clear brushing dust, stir well before use, as paint instructions construction, paint brush, three times, the thickness of δ = 0.8 ~ 1.2 mm, usage: 2.5 kg/m2.

4.5 other cross-cutting hole fire blocking

4.5.1 when multiple types of cross-cutting of mixed through being run through matter, you should press the appropriate type throughout the orifice of fire sealing requirements for plugging in; when there is a hybrid cross-cutting of plastic pipe diameter greater than 32mm, which runs through the openings should not be used to fire the package sealing.

4.5.2 the empty opening fire blocking should satisfy the following requirements:

1) when empty open area greater than 0.25m2 should be used fire Board, mineral wool Board, fire-resistant package, organic sealing material such as a fire retardant foam bricks or inorganic blocking fire protection mortar and other sealing;

2) when empty open area less than 0.25m2, should adopt organic sealing material such as fire protection foam, fire-clay or inorganic blocking fire protection mortar sealing;

3) light fire separation wall openings should not be on the air with inorganic blocking materials fire-resistant plaster block.

4.6 throughout the fire sealing structures

4.6.1 larger runs through the orifice uses inorganic blocking materials fire-resistant plaster block should fire mortar in reinforcement.

4.6.2 when adopting flexible fire sealing materials and fire-blocking component itself mechanical stability is low, the wall of the sealing on the cross-cutting hole in the wall on both sides with steel wire mesh or combustible material, such as support; floor of block on through hole should be in the floor on the underside of the wire mesh or combustible material, etc. Steel wire mesh or combustible material, such as the wall or floor room should be used with certain fire performance fasteners fixed.

4.6.3 when using fire Board plugging and fire sealing component itself mechanical stability is low, should fire Board reinforcement measures taken.

4.6.4 when used with a collar or flame, the wall of the sealing on the cross-cutting hole should be installed on both sides of the wall collar or fire zone; floor of block on cross aperture, you can install the floor side or flame with collar.

4.6.5 the floor cannot withstand loads throughout the fire perimeter sealing components should take protective measures.

With UL, FM certification of fire protection material;

Construction method in Visual FoxPro: