Expansion of gas consumption system. Shelter. Gas supply to MDOU D/S No. 38 on the street. Kondrutsky in the hut. Shelter of Kanevsky district

3. automatic equipment

3.1 The FBW boiler is equipped with safety and control automation by the manufacturer.

Safety automation stops the gas supply to the main burner at:

- ignition burner flame extinguishing;

- absence of thrust in the chimney;

- decrease of gas pressure below 60 mm. waters. St.

4. gas pipeline protection against corrosion

4.1 Cover the underground gas pipeline from steel pipes with "very reinforced" insulation according to GOST 9.6022005 with sticky polyethylene films. by RD 153.

4.2 Cover the above-ground gas pipeline with two layers of yellow oil paint intended for external works as per GOST 829285 * for two layers of primer GF021 GOST 2512985 * taking into account the design ambient temperature of this construction area.

4.3 Cover the equipment and fasteners with two layers of yellow oil paint intended for external works as per GOST 829285 * on two layers of primer GF021 GOST 2512985 * taking into account the design ambient temperature of this construction area.

4.4 Perform work on preparation and painting of pipes for gas networks in accordance with the requirements of GOST 9.4022004 and SNiPov on the basis of the installation organization.

4.5 Enter underground utilities into basements and technical underground of buildings and structures within a radius of 50 meters from the designed underground gas pipeline, seal by the customer according to s.5.90526.08.

4.6 Polyethylene pipe pipeline does not need special corrosion protection.

4.7 Instead of the active protection of the underground part of steel inserts with a length of not more than 10.0m, it is provided to replace the soil with sand along the entire length to the entire depth of the trench.

4.8 Lay the underground polyethylene gas pipeline in the trench with a snake to compensate for temperature extensions.

The gas pipeline at the point of exit from the ground should be enclosed in the UG 20.00 SS case.

4.9 Along the route of the designed gas pipeline lay a yellow polyethylene signal tape with a width of not less than 0.2m with the indelible inscription "Caution Gas!" along the entire length of the route at a distance of 0.2m from the top of the sprinkled polyethylene gas pipeline according to PB 1252903.

4.10 At the intersection of the gas pipeline with underground communications, lay the signal tape twice along the gas pipeline at a distance of at least 0.2m between each other and at 2.0m to both sides of the crossed communication PB 1252903.

5. soil characteristics

5.1. The averaged ground conditions for the construction of the gas pipeline, according to the technical report on engineering and geological surveys performed by ZAO Leningradskagropromproekt Z. No. 31394 in 2008, are as follows:

- 0.0 - 1.4 m modern soil, fertile, hard, weakly humid dark gray subsidence;

- 1.4 - 3.0m loam heavy, dusty, brown, hard, non-sedimentary

- underground water opened at a depth of 4.0 m from the ground surface;

- normal depth of seasonal freezing of soils 0.8m;

- road-climatic zone III;

- corrosive aggressiveness of soils is medium and high;

- seismicity of construction area 6 points

6. Emergency prevention activities

6.1. The designed low pressure underground gas pipeline network is designed in compliance with all norms and requirements of SNiP 42012002 without any deviation from them.

6.2. The occurrence of emergency situations on the designed gas pipeline is unlikely, but not completely excluded. Emergency prevention measures are provided for in the design and construction of gas pipeline networks, as well as in organizations for monitoring its condition during operation.

6.3. The gas pipeline route is selected in the safest places with a permissible approximation to existing buildings and communications. The gasket guarantees its reliability.

6.4. Measures to prevent emergency situations on the gas pipeline during its operation consist mainly in the organization of constant monitoring of the state of the gas pipeline, the performance of maintenance and planned work by specialized teams or links.

6.5. Polyethylene pipes and parts belong to "hot" group as per GOST 12.1.04489, ignition temperature is higher than 3650С.

6.6. Welding of polyethylene pipes in the open air shall be performed at provision of protection against moisture and wind. The work area shall be sufficiently illuminated.

6.7. Extinguishing of burning pipes is carried out with compositions (means): carbon dioxide, foam, fire-breathing powders, sprayed water with wetting agents, nightmare. Extinguish the fire at the construction and reconstruction facility in gas masks of grade B or oxygen-insulating gas masks as per GOST 12.4.12183 and protective suits as per regulatory documentation.

6.8. In the event of natural disasters (hurricanes, cracks, floods, etc.) Kanevskayaraigaz OJSC should organize enhanced control over the state of the gas pipeline network and valves. at critical moments, the gas pipeline must be disconnected from the gas supply.

6.9. The development of measures was carried out in accordance with the requirements of SP 1110798 (the procedure for the development and composition of the section of civil defense engineering and technical measures. Measures to prevent emergency situations of construction projects) and PB 1252903. Construction Norms and Regulations of II.01.2003 "Order of Development, Coordination, Statement and Structure of Justification, Investments Construction of the Enterprises, Buildings and Constructions";

6.10. As the main measures to prevent emergency situations that ensure the safe operation of structures and gas pipelines, the following are provided:

1. Measures for the construction of underground gas pipelines have been taken taking into account temporary and constant loads in accordance with the current norms and regulations.

6.11. This list of engineering and technical measures does not exhaust the whole set of measures required during operation of the facility.

6.12. Detailed measures are developed by services operating gas pipelines during the entire life of the facility.

6.13. Upon delivery of the designed gas pipeline, the operating organization shall attach to the gas pipeline a protection zone of at least 2.0m to both sides of the gas pipeline axis in accordance with Government Decree No. 878 of November 20, 2002 "On Approval of Rules for the Protection of Gas Distribution Networks"

7. environmental protection

7.1 The solution of environmental problems consists in the definition of measures that minimize possible impacts and their consequences during the construction and operation of the facility.

7.2 In order to reduce the impact on the environment, all construction works shall be carried out within the drain strip and specially designated sites of pipe-welded and pipe-insulating bases and at all stages of the work shall be carried out measures preventing:.

1) Development of non-favorable relief-forming processes;

2) Change of natural surface runoff;

3) Sunbathing of natural vegetation;

4) Landfilling of the territory with construction and other waste;

5) Bottling of fuel and lubricants, draining of spent oil, washing of cars in not installed places.

7.3 Production waste shall be collected and stored in a metal container with subsequent removal in accordance with the established procedure to the customer's base. After completion of construction, the territory is cleaned from garbage and other waste, which are taken to the existing landfill, agreed with the district SES.

7.4 The low pressure gas pipeline shall be laid underground from polyethylene pipes with diameter 110x6.3 in dry soils at a depth of not less than 1.0m.

7.5 Prior to the start of excavation works in the locations of the existing underground communications, the project shall be agreed with the organizations operating these communications, according to safe working conditions and safety of these communications. Pits and trenches developed on the streets, in places where the movement of people and transport takes place, must be protected by protective fences, the structures of which must meet the requirements of GOST 2340778. Warning signs and inscriptions must be installed on the fences, and at night - signal lighting. In places where people pass through trenches, transitional bridges shall be installed, illuminated at night.

7.6 Filling and filling of pipes is carried out with soil of optimum humidity (70 ± 5%) in layers of thickness of 2030 cm with compaction. Soil compaction factor K = 0.92. Compaction backfilling to ground skeleton density 1.6 g/cm. It is allowed to deviate the actual (achieved) density of the soil skeleton from the design one by not more than 0.06 g/cm.

7.7 Perform earthworks taking into account the requirements of the project, SNiP 3.02.0187 "Earthworks, foundations and foundations." The results of acceptance of works concealed by subsequent works shall be executed by acts of inspection of hidden works.

7.8 When performing construction, installation and specialized works, be guided by the current safety rules and SNiP III480 "Safety in construction."

7.9 After completion of construction, the gas pipeline strip shall be cleaned and tested by pneumatic method.

7.10 The project includes measures to ensure accident-free operation of the facilities under construction.

7.11 Restoration of green spaces after construction is carried out by the customer on his own, in agreement with the earthen department of the district.

8. organization of construction

8.1. When performing construction and installation works, strictly observe the requirements of SNiP 42.012002 "Gas Distribution Systems" and "Safety Rules for Gas Distribution and Consumption Systems" PB 1252903.

8.2. Motor crane KS2561 is recommended for installation works.

8.3. Work safety and occupational safety measures throughout the construction period shall be ensured by:

- fencing of hazardous area for crane operation with clearly visible warning signs;

- prohibition of crane turning with suspended load above workplaces.

8.4. During construction, at the intersection with underground communications, it is necessary to call a representative of the relevant communications services.

8.5. At the section of the trench intersection with the existing underground communications (water supply) passing within the trench depth, filling shall be made for the current communications with low-compressible soil along the entire cross section of the trench to the height of up to half the diameter of the crossed pipeline (cable) and its containment with layer-by-layer soil compaction. The size of the top filling should, as a rule, be 2 m larger than the diameter of the crossed communication.

8.6. Remove trees in the protection area of the underground gas pipeline (2m). Fold the felled shrub at a safe distance from the structure of the shrubs and burn.

8.7. Soil dump during earthworks shall be performed in the opposite direction from residential buildings.

9. assessment of the impact of the gas pipeline on the environment

8.1. The designed gas pipeline, if it is serviceable, does not have any impact on the environment. The object of environmental protection during the construction of the gas pipeline is soil with existing green spaces.

8.2. At the construction site, pipes and polyethylene parts under atmospheric conditions are resistant to destruction, are explosion-proof, do not release toxic substances into the environment and do not have a harmful effect on the human body in direct contact.

8.3. During technical recultivation of the ground, the excavator removes the upper fertile layer according to GOST 17530685 to a depth of 0.5 m on one side of the trench, the remaining layer of land to the design elevations is developed on the other side of the trench. After laying the gas pipeline, the final filling of the trench to the design elevations is carried out by a fertile layer of land, and then by a fertile layer, the remaining soil is planned according to the terrain along the route of the gas pipeline under construction.

8.4. All construction waste (insulation pieces, metal pipes, gravel, etc.) shall be collected and removed. Exclude fuel and lubricants ingress into the soil. The operation of construction machines and mechanisms should be allowed only at the minimum permissible exhaust emissions and noise level.

8.5. The emission of exhaust gases of construction machines, as well as gases during welding operations into the atmosphere does not represent large volumes and in open space conditions does not exceed the maximum permissible concentrations of harmful substances in