Helicopter Final Assembly Shop. ML Cost Center OJSC

2. head and temperature plot

2.1 Heads of water heating networks at the outlet of the existing boiler house:

- in the supply pipeline of the heat supply system 57 m.v.

- in the return pipeline of the heat supply system 27 m.v.

2.2 Temperature plot of water heating networks:

- heating period of 115 - 70 wasps;

2.3 Head in the supply pipeline of the GVA system from the existing water heating pits - 30 m.v.

3. thermal network systems and diagrams

3.1 The design provides for laying of designed water heating networks to subscribers partially open, on supports, partially in the impassable channel from prefabricated elements, partially in steel sleeves.

3.2 Point of connection to existing heat networks and WCS of the designed ITP, the designed workshop of EIC and LLC Maria is located in the existing thermal chamber UT1 (t.1);

3.3 Heat metering unit is designed at the tie-in point of external heat supply networks (T1, T2) in the main heat chamber UT1.

3.4 Communication networks from the point of tie-in of UT1 (t.1) to the designed thermal chamber (UT3) are accepted above-ground, on sliding supports according to the 313.TS008.000 series, with a U-image device. compensator (K-1) at the point of intersection of the roadway (i.e. 4).

3.5 Communication networks from the designed chamber UT2 in t.8 to the entry No. 1 of the building of the workshop "Agusta Westland" (t.18) are laid on the sand base with subsequent sand filling in the impassable channel from prefabricated railway/concrete elements of factory manufacture .

3.6 Pipelines of communication networks in the area from chamber UT3 (t.13) to (t.14) are designed in steel sleeves.

4. laying of pipelines. constructions. isolation

4.1. Pipelines of thermal networks T1 and T2 on the section of the above-ground gasket are made of seamless steel pipes, hot-deformed according to GOST 873278 in the SGP of insulation in a galvanized shell according to GOST 307322006.

4.2. Pipelines of mains GVA T3 and T4 on the section of above-ground gasket are made of pipes of steel water and gas galvanized as per GOST 326275 in SGP of insulation in galvanized shell as per GOST 307322006.

4.3. Pipelines of thermal networks T1 and T2 on the underground laying section are made of seamless steel pipes, hot-deformed according to GOST 873278 in SGP of insulation in polyethylene shell according to GOST 307322006.

4.4. Pipelines of mains GVA T3 and T4 on the section of underground laying are made of pipes of steel water and gas galvanized as per GOST 326275 in SGP of insulation in polyethylene shell as per GOST 307322006.

4.5 Pipelines of communication networks laid along the basement and in chambers are designed in mineral wool insulation with metal coating for above-ground laying on supports according to series 7.903.9-2.1 (page 102106).

4.6 Installation of factory-made vents is provided on communication networks, in higher points.

4.7. On the section of communication networks from t.13 to t.14 there should be provided a device of casings under the road. In sleeves lay pipes in SGP of insulation in polyethylene reinforced shell. The pipes shall be inclined towards UT3 chamber.

4.7. In t.15 at end sections of pipelines install shut-off valves and loop the parts of pipelines T1 with T2 and T3 with T4 (refer to sheet 6).

5. thermal expansion compensation

5.1 Compensation of heat extensions of pipelines designed openly on supports is performed due to U-shaped compensators and natural angles of route rotation.

5.2 When designing underground heat networks from steel pipes, compensation of temperature deformations is provided due to route rotation angles.

5.3 Installation of compensating cushions is provided on corners with large lateral movements. The number of cushions and their location is indicated on the piping wiring diagram. Piping stresses do not exceed allowable values.

6.Qualification requirements for steel pipes

6.1 Welding of pipes and inspection of welded joints shall be performed in accordance with SNiP 3.05.0385 (paras 5.1-5.26).

6.2 Welding of joints shall be performed as per typical drawings of 5.90313 series album.

6.3 Perform welding operations on pipes with polyurethane foam insulation in polyethylene sheath with caution to avoid fire, both polyurethane foam and polyethylene sheath.

6.4 Welded joints of heat networks pipelines in SGP insulation shall undergo 100% rengoscopic inspection, for which it is necessary to draw up an act.

6.5 The pipelines for thermal networks accepted according to "Rules for the Construction and Safe Operation of steam and hot water", PB 1057303 with the water temperature of 13070 wasps and pressure of 1.6 MPas (16 kgfs/cm), belong to the IV category.

7. insulation of heat conductors

7.1 Installation of heat insulation structures and protective coatings shall be performed in accordance with SNiP 3.04.0385, SNiP 41-03-2003

7.2 Insulation of joints of pipes and assemblies of heat conductors shall be carried out according to the supplier's technology.

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

8. quality requirements for steel pipes

8.1 Welding of pipes and inspection of welded joints shall be performed in accordance with SNiP 3.05.0385 (paras 5.1-5.26).

8.2 Welding of joints shall be performed as per typical drawings of 5.903 13 series album.

8.3 Perform welding operations on pipes with polyurethane foam insulation in polyethylene sheath with caution to avoid fire, both polyurethane foam and polyethylene sheath.

8.4 Welded joints of heat networks pipelines in SGP insulation shall undergo 100% rengoscopic inspection, for which it is necessary to draw up an act.

8.5 The pipelines for thermal networks accepted according to "Rules for the Construction and Safe Operation of steam and hot water", PB 1057303 with the water temperature of 13070 wasps and pressure of 1.6 MPas (16 kgfs/cm), belong to the IV category.

9. insulation of heat conductors

9.1 Installation of heat insulation structures and protective coatings shall be performed in accordance with SNiP 3.04.0385, SNiP 41-03-2003

9.2 Insulation of joints of pipes and assemblies of heat conductors shall be carried out according to the supplier's technology.

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

10. pipeline condition monitoring system

10.1 On-line remote monitoring system (SDS) is designed to monitor humidity of the heat-insulating layer of polyurethane foam.

10.2 The system includes:

a) signal copper conductors in the heat insulating layer along the entire length of the pipeline:

- main signal conductor (conventionally tinned);

- transit conductor (pure copper);

b) terminals for connection of control devices and switching of signal conductors at control points;

c) cables for connection of signal conductors to terminals at control points, as well as for connection of signal conductors at pipeline sections with SGP rupture of insulation (isolation valves, etc.) through elements with sealed cable leads;

d) detector (stationary and portable);

11. pressure testing and washing of heat network pipes

11.1. Perform pressure testing of supply and return heat conductors in SGP of insulation alternately.

11.2. Rinse and test the heat conductors in accordance with the requirements of VSN 2995 and SNiP 3.05.0385 and in accordance with PTE POS and S RF, (item 4.12.13.)

11.3. In accordance with SNiP 3.05.03.85, heat pipelines of water thermal networks shall be tested with pressure equal to 1.25 working, but not less than 1.6 MPa (16 kgf/cm).

11.4. The maximum value of the test pressure is due to the strength characteristics of the used elements and fittings and is 2.5 MPa (25 kgf/cm2). Recommended test pressure of 2.4 MPa (24 kgf/cm).

12. construction and commissioning conditions

12.1 Perform all construction, installation and insulation works in accordance with the design under the technical supervision of the Customer by the operating organization.

12.2 Special certificates signed by the representative of the Customer - operating organization shall be drawn up for all works.

12.3 Prior to commissioning of the constructed heat network, the operation of water outlets and the quality of thermal insulation of heat pipelines shall be checked.

12.4 Before putting the heat network into operation, it must be washed from dirt, pressed in accordance with PTE POS and S of the Russian Federation, clauses 4.12.13 and 4.12.15.

12.5 Commissioning of networks completed by construction shall be carried out in strict accordance with the project requirement, SNiP 3.01.04.87 and Standard Operating Manual for Heat Networks of Municipal Heat Supply Systems MKD 402.2001.

13. energy efficiency and rational use of thermal energy

13.1 In this working design, the laying of heating networks in SGP insulation is designed, which allows to reduce thermal energy losses (more than 20%).

13.2 Pipelines shall be subjected to additional tests and specified in the certificate with execution of the relevant certificate.

13.3 Thermal insulation of pipelines, turning angles, shutoff valves and joints I complies with SNiP 41032003 standards.

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

13.5 Service life of heat networks: steel pipe in SGP insulation - 30 years.