Auto Service Gasification Project

Explanatory Note

1. The project is executed on the basis of specifications No. ___ from the requirements issued ________ Construction Norms and Regulations 42012002.

2. Tie-in point - point "A" in underground gas pipeline nd at railway No. 123 PE 80 SDR11 110mm, etc. GSN 5094 LLC NPO Gazteploservice

3. The designed underground low-pressure gas pipeline from PK7 to PK11prolozhit from polyethylene pipes PE80 SDR11 63h5,8 in accordance with GOST P 5083895 with durability safety factor not less than 2.5 according to item 5.2.4. SNiP 42012002, at a distance of not less than 1.0m from LV supports and underground utilities not less than 2.0m from the foundations of buildings and structures in accordance with Table B.1 SP 421012003. The depth of the low pressure gas pipeline shall be made according to the longitudinal profile of seeker 06210 sheet 1.

4. By the beginning of the trench digging work, a written permission must be obtained for the right to perform earthworks in the area of underground communications, issued by the organization responsible for the operation of these communications (SP 421012003, p. 10.37)

5.Connection of polyethylene pipes to each other using couplings with embedded heaters, for example, on FP-2000 welding machine

6. Turn the gas pipeline using PE taps (900) and elastic bending with radius of at least 25 external diameters of the pipe.

7.Wind polyethylene pipes at ambient temperature

from 15 to + 40 wasps. At lower temperature to make welding in special shelters.

8. Start construction with complete supply of pipes and connecting parts.

9. Put the gas pipeline in the trench with a snake in the horizontal plane to compensate for temperature extensions.

10. To install the gas pipeline, use pipes and connectors having the quality certificate of the manufacturer.

11.It is not allowed to use flattened pipes for the construction of the gas pipeline, having a diameter reduction of more than 15% of the nominal and pipes with cuts and scratches with a depth of more than 0.7cm

12. Lay a low-pressure underground gas pipeline on the base of sand with a height of 10 cm and sprinkle with a layer of sand with a height of 20 cm.

13. In order to prevent mechanical damage of the polyethylene gas pipeline, during earthworks, put yellow signal tape with the inscription "GAZ" as per GOST 10354-82

14. At the crossings of the designed low-pressure gas pipeline with underground engineering communications, the gas pipeline should be enclosed in the case projecting at 2.0m to each side, put the yellow signal tape with the inscription "GAZ" according to GOST 1035482 along the gas pipeline twice at a distance of at least 0.2m between each other and at 2.0m to both sides of the intersection axis (PB 12015903, P.3.1.13).

15. The route of the designed underground gas pipeline of low pressure shall be marked with indication plates of the 193 series installed on the walls of buildings, fences, special columns at the angles of rotation, at the places of installation of the tee and plugs and at the place of tie-in.

16.Diameters of the shifted and designed gas pipeline are accepted by hydraulic calculation. Hydraulic calculation is stored in the archive of the design organization.

17. At a distance of 50 m in both directions from the axis of the underground gas pipeline

flush the sealing of the inlets and outlets of all underground communications of houses according to the GVIS normal .

18.Drill holes Dn 16mm in the pit covers of all underground utilities located at a distance of 15 m from the axis of the underground gas pipeline.

19. Install the gas pipeline in accordance with the "Safety Rules for Gas Distribution and Gas Consumption Systems. (PB 1252903) and SP 421012003g.

20. Protection zone of the underground low-pressure gas pipeline - 2.0m in both directions from the gas pipeline axis.

21. On land plots included in the protection zones of the gas pipeline. Restrictions (encumbrances) are imposed that prohibit certain actions in the protection zone in accordance with the rules for the protection of gas distribution networks approved by the Government of the Russian Federation dated November 20, 2002. №878.

22. All work on the construction of a gas pipeline at the intersection with engineering communications should be carried out only on the basis of written permits of organizations operating these communications, under the direct supervision of the persons appointed by them.

23. Completed sections of the gas pipeline shall be tested for air pressure tightness in accordance with the requirements of SNiP 421012003. SNiP 42012002.

24. The transition of the gas pipeline under the highway on the section from PC 8 to PK8 + 12.5 should be performed by the method of inclined drilling using the "Navigator" installation with installation of the case from PE 80 SDR 11 110x10.0 mm pipe with length of 16.5 m with output of the control tube under the protective device carpet.

25. Perform construction and installation works on this project.

Environmental protection

To obtain clean combustion products that do not contaminate the air pool, it is necessary to guarantee conditions that ensure the complete combustion of gas.

Temporary roads and entrances to the gas pipeline routes for the delivery of pipes and equipment should take into account the requirements to prevent damage to agricultural land. The natural layer of soil is removed and after filling the trenches is laid in place. The Customer performs restoration of sand and gravel coatings and their improvement.

Currently, much attention is paid to the control of pollution and the protection of harmful emissions of enterprises during operation. The gas pipeline may be purged during scheduled shutdowns or emergency situations. Given the negligible gas emissions from purges, the increase in concentration due to emissions does not change background pollution.

As a result of compliance with the design standards, GOST for the construction and operation of the gas pipeline, the environmental situation and the state of the air, soil and water environment in all parameters of the impact do not deteriorate.

The natural soil layer is removed, and after backfilling the trench is laid in place.

Emergency prevention activities

(PG AND EMERGENCY)

In order to prevent emergency situations, the project was carried out in accordance with the current norms and rules SNiP 42012002, SP 4210103, "Safety Rules for Gas Distribution and Gas Consumption Systems (PB 1252903) and PUE.

The project provides for the laying of a low-pressure gas pipeline in the underground version, protection of steel pipe cases from soil and electrochemical corrosion, painting of the above-ground gas pipeline; entrances to residential buildings are free.

The underground low-pressure gas pipeline is designed from polyethylene pipes, which eliminates the possibility of directing wandering currents to the gas pipeline, destruction from electrochemical and soil corrosion and creating an emergency situation and emergency situation.

Cut trees at a distance of less than 1.5 m from the axis of the underground gas pipeline (SP 421012003, Annex B, Item 17), which eliminates the possibility of damage to the gas pipeline by the root system and creating an emergency.

Blowdown of gas pipeline cavities

1. Before commissioning. prior to strength test and leak test. gas pipeline cavity must be cleaned. When cleaning the cavity of each gas pipeline or its section, it is necessary to remove soil, water and various objects accidentally falling into the construction inside the gas pipeline. As well as a surface loose layer of rust and scale.

2. Clean the gas pipeline cavity by blowing with high-speed air flow using a high-performance compressor unit of TKA80, 5 type or a reactor unit (for example, tanker trucks for LPG transportation) with air pressure of not more than 0.6 MPa.

3. The product is considered finished when a stream of uncontaminated, dry air leaves the purge gas pipeline.

4. After cleaning the gas pipeline cavity, install plugs at the ends of cleaned sections to prevent repeated contamination of the section.

5. To blow down the low pressure gas pipeline on the street __________________ in Michurinsk, a section of the PE80 SDR11 63x.5.8 pipe from PK7 to PK11 was selected.

6. If the construction company uses another blowdown method in the performance of works, coordinate it with the operating organization.

List of working drawings

Sheet Name Note

GSN 06210PZ Explanatory note of 6 sheets

GSN 0621001 Gas Pipeline Plan 1 Sheet

Seeker 0621001 Longitudinal profile 1 sheet

GSN 06210SO Equipment specification 1 sheet

List of referenced and attached documents

Designation Name

Equipment, units and parts

external gas pipelines (underground and

above ground)

1-93 Equipment, units and parts, attachment

external and internal gas pipelines.

SP42-101-2003 General Design Provisions

and construction of gas distribution systems

SP 421032003 Code of Design

and construction of gas pipelines from

polyethylene pipes

"Giproniigaz" Album of normals (typical solutions)

1996. Engineering and Construction

polyethylene pipes gas pipelines

SNiP 42012002 Gas distribution systems