Reconstruction of the unfinished construction facility for the social and business center

3.1.Organising AUPT:

Process Part

Automatic fire extinguishing unit is designed for:

• fire detection, localization and extinguishing ;

• protection of people and material assets from exposure to fire hazards;

• alarm to the personnel on duty room about the start of the plant operation.

• transmission of information to the security post with round-the-clock duty on the operation of the fire extinguishing plant:

- pump room operation mode;

- "Fire," with decryption by sections;

- starting of main and standby pumps;

- power supply failures;

- accident of the city network.

Automatic installation of water fire extinguishing consists of 2 sections of sprinkler fire extinguishing:

• Inside the building, automatic installation of sprinkler fire extinguishing is adopted, with the exception of staircases, rooms with wet processes - bathrooms, unheated tambours, GRF, server.

For the sprinkler system, water is used as a fire extinguishing agent. The main regulatory parameters of the sprinkler fire fighting section in accordance with NPB 882001 * and the specifications developed by Enterprise Center of Expertise LLC:

• irrigation intensity 0.08 l/schem2

• area for calculation of water consumption 120 m2

• design water flow rate is 120 x 0.08 = 9.6 l/s

• The time from the moment of fire detection to the start of water discharge from the sprinklers does not exceed 180 seconds. The standard operating time of the sprinkler fire extinguishing plant is 30 minutes, the actual time - until the minimum water level in the tank is reached .

The estimated number of fires is taken equal to one.

The maximum temperature in the room is + 47° С, we choose sprinklers with a response temperature of 68° С .

The minimum temperature in the parking rooms is above + 5 ° С, according to NPB 882001 we choose a water-filled sprinkler system.

The source of the water supply of the sprinkler fire extinguishing plant is two inputs from the city water supply system, according to the Vodokanal Technical Specification No. 55/ 11215682/0831 of 29.04.09, as well as according to the specifications developed by Enterprise Center Expertise LLC, with the device of the booster pump station of special fire extinguishing:

• Head at the main water feeder, 60 M water,

• maximum flow rate 9.6 l/s for sprinkler section

Total flow required: Q = 9.6 l/s = 34.5 m3/hour = 35 m3/hour

Required head at inlet of 60 M water control units

To ensure the installation of special fire extinguishing of the object with water with the design head after pump units H = 60 m.v. (taking into account the 20m provided by the Water Channel) and the capacity Q = 35 m3/h, a CR 3242 pump manufactured by Grundfos was adopted with the following performance characteristics :

• head H = 45 m.v.;

• capacity Q = 35 m3/h;

• motor power N = 7.5 kW;

• weight 115 kg;

We accept the number of working pumps for the special fire extinguishing station equal to 2, including 1 standby pump.

3.2 Calculation of basic parameters

The supply, supply and distribution pipelines of the sprinkler system are accepted from steel water and gas pipes according to GOST 326275, in accordance with item 6.7 of NPB 882001 *. At the points of pipes connection to valves, valves are provided with detachable connections.

Use piping to connect pump station units and assemblies. Pipes within the pump station building shall be made of steel, separate pipe links shall be welded using flanges. Diameters of pipes within the pump station building are selected by diameters of inlet and outlet branch pipes of pumps, gate valves and valves; to change from one diameter to another, devices of pipeline turns use adapters and branches connected by welding.

Diameters of pipelines are determined by hydraulic calculation, at that water speed is accepted: in suction pipelines - not more than 2.8 m/s, and in supply, supply and distribution pipelines - not more than 10 m/s.

Hydraulic calculation of the diameters of supply and distribution pipelines is made taking into account the parameters of pipes and the calculation method recommended by the Federal State Institution VNIIPO EMERCOM of the Russian Federation.

3.3 Composition and arrangement of elements

Process Part

The main elements of the plant include:

• Grundfos CR 3242 pumps with 7.5 kW motor

• jockey pump with electric motor 0.75 kW

• Control and alarm units complete with tie-in and deceleration chamber (flange-flange) VIKING J-1

• Manually operated rotary disk shutter (handle) PN 1.0 MPa,

• Sprinkler water sprinkler universal special model TY3651. 5mm, 1/2, "SSU, 68¼ C, Kf = 80

In accordance with GOST 12.3.046, the pump station is equipped with devices for supplying water to protected rooms from mobile fire equipment.

Pumps, control and alarm units, as well as gates are located in the room of control units.

The control and alarm unit provides the ability to measure pressure before and after the unit, check the alarm about the unit operation, as well as perform routine operations, drain water and disconnect the fire extinguishing system of any section after a fire without disconnecting the entire system .

3.4 Operating principle.

In a waiting mode (before fire emergence) the soaking-up, bringing, feeding and distributive pipelines of sprinkler installation are filled with water and are under pressure created the jockey pump. The pressure is maintained by the jockey pump on the signal of the pressure switch.

In case of fire, the flask of the sprinkler sprinkler located above the fire center is opened, the pressure in the distribution and supply pipelines drops, as a result of which the shutoff valve of the control unit opens, passing water through the opened sprinkler to the fire center. Pressure in pipelines drops sharply. When the pressure drops to 0.4 MPa, the jockey pump is not able to maintain the required pressure and is disconnected. Operating fire pump is switched on.

If the operating pump does not enter the design mode (pressure 0.65 MPa) within 10 seconds, the operating pump is switched off, and after 4 seconds the standby pump is turned on.

When opening the control unit of sprinkler sections and water supply, pressure annunciators are activated, generating a signal about the start of the sprinkler unit operation in the room with round-the-clock duty and a pulse for turning off ventilation. On the signal from the flow relay, the location of the fire is specified.

Fire pumps shall be stopped manually from the pump station room.

A detailed description of the principle of operation of the units and individual elements included in the plant is given in the technical documentation of the manufacturers.

3.5.Organising AUPT:

Electrical part

Electrical part of the plant operation is described in the book 2 of this project "Automatic installation of water fire extinguishing. Electrical part. "

Upon fire signal, the building process equipment is controlled in "Fire" mode. Control of the building process equipment in the "Fire" mode is provided by the album 3 of this project "Automatic fire alarm installation."

4. installation of equipment

4.1. General provisions:

• AUPT installation works are performed in accordance with:

- this project;

- RD 781.4593 "Systems and complexes of security, fire and fire alarm. Rules of Work Execution and Acceptance ";

- SP 5.13130.2009 "Fire protection systems. Fire alarm and fire extinguishing units are automatic. Design Codes and Regulations "

- PUE "Electrical Installation Rules";

- technical documentation of manufacturers for used equipment;

- SNiP 3.05.0185 "Internal Sanitary and Technical Systems"

- VSN 2509.67-85 "Rules of works execution and acceptance. Automatic fire extinguishing plants, "Ministry of Environment.

- "Manual" to these rules and methodological recommendations "Automatic fire extinguishing and fire alarm systems. Acceptance and Control Rules, "GOVD of the Russian Federation (GUGPS, VNIIPO), M. 99

• Deviations from this project during installation are not allowed without the approval of the project developer.

• Products and materials used in the performance of works shall comply with the project specifications and shall have appropriate certificates, technical passports and other documents certifying their quality. Their installation should be carried out in places defined by the project, taking into account architectural features, mutual arrangement of building structure elements, configuration of protected premises and objects.

• Replacement of equipment and materials with similar ones having a fire safety certificate is allowed only by agreement with the project developer.

• The equipment shall be connected in accordance with the manufacturer's instructions and connection diagrams provided by this project.

• Locations of equipment and piping on the drawings are indicated conditionally and specified during installation, changes are allowed within the limits specified below.

4.2. Placement and installation of control and control devices, equipment, detectors and alerts:

• The composition and location of the fire-fighting automation control and control equipment, as well as the linear part of the plant are provided by Album 3 of this project "Automatic Fire Alarm Installation."

4.3. Arrangement and installation of pumps, pipelines and control units:

• Pumps (item 1.2 of "Equipment Specification" section) and plant control units (item 40 of "Equipment Specification" section) shall be installed in the room defined by the design. The room has to correspond: air temperature not less than 5 wasps, free access of service staff, it is separated from the protected rooms by fire-prevention partitions and overlappings with a limit of fire resistance of less REI 45 and doors with a limit of fire resistance of not less REI 30.

• Distribution piping shall be fabricated from steel pipes (items 2123, 46-47 of "Equipment Specification" section) and placed in accordance with this design. Pipe connections shall be welded, turned using taps (pos.1415, 43-44 of "Equipment Specification" section).

• Pipes shall be attached to construction structures using pipe clamps (item 36, 60 of the Equipment Specification section), pipe hangers (item 37, 5859 of the Equipment Specification section), threaded rods (item 3032, 55-56 of the Equipment Specification section). Fasteners shall allow free movement of pipes during linear expansion or compression, from changes in ambient temperature. Pipes shall not be directly attached to process pipelines or welded directly to various structures.

4.4. Arrangement and installation of sprinkler section piping and sprinklers:

• Sprinkler sprinklers (pos. 65 of "Equipment Specification" section) to be installed in the places defined by the project. The distance from the sprinkler sprinkler socket to the floor plane (coating) must be from 0.08 to 0.4 m.

• Sprinkler sprinklers with one diameter outlet shall be installed within one protected room.

• Attach sprinkler sprinklers of the type with a threaded connection to the couplings (item 72 of the section "Equipment Specification"). Attachment of branch pipes to distribution pipelines is performed by welded connection.

• Sprinklers with cracks, dents and other defects affecting their operability shall not be used.

• Make distribution pipelines from steel pipes (pos. 6671, Equipment Specification section) and to be placed in accordance with this design. Pipe connections shall be welded, turned using taps (pos. 7782 Equipment Specification section).

• Install plugs at the end of each section of distribution pipeline (pos. 8385, Equipment Specification section) at a distance of not less than 50 mm from the last tee.

• Pipes shall be attached to construction structures using pipe hangers (pos. 8992 section "Equipment Specification"), pipe clamps (pos. 8688 of "Equipment Specification" section), threaded rods (pos.9394,115 of "Equipment Specification" section). Fasteners shall allow free movement of pipes during linear expansion or compression, from changes in ambient temperature. Pipes shall not be directly attached to process pipelines or welded directly to various structures.