Reconstruction of heating system

Contents

1. Cover Sheet

2. Project Composition

3. Volume Content

4. License

5. Terms of Reference for Working Project Development

6. Project Passport

7. List of approvals

8. Explanatory Note

General part

1.1 This project envisages the reconstruction of steel intraquartal heat networks in mineral wool insulation from the CTP to the residential building with the removal of the existing bypass and their replacement with flexible pipelines in the SGP insulation.

1.2 Design solutions are made in accordance with:

- technical assignment for development of the working design for reconstruction of the heating networks section approved by the Customer;

- specifications b/n for transfer (removal of section of separation networks).

1.4 The designed heating line is designed for heat and hot water supply of a residential building.

1.5 The proposed, working project, version of the reconstruction of the heat network is accepted as rational, with minimal transplantation, cutting down of trees and shrubs, in a new direction. The existing heating line is used as a bypass.

1.6 The working design of intra-quarter heat networks was developed on a topographic survey carried out by the State Unitary Enterprise Mosgorgeotrest, scale 1:500.

1.7 Design documentation is developed in full compliance with regulatory documents:

- SNiP 110195 Instruction on the composition, procedure for development, approval and approval of design and estimate documentation for the construction of enterprises, buildings and structures ;

- SNiP 2.070189 * Urban planning. Planning and development of cities, towns and rural settlements. Design Standards;

- JV 411072004 Code of Rules for Design and Construction. Design and installation of underground hot water pipelines from PES pipes with thermal insulation and polyurethane foam in polyethylene shell;

- SNiP 2.04.0786 * Heat networks. Design Standards;

- SNiP 2.04.1488 Thermal insulation of equipment and pipelines;

- SNiP 41.022003 Thermal networks;

- SNiP 3.05.0485 External networks and structures of water supply and sewerage;

- SniP 3.05.0185, SP 401022000 Design and installation of underground pipelines from PES pipes with thermal insulation from polyurethane foam in polyethylene shell taking into account operational and design features of flexible pipelines.

- MDC 402.2001 Typical instruction for technical operation of heating networks of municipal heat supply.

- Rules for organization and production of earthworks and construction works in the city of Moscow;

- Rules for technical operation of thermal power plants and Safety Rules for Operation of Heat-Consuming Plants and Heat Networks of Consumers.

. process part

1. HEAT NETWORK ROUTE. GASKET METHODS AND TYPES

1.1 The heat network is designed from the pipelines "Isoproflex A" 2Dy 80 for heating, "Isoproflex A" Dy 100 and "Isoproflex" Dy 80 for hot water supply, insulated with polyurethane foam in a factory-made polyethylene shell in an impassable monolithic channel, laid on a sandy base, with sand filling.

Pipelines shall be laid underground in non-flow channel with sand filling:

- t.1-t.5, t.6-t.8, in monolithic chanceless channel 1580x600 (h);

- t.5-t.6 in monolithic channel 1160x630 (h);

- t.8-t.9, t.10-t.11 in monolithic chanceless channel 1800x670 (h);

- t.9-t.10 in case 4d273x7.

For sand base and clogging use natural sand GOST 873693 of the first or second class with size modulus 33.5 with filtration coefficient not less than 5 m/day, size of granules not more than 16 mm should not contain large sand particles with sharp edges, which can harm the protective layer of pipelines and couplings. After backfilling, the sand must be tamped. It is important that the heat lines laid in the sand are provided with uniform friction between the outer shell pipeline and the soil;

1.2 For emptying of heat pipelines for the period of repair or in case of emergency it is provided to install after t.11 ball valves for air discharge 3Dy15 and Dy20, and in t.1 ball valves of drain lines 4Dy 40. Water lowering is provided in the pit with subsequent pumping out (see construction part in t.1).

1.3 Transportation of pipes and components to SGP of insulation shall be performed at ambient air temperature-round not lower than 15 ° С, installation - at ambient air temperature not lower than -10 ° С

1.4 This project envisages termination of joints of heat pipelines of flexible pipelines with steel by means of pressing joint for welding "MFL1000M" (MFL JONTEK), the technology of which was developed by Mosflowline and agreed with operating organizations. Before backfilling of the route, it is necessary to draw up an act for closing joints.

1.5 The existing bypass is dismantled in accordance with paragraph 6.29 of the Rules for the Organization and Production of Earthworks and Construction Works in the City of Moscow, approved by Decree of the Government of Moscow No. 207 of March 17, 1998.

2. COMPENSATION OF HEAT CONDUCTORS.

1.6 When designing intra-quarter underground heat networks, special temperature strain compensators are not required.

1.7 Installation of fixed supports is provided in places required by compensation conditions. Fixed supports (HO, HO1) are installed along the heating network route at the entrance to the building t.11 and the outlet from the central heating system in t.1 to limit flexible pipelines from forces arising in steel pipelines to which they are connected.

1.8 Replacement of design solutions for supply by Mosflowline Company for supply of pipes and components from ABB or other companies shall be agreed with the design organization.

Quality requirements for steel and pe pipes.

3.1 Welding of pipes and inspection of welded joints shall be performed in accordance with SNiP 3.05.0385 "Thermal networks" (item 5.1-5.26).

3.2 Welding of joints should be performed according to typical drawings of the album of the 5.903 series - 13 issue of the I Institute A.F. "Energy installation project."

3.3 Joints of flexible pipelines from sewn PE to SGP insulation shall be tested for strength and density by hydraulic method. Test results shall be recorded in the work log.

4. INSULATION OF THERMAL CONDUCTORS

4.1 Thermally insulated pipes, for thermal network laying, with polyurethane foam insulation in polyethylene sheath are supplied by Mosflowline.

4.2 Insulation of joints of pipes and shaped elements shall be performed according to Mosflowline technology.

4.3 Perform pneumatic tests of their density before filling of joints with polyurethane foam.

4.4 Installation of thermal insulation structures and protective coatings shall be carried out in accordance with the requirements of SNiP 3.04.03.85 and SNiP 2.04.1488.

5. HEATING AND WASHING OF HEAT NETWORK PIPES

5.1 Pressure testing of supply and return pipelines shall be performed alternately.

5.2 Testing and washing of pipelines shall be carried out in accordance with the requirements of SNiP 2.04.01, SNiP 3.05.03 and SP 40102. Piping shall be subjected to a preliminary and final strength and density test.

5.3 Preliminary strength and density tests of pipelines shall be performed hydraulically.

5.3 The preliminary test hydraulic pressure during the strength test performed before the final filling of the pipeline, heat insulation of the joints and installation of valves shall be equal to 1.5 working pressure and maintained by pumping water at this level for 30 minutes. After that, the test pressure is reduced to the working pressure, which is maintained for 30 minutes, and the pipeline connections are inspected. Test results shall be recorded in the work log. To allow external inspection of welded joints, hydraulic testing of pipelines shall be performed before insulation of joints.

5.4 Final test hydraulic pressure during density tests performed after heat insulation of pipe joints and final filling of pipelines shall be equal to 1.25 working pressure but not less than 16 kgf/cm2, and for GVA pipelines - 1.25 working pressure.

5.5 The final test shall be carried out in the following order:

- pressure equal to working pressure is created in the pipeline and maintained by pumping water for 2 hours;

- the pressure is raised to the test level and maintained under-pumping water for 2 hours.

The pipeline shall be deemed to have passed the final test if the pressure drop does not exceed 0.02 MPa at the subsequent 2-hour exposure under test pressure within 1 hour.

The pipeline and its components shall be considered to have passed the hydraulic test if no leaks, sweating in welded joints and in the main metal, visible residual deformations, cracks or signs of rupture are found.

5.6 Pipelines of water networks of open heat supply systems and hot water supply networks shall be washed with drinking quality water by hydropathetic method until complete clarification of washing water. At the end of washing, pipelines shall be disinfected by filling them with water with active chlorine content of 75100 mg/l with contact time of at least 6 h. Pipelines with diameter up to 200 mm and length up to 1 km are allowed, in agreement with local authorities of the sanitary and epidemiological service, not to undergo chlorination and limit themselves to washing with water that meets the requirements of GOST 287482.

After flushing, the results of laboratory analysis of flushing water samples shall comply with the requirements of GOST 287482. A conclusion is drawn up by the sanitary and epidemiological service on the results of washing (disinfection).

Construction structures

6.1. Laying of pipelines (CT, GVA) is provided underground in a non-passing monolithic railway channel with sand filling using concrete preparation, due to low soil resistance, with sand base filling.

6.2. When designing a thermal network from PE pipes in polyurethane insulation foam in a polyethylene shell, the materials of the Mosflowline album were used.

6.4 Structures of fixed supports in Section 1 are designed in accordance with NTS 63-92-33

6.5 For other building structures, refer to T.3.

Construction and commissioning conditions

7.1. All construction, installation and insulation works shall be performed in accordance with the project under the technical supervision of the Customer - operating organization.

7.2. Special certificates signed by the Owner - the operating organization - shall be drawn up for all works (drainage arrangement, termination of the joints of the isolation control and control panel).

7.3. Before putting the built heat network into operation, the operation of water outlets and the quality of thermal insulation of heat pipelines must be checked.

7.4 Heat network pipelines shall be cleaned before commissioning after installation or overhaul: water networks in closed heat supply systems and condensate pipelines - hydro-pneumatic flushing; water networks in open heat supply systems - hydro-pneumatic washing and disinfection with subsequent repeated washing with drinking water. After disinfection, rinsing must be carried out until the indicators of the discharged water are reached, which correspond to sanitary standards for drinking water.

7.5 Acceptance of the thermal network for operation shall be carried out in strict accordance with SNiP 3.01.04.87, SP 40102 and Standard Operating Manual for Thermal Networks of Municipal Heat Supply Systems MKD 402.2001.

Energy efficiency and thermal energy management

8.1. In this working design, the gasket in the impassable backfill channel of heat networks from sewn PE with polyurethane foam insulation in the polyethylene casing of the factory is designed, the advantage over the previously used gaskets is in saving thermal energy (more than 20%).

8.2. Pipelines shall be subjected to additional tests and specified in the certificate with the corresponding certificate.

8.3. Thermal insulation of pipelines, turning angles, shutoff valves and joints comply with the norms and change No. 1 to SNiP 2.04.1488 adopted by Resolution No. 1880 of 31.12.97 by the State Committee of R.F. on Housing and Construction Policy.

8.4. Thermal insulation is protected against moisture ingress by waterproof polyethylene shell.

8.5. Service life of heat networks:

- "AMFL Isoproflex" pipe - 50 years.

- "IsoproflexIFF" pipe - 50 years.

9. GEOTECHNICAL CONSTRUCTION CONDITIONS

9.1. Characteristics of soils opened during trench development are given in the conclusion on engineering and geological conditions of construction on the sheet of longitudinal profile of the route (see sheet No. 4).

9.2. Underground water lies above pipeline laying elevations.

10. WATER REMOVAL

10.1 Water outlet from the lower points of the heat network is carried out to the VG-15 well (see construction part).

10.2 Drain valves are installed in t. 1.

Note:

All other information on construction structures, requirements to quality of steel pipes and their welding, insulation of heat pipelines, washing of heat network and conditions of construction and commissioning, refer to drawings of HW sets.

11. RESTORATION OF GREEN SPACES

11.1. The working design provides for cutting down and transplanting of green spaces falling into the construction work area. After the construction is completed, landscaping is provided in the work area.

11.2. For the number of trees to be cut down and transplanted, the place of the garden and the improvement of the zone, see the volume "Project of dendrology."

12 ORGANIZATION OF CONSTRUCTION

12.1. The working design of the construction organization was developed on the basis of hydrogeological data of the State Unitary Enterprise Mosgorgeotrest and the working design of the thermal network.

12.2. The working design of the construction organization provides for the fencing of the working zone, the arrangement of detours, the attachment of trenches, the mechanisms used during construction, and the amount of excavation work (see volume 4 of the PIC.).

12.3. The list of regulatory documents is given in the general instructions to the section of the thermal network.

12.4. The working draft was agreed with all interested organizations without comment.

12.5. The working project has been completed in full.

12.6. The composition and content of the working design corresponds to SNiP 110195.

12.7. The working project carried out environmental protection measures in accordance with the letter of the USSR Gosstroy of 11.05.86. NO.: AD240520.