Gas supply (external gas pipelines) - Hatchery with a capacity of 27 million eggs per year in Ilovlinsky district of Volgograd region

External gas pipeline

Laying of designed high pressure gas pipeline of category 2 from

tie-in points to the territory and along the territory of the hatchery to the gas riser are provided underground from polyethylene pipes GOST R 5083895 at a depth of hr = 1.3m to the top of the pipe .

The relief of the district is a hilly plain. Absolute elevations of the earth surface along the wellheads vary from 56.71 to 64.59 m.

Groundwater lies at a depth of more than 15.0 m.

Geologolithologically, soils are represented by the following engineering and geological elements (EGE):

EGE-1) soil-plant layer with a thickness of 0.10.2m;

EGE-2) light-porous sand, medium size, layer thickness 0.94.9m, practically unpowered;

EGE-3) sand of light brown color, medium size, medium degree of water saturation, layer thickness 0.82.8m, slightly pubescent;

EGE-4) loam light brown, light 1 degree of leakage, layer strength 0.55.6 m.

The gas pipeline crossing of the designed highway is provided by an open method with installation of a case of polyethylene pipe Du, mm225x20.5, L = 18.0m GOST 185992001 on the gas pipeline .

Along the gas pipeline route, identification columns are provided at the corners of the gas pipeline route.

Identification marks (columns) are installed to the right of the gas pipeline along the gas flow at a distance of 1.0m from the gas pipeline.

At t. Tie-ins and in front of the hatchery territory are installed fawnless taps Du, mm100 brand Friatek.

Laying of designed high pressure gas pipeline of category 2 from

g. The riser up to the GRPP and boiler house is provided with above-ground steel pipes GOST 1070491 * at the height of hsr = 1.12.2m to the bottom of the pipe .

Laying of the designed above-ground gas pipeline from t. "A" to t. "B" is provided together with the heating system on one supports.

Unit-module boiler house

The block-modular boiler room ABMKUP1.62 manufactured by "Professional" is a product of full factory readiness. The boiler room provides for the installation of Buderus SK6002pc boilers (one of them is standby) of 600kW each and one SK420 boiler with a capacity of 420kW .

Gas pressure reduction for boiler house is provided in GRU located inside boiler house.

Accounting of a consumption of gas on the boiler house is provided by measuring SGEKVzR0.7565/1.6 complex with the proofreader of EC 270 established in the boiler house.

In accordance with the requirements of item 11.57 of SNiP II3576 "Boiler plants" for boiler houses of the 1st category intended for operation on gas fuel, gas supply from GRP (GRU) to boilers shall be provided through two gas pipelines.

Grpsh

Two KR500 cremators are provided for incineration of waste at the hatchery site. Cremators are available with Lamborghini EM 12E low pressure gas burners.

To reduce gas pressure from high R≤0,6MPa to low P = 4.0 kPa per

hatchery territory provides for installation of cabinet-type GRP

GRPSh-A-01-SG with RDNK50 pressure regulator with two lines of reduction (one of them reserve).

Pressure regulator setting limits:

gas pressure at inlet P = 0.6 MPa;

gas pressure downstream regulator P = 4.0kPa.

Range of control of pressure of operation of the waste valve is provided on P = 4.6 kPa.

Range of setting of automatic disconnecting device actuation pressure:

- during increase of output pressure - 5.0kPa;

-at reduction of output pressure - 2.0kPa.

The maximum design gas flow rate for cremators is 25.4 m3/h.

The capacity of the pressure regulator is:

at Pinl = 0.6MPa - 800.0m3/h;

at Pinl = 0.3MPa - 500.0m3/h.

Accounting of gas flow to cremators is provided by SG-TK-D-40 measuring system installed in GRPSH.

The measuring system includes diaphragm meter BKG25T with electronic corrector TS215.

The maximum capacity of the counter is:

- 40.0 m3/h;

The minimum meter capacity is:

— 0.25m3/h.

After installation and tests the elevated gas pipelines need to be painted two layers of XB125 enamel on two layers of primer XC010.

Health and safety measures.

During the operation of the gas farm, it is necessary to organize control over the serviceability of networks and gas equipment, tools and devices, as well as the presence of safety devices and individual means that ensure safe working conditions. Workers involved in the maintenance and repair of the gas farm and the performance of gas hazardous works should be trained in safe working methods in the gas farm.

Workers must be provided with workwear, shoes, individual protective equipment, as well as other benefits in accordance with current legislation.

Organization of the gas economy service.

For continuous technical supervision of the gas industry, carrying out planned preventive inspections and repair of gas equipment and structures on them, performance of gas hazardous works in the gas industry and readiness to take measures at any time to prevent and eliminate the accident related to the operation of gas pipelines and gas equipment, there is an emergency dispatch service (ADS) at OJSC Frolovolomezhareigaz.

Operation and technical supervision of gas equipment is carried out in accordance with the "Rules for technical operation and non-hazardous equipment in the gas industry."

Training of operational personnel is carried out by the regional gas management through the maintenance system.

The quantitative composition of gas service workers is determined depending on the labor intensity of servicing the gas farm.

The operational gas service shall have telephone communication with gasified enterprises and with the emergency service of the inter-district gas station.

Testing of gas pipelines.

Tests of gas pipelines shall be carried out by the construction and installation organization in the presence of a representative of the operational organization.

According to SP 62.13330.2011 "Gas distribution systems" item 10.5, gas pipelines should be tested for air tightness.

Before testing, the gas pipeline shall be cleaned by air blowing.

Tests of the underground gas pipeline shall be carried out after installation in the trench and filling of the pipeline at 0.2 m above the upper generatrix of the gas pipeline.

Test pressure for high pressure gas pipelines:

R≤0,6 MPa is 0.75 MPa for a test duration of 24 hours (see Table 16)

After completion of tests, reduce the test pressure to atmospheric pressure, install valves, and withstand 10 minutes under working pressure.

If defects are detected, first reduce the pressure and then begin to eliminate them.

After elimination of defects it is necessary to re-perform leak test of gas pipeline.

Test results shall be recorded in the construction

passport.