Post HA N2 of the western mechanized sorting slide. Fire alarm installation and automatic fire extinguishing installation

Contents

Introduction

Object characteristic

Automatic fire extinguishing system and automatic fire alarm system

Evacuation Warning and Management System

Power supply and earthing

Installation of cable products and equipment

Equipment placement

Description of technical means

Information on organization of production and maintenance of installation works

Basic Safety Requirements

Space Explication and Characteristics

Calculation of Main and Reserve Stock

Hydraulic calculation of gas fire extinguishing systems

Calculation of the area of openings for overpressure relief

Calculation of the main and reserve number of powder fire extinguishing modules in accordance with SP5.13130.

Electrical calculations

List of main equipment certificates

2. Characteristics of the object.

Building at: ____________________________________________, post number 2 western fur. variety. roller coaster (hereinafter "Structure") consisting of:

- relay, accumulator;

- control room (room with round-the-clock staff duty).

"Building" is a two-story building with a cable basement. All rooms have access to the corridor, which leads directly to the exit from the building.

The walls of the building are brick. Concrete slabs and steel structures. Suspended ceilings in separate rooms. The category of rooms according to explosion and fire hazard - B4 and B3, according to PUE - does not exceed PIIa. The building has an address fire alarm system based on the RADUGA2A PSK. The existing fire alarm system is not compatible with fire control devices. In accordance with Appendix A SP5.13130.2009, Table A.3, item 8, item 20, item 22 (control room without automatic system), the existing fire alarm system shall not be dismantled and shall operate simultaneously with the designed fire extinguishing systems of the facility.

The relay has a cable basement. There is no false ceiling in the relay room. The process equipment of the relay is racks with relay automation. The main fire load in the relay room is 1 table from CPD, cables with PVC insulation, wooden half. The cable basement is a technical underground in accordance with SNIP 2.08.0289 (ed. 2003) Appendix 3 - mandatory, item 4.

The main fire load of the cable basement is PVC insulation of cables.

There is a false ceiling in the control room. The distance from the false ceiling to the overlap is less than 0.2m. In the space between the false ceiling and the floor, there are cable wiring for lighting circuits. There are no other cables behind the false ceiling. Total insulation weight of 3x2.5 IWGn cable is less than 0.12 l per linear meter. The space behind a false ceiling in dispatching office automatic installations of fire extinguishing is not equipped (see note 2 to the tab. of A2 SP513130.2009). The process equipment is a manual control and indication panel. In the control room fire load are:

- tables from CPD 2 pcs. 27 kg (G1 = 2 x 27 = 54 kg)

- metal chairs 2 pcs with a seat made of polyethylene foam 1 kg (G2 = 2kg)

- Cables in control panel with PVC sheath (steel sheet panel):

5x2.5 cables - total length 80m, mass of PVC insulation G3 = 80m x 0.12 kg/m = 9.6 kg

- cables 5х4 - 22 m, a lot of PVC isolation of G4=22m x of 0.16 kg/m = 3.52 kg

Specific combustion heat of CPD Qn1 = 18.4 MJ/kg

Specific heat of polyethylene combustion Qn2 = 47.14MJ/kg

Specific heat of PVC combustion Qn3 = 18.1 MJ/kg

There are no combustible gases, liquids, dust and fibres in the room, therefore, the room belongs to categories B1B4. To clarify the category we will use SP12.13130.2009, Appendix B.

To calculate the maximum specific fire load, we take the maximum amount of burned material per 10 square meters. m of room area. Heat released by all materials on site 10sqm. will be:

1Q = (G1 x Qn1) + (G2 x Qn2)) + (G3 x Qn3)) + (G4 x Qn3) = (54kg x 18.4MJ/kg) + (2kg x 47.14 MJ/kg) + (9.6kg x 18.1MJ/kg

We calculate the maximum specific fire load per 10 sq.m. of the control room area:

g = Q/10 sqm = 1325.4MJ/10sqm = 132.5MJ/sqm

Since g < = 180 MJ/sq m, then, in accordance with SP12.13130.2009, Appendix B, Table B.1, the control room belongs to category B4 for explosion and fire hazard.

According to SNiP 210197 fire resistance rating of building II. Functional fire hazard class F 5.1. Structural fire hazard class C0.

Category of explosion and fire hazard of protected premises of main building does not exceed "B3." The explosion and fire hazard category of the extension for the accumulator is "A"

In accordance with SP5.13130.2009, Table A.3, the following EC rooms shall be equipped with automatic fire extinguishing system (ATS), which accordingly performs fire alarm functions:

- 1st floor, room 3 - relay;

-1 floor, 3-relay room - cable basement;

- 1st floor, room 5 - battery room;

Since the area of the HA rooms to be equipped with APT systems is more than 40 percent of the total area of ​ ​ the floors of the building, in accordance with SP5.13130.2009, Appendix A, item A5, the HA building must be equipped with APT systems, with the exception of the rooms listed in item A4:

- with wet processes (showers, bathrooms, cooled chambers, washing rooms, etc.);

- ventilation chambers (plenum, as well as exhaust, not servicing production rooms of category A or B), pump water supply, boiler and other rooms for engineering equipment of the building, in which there are no combustible materials;

- categories B4 and D by fire hazard;

- staircases.

At the same time, in relation to the HA building:

- Control room without automatic control system (2nd floor, 2nd room) belongs to category B4 by fire hazard;

- Room 1 on the 1st floor is a staircase and does not contain combustible materials.

- Room 2 on the 1st floor is a partition-off under the stairwell and does not contain combustible materials.

- Room 1 on the 2nd floor is a staircase and does not contain combustible materials.

All rooms of the HA station do not contain the materials listed in item 8.1.1. SP5.13130.2009

Thus, in accordance with SP5.13130.2009, Appendix A, paras. 4 and 5, the following premises of the facility are equipped with an automatic fire extinguishing system:

- 1st floor, room 3 - relay;

-1 floor, 3-relay room - cable basement;

- 1st floor, room 5 - battery room;

The battery room does not have forced ventilation and, in accordance with VNPB 2.02/MPS02, is subject to protection by modular installation of powder extinguishing in explosion-proof design.

Signals from the automatic control system are output to the room with round-the-clock staff duty - this is room No. 2 on the 2nd floor (DS). Its area is 12.9 sq.m., height 2.7 sq.m. Panoramic glazing provides uniform natural illumination over 100 lux. The room is heated, with natural ventilation .

The building has 1 exit for evacuation directly to the street. The HA post works around the clock and involves a simultaneous stay in it of no more than 3 people. Evacuation is carried out through evacuation exits according to evacuation plans.

The explication and main characteristics of the premises are presented in Appendix 1 to this explanatory note.

3. Automatic fire extinguishing system and automatic fire alarm system.

In accordance with the Technical Assignment, the relay room and the battery room are equipped with automatic fire extinguishing systems based on domestic equipment.

The automatic fire extinguishing system is designed for automatic detection of fire sources, as well as activation of fire extinguishing means to create a concentration of fire extinguishing agent sufficient to localize and extinguish the fire in its initial stage.

Fire extinguishing units shall be operated automatically. The decision to transfer the automatic fire extinguishing unit to manual start mode must be agreed with the State Fire Supervision authorities in the field. It is allowed to switch over from automatic control mode to manual start only during the period of scheduled preventive or other operations not related to the need to disconnect the entire plant. In the latter case, the facility manager is obliged to take measures for additional fire protection, compensating for the temporary absence of automatic fire extinguishing.

The address fire RUBEZh2AM device is installed in dispatching office (room. 2, 2nd floor), which provides for round-the-clock staff duty.

The main functions of the device: reception of signals from address devices via the address communication line, actuation of remote alarm devices in case of fire, control of fire extinguishing systems at the guarded object, serviceability control of address devices, symbolic indication of received signals, sound alarm of operation modes.

This room also houses the secondary power supply source of IVEPR 12/5 K2.

See the annexes of this explanatory note for a list of directions, type of installation, method of extinguishing and calculation of HSE mass.

Gas fire extinguishing modules are installed in protected rooms on the floor in the places specified in the working drawings.

- gas fire extinguishing modules in relay type MPANVCC1230 with application of "Novec1230" OTV;

- modules of powder fire extinguishing "Buran - 8vzr." are attached in the battery room on the ceiling.

The project provides for the use of the following detectors:

- manual fire detector IPR 51310;

- fire detector optoelectronic IP 21264;

- security magnetic contact detector IO10226 isp.1 - door or window closing control.

In addition, explosion-proof equipment with intrinsically safe loops, warning and start-up lines is provided for the battery room:

- Explosion-proof interface units UPKOP13511 and UPKOP13512P;

- Remote elements of switching EMU (from UKPOP13512P set);

- Endpoints (detail views) of PU from UPKOP135 set;

- Announcers thermal for an intrinsically safe loop of IP1145A3;

- announcers magnetocontact explosion-proof IO10233;

- Brazed explosion-proof boxes KPV2 and KPV3.

All the listed instruments of the receiving and control and interface units have control of fire loops, warning and start-up lines for break and short circuit.

To avoid unauthorized release of OTV and to protect against atmospheric precipitation, the placement of remote start buttons (detectors IPR51310) is provided in IP54 boxes of YAKGR2/10 type. At the same time, the terminal block located in it must be removed from the box.

In accordance with the requirements of SP5.13130.2009, the design provides for the installation of at least three fire detectors for each room equipped with a fire extinguishing system. The number and approximate locations of the detectors are indicated on the working drawings. To organize manual start-up, manual fire detectors are installed at the exit from the guarded premises. The exact location and installation method of the detectors is determined during installation taking into account the requirements of SP5.13130.2009, RD 78.14593 and the manufacturer's technical documentation.

When one detector is activated, "Attention" signal is generated. At operation of the second announcer in a loop, the RUBEZh2AM device forms a signal "Fire", light annunciators of this direction and sound buildings in all rooms at the same time turn on. Upon completion of the set start delay from the moment of generation of "Fire" signal pulse is supplied to fire extinguishing modules.

Light warning about fire is performed automatically by annunciators - "GAS DO NOT ENTER," "GAS LEAVE," "AUTOMATION IS OFF," "POWDER DO NOT ENTER," "POWDER LEAVE," adjacent rooms are also notified.

Audible Alert - Alerts that are part of this project's alert.

In the presence of people in the protected rooms the installation is transferred to the mode of manual start-up by means of the RUBEZh2AM device and also at operation of a signaling device magnitnokontaktny, established on an entrance door, at the same time the precautionary light alarm system "Automatic Equipment Is Switched-off" turns on.

Protective grounding of all metal non-energized components of electrical equipment (including shielding elements of cable lines) and process steel elements of the fire extinguishing unit is provided according to PUE and technical documentation of equipment manufacturers.

In rooms with gas fire extinguishing, installation of the grounding circuit is provided, connection of the circuit with the circuit is carried out by wire PV3 4 sq.m.

For separation of fire compartments, fire-resistant doors are provided (refer to the assignment to the balance holder).

The project provides a reserve reserve of fire extinguishing modules. The module stock is stored in room 2 (1st floor).

4. Warning and evacuation management system.

4.1. Tasks of the warning and evacuation management system:

- detection of signs of fire in protected premises and sound signal that notifies personnel about the danger of being on the site.

- transmission of alarm message to monitoring and control panel and to backup devices;

- initiation of operation of fire warning and evacuation control systems.

4.2. EMSS equipment.

According to SP3.13130.2009, for the implementation of the warning of people in the project, 2 types of EPSS were used:

- light warning: lightning indicators "Lightning RIP" with "EXIT" inscription; safety signs in the form of labels on walls indicating the direction of movement during evacuation of people in case of fire. "Lightning Lighting220 RIP" indicators have built-in accumulator for illumination of "OUTPUT" inscription at disconnection of 220V network;

- audible warning: sirens "OP324" (AC24) - work directly from fire-fighting control modules. Light annunciators with the inscription "EXIT" are installed on the escape routes and work around the clock.

In addition, in rooms with automatic fire extinguishing, special alerts "GAS DO NOT ENTER," "GAS LEAVE," "AUTOMATION IS OFF," "POWDER DO NOT ENTER," "POWDER LEAVE" are used.

Explosion-proof equipment variants and intrinsically safe warning lines are provided for the battery room:

- Explosion-proof warning devices of category IP54 "FilinT" with corresponding mask-inscription.

- Safety light sign "Exit" of TS OExiaIICT6 from UPKOP13512P set;

- Explosion-proof sound annunciator "Shmel12" from set UPKOP13512P.

4.3. EMSS trunk service time in case of fire.

To determine the health time of trunks,

related to ECSS in case of fire, we calculate the maximum time for evacuation of personnel from the EC building.

The time required to evacuate people from the building in case of fire as per GOST 12.1.00491: sound= l/v, where l is the reduced length of the path, m; v - speed, m/min.

With a known number of evacuating people and the area of ​ ​ passage, taking the average horizontal projection area of ​ ​ an adult in winter clothes of 0.125 m ², we determine the density of human flow D = Nf/lδ, where N is the number of people; f is the average area occupied by one person; l - length of escape route; δ is the width of the escape route. In this case, the maximum distance must be covered by the personnel in the control room (pom. 2) – 25 m.

The estimated time of evacuation of people from the building is set according to the calculation of the time of movement of one or more human flows through evacuation exits from the most remote places of accommodation of people. When calculating, the entire path of movement of the human flow is divided into sections of length li and width δi. According to Table 2 of Appendix 2 to GOST 12.1.00491, depending on the intensity of human flow in each of these sections of the path, we determine the speed of human flow - 100 m/min. And then, for density D = 2 * 0,125/25 * 1 = 0.01; we have

τ = 25/100=0.25 min.

For the installation of warning lines, the EMSS selects a cable of the KPSEngFRLS series, which does not need protection from open flame (letter of the Department of Supervisory Activities of the EMERCOM of Russia No. 19254376 dated 16.12.2008). The service life of this cable in an open flame is not less than 3 hours. The cable has fire safety certificates SSPB.RU.UP001.N00551 and CRU.PB22.B.22131 .

4.4. Calculation of sound pressure of annunciators.

The location of fire sound indicators shall provide a total sound level of at least 75 dB at a distance of 3 meters from the alert, but not more than 120 dB at any point in the protected room. The alerts do not have volume controls and are connected to the alert line without detachable devices.

Sound attenuation depending on the distance to the sound source is determined in accordance with GOST 31295.22005 "Noise. Sound attenuation during propagation on the ground "and calculated by the formula:

A = 20 * Lg L

where A (dB) is the attenuation of sound in the air;

L (m) is the distance to the alert .

The signal reflected from the walls reduces attenuation, we do not take it into account.

Show that at the maximum distance between the alert and the point farthest from it at a height of 1.5 m from the floor, the requirements of Section 4 of SP 3.13130.2009 will be met.

Noise background level in all rooms does not exceed F = 55 dB in the range of 800Gts2kHz (OP324 sound annunciator operates in this range). The distance from the most distant point to the nearest alert is 8 m. For this distance, attenuation:

A = 20 * Lg 8 = 18.0 dB.

For adjacent rooms, we calculate the sound level taking into account the absorption in the partitions (doors):

The standard door from the CPD has sound level suppression in the range of 400 Hz - 2 kHz TL = 20 dB.

Noise level in office premises F = 55 dB .

A = 20 * Lg 5 = 14.0 dB.

Exceeding the sound level above the background, according to SP 3.13130.2009., must be at least D = 15 dB

Then, in order to ensure the proper sound level in the room adjacent to the alert, the sound level of the alert must be at least

S= TL+A+F+D = 20 + 18,0 + 55 + 15 = 108 дБ.

These parameters are met by OOP324 alerts.