Engineering equipment, utility networks, engineering activities

Project documentation has been developed in accordance with the design hydraulic scheme of gas supply, in order to gasify consumers in accordance with the address lists of gas consumers provided by the district administration. Gas consumers are residential buildings that are in departmental or private ownership, social facilities, boiler houses. Gas supply is provided from the existing inter-settlement gas pipeline. Characteristics of natural gas: Q = 8000 kcal/m3; Y = 0,68 kg/m3; Gas pressure: high-pressure gas pipeline of category II - Р ≤ 0,6 MPa; medium pressure gas pipeline - P ≤ 0,3 MPa; Consumers of natural gas are individual and low-rise residential buildings and boiler houses. Natural gas is provided for the needs of food preparation, heating and hot water supply. Gas flow rates through distribution pipelines are determined in accordance with the design scheme. Gas consumption through the outlet gas pipelines was taken taking into account the quantity and characteristics of the installed gas-consuming equipment for the gasified building during the hours of maximum consumption and taking into account the prospective expansion for households. Gas pipelines are designed along the streets, along highways and driveways located on the lands of the municipality of the settlement, belonging to the category of lands of urban and rural settlements. The project documentation provides for the execution of work, broken down into 2 technological stages, including: 1 stage: laying a gas pipeline - a high-pressure outlet Dn110 mm in the carriageway of the street from the existing inter-settlement gas pipeline Dn315 mm, laid along the highway to the gas control point GRP No. 10; installation of hydraulic fracturing No. 10 at the intersection of the highway and the street. High-pressure hydraulic fracturing - cabinet type GSGO-MV (GRPSh-13-2VU1), design gas flow rate 988,0 Nm3/h, pressure regulator type RDG-50V, throughput capacity of the regulator at Рin = 0,45 MPa - 1700,0 m3/ h, Pout = 0,24 MPa; laying sections of distribution gas pipelines of medium pressure Dn160 mm, Dn110 mm, Dn90 mm along the street from GRP No. 10 with the installation of plugs in the highway area and in the boiler room area located and southeast of the village ***, lit. D along the highway; laying of a gas pipeline branch Dn90 mm from the design distribution gas pipeline of medium pressure Dn110 mm to the boiler house located southeast of the village ***, lit. D along the highway "with an exit from the ground; 2 stage: laying of a gas pipeline - pressure relief Dn90 mm from the existing inter-settlement gas pipeline Dn315 mm, laid along the highway to the gas control point GRP No. 11; hydraulic fracturing unit No. 11 near the highway, north-west of the village ***, lit. A. High-pressure hydraulic fracturing - cabinet type "ITGAZ MBN / 40-APA-SR-2", design gas flow rate 640,0 m3/h, regulator capacity at Рin = 0,45 MPa - 950 m3/h, Рout = 0,24 .XNUMX MPa; laying of a gas pipeline - pressure relief Dn110 mm from the existing inter-settlement gas pipeline Dn315 mm, laid along the highway to the gas control point GRP No. 12; hydraulic fracturing installation No. 12 near the highway, east of house 655, lit.A. High-pressure hydraulic fracturing - cabinet type "ITGAZ MBN / 40-APA-SR-2", design gas flow rate 607,0 m3/h, regulator throughput at Рin = 0,45 MPa - 950 m3/h, Рout = 0,24 MPa; laying of a gas pipeline - pressure relief Dn110 mm from the existing inter-settlement gas pipeline Dn315 mm, laid along the highway to the gas control point GRP No. 13; hydraulic fracturing unit No. 13 to the east of the intersection of the highway and the street. High-pressure hydraulic fracturing - cabinet type "ITGAZ MBN / 40-APA-SR-2", design gas flow rate 750,0 m3/h, regulator throughput at Рin = 0,45 MPa - 950 m3/h, Рout = 0,24 MPa; laying of gas distribution pipelines of medium pressure Dn225 mm, Dn160 mm, Dn110 mm from the design hydraulic fracturing along the streets, along the free territory; laying branches from the design distribution gas pipelines within the boundaries of the streets to consumers in accordance with the address lists. The total length of gas pipelines is 4773,95 m. Laying of gas pipelines underground and aboveground. Above-ground laying is used in the piping of cabinet gas control points and along the facade of the boiler room. The laying of underground gas pipelines is provided mainly in a closed way in accordance with the approvals of city services. The open method is used mainly when laying branches from gas distribution pipelines. The arrangement of pits for closed laying and a trench for a gas pipeline was carried out taking into account the data of engineering and geological surveys. In places with a high level of groundwater and wetlands, gas pipelines are ballasted. Underground gas pipelines of high and medium pressure are designed from polyethylene pipes in accordance with GOST R 50838-95 with a safety factor not less than 2,5 for medium pressure gas pipelines; not less than 2,8 for a high pressure gas pipeline; Aboveground gas pipelines are designed from steel electric-welded longitudinal pipes in accordance with GOST 10704-91*. Gas pipelines are equipped with shut-off valves, one-piece steel-reinforced polyethylene joints, control pipes, purge devices, insulating joints. The laying of gas pipelines in cases is designed at the intersection with highways and utilities. To indicate the places for laying underground gas pipelines, a signal tape and indicators for the location of underground utilities were used. As shutoff valves on underground gas distribution pipelines, underground valves under the carpet are designed, on above-ground and purge gas pipelines - ball valves. Factory-delivered cabinet gas control points are designed on free-standing foundations, in a fence made of mesh panels along concrete pillars and installed on hard-surfaced sites and an entrance. The hydraulic fracturing units are equipped with pressure regulators, filters, shut-off and safety fittings, purge and discharge devices. For hydraulic fracturing, an independent ground loop and lightning protection are provided. Polyethylene gas pipelines do not require corrosion protection. To protect steel gas pipelines and cases from corrosion, it is provided: anti-corrosion coating of underground sections of gas pipelines and cases of a "highly reinforced" type; two-layer paint coating of above-ground gas pipelines. insulating connections. Design documentation for the protection of cabinet gas distribution points ShRP No. 11, 12 and 13 from direct lightning strikes was developed on the basis of the design assignment. The design documentation (for ShRP No. 11) provides for the installation of a rod lightning rod with a height of H = 10 m, the installation of a ground loop consisting of 10 electrodes of angular steel (50 x 50 x 5 L = 3,0 m) connected st. strip 40 x 5 L = 70,0 m. The resistance of the grounding device at any time of the year should not exceed 15 ohms. The design documentation (for ShRP No. 12) provides for the installation of a rod lightning rod with a height of H = 10 m, the installation of a ground loop consisting of 16 electrodes of angular steel (50 x 50 x 5 L =  3,0 m) connected st. strip 40 x 5 L = 85,0 m. The resistance of the grounding device at any time of the year should not exceed 15 ohms. The design documentation (for ShRP No. 13) provides for the installation of a rod lightning rod with a height of H = 10 m, the installation of a ground loop consisting of 13 electrodes of angular steel (50 x 50 x 5 L = 3,0 m) connected st. strip 40 x 5 L = 85,0 m. The resistance of the grounding device at any time of the year should not exceed 15 ohms.