Security fire safety is a priority on site and in production. Automatic installations fire extinguishing – a set various elements, the functional significance of which is associated with the elimination of the source of fire. One of the reliable types of fire extinguishing, in which, as fire extinguishing agent gas is used, is gas fire extinguishing.
Automatic installations gas fire extinguishing, including pipelines, sprinklers, pumps, is carried out in accordance with project documentation and work production projects.
Components of gas fire extinguishing installations and operating mechanism
The principle of operation of a gas fire extinguishing installation is associated with a decrease in the concentration of oxygen in the air associated with the entry of a fire extinguishing agent into the fire zone. In this case, the toxic effect of the gas on environment, damage is minimized to zero material assets. Gas fire extinguishing installations are a set of interconnected elements, the main of which are:
- modular elements with gas pumped inside cylinders;
- Switchgear;
- nozzles;
- pipelines.
Through the distribution device, the gas extinguishing agent is delivered to the pipeline. There are requirements for the installation and execution of pipelines.
According to GOST, high-alloy steel is used for the manufacture of pipelines, and these elements must be firmly fixed and grounded.
Pipeline testing
After installation, the pipelines are constituent elements Gas fire extinguishing installations are undergoing a number of testing studies. Stages of such tests:
- Visual external inspection (compliance of the installation of pipelines with the design documentation, technical specifications).
- Checking connections and fastenings for mechanical damage - cracks, loose seams. To check, the pipelines are injected with air, after which the release of air masses through the holes is monitored.
- Tests for reliability and density. These types of work include artificial creation pressure, while checking the elements, starting from the station and ending with the nozzles.
Before testing, the pipelines are disconnected from the gas fire extinguishing equipment, and plugs are placed in place of the nozzles. The test pressure values in pipelines must be 1.25 pp (pp - operating pressure). The pipelines are subjected to test pressure for 5 minutes, after which the pressure drops to operating pressure and a visual inspection of the pipelines is carried out.
The pipelines have passed the test if the pressure drop when maintaining the operating pressure for one hour is not more than 10% of the operating pressure. Inspection should not show the appearance of mechanical damage.
After the tests have been carried out, liquid is drained from the pipelines and purged with air. The need for testing is beyond doubt; such a series of actions will prevent “failures” in the operation of equipment in the future.
5.7.21. Identification coloring or digital designation of pipelines must comply with GOST R 12.4.026 and:
Water-filled pipelines of sprinkler, deluge and sprinkler-drencher automatic fire control systems, as well as water-filled pipelines of fire hydrants - green color or the number "1";
Air pipelines of an air sprinkler installation and sprinkler-deluge unit AUPvz-S D - Blue colour or number "3";
Unfilled pipelines of deluge AUP and “dry pipes” - blue color or alphanumeric code “3c”;
Pipelines through which only a foaming agent or a foaming agent solution is supplied - Brown color or the number "9".
5.7.22. Signal coloring in areas connecting pipelines with shut-off and control devices, units and equipment is red.
Note - At the customer's request, it is possible to change the color of the pipelines in accordance with the interior of the premises.
5.7.23. All AUP pipelines must have a digital or alphanumeric designation according to the hydraulic diagram.
5.7.24. The distinctive color of the markings indicating the direction of movement of the fire extinguishing agent is red. Marking plates and numerical or alphanumeric designations of pipelines must be applied taking into account local conditions in the most critical places of communications (at the inlet and outlet of fire pumps, at the inlet and outlet of the general piping, on branches, at joints, at shut-off devices, through which water is supplied to the main, supply and supply pipelines, in places where pipelines pass through walls, partitions, at building entrances and in other places necessary for recognizing AUP pipelines).
VSN 25-09.67-85 Rules for the production and acceptance of work. Automatic fire extinguishing systems
(approved by decision of the Ministry of Instrumentation dated September 2, 1985 N 25-09.67-85)
3.8. Pipelines and fittings of installations located at enterprises that do not have special aesthetic requirements must be painted in accordance with the requirements of GOST 12.4.026-76 and GOST 14202-69.
3.9. Pipelines and fittings of installations located at enterprises subject to special requirements to aesthetics, must be painted in accordance with these requirements, and the coating class must be at least VI in accordance with the requirements of GOST 9.032-74.
3.10. Painting of sprinklers, detectors, fusible locks, and outlet nozzles is not allowed.
GOST R 12.4.026 Signal colors, safety signs and signal markings. Purpose and rules of use. General technical requirements and characteristics. test methods.
(adopted and put into effect by Resolution of the State Standard of the Russian Federation dated September 19, 2001 N 387-st)
5.1.3. It is not allowed to use red signal color:
To designate permanently installed equipment fire protection(their elements) that do not require prompt identification (fire detectors, fire pipelines, sprinklers for fire extinguishing installations, etc.);
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Rice. 22. Device for joining pipes for welding. 1 - grips; 2 - handle.
The assembly of fittings and pipelines for welding is carried out on assembly stands and fixtures. Assembled parts are tacked by welding. Gaps, number of tacks and welding modes of shaped parts are selected depending on the wall thickness of the pipes being welded.
Pipeline elements and assemblies are assembled on a stand equipped with devices for laying, joining (Fig. 22) and tacking parts for welding. When assembling flanges for welding with pipes, you should pay attention to the perpendicularity of the flange surface to the axis of the adjacent part. The end of the pipe should extend 5-10 mm inside the flange. Before assembling flange connections for welding with pipes, temporary gaskets are installed and the flanges are secured with bolts. Assembling the unit before welding ensures that the holes in the flanges of adjacent pipes and valves match.
Electric arc manual welding is used for welding shaped parts of pipelines. Welding is carried out with metal electrodes with a protective coating. In the conditions of central workshops, it is more advisable to weld shaped parts using a semi-automatic A-547 in a carbon dioxide environment.
The number of seam layers in manual arc welding depends on the thickness of the pipe walls and the cutting angle of the edges:
The first layer of the seam must completely melt the ends of the edges of the pipes being connected. Upper layer The seam should have a smooth outline without undercuts. You should pay attention to proper organization welder’s workplace and provide him with the necessary supplies and tools. Welds are subject to visual inspection. External welding defects can be considered: deviations in the size and shape of the working section of the seam, undercuts, sagging and sagging, burns, unfilled craters, cracks, fistulas. Correction of defects in welded joints is allowed: on tubes with a diameter of up to 100 mm, if the crack length is less than 20 mm; on pipes with a diameter of 100 to 300 mm, if the crack length is less than 50 mm.
Finished products and assemblies are marked with colored paint at the end of the part and contain order, block, line or assembly numbers. Finished pipeline assemblies are stored in separate sets before being sent to the installation site.
Installation of pipelines for fire extinguishing installations.
Installation of fire extinguishing systems in cable structures power plants and other electrical premises
is carried out before laying the cable. This is done in order to avoid welding pipe lines and installing sprinklers in close proximity to power and control cables. Manufacturers should remember this fact.
Before the installation of pipelines begins, the following organizational and preparatory measures are carried out: familiarization with technical documentation; checking the readiness of the construction part for installation of pipelines; forming teams and providing them with the necessary installation tool, fixtures and rigging; obtaining supports, hangers, fittings, assemblies and parts of pipelines in the assembly and procurement areas (MZU); receipt, removal and lifting of pipes to design marks in cable structures; arrangement and preparation of workplaces, platforms and scaffolding.
Pipeline installation involves a significant amount of work rigging work. Fire extinguishing pipelines are installed in cable tunnels and mezzanines, access to which with pipes and pipeline assemblies is very difficult. Installation is carried out in rooms located at various elevations - the main building of the power plant (minus 3, plus 4, 6, 9, 14 m). 
Rice. 23. Lever winch with a lifting capacity of 1.5 tons.
When installing pipelines, use sets of tools and devices. The set includes: spanners sizes from 12 to 27 mm, socket wrenches with replaceable heads from 12 to 27 mm, chisels, crossmeisel, center punch, bench hammers 800 and 500 g, sledgehammers 4 and 8 kg, screwdrivers, bastard files, crowbar with a diameter of 10 and a length of 600 mm , metal brush, vernier calipers, plumber's compasses, tape measures 10 and 1 m long, metal ruler, plumb line, lever winch with a lifting capacity of 1.5 tons (Fig. 23), tool box, pipe wrenches, flange square, pipe clamp, level. Electrified tools are widely used - electric drills, electric grinders, electric pipe cutters. 
Rice. 24. Collapsible metal scaffolding.
When working at height in cable mezzanines, power transformers and in chemical water treatment rooms at a height of 1 m and above, inventory scaffolding and scaffolding are used. Scaffolding and scaffolding must be inspected and allowed for use by the foreman or technical manager of the site. It is recommended to use collapsible scaffolding (Fig. 24), which can be quickly assembled in narrow passages of cable mezzanines and in high rooms. When working, it should be taken into account that the scaffolding is designed for the weight of 1-2 people, and not for the weight of the pipelines being lifted.
When laying out the route, the axes and level marks of the pipelines are drawn and the installation locations of supports, sprinklers, fire extinguishing installations, and detectors are marked. Signs of axes and elevation marks are applied according to working drawings, taking into account the laid cable routes. In cable structures, it is sometimes more convenient to lay pipelines along the top of the tunnel. If such installation is a deviation from the project, then the changes are agreed upon with the customer and the design organization.
Supports, hangers and supporting structures are installed according to preliminary markings. Fixed supports and hangers are usually welded to embedded parts and steel posts reinforced concrete structures, and are attached to concrete columns on brackets. The most common way to secure pipes is with clamps. If there are structures in the cable mezzanines for installing cable shelves, trays, and ducts, the pipelines rest on pieces of channels welded to the racks of these structures. The position of the pipes is fixed with a round steel clamp welded to the channel. If the design of a fire extinguishing installation specifies a slope for the laid pipeline, then it is checked with a hydrostatic level or a special device (Fig. 25).
Rice. 25. Device for measuring pipeline slope.
1 - base; 2 - level; 3 - lever; 4 - graduation scale.
The enlarged assembly of pipes into strands and units, into blocks is carried out directly in the cable rooms.
It is recommended to center pipes with a diameter of 50 to 150 mm when assembling joints for welding in a strand using the device shown in Fig. 22. After joining, the ends of the pipes are secured by electric welding. As a rule, tack welding is carried out by assemblers, and welding is carried out by electric welders.
When enlarging units with shut-off valves, temporary gaskets are installed and all bolted connections flanges are fully tightened. To make gaskets, a special device is used, shown in Fig. 26.
When installing pipelines, it becomes necessary to lift elements onto supports at design elevations. 
Rice. 26. Device for cutting gaskets on a drilling machine.
1 - Morse cone; 2 - ruler; 3 - slider; 4 - roller knife; 5 - center.
In cable structures for lifting, it is most convenient to use lever winches with a lifting capacity of up to 1.5 tons and pulleys. Pipe strings and long units are secured and lifted by two lifting devices. Raised components and parts should be temporarily secured, and after alignment, permanent fastenings should be installed.
When laying pipes through walls and ceilings, the pipelines are enclosed in pipe sleeves or sheet steel. Pipe sections enclosed in sleeves should not have welded joints. The gaps are filled with non-combustible material, for example, mineral wool. The laid pipelines should not have bags in which water or fire extinguishing agent may remain. Flange connections must be assembled especially accurately (on gaskets and immediately to the full number of bolts). After completing the assembly and welding of the joints, the pipelines are secured to the supports.
Installation of pipe fittings is carried out in assembled form- it is already docked with ready-made pipeline units. Before installation, the fittings are inspected to ensure that no foreign objects or dirt remain in them. When installing flanged fittings, the correct selection of flanges, fasteners and gaskets is checked, as well as the position of the fittings in the direction of fluid flow (arrow). Installed before commissioning shut-off valves the valve type must be in the closed state, and the tap type must be in the open state. Drainage tubes or plugs are installed in sections of the pipeline that form bags. To remove air, fittings with taps are installed at its upper points.
When installing freon and carbon dioxide fire extinguishing pipelines, the requirements for the work are increased. The pipelines of these fire extinguishing systems are made of seamless steel pipes.
The installation of the pipeline must ensure: the strength and tightness of the connection of pipes and their connection to fittings and devices; reliability of fixing pipes to support structures and the structures themselves on the foundations; the possibility of their inspection, purging or washing.
The parts and sections of pipelines are connected by welding, as well as using flanges with bolts or threaded connections.
The minimum radius of the internal pipe bending curve must be: for steel pipes when bending them in a cold state - at least four outer diameters; for steel pipes when bending in a hot state - at least three outer diameters. There should be no folds or cracks on the curved part of the pipe; ovality in the bending areas is allowed no more than 10%.
Threads on pipes and fittings must be clean, free of burrs, stripping or incomplete threads.
Sealing of threaded connections made with couplings, elbows, tees, connecting nuts is done by winding flax fiber onto the threads, lubricated with red lead or white on drying oil.
Fittings, parts and pipes with external tapered thread, it is allowed to screw into couplings or coupling ends of fittings having an internal cylindrical pipe thread.
Flange connections of pipelines are made in compliance with the following requirements: the deviation of the perpendicularity of the flange to the pipe axis, measured along the outer diameter of the flange, should not exceed 4 MPa for pipelines with an operating pressure<40 кгс/см 2) - 1,0 мм, для трубопроводов на рабочее давление свыше 4 МПа (40 кгс/см 2) - 0,5 мм. Отверстия во фланцах под болты располагаются на равных расстояниях, смещение по болтовой окружности не более 0,5 мм. Фланцы стягиваются равномерно и параллельно друг другу с поочередным завертыванием гаек крест накрест. Размеры прокладок должны соответствовать размерам поверхности фланцев. Паронитовые прокладки перед установкой натираются с обеих сторон сухим графитом.
Electric arc welding is recommended for joining steel pipes with a wall thickness of more than 3.5 mm. Gas welding is recommended for connecting pipes with a wall thickness of less than 3.5 mm. When welding the fitting to the main pipe, the gap cannot exceed 0.5-1 mm. Welding of each pipe joint is carried out without interruption until the entire joint is completely welded. Before installation in place, each section of pipe is examined under light in order to identify and remove foreign objects.
Soldering connections of copper pipes of all diameters are made only with hard solders, for example copper-phosphorus MF-1, MF-2, MF-3. When soldering copper pipes, connections are made overlapped with one pipe flanged or butted with an external coupling.
Pipelines are laid parallel to walls, ceilings and columns. The number of turns and intersections should be minimal. Pipelines laid on one surface or structure are laid parallel to each other.
In particularly damp rooms and in rooms with a chemically active environment, pipeline fastening structures are made of steel profiles with a thickness of at least 4 mm. Structures and pipelines are coated with protective varnish or paint.
Fastening of pipelines to building structures is carried out using normalized supports
Distance between supports, m |
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Pipe material |
Pipe diameter, mm |
on horizontal sections |
on vertical sections |
Non-ferrous metal |
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and pendants. Welding pipelines directly to metal structures of buildings and structures, as well as to elements of process equipment, is not allowed. It is recommended to select the distances between pipeline supports according to the data in Table. 10.
When laying pipes of different brands in groups, a smaller distance between the fastening points is accepted.
Pipelines are laid with a slope to ensure the drainage of condensate and fire extinguishing agent residues. The slope of pipelines with a diameter of up to 50 mm must be at least 0.01, and for pipelines with a diameter of over 50 mm - 0.005. For gas pipelines, the direction of the slope is taken from the risers to the outlet nozzles; for incentive pipelines - to risers.
Pipe passages through walls and ceilings, depending on the category of adjacent rooms, are made open or sealed.
Sealing of passages is carried out during transitions from an explosion or fire hazardous area to another explosion or fire hazardous area; during transitions from an explosion or fire hazardous area to a non-explosion and non-fire hazardous area. In these cases, sealing of single pipes is carried out in sleeves or in glands installed on the side of a heated or dry room, as well as a room whose environment should not penetrate into the adjacent room.
To seal group pipe passages in the wall opening, install a steel plate with pipes or pipe seals welded into its opening. The pipelines are connected to the nozzles using threaded connections (Fig. 27).
In places where possible vibrations of pipelines occur, it is planned to install soft gaskets in the supports or install vibration dampers to change the frequency and reduce the amplitude of vibrations to values that ensure the strength and tightness of pipeline connections.
Changing the direction of a pipeline is done by bending the pipes or installing corner fittings or bends. 
Rice. 27. Group passage of pipelines through walls. 1 - wall; 2 - passage slab; 3 - pipeline; 4 - nut; 5 - coupling.
Thermal elongation of pipelines is compensated by turning the pipes, while fastening the pipes at the turning points is not allowed. When passing through expansion joints of buildings, U-shaped compensators are installed on pipelines.
When laying pipelines, permanent and detachable connections are used.
When installing detachable connections, the following must be ensured: mechanical strength sufficient to maintain the integrity of the pipeline when exposed to internal and external forces during installation, testing and during operation; ease of assembly and disassembly; the change in the internal diameter is not more than that allowed by the normals.
Detachable connections are usually used to connect pipelines in places where disassembly of the pipeline is necessary during operation and installation.
Pipe connections must not be placed on expansion joints, on curved sections, or on supporting structures. Pipe connections are allowed no closer than 200 mm from the support points.
Protective coatings are applied to a well-cleaned and degreased surface of pipes and metal structures. The film of the painted surface should be smooth, even, without gaps or wrinkles.
All external surfaces of pipelines, except threads and sealing connections of flange surfaces, are painted to protect against corrosion. Fire extinguishing pipelines are painted red in accordance with the standard “Colors of safety signal signs” (GOST 12.4.026-76).
Pipelines in fire and explosion hazardous areas are grounded at both ends. In places where pipelines are detachable joints, jumpers made of steel or copper wire are installed to ensure a reliable electrical circuit on both sides of the connection. Pipelines introduced from the outside into fire or explosive premises are grounded before entering the room.
GOST R 50680-94 STATE STANDARD OF THE RUSSIAN FEDERATION
AUTOMATIC WATER FIRE FIGHTING UNITS.
Are common technical requirements. Test methods.
ADOPTED AND ENTERED INTO EFFECT by Resolution of the State Standard of Russia dated June 20, 1994 No. 175.
1 AREA OF USE
This standard applies to newly developed and modernized automatic water fire extinguishing installations (systems) (hereinafter referred to as installations) designed to localize or extinguish and eliminate a fire and at the same time performing the functions of an automatic fire alarm.
The requirements of this standard are mandatory.
5 GENERAL TECHNICAL REQUIREMENTS
5.17 Installation of installation pipelines must be carried out in accordance with regulatory documentation, VSN 2661-01, SNiP 3.05.05, SNiP 2.04.09, approved in the prescribed manner.
7 TEST METHODS
7.16 Pipelines must be tested in accordance with the requirements of SNiP 3.05.05-84.
BUILDING REGULATIONS. TECHNOLOGICAL EQUIPMENT AND TECHNOLOGICAL PIPELINES. SNIP 3.05.05-84.
Approved by Resolution of the USSR State Committee for Construction Affairs dated May 7, 1984 No. 72.
These rules apply to the production and acceptance of work on the installation of process equipment and process pipelines (hereinafter referred to as “equipment” and “pipelines”) intended for the production, processing and transportation of initial, intermediate and final products at an absolute pressure of 0.001 MPa (0. 01 kgf/cm2) up to 100 MPa incl. (1000 kgf/cm2), as well as pipelines for supplying coolants, lubricants and other substances necessary for the operation of the equipment.
QUALITY CONTROL OF STEEL PIPELINE CONNECTIONS
4.8. Quality control of welded joints of steel pipelines should be carried out by: systematic operational control; mechanical tests of samples cut from test joints; checking the continuity of joints with the identification of internal defects using one of the non-destructive testing methods, as well as subsequent hydraulic or pneumatic tests in accordance with Section. 5 real rules. Methods for quality control of welded joints are given in GOST 3242-79.
Checking the quality of welds in category V pipelines is limited to operational control.
In cases specified in the project, welded joints made of stainless steels should be tested for susceptibility to intergranular corrosion in accordance with GOST 6032-75 and departmental regulatory documents.
4.9. Operational control should include checking the condition of welding materials, the quality of preparation of pipe ends and pipeline parts, the accuracy of assembly operations, and the implementation of the specified welding mode.
RULES FOR CONSTRUCTION AND SAFE OPERATION OF TECHNOLOGICAL PIPELINES PB 03-585-03. Approved by Resolution of the State Technical Supervision Service of the Russian Federation dated June 10, 2003 N 80).
I. GENERAL PROVISIONS
1.4. These Rules apply to designed, newly manufactured and modernized steel process pipelines intended for transporting gaseous, vaporous and liquid media in the range from a residual pressure (vacuum) of 0.001 MPa (0.01 kgf/cm2) to a nominal pressure of 320 MPa (3200 kgf/cm2) cm2) and operating temperatures from minus 196°C to 700°C and operated at hazardous production facilities.
The possibility of extending the requirements of the Rules to specific groups, categories and types of process pipelines is determined by operating conditions and, if necessary, justified by calculations and established in the project.
II. TECHNOLOGICAL PIPELINES WITH CONDITIONAL PRESSURE UP TO 10 MPa (100 KGS/CM2)
2.1. CLASSIFICATION OF PIPELINES
2.1.1. Pipelines with pressure up to 10 MPa (100 kgf/cm2) inclusive, depending on the hazard class of the transported substance (explosion, fire hazard and harmfulness), are divided into groups (A, B, C) and depending on the operating parameters of the medium (pressure and temperature) - into five categories (I, II, III, IV, V). The classification of pipelines is given in Table 1.
From Table 1: Pipeline category – V; Group B, Refractory (TG) and non-flammable substances (NG), P-calc., MPa (kgf/cm2) - up to 1.6 (16), t_calc., C - from – 40 to 120.
Conclusion: pipelines of automatic water (sprinkler) fire extinguishing installations belong to category V pipelines, therefore the quality of welds is limited by operational control of clause 4.8 of SNIP 3.05.05-84.
Modern approaches to the design and installation of fire pipelines are not so clear-cut. In order to reduce costs and simplify installation, Western and domestic manufacturers began to supply the market with pipes, fittings and adapters made of polypropylene and PVC, intended for pipelines in fire extinguishing systems. The elements of the system are connected using “cold welding,” that is, special adhesive joints. The main advantage of the technology is that the pipeline can be installed in hard-to-reach places. Moreover, the speed, efficiency and cost of work make “non-metallic” fire pipelines economically attractive.
However, the use of plastic elements in fire pipeline systems causes a controversial attitude among specialists (mostly negative). Although in accordance with the current set of rules SP 5.13130.2009 “Fire protection systems. Fire alarm and fire extinguishing installations are automatic. Design standards and rules" the use of plastic fire pipelines and individual components is permitted, but only if special fire tests are carried out in licensed organizations and with good results.
So far, few organizations have received Russian certificates of conformity and fire safety. It is not yet possible to talk about the widespread use of plastic pipelines in fire extinguishing systems. However, there are supporters of the use of plastic pipes with adhesive joints in sprinkler systems, since this technology speeds up installation and significantly reduces the cost of work. At the same time, the scope of application of plastic pipes and fittings (in the field of fire extinguishing) is limited to pipelines constantly filled with water.
The main advantage of the technology is that the pipeline can be installed in hard-to-reach places. Speed, efficiency and cost of work make “non-metallic” fire pipelines economically attractive
When designing and installing plastic sprinkler systems, increased requirements are applied: it is necessary to eliminate the presence of voids (areas not filled with water) at all stages of operation of the pipeline system.
There is another technology for arranging a sprinkler system that is even more maneuverable and easy to install than a plastic pipeline. To supply water, metal connections and connections made from braided stainless steel hoses or corrugated pipes are used. The flexible system allows you to arrange the wiring from the main pipeline to the sprinkler heads at minimal cost. In addition, the maneuverability of the system allows the pipeline to be laid in the most inaccessible places; in particular, the wiring can be easily disguised behind suspended ceilings.
However, “alternative” materials in fire extinguishing systems, although they are maneuverable and speed up installation, are quite expensive compared to metal wiring. In addition, despite the set of rules allowing the use of non-metallic sprinkler systems, (with a positive outcome of fire tests), it is necessary to obtain permission from the fire authorities. And inspectors are wary of flexible and plastic eyeliners. Therefore, the innovative approach and conservatism of firefighters can complicate or significantly slow down the installation of the system.
At the same time, there are technologies that make it possible to simplify the installation of a metal fire pipeline system and make it easier to carry out work in hard-to-reach places. According to Andrey Markov, director of the Russian division of Ridgid, it is advisable to use pipeline systems with detachable couplings.
The fact is that Russian regulations allow the use of coupling joints in fire pipelines, but this technology has not yet found widespread use. The reason is that for high-quality installation you need a convenient and effective tool for rolling gutters. The connected ends of the pipes must be scrupulously “sharpened” to fit the coupling, otherwise high-quality installation of the pipeline and trouble-free operation of the system will not be possible. Modern equipment for rolling grooves allows you to quickly process the ends of pre-cut pipes directly at the installation site of the pipeline, and even more so in the workshop.
A good set of tools makes the installation of a metal pipeline much more maneuverable: if necessary, the length of the pipe can be adjusted directly at the installation site. In addition, the tool can work with already installed pipelines, which requires a distance of at least 90 mm from the wall or ceiling. New technology allows, with the help of tools, not only to lay new fire protection systems, but also to repair existing pipelines. Moreover, when installing a pipeline, using quick-release couplings, self-centering of the connected pipes occurs. Coupled connections are very useful in cases where the fire piping system is installed in places where welding is prohibited. For example, in old wooden buildings, in existing archives and similar institutions.
Fire protection pipeline systems with detachable couplings are easy to operate and maintain, and are also very resistant to deformation and vibration loads
According to the director of the Russian division of Ridgid, fire protection pipeline systems with detachable couplings are easy to operate and maintain, and are also very resistant to deformation and vibration loads. This is especially true when a building fire is caused by an earthquake. The system operates despite deformation loads and strong vibration, and at the same time (if the pipeline installation was carried out efficiently) there is no loss of tightness in the coupling joints.
No less important is compensation for the thermal expansion of steel pipes that occurs as a result of a fire. This pipeline system, equipped with quick-release couplings, well compensates for the expansion of the fire protection pipeline.
