رقم الدفاع المدنى 998

General requirements for engineering services


• General requirements for engineering services

Index

 symbol  Fourth part: general requirements for engineering services
 4-1  Ventilation and central air conditioner
 4-2  Electrical extensions
 4-3  Gathering and disposing garbage
 4-4  Steam an hot water boilers
 4-5  Electrical stairs
 4-6  elevators
 4-6/4  Fire elevators
 4-6/5  Elevator case
 4-6/6  Elevators motor room
 4-6/7  Elevator cabin
 4-6/8  Supplying the elevator with electrical power
 4-6/9  Maintaining and regular inspecting for the elevators
 4-7  Fuel tanks
 4-8  Fuel tanks room
 4-9  Gaseous fuel tank
 4-10  Chimneys for disposing cooking fumes and smoke
 4-11  Ventilation and smoke discharge
 4-12  Requirements for fire protection of the central system for liquefied gas fuel used in buildings
 4-12-1  Estimate the size of the central fuel gas tank
 4-12-2  Choose the size of the central fuel gas tank
 4-12-3  Specifications of the central fuel gas tank and its equipments
 4-12-4  Selecting a location central fuel gas tank gas
 4-12-5  Fence of the central fuel gas tank
 4-12-6  Prevention requirements when using the cylinders of gas required for the central system
 4-12-7  Storage of the Cylinders of liquefied gas
 4-12-9  Liquefied petroleum gas supply through the central net.

Related to the index

 symbol  Part IV: General requirements for engineering services.
 4-12/10  Prevention requirements in the pipeline delivery of liquefied petroleum gas (extensions).
 4-12/10/2  Prevention requirements for pipeline delivery of liquefied petroleum gas.
 4-12/10/3  Prevention requirements in the selection of pipeline delivery of liquefied petroleum gas.
 4-12/10/4  Prevention requirements when supplying the stoves with delivery of liquefied petroleum gas pipes.
 4-12/11  Public precautions for preventing fire of the Central system for liquefied petroleum gas.

• Engineering services are designed and implemented in buildings to
protect them from fire, according to the terms of this section.
   
 

 4-1  Central air conditioning and ventilation:
 4-1/1  The design of the central air conditioner system contains adequate precautions to prevent the spread of fire and smoke in the channels of conditioning according to these terms.
 4-1/2  Take into account that while choosing the sites of the air coming outside related to the conditioner, that the site should not be near places or sources that have the risk of fire happening in it.
 4-1/3  It is preferred to let the distribution of the conditioner’s channels not centrally distributed, which means that should be separated into independent groups, each one related to a part of the building. As for the places that may suffer fire such as the kitchens, bathrooms, and others, they must have separate independent air conditioners.
 4-1/4  Civil defense may require in special cases the installation of an emergency key for the air conditioning in a suitable place for the help of civil defense.
 4-1/5  It is required in the buildings of closed facades and for reasons that are related to the design of the conditioner, to have windows or openings special for these facades to allow the civil defense from disposing smoke when there is fire.
 4-1/6  The main pipes of the air conditioner are considered while being in vertical or horizontal passages made up from incombustible substances as a unit preventing fire, with the presence of the adequate openings with preventive doors to fire to help in the maintenance process.
 4-1/7  When air conditioning channels to penetrate the walls or ceilings that are resistible to fire in the building, it must have a resistant degree to fire as the degree of the resisting walls, and it should close automatically by the molten link operating at temperatures ranging between (68 - 84) degrees Celsius.
 4-1/8  The pipes of the ventilation system and central conditioning with smoke detectors that work automatically to stop the system from working when it is discovered the presence of smoke, and it puts into work the exhaust fans to expel smoke out of the building.
 4-1/9  The isolating materials used in packaging the channels of the air conditioners must be incombustible with a thickness not less than 3cm. and it is not good to use combustible materials.

Figure 4-1

 4-1/10  Air conditioners channels may be packaged with an incombustible material and in special cases depending on the appreciation of the civil defense.
 4-1/10/1  The distance must be short.
 4-1/10/2  Pass through the corridors that are made from incombustible materials.
 4-1/10/3  The flexible connections of the air channels require as follows:
 4-1/10/3/1  To be a fire-resistant material for at least half an hour.
 4-1/10/3/2  Do not generate dense smoke when burned.
 4-1/10/3/3  If it was at the beginning of the tunnels near the fans it should not be longer than (25 cm).
 4-1/10/3/4  If it was at the end of channels, it must not be longer than (4 meters) and should not penetrate the wall or ceiling resistible to fire, and not to be found in a place where there is a seriousness of the outbreak of fire, such as kitchens and others.
 4-1/10/4  If the central air-conditioning system is used for heating in addition for cooling, it must abide by the conditions of preventive special for Boilers and storage and ignition of liquefied fuel.

 4-2  Electrical extensions:
 4-2/1  The standards of the extensions must be equivalent to the standards of the Electrical Ministry.
 4-2/2  The electrical extensions and installation must be generally safe in which it shouldn’t be a direct or indirect reason for fire. And the net is also provided with a protective device from electrical shocks that works automatically through any means adopted by the Ministry of Electricity.

 Table 4-2

 4-2/3  the wires with tied connections pass through safe pipes, so it doesn’t pave the way for any tampering.
 4-2/4  The electrical extensions that aren’t cover are not accepted only through narrow and short distances not more than 3m, under a condition that it must be fixed and without any linkages.
 4-2/5  Connections that feed devices and equipment must be within the protective, flexible, and well tied tubes.

Figure 4-3

 4-2/6  The extensions and devices that are found in the places where powders, liquids, or combustible gases, must not provide during operation any ignition.
 4-2/7  The bulbs found in the storage areas must be with a protective cover made of glass and net to form a barrier that prevents the transition of heat through radiation to the combustible substances.
 4-2/8  If there is a presence of an electric generator in the building it must be kept in a special room set up for this purpose of fire-resistant materials for a period of not less than four hours and isolated from the building as a separate unit and it requires the follows:
 4-2/8/1  Its entrance must be directly from the outside.
 4-2/8/2  Any holes found in it should not be related to any part of the building.
 4-2/8/3  A hole under the generator is specialized for collecting oil in case it leaked, where it will be easier to unload or clean it.
 4-2/8/4  It is desirable in this case that the oil used in the cooling process to be incombustible.
 4-2/8/5  Separate ventilation must be provided to the room.
 4-2/8/6  The provision of safety equipment required according to the requirements of civil defense.
 4-2/9  The keys and the sub-distribution boards must be set in prominent places with an affordable access.
 4-2/10  The main key and the main distribution panel are set at a suitable venue approved by the Civil Defense, with the requirement of certain conditions:
 4-2/10/1  To be near the main entrances.
 4-2/10/2  It is more preferable to be put in a room isolated from the construction and open to the outside.

Figure 4-4

 4-2/11  The guidance panel specialized in indicating towards the main and secondary keys must be set with the clarification the scope and usage for each one.
 4-2/12  Provide illuminated Ads of high-pressure that are set on the facades and roofs with a key for putting of the electricity installed in the right place so there won’t be any kind of abused usage and should be covered with glass easy to break in order to be used b the civil defense in emergencies.
 4-2/13  Provide the necessary procedures from the dangers of static electricity; through the leakage of electric shipment to the ground. These actions include the setting of an anti-lightning device in high buildings according the specifications and conditions of the Civil Defense and the Ministry of Electricity.

Figure 4-5

 4-3  Garbage collection and disposal:
 4-3/1  The rooms of the garbage collections are made up of materials are not combustible and resistant not less than four hours, and required to have a fire-resistant door at the same degree and that closes automatically.
 4-3/2  The pipe must be made of non-combustible material and fire resistant for two hours at least.
 4-3/3  Chamber garbage and the vertical pipe in large buildings are equipped of important means of automatic and manual shutdown of the pipe in emergency situations, and as directed by Civil Defense.
 4-3/4  A pipeline for transporting garbage is established in the floors of non-combustible materials and passes through the vacuum kept away from the rest of the building by fire-resistant walls.
 4-3/5  The holes of the tube that accommodate the pipeline garbage from the floors are closed by resistible doors to fire and smoke that close automatically.
 

 4-4  Steam and hot water boilers:
 4-4/1  The steam and hot water boilers are installed are maintained in accordance with the standard specifications of the Gulf countries, "the principles and requirements in testing in the steam and hot water boilers," and the special conditions required by the Civil Defense.
 4-4/2  The boiler room is more preferable to be near the outer wall of the building, and if that was not possible you must take into account when selecting the site for assessing the direction in the conduct of the blast to the least damage.
4-4/3   The boiler room is made of fire resistant materials and the resistance of not less than four hours.
 4-4/4  It is more preferable to make the entrance door of the boiler room directly from the outside, and in case that was impossible you must take into account that the room does not constitute any fire serious on the way out the main building.
 4-4/5  The boiler door must be resistible to fire for at least four hours, and it should close automatically with the fixation of a special sign on it.
 4-4/6  Ensure the adequate natural ventilation to the boiler room, according to the terms of the ventilation and smoke disposing.
 4-4/7  The electrical extensions must be of the special type that prevents flame.

 4-5  Mobile electrical elevator:
 4-5/1  The mobile electrical elevators are studied each case individually by the Civil Defense.
 4-5/2  During the installation of the elevators it must be taken into account the Non-Proliferation of smoke through openings in these stairs.
 
 4-6  Elevators:
 4-6/1  The elevators are installed, used, and maintained in accordance with the standards of the Gulf region "elevators for persons and goods" in all parts, and with the special conditions required by the Civil Defense.
 4-6/2  It is totally prevented to overload the elevator more contributions.
 4-6/3  All the elevators must return to the ground floor and opens their doors in the event of a fire.

 4-6/4  Fire elevator:
 4-6/4/1  When the building height is more than (28 meters) an elevator or more is devoted to serve the civil defense men.
 4-6/4/2  A special key for the fire elevator is set to control the fire in case of accidents, and it is stored in a locked box with a glass cover and a special sign, fixed on the wall and set in a special place on the ground floor.
 4-6/4/3  It is more appropriate to provide the elevator fire with electrical power of a different source of supply from the construction, in order for the elevator to keep on serving to serve until the elevator with the fire power during the incidents.
 
 4-6/5  Elevator case
 4-6/5/1  The elevator case, equipment room, and the transmitters are Built out of materials with at least two hours of resisting.
 4-6/5/2  The elevator case must be protected from the vertical spread of fire or smoke to other floors.
 4-6/5/3  The elevator case must overlooks in the floors to an isolating space separated from the building with walls and preventive walls to fire that are automatically closed.
 4-6/5/4  The elevator case is allowed to be found in the staircase as long as the prevention requirements for fire protection are provided.
 4-6/5/5  The elevator case should not be a part of the ventilation system in the building.
 4-6/5/6  Adequate ventilation must be provided for the disposal of smoke in the event of fire occurred in the elevator case.
 4-6/5/7  It is not allowed to use the elevator case for any purpose other than its equipment.
 4-6/5/8  It is prevented to have any openings on the elevator case other than the doors.
 4-6/5/9  It is forbidden to paint the inside walls of the elevator case with incombustible substances.
 4-6/5/10  A copy of the key of the outside door of the elevator must be handed over to the Civil Defense.

 4-6/6  The engine room of the elevator:
 4-6/6/1  An engine room must be established from non-combustible materials in accordance with the standards the Gulf region "elevators for individuals and goods"
 4-6/6/2  Prevent any openings between the engine room and elevator case, except for openings for ropes and other necessity extensions.
 4-6/6/3  Must provide adequate ventilation and lighting of the engine room.
 4-6/6/4  If the stairs of the building does not reach the level of the engine room, a fixed stairs must be provided made from incombustible materials.
 4-6/6/5  Barriers should be installed to prevent from falling on the surfaces or through the openings in the engine room.
 4-6/6/6  A closet should be set with an armed glass cover in the engine room to store hand tools for keeping tools and hand equipment such as:
 4-6/6/6/1  An instrument to operate the wheel (if it was separated from the wheel).
 4-6/6/6/2  A key to release the wheel’s brakes.
 4-6/6/6/3  Binding to anchor ropes on the pulley.
 4-6/6/6/4  The key of the outside door of the elevator case.
 4-6/6/6/5  Any tools or equipment special for operation and light maintenance of the elevator.

 4-6/7  Vehicle lift (cabin):
 4-6/7/1  The structure of the cabin and its paintings and interior covers must be of incombustible substances.
 4-6/7/2  An interior door must be installed inside the cabin in which the elevator could not work if this door was opened,
to prevent the jam of the clothes between the vehicle and the walls of the elevator.
 4-6/7/3  It must be provided with an opening at the top that allows the entrance or exit of one person, according to the standard specifications of the Gulf countries "elevators for individuals and goods."
 4-6/7/4  Vehicle must be equipped with a ventilation fan adequate for the size and capacity of the elevator.
 4-6/7/5  The elevator cabin must be equipped with guiding plates that include:
 4-6/7/5/1  Panel shows that children under the fourteenth are not allowed to use the elevator without an adult.
 4-6/7/5/2  Panel shows that smoking is not allowed inside the elevator.
 4-6/7/5/3  Panel that show the capacity of the loads and number of people that are prohibited to use the elevator.
 4-6/7/5/4  Setting the special signs of the buttons that show the using of each one.
 4-6/7/5/5  Painting shows the agent's name, telephone number, and who is responsible for maintenance and their telephone numbers in case of emergency.
 

 4-6/8  Supplying the elevator with electricity:
 4-6/8/1  Get control over the power lines that feed the elevator - with capacity and lighting - a major key ‘turn off’ (other than the key located in the engine room) at the main keys to building a "main electrical breakers for the building."
 4-6/8/2  Power lines of the elevator are linked to a special service not related to any services other than the elevator.
 4-6/8/3  Special panel must be developed to clarify the electrical key related to the elevator.

 4-6/9  Maintenance and periodic inspection of elevators:
 4-6/9/1  After the installation of the lift it must be examined and approved by the examination and inspection of a technical specialist approved by the Civil Defense, as provided for in the Gulf region specifications.
 4-6/9/2  Each elevator should be subject to all regular routine service of maintenance by authorities that have experience in maintenance of elevators and approved by the civil jurisdictions such as defense.
 4-6/9/3  The periodic maintenance and repairs and the date it is fixed is kept of in the engine room of the elevator.
 4-6/9/4  The authority responsible for the periodic maintenance is also responsible for the requests concerning the failure that occur in the elevator, and to have an available service over the (24 hours).
 4-6/9/5  Those who are responsible for periodic maintenance and those who are responsible for inspection to inform the officially authorized people in the following cases:
 4-6/9/5/1  If elevator’s maintenance contract was canceled.
 4-6/9/5/2  When the inspector notices any failure that affects on the safety of the users of the elevator.
 4-6/9/5/3  When the owner of the building forbids the maintenance work.
 4-6/9/6  Civil Defense is the reference to resolve differences that may arise between the parties concerned or breaches of these requirements.
 4-6/9/7  The owner of the building must take the necessary procedures to maintain the safety of the elevator.
 4-6/9/8  Must train people such as the official keeper of building or he elevator’s worker to operate the elevator in normal conditions, and how to act during accidents or failures, and informing the competent maintenance authority and to communicate with the civil defense during their refusal to respond to the request of maintenance.

 

 4-7  Liquid fuel tanks:
 4-7/1  It is preferred to let the liquid fuel tank buried under the ground, and if this is not possible, it must be kept in a separate room of the building where the fire protection requirements are provided.
 4-7/2  The fuel tank must be buried under the ground, and if this is not possible it must be kept in a separate room of the building where the conditions of the liquid fuel tank room are provided.
 4-7/3  The design and the delivery pipeline equipment for burning the fuel and oil in general must be in accordance with the specifications adopted by the Countries that consist the Council Cooperation of the Gulf region.
 4-7/4  In the manufacturing of the tank it is required to be installed and well précised in order not to allow the leakage.
 4-7/5  Required to deliver liquid fuel pipelines to be made of heavy-duty pipe delivery Court does not allow the leak.
 4-7/6  The delivery of liquid fuel net is provided with valves for closure in the appropriate places in which it should be accessible and obvious due to the most important and distinct signals:
 4-7/6/1  A main closure valve at the beginning of the line at the reservoir.
 4-7/6/2  A main closure valve at the device of the fuel ignition.
 4-7/6/3  Automatic valve that operate due to heat. It is installed outside the room of the ignition device of fuel order to stop feeding the fuel ignition system when the fire breaks out, and which works according to a molten link or any other appropriate means. In addition to this, a manual closure should be provided to be used when the automatic valve fail to work.
 4-7/7  It is available in the design of the fuel ignition device the fire prevention during the operation.
 4-7/8  The extensions should not be set or even pass near any source of heat.

 4-8  the room liquid fuel tank:
 4-8/1  The fixed fuel tank is preserves in a special room made of fire resistant materials and of not less than four hours. It is preferable to have the tank buried under the ground.
 4-8/2  Ensure adequate natural ventilation to the Chamber of liquid fuel at both the top and the bottom of the room to expel fumes outside the building.
 4-8/3  It is preferred to make the room opposite to the outer wall of the building.
 4-8/4  The fuel tank room must be far away from the boiler room to prevent the transition of heat.
 4-8/5  The electrical extensions must be of the anti type flame.
 4-8/6  The door of the room must be of the fire resisting type for at least four hours. And it should close automatically with fixing a special sign on it.
 4-8/7  A threshold is built on the door with an adequate height in order to form with the wall a suitable basin to preserve the stored amount of liquid with 10% more.
 4-9/6  The main and secondary closure valves must be in an obvious place easy to access to, and undergoes the acceptance of the civil defense, as well it should be provided with special signs.
 4-9/7  The gas pipes must not pass near any source of heat.
 
 4-10  Chimneys discharge cooking fumes or heating:
 4-10/1  The ovens, stoves, and other equipments for cooking or warming must be equipped with exits of the smoke to lead it to the outside.
 4-10/2  The chimneys must be made of incombustible materials, and resistible to fire.
 4-10/3  If the chimney location was within the construction site, so the inner surface must be designed to facilitate the removal of the accumulated carbon and any other deposits.
 4-10/4  If the flue was made of a metal, its thickness must be enough. And its links must be well fixed and it may be installed to the walls that surround it with firm wires.
 4-10/5  The chimney is provided with openings that have suitable sizes according to the nature of the place especially at the curves. These holes are for cleaning.
 4-10/6  The chimney must be one meter higher than the highest point in the building, and three meters more than the highest point in the surrounding buildings within a radius of 23 meters.
Meter high chimney and one of the highest points in the building and three meters above the highest point of surrounding buildings and within a radius (23) meters.
 4-10/7  The chimney must not be connected or near any combustible substances.

 

 4-11  Ventilation and smoke discharge:
 4-11/1  Take into account in the design of ventilation and disposal of smoke - the point of view of fire protection - in the following respects:
 4-11/1/1  Ventilation for the disposal of smoke in order to provide safety of persons and the protection of the building.
 4-11/1/2  Ventilation for the disposal of smoke in order to assist the civil defense to control the fire.
 4-11/1/3  Ventilation for the expulsion of vapor, gases and powders flammable.
 4-11/2  Ventilation for the safety of persons: You must ensure adequate ventilation in the way out and in any part of the building where people could meet.
 4-11/3  Special ventilation to control over the fire: You must ensure adequate ventilation for the expulsion of vapor, gases or flammable powder in order to prevent its concentration in air to the ignition or explosion points. The means of ventilation as follows:
 4-11/3/1  Pumping or supplying by ventilation localized at different locations used for storage or the operation of setting the ignition of liquids or burning gases.
 4-11/3/2  Pumping or supplying by ventilation specialized for the mechanical equipment and steam according to the protective conditions imposed on it.
 4-11/3/3  Mechanical ventilation is applied when natural ventilation is inadequate or ineffective.
 4-11/4  The natural or mechanical ventilation must be in its perfection state to ensure the effective required for the renewal of the air of the place during a certain period to a record depends on the size of the place and type of use, content, in accordance with the terms of preventive fires. And the competent engineer must supply a study when it is requested to do so.
 4-11/5  The ventilation must be natural or mechanical in all buildings.
 4-11/6  Ventilation is done according to the presence of openings at the top of the roof and which remain opened permanently. And if there was any necessary, it should be closed. They are prepared to be opened in case of fire by the following certain means or any
any other way approved by the Civil Defense.
 4-11/6/1  Automatically by a link capable of melting or warning system.
 4-11/6/2  Manual: by an easy manual mean that is set at an adequate height from the ground available to access, and it is subjected to the approval of the Civil Defense.
4-11/6/3 Covering the vents with panels that melt quickly by the heat caused by the fire in special cases determined by the Civil Defense.
4-11/6/4 The account of the ventilation system is stopped according to the international regulations and conditions of civil defense.

Figure 4-10 

 4-12  Requirements for fire protection to the central system for liquefied gas fuel used in buildings:
The extensions of gas are as extensions of the tank or cylinder or as a small gas station to the sites of the consumer. The device provided such as the tank is loaded at the same location by tanker opposite to what is done according to the portable gas cylinders that are transmitted every time for the purpose of loading.

 4-12/1  Estimate the size of the central fuel tank gas:
 4-12/1/1  The size of the reservoir is estimated by the highest withdrawal of gas per hour and the amount of stock required, as well as the area of the site in which the tank will be placed according to the conditions of security and safety.

 


The size of the reservoir in liters =  the amount of consumption in pounds per month × 1.5 
                                                          ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
                                                                                      0.7 × 1.272   
 

Where (70)% of the size used for tank = 0.7
(Maximum use is 85% of the volume of the reservoir.)
 
Note: one liter of liquefied petroleum gas = 1.272 pounds.

 4-12/2  Choose the size of the central fuel tank gas:
 4-12/2/1  The size of the reservoir is chosen according to what was estimated and compared to other sizes which range between 380 and 4.880 liter for the residential plans up till 15.000 liter for the commercial plans. it is preferred to have the size of the reservoir enough for six weeks (a month and a half) in order to provide the gas supplies without any interruption.

 

 4-12/3  Specifications of the central fuel tank gas and its equipment:
 4-12/3/1  The tank must be made according to the standard specifications whether it was from the Gulf region or international. The reservoir is provided with equipments installed on it and an area that will allow loading and using it safely. And these facilities are under the closed cover if the reservoir was at the site without a fence.
 4-12/3/2  The central fuel tank gas contains the following supplies:
 4-12/3/2/1  Counter of the gas level.
 4-12/3/2/2  A small valve through a crater (1.5 mm or less) to control the highest level of mobilization.
 4-12/3/2/3  Valve closure on the outline connected to the tank; the usage pipe and the loading tube in addition to a valve to control the withdrawal on the line of liquid gas.
 4-12/3/2/4  Vent valve and it is internal or external in a way that venting must be per cubic meters of gas per minute.
 4-12/3/2/5  A watch valve on the loading pipe if the loading point was above the surface of the reservoir, while if the loading point was at the end of the tube tied to the tank, a valve must be also set as a watching one at the end of the pipe.
 4-12/3/2/6  The counter of the gas levels allow consumers to know what percentage of the level of liquid gas.
 4-12/3/2/7  The pressure regulator primarily on the usage pipe provides the gas with the necessary pressure for the consumer. And there is a valve for the lock located between the tank and the pressure regulator put the tank off work the reservoir when needed, and this valve has a red color.

  Figure 4-11

 4-12/4  Selecting a location for the central fuel tank gas:
 4-12/4/1  In all cases, nothing should surround tank for a distance (60 cm).
 4-12/4/2  Any hole in any building must be away from the wall of the tank with at least a distance of 1.5m.
 4-12/4/3  The distance must not be less than 1.5 from the reservoirs wall to the end of the property. And this distance n=might be 60cm if there was a wall at the end of the property.
 4-12/4/4  The distance should not be less than 3m from the tank’s wall to the place where combustible materials are present.
 4-12/4/5  The distance should not be less than (3 meters) from the wall of the reservoir to the point of ignition.
 4-12/4/6  The distance should not be less than (1.5 meters) from wall of the reservoir through the public way while maintaining a distance of no less than (3 meters) from the reservoir equipment.
 4-12/4/7  The distance should not be less than (3 meters) from the reservoir equipment to the electrical equipment if it was of a type that is not required to be used in a medium ready to combust.
 4-12/4/8  The distance should not be less than (3 meters) from the equipment of the reservoir to the unprotected land aperture.
 4-12/4/9  The distance should not be less than (1.5 meters) from the wall of the tank during loading.
 4-12/4/10  The distance should not be less than (60 cm) separating between the reservoirs.
 4-12/4/11  Civil defense may during the license of construction or operating to ask for alternatives adequate protections in choosing the site of the fuel tank gas the central fuel.

Figure 4-12

 4-12/5  Fence of the central fuel tank gas:
 4-12/5/1  It is not allowed to build more than walls and that each wall should has an appropriate length in order for the horizontal distance of any possibility for the leaking of gas not less than the mentioned distances.

 4-12/6  Prevention requirements when using cylinders in the central system:
 4-12/6/1 The station should be composed of two cylinders through an orderly switch Regulator Over. But if the station was to provide multiple uses, the number of cylinders must be at least four of the large-sized with the choice of the appropriate size of a transformer. And the most widely used cylinder is that has the capacity of the (100 pounds) and capacity (50 lbs) and capacity (25 lbs) for the regular operation of Stoves.

 4-12/7  Storage of cylinders of liquefied gas:
 4-12/7/1  The cylinders must be set vertically and fixed in order not to require another protection. And the distance between the cylinder and any opening in the building less than 1m and that the cylinder’s head lower in height than the windows with (30 cm).
 

 4-12/8  The regulator of the portable liquefied gas cylinders:
 4-12/8/1  The regulator transformer connected to the cylinders through special hoses, reduce the pressure to 37 mille bar if the power of the regulator (4 kg / hour) at one stage.
Or 1.5 bar when the regulator is larger in size (40 kg / hour) and then the regulator in the second phase must lower the pressure to (37 mille bar).
 4-12/8/2  When the using cylinders are empty, the transforming regulator starts to withdrawal from the backup cylinders and tends toward isolating the empty ones.

 4-12/9  To supply with the petroleum gas through the central net.
 4-12/9/1  To supply one or more than one tank a counter should be installed with (another pressure regulator) at every point of consumption. The gas is distributed to the point of consumption with a pressure of (1.5 bar) through the first pressure regulator that starts directly after the reservoir. Then each location is provided with a second pressure regulator that contains several safety devices.
 4-12/9/2  The second pressure regulator is characterized with the providing of safety inside the building while watching the withdrawal process and gas pressure. It plays the role of the safety valve that directly shut down the gas when its pressure is changed from its regular level. And in case it failed to do its job, it is restarted by an expert technician in order for him to check for the safety of the extensions.

 4-12/10  Requirements prevention in the delivery  pipelines of liquefied petroleum gas (extensions):
 4-12/10/1  Materials
 4-12/10/1/1  It is required to have the pipes of a good brand of metal or copper in order to deliver under medium pressure (operating pressure 4 bars), and its manufacture must be according to the international standards (ISO).
 4-12/10/1/2  The distribution is in copper or metal pipes, and choosing is according to the size and this is concerning light pressure (28, 37, or 50 mille bar the operating pressure), for example, if you wanted to install short gas extensions (containing ovens) the best choice is to have the pipes made from copper with the size of 3/8 or ½ inch manufactured according to the standards. (BS 2871)
 4-12/10/1/3  You can install copper pipes used for water according to specifications (BS 2871) and this is for the internal extensions of light pressure.
 4-12/10/1/4  Galvanized iron pipes may also be used in internal extensions for light pressure for the industrial plan, commercial works, and even housework.

 4-12/10/2  Prevention requirements for delivery pipelines of liquefied petroleum gas:
 4-12/10/2/1  The interior lines are installed and kept in an obvious way at a high or low, suspended ceiling or under the ground.
 4-12/10/2/2  The pipes may be the installed in ready streams in the ground and it must be protected from corrosion by protective tape.
 4-12/10/2/3  Also it is allowed the pipe be well tied to the outer wall of the building at a high or low level to the point of consumption.
 4-12/10/2/4  In the case of crossing the wall, particularly the double wall, the pipe must pass vertically through a bigger protective tube. The gas pipes is set inside the protective tube in a way that ensures that gas will not transfer from one tube to another or from the wall or floor.
 4-12/10/2/5  Whatever the method of passing gas pipeline it must be tight accurately to the wall.
 4-12/10/2/6  In the case the gas pipeline was set directly into the hole it must be at least at a depth of (50 cm) without rocks so as not to damage the tube.

 4-12/10/3  Prevention requirements in the selection of pipeline delivery of liquefied petroleum gas:
 4-12/10/3/1  If the pipeline delivery of liquefied petroleum gas was under the ground, the distance that separates the gas pipes from other tubes should not be less than the following:
 4-12/10/3/1/2  20 cm from electrical cables.
 4-12/10/3/1/3  10 cm from any other lines.
 4-12/10/3/2  A warning net should be placed above the gas pipe.
 4-12/10/3/3  If the pipeline delivery of liquefied petroleum gas was obvious, the distance that separates the gas pipe from other tubes should not be less than:
 4-12/10/3/1  3 cm if it was parallel to the electrical wire or steam or hot water ... and so on.
 4-12/9/3/2  1 cm, if it was passes over the electrical wire or steam or hot water ... and so on.

 4-12/10/4  Prevention requirements in the connection of stoves with tubes of the liquefied petroleum gas:
 4-12/10/4/1  Stoves are connected to tubes of copper or iron with a bolt to facilitate the process of separating and joining in the future.
 4-12/10/4/2  Rubber hoses are allowed to be used after the second regulator of low-pressure, under a condition that the length of the hose must not exceed six feet (180 cm).
 4-12/10/4/3  A valve must be set for each stove device and should be near it, in order to be separated from the device itself without affecting the other stoves. This valve is subjected to the adopted standards in order to be valid for use in the liquefied gas pipes.

 

 4-12/11  General preventive Precautions for fire protection in the central system of the  liquefied petroleum gas:
 4-12/11/1  Civil defense must be notified with the precaution means against fire in the design phase of the project and in stages of implementation and before operation.
 4-12/11/2  All the extensions of the central gas should be tested through sufficient pressure-, in order to ensure that they are fully accurate and free from defects and shortcomings, before operating it with gas.
 4-12/11/3  To provide fire and alarm systems, suitable for liquefied petroleum gas, and place it in strategic locations near to the gas station.
 4-12/11/4  Setting warning signs for safety in the area around the reservoir, such as / No smoking, and expressions indicating the presence of a gas tank, and areas that do not tolerate the presence of flammable materials and so on.
 4-12/11/5  Interior kitchens must be equipped with warning devices for the leak of gas, and these devices automatically cut off gas in the event of a gas leak.