Premises of hydraulic fracturing (GRU), installation and testing of equipment. GRU boiler room: purpose, structure, maintenance

Gas control point (GRP)

Gas control points are used for additional purification of gas from mechanical impurities, reducing gas pressure after the gas distribution station and maintaining it at a given value, followed by uninterrupted and trouble-free supply to consumers.
Depending on the excess gas pressure at the inlet gas control points can be medium (up to 0.3 MPa) and high pressure(0.3-1.2 MPa). Hydraulic fracturing can be central (serve a group of consumers) and site (serve objects of one consumer).

hydraulic fracturing are located:

in separate buildings;
built into one-story industrial buildings or boiler rooms:
in cabinets on external walls or free-standing supports;
on coatings industrial buildings I and II degrees of fire resistance with non-combustible insulation;
on open fenced areas under a canopy

in gasified buildings, as a rule, near the entrance;
directly on the premises boiler houses or workshops where gas-using units are located, or in adjacent rooms connected to them by open openings and having at least three air changes per hour. Innings gas from GRU to consumers in other separate buildings is not allowed.

circuit diagram GRP (GRU), the purpose of the equipment.

The principle of operation of the hydraulic fracturing.

Gas through the inlet gas pipeline enters the filter, where it is cleaned of mechanical impurities, and through safety shut-off valve served in pressure regulator, where the gas pressure is reduced and kept constant, regardless of the flow rate. In the event of an increase in gas pressure after the regulator above the permissible values, for example, as a result of a malfunction of the gas pressure regulator, the safety relief valve - PSK or water seal (GZ), as a result of which excess gas pressure is discharged into the atmosphere. If the gas pressure continues to increase and the gas discharge through the PSC did not give a sufficient effect, the safety shut-off valve and gas access to the consumer through this reduction line is terminated. In order to ensure trouble-free gas supply to the consumer, even in the event of a failure of the pressure regulator, hydraulic fracturing is looped according to the outlet pressure, or an additional reduction line is installed in the hydraulic fracturing (we will return to this issue below).

It should be noted that the hydraulic fracturing scheme (without a backup reduction line) provides for a bypass line, which allows gas to be supplied and manual control of the gas outlet pressure for the period of equipment repair or Maintenance hydraulic fracturing. At the entrance and exit hydraulic fracturing gauges installed. At the entrance to industrial hydraulic fracturing or at gas metering stations, the gas temperature is measured using a thermometer. For centralized measurement of gas flow, a measuring device is installed - gas meter industrial purpose.

To reduce the gas pressure in hydraulic fracturing pressure regulators of direct and indirect action are used. In direct-acting regulators, the final pressure impulse acts on the membrane, which is connected to the throttle body through a lever device. With a decrease in the outlet pressure, the degree of opening of the throttle body increases, with an increase, it decreases. As a result, the outlet gas pressure is kept constant.
To actuate pressure regulators of indirect action, compressed air and gas with a pressure of 200-1000 kPa serve as an energy source. Indirect pressure regulators are used with an inlet pressure of more than 1.2 MPa and an outlet pressure of more than 0.6 MPa. also in Lately Increasingly, combined pressure regulators are used, which are a safety shut-off valve and a pressure regulator in one housing.

To control the inlet and outlet pressure, room temperature, door opening - modern hydraulic fracturing can be equipped with a telemetry system.

GRP (GRU) include installation: filter, safety shut-off valve PZK, gas pressure regulator, safety relief valve PSK, stop valves, instrumentation KIP, appliances gas consumption metering(if necessary), as well as the device bypass gas pipeline (bypass) with the installation of two disconnecting devices in series and a purge pipeline between them in case of equipment repair.

The second shut-off device along the gas path on bypass should provide smooth control.

For hydraulic fracturing with inlet pressure over 6 kgf/cm2 and throughput more than 5000 m 3 / h, instead of bypass provide an additional reserve control line.

Installation PZK provide before pressure regulator. PZK is designed to automatically turn off the gas supply when the gas pressure rises or falls after the regulator in excess of the established limits.

In accordance with the requirements of the regulations, the upper limit of operation PZK must not exceed the maximum working pressure of the gas after the regulator by more than 25%. The lower limit set by the project meets the requirements for ensuring sustainable operation gas burners devices, and is specified during commissioning.

Installation PSK should be provided for pressure regulator, and if available flow meter- after the flow meter.

PSK must ensure the release of gas into the atmosphere, based on the conditions of a short-term increase in pressure that does not affect industrial safety and normal operation gas equipment consumers.

Front PSK provide disconnecting devices that must be sealed in the open position.

Safety Relief Valves must ensure gas discharge when the nominal working pressure after the regulator is exceeded by no more than 15%.

Requirements of the rules for setting the trip limit PSK-15% and upper trigger limit PZK- 25% determine the order (sequence) of valve actuation first PSK,then PZK.

The rationale for this order is obvious: PSK, preventing a further increase in pressure by discharging part of the gas into the atmosphere, does not disrupt the operation of the boilers; when triggered PZK boilers turn off in an emergency.

Gas pressure fluctuations at the outlet hydraulic fracturing allowed within 10% of the operating pressure. Regulator malfunctions causing an increase or decrease in operating pressure, malfunctions safety valves, as well as gas leaks, must be repaired in an emergency.

Putting into operation pressure regulator in the event of a gas supply interruption, it should be carried out after identifying the reason for the operation of the safety shut-off valve PZK and taking corrective action.

V hydraulic fracturing purge and discharge pipelines should be provided, which are led outside to places that provide safe conditions for gas dispersion, but not less than 1 m above the eaves or parapet of the building.

It is allowed to combine purge pipelines of the same pressure into a common purge pipeline. The same requirements apply when combining waste pipelines.

V hydraulic fracturing establish showing and registering instrumentation KIP(12) to measure inlet and outlet pressure and gas temperature. If gas consumption is not accounted for, it is allowed not to provide a recording device for measuring gas temperature.

The accuracy class of pressure gauges must be at least 1.5.

Before each pressure gauge, a three-way cock or similar device must be provided for checking and shutting off the pressure gauge.

Gas control points and gas control installations
Purpose and concept.

Rice. 4.1. Schematic diagram of the gas control point (installation):
1 - safety relief valve (discharge device); 2 - valves on the bypass line; 3 - manometers; 4 - PZK impulse line; 5 - purge gas pipeline; 6 - bypass line; 7- gas flow meter; 8 - valve at the inlet; 9 - filter; 10 - safety shut-off valve (PZK); 11 - gas pressure regulator; 12 - valve at the outlet

Gas control points (GRP) and gas control units (GRU) are designed to reduce the inlet gas pressure to a predetermined outlet (working) pressure and maintain it constant, regardless of changes in inlet pressure and gas consumption. Fluctuations in gas pressure at the outlet of the hydraulic fracturing (GRU) are allowed within 10% of the working pressure. In hydraulic fracturing (GRU), gas is also cleaned from mechanical impurities, control of inlet and outlet pressure and gas temperature, protection of working pressure from increase or decrease, accounting of gas flow.
Depending on the gas pressure at the inlet, there are hydraulic fracturing (GRU) of medium (more than 0.005 to 0.3 MPa) and high (more than 0.3 to 1.2 MPa) pressure. Gas control points can be located in separate buildings, be built into one-story industrial buildings, be located in cabinets on external fireproof walls on separate supports (cabinet hydraulic distribution units).
Gas control units are located in gasified buildings directly in the premises of boiler houses or workshops where gas-using units are located, or in adjacent premises that have at least three air changes per hour and are connected to the first open opening. Gas supply from the GRU to consumers in other separate buildings is not allowed. The principal technological schemes of hydraulic fracturing and gas distribution are similar (Fig. 4.1) and further consideration is carried out only for hydraulic fracturing.
In hydraulic fracturing, three lines can be distinguished: main, bypass 6 (bypass) and working. On the main line, gas equipment is located in the following sequence: shut-off device at the inlet (valve 8) \ purge gas pipeline 5; filter 9 for gas purification from possible mechanical impurities; safety shut-off valve (PZK) 10, which automatically turns off the gas supply when the gas pressure in the working line rises or falls beyond the established limits; gas pressure regulator 11, which reduces the gas pressure on the working line and automatically maintains it at a given level, regardless of gas consumption by consumers; locking device (valve 12) at the outlet of the main line.
The bypass line has a purge gas line 5, two shut-off devices (valve 2), one of which is used to manually control the gas pressure in the working line during operation. repair work on a disconnected main line.
On the working pressure line (working line), a safety relief valve 1 (PSK) is installed, which serves to discharge gas through a discharge candle into the atmosphere when the gas pressure in the working line rises above the set limit.
The following control and measuring devices are installed in the hydraulic fracturing: thermometers for measuring the temperature of the gas and in the hydraulic fracturing room; gas flow meter 7 (gas meter, throttle flow meter); pressure gauges 3 for measuring the inlet gas pressure, the pressure in the working line, the pressure at the inlet and outlet of the gas filter.

Gas control points are installed near residential and industrial premises. In the article, we will consider the purpose, design and classification of hydraulic fracturing. We also give the basic principles for installing points and requirements for their operation.

Deciphering and types of hydraulic fracturing

Gas control point (GRP) is a complex consisting of technological equipment and mechanisms for adjusting gas pressure. The main purpose of the installation is to reduce the inlet pressure of the natural substance and maintain a given level at the outlet, regardless of consumption.

Types of hydraulic fracturing in relation to the installation site of the equipment are:

GRPSH (cabinet gas control points) - for this type, it is planned to place the corresponding equipment in a special cabinet made of fireproof materials;
GRU (gas control units) - for this type of equipment, it is mounted on a frame and located at the place where gas is used or elsewhere;
PGB (gas control block points) - with this placement, the equipment is mounted in container-type buildings, one or more;
GRP (decoding - stationary gas control points) - with this type of equipment located in specialized buildings or separate rooms, such a device is not accepted as a standard product with full factory readiness.

Classification

Hydraulic fracturing can be classified according to several parameters. For example, if possible, lowering the gas pressure. The breakdown of the hydraulic fracturing is discussed below.

Single-stage gas control points. In such systems, the gas pressure from the inlet to the working one is regulated in one stage.
Multistage gas control points. In systems with too high pressure, one regulator may not be able to cope with the reduction function. In this case, the adjustment takes place in several steps by setting one or more regulators.

According to the outlet gas pressure, which is provided by hydraulic fracturing (decoding: gas control points), installations are distinguished that provide the same or different pressure.

Also, hydraulic fracturing can be with one or two outlets. The execution of the device is left-handed or right-handed, depending on the place of gas supply.

The entry and exit of a volatile substance can be made from opposite sides of the hydraulic fracturing, on the one hand, be vertical and horizontal.

The gas pressure at the outlet of the point may vary, while hydraulic fracturing is classified:

Hydraulic fracturing reduction lines

The decoding of the hydraulic fracturing has already been given. Items can be dead ends or loops. This scheme is used for the reliability of gas supply. It consists in combining several hydraulic fracturing. It is believed that the more installations are looped, the higher the reliability of the system. A dead-end scheme is considered when it is impractical to use more than one hydraulic fracturing for gas supply to the consumer.

According to the technological schemes of hydraulic fracturing, there are:

Single line items. They are equipped with one gas reduction line.
Multithreaded. They can be equipped with two or more gas reduction lines connected in parallel. Such a device is used when trying to achieve maximum reliability and performance parameters of hydraulic fracturing.
Bypass. Reserve reduction line, which is used during the repair of the main line.

Regulators in multi-line installations can be connected in parallel or in series.

The hydraulic fracturing unit is equipped with the following equipment:

gas pressure reducer;
gas filter;
safety fittings;
stop valves;
instrumentation;
a substance input unit for gas odor;
gas heaters.

Two locking devices are installed on the reserve line, between which a pressure gauge is mounted.

single thread points

Gas control points (decoding of hydraulic fracturing) with one gas reduction line consist of: process equipment and a frame on which it is placed.

The principle of operation of such devices:

The gas passes through the inlet and enters the filter. This is where it gets cleaned up. harmful substances and impurities.
Then the gas is supplied to the pressure regulator through a safety shut-off valve, in which the pressure is regulated - lowering to the required parameters, as well as maintaining the values \u200b\u200bat the desired level.

If, when passing through the regulator, the pressure does not decrease to the standard parameters, then the safety relief valve or hydraulic seal is activated.

If the gas is not discharged, then the safety shut-off valve is activated and the gas supply to the RN-GRP is interrupted (decoding: pressure parameter at the beginning of the opening of the slam-shut valve) no more than +0.02 MPa - the normatively set value of the valve actuation (GOST R 53402-2009 8.8.2.7).

In gas control installations, regulators of both direct and indirect action can be used.

When choosing a hydraulic fracturing with one reduction line, they usually rely on the operating parameters of the regulator: throughput, inlet and outlet pressure.

Multi-strand points

Deciphering the abbreviation of hydraulic fracturing - gas control points, this has already been said, there are with one reduction line, with two or more.

Regulators on the gas pressure relief line can be installed either in parallel or in series.

The principle of operation of a multi-thread system:

One source is used for gas supply.
After entering, the gas is distributed through all hydraulic fracturing lines.
At the output, the lines are combined into one collector.

Multi-thread systems are more reliable, because if one reduction line fails, its functions can be performed by the rest. Similar actions are also performed if technical work is necessary: replacing the regulator, cleaning the filter.

The schemes are mainly used at high pressure points, for example, for supplying industrial consumers. Multi-thread systems are more expensive than single-thread counterparts, they have large dimensions.

Fracturing with bypass line

The above describes how hydraulic fracturing is deciphered and what types it happens. In this paragraph, the last option for organizing a gas control point will be presented - with a bypass.

A bypass is called a bypass, another name is a reserve, a reduction line natural gas. It is used at the time of repair of the main.

Multi-thread or single-thread circuits are endowed with a bypass line. It is equipped with the same equipment as the worker, but does not participate in the gas supply process if the main line is working.

When operating boilers with medium gas pressure, care must be taken to ensure that it meets the desired level. For this purpose, gas control units are used. In them, the gas pressure is reduced to the required limit and maintained unchanged, regardless of the network parameters.

Structure of the gas distribution plant

Reducing the gas to a working level is not the only function of the GRU. In it there is an additional filtration of the working environment, as well as accounting for gas consumption. Main installation blocks:

Filter. Designed to remove dust particles.
KPZ valve - prevents the supply of fuel when the pressure in the system is exceeded.
The pressure regulator, which performs the main function of the GRU.
PSK valve - discharges gas in cases where the excess pressure has a short duration.
Bypass line equipped with two elements of shutoff valves (inlet and outlet). Serves as a backup gas supply route to the boiler during periods of maintenance or repair.
Pipelines - waste and purge. These GRU elements serve to release air or gas.

The gas metering unit is most often equipped with a rotary meter.

Serving the GRU

Periodically, it is necessary to inspect the equipment and promptly eliminate the detected malfunctions. Main activities:

checking the gas pressure before and after the GRU, determining the pressure difference before and after the filter;
checking the positions of the elements of the safety shut-off valve;
monitoring the performance of shut-off and safety valves;
checking the tightness of connections;
monitoring the condition of the RD membranes, purging the pipes leading to the control and measuring equipment, pressure regulator and slam-shut;
adjustment of relief and shut-off valves - if necessary.

Regularly check for gas leaks. To do this, use a soap emulsion - a simple and reliable tool.

Before starting the boiler room, make sure that there is no smell of gas. One of the important security measures is the regular ventilation of the GRU premises. It is extremely important to pay sufficient attention to the inspection of glands and flanges, they must not be allowed to pass gas. The pressure at the inlet / outlet of the GRU must correspond to those specified in technical specifications equipment.

designed to reduce gas pressure and maintain it within specified limits hydraulic fracturing are located:

in separate buildings;
built into one-story industrial buildings or boiler rooms:
in cabinets on external walls or free-standing supports;
on coatings of industrial buildings of I and II degrees of fire resistance with non-combustible insulation;
on open fenced areas under a canopy

GRU are located:

in gasified buildings, as a rule, near the entrance;
directly on the premises boiler houses or workshops where gas-using units are located, or in adjacent rooms connected to them by open openings and having at least three air changes per hour. Innings gas from GRU to consumers in other separate buildings is not allowed.

circuit diagram GRP (GRU), the purpose of the equipment.

The purpose and nature of the equipment used in hydraulic fracturing and GRU are identical.

V GRP (GRU) include installation: filter, safety shut-off valve PZK, gas pressure regulator, safety relief valve PSK, stop valves, instrumentation KIP, appliances gas consumption metering(if necessary), as well as the device bypass gas pipeline (bypass) with the installation of two disconnecting devices in series and a purge pipeline between them in case of equipment repair.

The second shut-off device along the gas path on bypass should provide smooth control.

For hydraulic fracturing with an inlet pressure over 6 kgf / cm 2 and a throughput of more than 5000 m 3 / h, instead of bypass provide an additional reserve control line.

Installation PSK should be provided for pressure regulator, and if available flow meter- after the flow meter.

Front PSK provide disconnecting devices that must be sealed in the open position.

Safety Relief Valves must ensure gas discharge when the nominal working pressure after the regulator is exceeded by no more than 15%.

Requirements of the rules for setting the trip limit PSK-15% and upper trigger limit PZK- 25% determine the order (sequence) of valve actuation first PSK,then PZK.

V hydraulic fracturing purge and discharge pipelines should be provided that lead outside to places that provide safe conditions for gas dispersion, but not less than 1 m above the eaves or parapet of the building.

It is allowed to combine purge pipelines of the same pressure into a common purge pipeline. The same requirements apply when combining waste pipelines.

The accuracy class of pressure gauges must be at least 1.5.

Prior to each pressure gauge, a three-way cock or similar device shall be provided for checking and shutting off the pressure gauge.

Gas filters.

Used to purify gas mesh, hair, cassette welded filters and viscin dust collectors.

Choice filter determined by capacity and inlet pressure. Hair filters are given FV and F1.

In filters like FV gas cleaning takes place in a wire mesh cassette filled with horsehair or nylon thread. The filter material, which must be homogeneous, without lumps and bundles, is impregnated with viscin oil (a mixture of 60% cylinder and 40% diesel oils).

The end parts of the cassette are covered with wire mesh. A perforated metal sheet is installed on the outlet side of the cassette, which protects the rear (along the gas) grid from tearing and entrainment of the filter material.

Filters FG intended for GRP (GRU) with gas consumption from 7 to 100 thousand m 3 / h. Frame filter steel welded.

Feature of this filter is the presence of free space and a breaker sheet. Large particles entering filter, hit the sheet, lose speed and fall to the bottom, and small ones are caught in a cassette filled with filter material. The pressure drop across the cassette must not exceed the value set by the manufacturer.

Safety shut-off valves.

Safety shut-off valve type PKN (B) consists of a cast iron body of 1 valve type, a membrane chamber, a superstructure head and a system of levers. Inside the body there is a seat and a valve 9. The valve stem is connected to the lever 14, one end of which is hinged inside the body, and the other end is brought out with the load. To open the valve 9 with the help of the lever 14, the stem is first slightly raised and held in this position, while opening the hole in the valve and the pressure drop before and after it decreases. The lever with the load 14 is engaged with the anchor lever 15, which is pivotally mounted on the body. Impact hammer 17 is also hinged and located above the arm of the anchor lever. A membrane chamber is located above the body under the superstructure head, into which gas is supplied from the working gas pipeline under the membrane. On the top of the membrane there is a rod with a socket, into which the rocker arm 16 enters with one arm. The other arm of the rocker engages with the hammer pin.

Scheme of the safety shut-off valve type PKN (B)

1 - body; 2 - adapter flange; 3 - cover; 4 - membrane; 5 - large spring; 6 - cork; 7 - small spring; 8 - stock; 9 - valve; 10 - guide post; 11 - plate; 12 - fork; 13 - rotary shaft; 14 - lever; 15 - anchor lever; 16 - rocker; 17 - hammer

If the pressure in the working gas pipeline exceeds the upper or drops below the lower specified limits, the membrane moves the stem, disengaging the impact hammer from the rocker, the hammer falls, hits the arm of the anchor lever, disengaging its other arm from engagement with the valve lever. The valve lowers under the action of the load and closes the gas supply. The body for setting the PKN (B) to the upper limit is a large superstructure spring.

When the gas pressure in the submembrane cavity rises or falls beyond the setting, the tip moves to the left or right and the stop mounted on the lever disengages from the tip, releases the levers connected to each other and allows the axis to turn under the influence of springs. The valve closes the gas passage.

Pressure regulators.

Universal pressure regulator Kazantseva RDUK-2 consists of the regulator itself and the control regulator - the pilot.

City (inlet) pressure gas through filter 4 through tube A enters the overvalve space of the pilot. With its pressure, the gas presses the plungers of regulator I and pilot 5 to seats 2 and b; there is no pressure in the working gas pipeline. Slowly screw in the pilot glass 10.

The pressure of the compressible spring 9 overcomes the gas pressure in the supra-valve space of the pilot and the force of the spring 7 - the pilot valve opens and the gas from the supra-valve space of the pilot enters the sub-valve space and then through the connecting tube B through the throttle d1, under the regulator membrane 3. Part of the gas through the throttle d is discharged into working pipeline. Due to the continuous movement of gas through the throttle, the pressure under the regulator membrane is slightly higher than the pressure in the outlet gas pipeline.

Under the influence of the pressure difference, the membrane 3 rises, slightly opening the valve of the regulator 1 - the gas went to the consumer. We screw in the pilot glass until the pressure in the outlet gas pipeline becomes equal to the specified working one.

When the gas flow at the consumer changes, the pressure in the working gas pipeline changes, thanks to the impulse tube B, the pressure above the pilot membrane 8 changes, which lowers and, compressing the spring 9, or rising under the influence of the spring, closes or slightly opens, respectively, the pilot valve 5. At the same time, it decreases or increase the gas supply through tube B under the pressure regulator diaphragm.

For example, when the gas flow decreases, the pressure rises, the pilot valve 5 closes, and the regulator valve 1 also closes, restoring the pressure in the working gas pipeline to the set value.

With increasing flow and decreasing pressure valve pilot and regulator open a little, the pressure in the working gas pipeline rises to the set value. Block pressure regulator Kazantseva RDBC consists of three nodes: regulator 1; stabilizer 2; pilot 3.

The control valve is similar in design to the valve RDUK and is distinguished by the presence of an impulse column 4 with three control chokes.

Safety relief valves.

Safety-reset devices must ensure full opening when the specified maximum working pressure is exceeded by no more than 15%. After the release of the excess volume of gas and the restoration of the design pressure, the relief device must close quickly and tightly. The most widely used spring-loaded relief valves are of the type PSK. The valve consists of a body 1, a membrane 2 on which the valve 4 is mounted, a tuning spring 5 and an adjusting screw 6. The valve communicates with the working gas pipeline through a side branch pipe. When the gas pressure rises above that determined by the compression of the tuning spring 5, the membrane 2 together with the valve 4 opens, opening the gas outlet through the discharge plug to the atmosphere. When the pressure decreases valve under the action of the spring closes the saddle, the gas discharge stops.

Safety relief valve is installed after the regulator, if there is a flow meter - behind it. Front PSK a disconnecting device is installed, which must be sealed in the open position.

Spring PSK must be equipped with a device for their forced opening. On low-pressure gas pipelines, it is allowed to install PSK without a device for forced opening.

Cabinet control point.

Cabinet regulatory point (SHRP) technological device in a cabinet design, designed to reduce gas pressure and maintain it at a given level. Installed for gas supply to consumers low power isolated from the general system.

Price ShRP significantly lower compared to hydraulic fracturing. ShRP just like GRP, GRU should include:

locking devices before and after installation;
filter;
safety shut-off valve;
safety relief valve;
pressure regulator;
pressure gauges at the inlet, outlet, before and after the filter;
bypass line (bypass) with two disconnecting devices on it ShRP can be supplied with a heat-insulating coating internal surfaces walls, with or without heating.

Control and measuring devices in GRP (GRU).

Indicating and recording instruments are installed to measure the inlet and outlet pressure, gas temperature KIP with an electrical output signal and electrical equipment must be explosion-proof; normally placed outside or in a separate room hydraulic fracturing attached to a fireproof gas-tight wall. The inputs of the impulse line pass through the sealing device.

Gas metering devices are installed if necessary.

The accuracy class of pressure gauges must be at least 1.5. Before each pressure gauge, a three-way cock or similar device must be provided for checking and shutting off the pressure gauge.

Requirements for the GRP premises.

Building hydraulic fracturing must refer to I and II degrees of fire resistance class CO, be one-story, basementless, with a combined roof.

Accommodation allowed hydraulic fracturing built into one-story gasified industrial buildings, boiler rooms, attached to gasified industrial buildings, household buildings for industrial purposes, on the coatings of gasified industrial buildings of I and II degrees of fire resistance class CO, with non-combustible insulation and on open fenced areas, as well as in containers GRBP.

Buildings to which it is allowed to attach and build in hydraulic fracturing, must be at least II degree of fire resistance class CO with rooms of categories G and D. Building construction buildings (within the adjoining hydraulic fracturing) must be type I fireproof, gas-tight.

Building hydraulic fracturing must have a coating (combined roof) of light construction weighing no more than 70 kg / m 2 (subject to snow removal in winter).

The use of coatings from structures weighing more than 70 kg / m 2 is allowed when installing window openings, skylights or easily dropped panels with a total area of at least 500 cm 2 per 1 m 3 of the internal volume of the room.

Premises where gas control units are located GRU as well as free-standing and attached hydraulic fracturing and GRBP must meet the requirements for category A premises.

The material of the floors, the arrangement of windows and doors of the premises of the regulatory halls must exclude the formation of sparks.

Walls and partitions separating rooms of category A from other rooms should be provided with fire-prevention type I, gas-tight, they should be based on the foundation. Seams of walls and foundations of all premises hydraulic fracturing should be tied up. Brick separating walls should be plastered on both sides.

Auxiliary rooms should have an independent exit to the outside of the building, not connected with the technological room. doors hydraulic fracturing should be fireproof, opening outwards.

Installation of smoke and ventilation ducts in separating walls ( internal partitions), as well as in the walls of the building to which it is attached (within the adjoining area) hydraulic fracturing, not allowed.

The need for space heating hydraulic fracturing should be determined depending on climatic conditions.

indoors GTR natural and/or artificial lighting and natural permanent ventilation, providing at least three air exchanges per hour.

For rooms with a volume of more than 200 m 3, air exchange is carried out according to the calculation, but not less than a single air exchange in 1 hour.

The placement of equipment, gas pipelines, fittings and instruments should ensure their convenient maintenance and repair.

The width of the main passage in the premises should be at least 0.8 m.

Fire extinguishers in the room hydraulic fracturing.

1. Powder fire extinguisher 10 l with a charge of BC (E) for an area up to 200 m 2. Carbon dioxide fire extinguishers may be used in appropriate quantities.

2. A box with sand with a volume of at least 0.5 m 3.

3. Shovel.

4. Asbestos cloth or felt 2x2 m.

Start to work.

Start GRP (GRU) is a gas-hazardous job and is performed under a work permit or in accordance with the production instructions. The work is carried out by a team of workers consisting of at least two people under the guidance of a specialist.

1. Check the absence of gas pollution in the room hydraulic fracturing.

2. Check compliance with the requirements for equipment and premises. All locking devices, except for valves on the purge gas pipelines and on the discharge gas pipeline before PSK, must be closed, PZK closed, regulator pilot unloaded.

3. If available before Hydraulic fracturing (GRU) plug, remove it.

The opening of the locking devices in preparation for the launch is carried out "from end to beginning", against the gas flow. Let gas through the main line, for which:

ensure gas flow at the last unit along the gas flow;
open the disconnecting device at the entrance to the boiler room and the output on the main line;
pilot RDUK unloaded;
open PZK to pass;
ensure the operation of the pressure gauge on the filter by opening a cock (valve) on the impulse line up to the filter;
slowly open the first disconnect device;
blow the gas pipeline and close the tap on the candle;
by slowly screwing in the pilot cup, ensure the required operating pressure (cocks on the regulator's impulse lines are open);
after starting the first unit, open the valve on the impulse line of the slam-shut valve and cock the impact hammer;
check the tightness of the connections of gas pipelines and fittings.

4. Close the work permit, make a journal entry.

Refuel compressed air bottle 40 l in Moscow
block-modular steam boiler house - cost from the manufacturer