Distance in the light. Minimum clear distance between pipelines and building structures Minimum distances between communications

SNiP 41-02-2003

APPENDIX B (mandatory)

Table B.1 - Vertical distances

Notes (edit)
1 The deepening of heating networks from the surface of the earth or road surface (except for highways of I, II and III categories) should be taken at least:
a) to the top of the overlap of channels and tunnels - 0.5 m;
b) to the top of the chamber overlaps - 0.3 m;
c) to the top of the shell of channelless laying 0.7 m. In the impassable part, overlappings of chambers and ventilation shafts for tunnels and canals protruding above the ground are allowed to a height of at least 0.4 m;
d) at the input of heating networks into the building, it is allowed to take deepenings from the ground surface to the top of the overlap of channels or tunnels - 0.3 m and to the top of the shell of channelless laying - 0.5 m;
e) with a high level of groundwater, it is allowed to provide for a decrease in the depth of the deepening of channels and tunnels and the location of ceilings above the earth's surface to a height of at least 0.4 m, if the conditions for the movement of transport are not violated.
2 In case of above-ground laying of heating networks on low supports, the clear distance from the ground surface to the bottom of the thermal insulation of pipelines should be, m, not less than:
with a group of pipes width up to 1.5 m - 0.35;
with a pipe group width of more than 1.5 m - 0.5.
3 When laying underground, heating networks at the intersection with power, control and communication cables can be located above or below them.
4 In case of channelless laying, the clear distance from the water heating networks of an open heat supply system or hot water supply networks to the sewer pipes located below or above the heating networks is taken to be at least 0.4 m.
5 Soil temperature at the intersection of heating networks with electric cables at the depth of laying power and control cables with voltage up to 35 kV should not increase by more than 10 ° С in relation to the highest average monthly summer ground temperature and by 15 ° С - to the lowest average monthly winter ground temperature at a distance of up to 2 m from the extreme cables, and the ground temperature at the depth of the oil-filled cable should not increase by more than 5 ° С in relation to the average monthly temperature at any time of the year at a distance of up to 3 m from the extreme cables.
6 The deepening of heating networks at the places of the underground intersection of the railways of the general network in heaving soils is determined by calculation from the conditions under which the influence of heat release on the uniformity of frost heaving of the soil is excluded. If it is impossible to provide a given temperature regime by deepening heating networks, ventilation of tunnels (channels, cases), replacement of heaving soil at the intersection or overhead laying of heating networks is provided.
7 Distances to the telephone duct unit or to the armored communication cable in the pipes should be specified according to special standards.
8 In places of underground intersections of heating networks with communication cables, telephone duct blocks, power and control cables with voltage up to 35 kV, it is allowed, with appropriate justification, to reduce the vertical distance in the light when installing reinforced thermal insulation and observing the requirements of paragraphs 5, 6, 7 of these notes.

Table B.2 - Distances horizontally from underground water heating networks of open heat supply systems and hot water supply networks to sources of possible pollution

Table B.Z - Distances horizontally from the building structures of heating networks or the shell of pipeline insulation during channelless laying to buildings, structures and engineering networks

Minimum clear distances from pipelines to building structures and to adjacent pipelines

table 2

Minimum width of aisles

Table 3

The minimum clear distance between pipelines and building structures

APPENDIX 2

PROCEDURE FOR DETERMINING THE DESIGNED THERMAL EFFICIENCY OF WATER HEATERS OF HEATING AND HOT WATER SUPPLY

1. The calculated thermal performance of water heaters, W, should be taken according to the calculated heat fluxes for heating, ventilation and hot water supply, given in the design documentation of buildings and structures. In the absence of design documentation, it is allowed to determine the calculated heat fluxes in accordance with the instructions of SNiP 2.04.07-86 * (for enlarged indicators).

2. The design thermal performance of water heaters for heating systems should be determined at the design outside air temperature for heating design, ° С, and taken according to the maximum heat fluxes determined in accordance with the instructions in clause 1. With independent connection of heating and ventilation systems through a common water heater, the calculated thermal performance of the water heater, W, is determined by the sum of the maximum heat fluxes for heating and ventilation:

.

3. The estimated thermal performance of water heaters, W, for hot water supply systems, taking into account heat losses by supply and circulation pipelines, W, should be determined at water temperatures at the break point of the water temperature graph in accordance with the instructions in clause 1, and in the absence of design documentation - according to heat fluxes determined by the following formulas:

For consumers - according to the average heat flow for hot water supply for the heating period, determined in accordance with clause 3.13, and SNiP 2.04.01-85, according to the formula or depending on the adopted heat supply in the tanks according to Appendix 7 and 8 of the specified chapter (or according to SNiP 2.04.07-86 * -);

For consumers - according to the maximum heat flows for hot water supply, determined according to clause 3.13, b SNiP 2.04.01-85, (or according to SNiP 2.04.07-86 * - ).

4. In the absence of data on the amount of heat loss by pipelines of hot water supply systems, heat flows for hot water supply, W, are allowed to be determined by the formulas:

in the presence of storage tanks

in the absence of storage tanks

where is the coefficient taking into account the heat loss by pipelines of hot water supply systems, taken according to table. one.

Table 1

In the absence of data on the number and characteristics of water-folding devices, the hourly consumption of hot water for residential areas may be determined by the formula

where is the coefficient of the hourly unevenness of water consumption, taken from Table 2.

Note - For hot water supply systems serving both residential and public buildings, the hourly unevenness coefficient should be taken as the sum of the number of residents in residential buildings and the conditional number of residents in public buildings, determined by the formula

where is the average water consumption for hot water supply during the heating period, kg / h, for public buildings, determined according to SNiP 2.04.01-85.

In the absence of data on the purpose of public buildings, it is allowed when determining the coefficient of hourly unevenness according to table. 2 conventionally, the number of inhabitants is taken with a coefficient of 1.2.

table 2

Continuation of table. 2

APPENDIX 3

PROCEDURE FOR DETERMINING PARAMETERS FOR CALCULATING WATER HEATERS

1. Calculation of the heating surface of heating water heaters, sq. M, is carried out at the temperature of the water in the heating network corresponding to the design temperature of the outside air for the design of heating, and for the design capacity, determined according to Appendix 2, according to the formula

2. The temperature of the heated water should be taken:

at the inlet to the water heater - equal to the water temperature in the return pipe of heating systems at the outside air temperature;

at the outlet from the water heater - equal to the water temperature in the supply pipe of heating networks behind the central heating station or in the supply pipeline of the heating system when installing a water heater in the ITP at the outside temperature.

Note - With independent connection of heating and ventilation systems through a common water heater, the temperature of heated water in the return pipeline at the inlet to the water heater should be determined taking into account the water temperature after connecting the ventilation system pipeline. When the heat consumption for ventilation is not more than 15% of the total maximum hourly heat consumption for heating, the temperature of the heated water in front of the water heater is allowed to be equal to the temperature of the water in the return pipe of the otolation system.

3. The temperature of the heating water should be taken:

at the inlet to the water heater - equal to the water temperature in the supply pipe of the heating network at the inlet to the heat point at the outside air temperature;

at the outlet from the water heater - 5-10 ° C higher than the water temperature in the return pipe of the heating system at the design temperature of the outside air.

4. Estimated water consumption and, kg / h, for calculating water heaters for heating systems should be determined by the formulas:

heating water

heated water

With independent connection of heating and ventilation systems through a common water heater, the calculated water flow rate and, kg / h, should be determined by the formulas:

heating water

heated water

where, respectively, are the maximum heat fluxes for heating and ventilation, W.

5. The temperature head, ° С, of the heating water heater is determined by the formula

APPENDIX 4

PROCEDURE FOR DETERMINING PARAMETERS FOR CALCULATING HOT WATER HEATERS CONNECTED IN A SINGLE-STAGE CIRCUIT

1. The calculation of the heating surface of hot water supply heaters should be made (see Fig. 1) at the water temperature in the supply pipeline of the heating network corresponding to the break point of the water temperature graph, or at the minimum water temperature, if there is no break in the temperature graph, and according to the calculated performance, determined according to Appendix 2

where is determined in the presence of accumulator tanks according to the formula (1) of Appendix 2, and in the absence of accumulator tanks - according to the formula (2) of Appendix 2.

2. The temperature of the heated water should be taken: at the inlet to the water heater - equal to 5 ° C, if there are no operational data; at the outlet of the water heater - equal to 60 ° С, and with vacuum deaeration - 65 ° С.

3. The temperature of the heating water should be taken: at the inlet to the water heater - equal to the temperature of the water in the supply pipe of the heating network at the inlet to the heat point at the outside air temperature at the break point of the water temperature graph; at the outlet of the water heater - equal to 30 ° С.

4. Estimated water consumption and, kg / h, for calculating a hot water heater should be determined by the formulas:

heating water

heated water

5. The temperature head of the hot water heater is determined by the formula

6. The heat transfer coefficient, depending on the design of the water heater, should be determined according to Appendix 7-9.

APPENDIX 5

PROCEDURE FOR DETERMINING PARAMETERS FOR CALCULATING HOT WATER HEATERS CONNECTED IN A TWO-STAGE CIRCUIT

The method for calculating hot water heaters connected to the heating network according to a two-stage scheme (see Fig. 2-4) with a limitation of the maximum flow of network water at the input, used so far, is based on an indirect method, according to which the thermal performance of the first stage of water heaters is determined by the balance the load of hot water supply, and stage II - according to the difference in loads between the calculated and the load of the first stage. In this case, the principle of continuity is not observed: the temperature of the heated water at the outlet of the first stage water heater does not coincide with the temperature of the same water at the inlet to the second stage, which makes it difficult to use it for machine counting.

The new calculation method is more logical for a two-stage scheme with a limitation of the maximum flow of network water at the input. It is based on the position that at the hour of maximum draw-off at the outside air temperature calculated for the selection of water heaters corresponding to the break point of the central temperature graph, it is possible to interrupt the supply of heat for heating, and all the network water goes to the hot water supply. To select the required standard size and number of shell-and-tube sections or the number of plates and the number of strokes of plate water heaters, the heating surface should be determined by the design capacity and temperatures of heating and heated water from the thermal calculation in accordance with the formulas below.

1. The calculation of the heating surface, sq. M, hot water heaters should be carried out at the water temperature in the supply pipe of the heating network corresponding to the break point of the water temperature graph, or at the minimum water temperature, if there is no break in the temperature graph, since in this mode there will be a minimum temperature difference and values ​​of the heat transfer coefficient, according to the formula

where is the calculated thermal performance of hot water heaters, determined according to Appendix 2;

Heat transfer coefficient, W / (m2 · ° С), is determined depending on the design of water heaters according to Appendix 7-9;

The mean logarithmic temperature difference between heating and heated water (temperature head), ° С, is determined by formula (18) of this appendix.

2. The distribution of the calculated thermal performance of water heaters between stages I and II is carried out based on the condition that heated water in stage II is heated to a temperature of = 60 ° C, and in stage I - to a temperature determined by a technical and economic calculation or taken at 5 ° C less than the temperature of the supply water in the return pipeline at the break point of the graph.

The estimated thermal performance of water heaters of stages I and II, W, is determined by the formulas:

3. The temperature of the heated water, ° С, after the first stage is determined by the formulas:

with dependent connection of the heating system

with independent connection of the heating system

4. The maximum flow rate of heated water, kg / h, passing through the I and II stages of the water heater, should be calculated based on the maximum heat flow for hot water supply, determined by formula 2 of Appendix 2, and water heating to 60 ° C in the II stage:

5. Heating water consumption, kg / h:

a) for heat points in the absence of a ventilation load, the heating water flow rate is assumed to be the same for the I and II stages of water heaters and is determined:

when regulating the supply of heat according to the combined load of heating and hot water supply - according to the maximum consumption of network water for hot water supply (formula (7)) or according to the maximum consumption of network water for heating (formula (8)):

The largest of the obtained values ​​is taken as the calculated one;

when regulating the supply of heat according to the heating load, the calculated consumption of heating water is determined by the formula

; (9)

. (10)

In this case, the temperature of the heating water at the outlet of the stage I water heater should be checked with the formula

. (11)

If the temperature determined by formula (11) is below 15 ° С, then it should be taken equal to 15 ° С, and the heating water consumption should be recalculated using the formula

; (12)

b) for heating points in the presence of a ventilation load, the flow rate of heating water is taken:

for stage I

; (13)

for stage II

. (14)

6. Heating water temperature, ° С, at the outlet of the stage II water heater:

7. Heating water temperature, ° С, at the inlet to the stage I water heater:

. (16)

8. Heating water temperature, ° С, at the outlet of the stage I water heater:

. (17)

9. Average logarithmic temperature difference between heating and heated water, ° С:

. (18)

APPENDIX 6

PROCEDURE FOR DETERMINING PARAMETERS FOR CALCULATING HOT WATER HEATERS CONNECTED IN A TWO-STAGE CIRCUIT WITH STABILIZATION OF WATER FLOW FOR HEATING

1. The heating surface of water heaters (see Fig. 8) of hot water supply, m2, is determined at the water temperature in the supply pipe of the heating network corresponding to the break point of the water temperature graph, or at the minimum water temperature if there is no break in the temperature graph, since in this mode, there will be a minimum temperature difference and values ​​of the heat transfer coefficient, according to the formula

where is the calculated thermal performance of hot water heaters, W, is determined according to Appendix 2;

Average logarithmic temperature difference between heating and heated water, ° С, is determined according to Appendix 5;

Heat transfer coefficient, W / (m2 · ° С), is determined depending on the design of water heaters according to Appendix 7-9.

2. The heat flux to the II stage of the water heater, W, with a two-stage connection scheme for hot water heaters (according to Fig. 8), required only to calculate the heating water consumption, with a maximum heat flux for ventilation no more than 15% of the maximum heat flux for heating is determined by formulas:

in the absence of heated water storage tanks

in the presence of heated water storage tanks

, (3)

where - heat losses of pipelines of hot water supply systems, W.

In the absence of data on the magnitude of heat losses by pipelines of hot water supply systems, the heat flow to the II stage of the water heater, W, can be determined by the formulas:

in the absence of heated water storage tanks

in the presence of heated water storage tanks

where is the coefficient taking into account the heat loss by pipelines of hot water supply systems, is taken according to Appendix 2.

3. The distribution of the estimated thermal performance of water heaters between stages I and II, the determination of the design temperatures and water flow rates for calculating water heaters should be taken according to the table.

Name of calculated values	Scope of the scheme (according to Fig. 8)
industrial buildings, a group of residential and public buildings with a maximum heat flow for ventilation more than 15% of the maximum heat flow for heating	residential and public buildings with a maximum heat flow for ventilation no more than 15% of the maximum heat flow for heating
I stage of a two-stage scheme
Estimated thermal performance of the first stage of the water heater
	, with vacuum deaeration + 5
The same, at the outlet of the water heater
	Without storage tanks
	With storage tanks
Heating water consumption, kg / h
II stage of a two-stage scheme
Estimated thermal performance of the II stage of the water heater
Heated water temperature, ° С, at the water heater inlet	With storage tanks Without storage tanks
The same, at the outlet of the water heater	= 60 ° C
Heating water temperature, ° С, at the water heater inlet
The same, at the outlet of the water heater
Heated water consumption, kg / h	Without storage tanks
Heating water consumption, kg / h	With storage tanks in the absence of circulation In the presence of circulation,	With storage tanks,
Notes: 1 In case of independent connection of heating systems, instead of should be taken; 2 The value of subcooling in stage I, ° С, is taken: with storage tanks = 5 ° С, in the absence of storage tanks = 10 ° С; 3 When determining the design flow rate of heating water for stage I of the water heater, water flow rate from ventilation systems is not taken into account; 4 The temperature of heated water at the outlet of the heater in the central heating station and in the central heating station should be taken equal to 60 ° С, and in the central heating station with vacuum deaeration - = 65 ° С; 5 The value of the heat flux for heating at the break point of the temperature graph is determined by the formula.

APPENDIX 7

THERMAL AND HYDRAULIC CALCULATION OF HORIZONTAL SECTIONAL SHELL-PIPE WATER-WATER HEATERS

Horizontal sectional high-speed water heaters in accordance with GOST 27590 with a pipe system of straight smooth or profiled pipes are distinguished by the fact that to eliminate the deflection of the pipes, two-section support partitions are installed, which are part of the tube sheet. This design of the support baffles facilitates the installation of tubes and their replacement in the field, since the holes of the support baffles are aligned with the holes of the tube sheets.

Each support is installed with an offset relative to each other by 60 ° C, which increases the turbulization of the coolant flow passing through the annular space, and leads to an increase in the heat transfer coefficient from the coolant to the tube wall, and, accordingly, the heat removal from 1 square meter of the heating surface increases. Brass tubes are used with an outer diameter of 16 mm, a wall thickness of 1 mm in accordance with GOST 21646 and GOST 494.

An even greater increase in the heat transfer coefficient is achieved by using profiled brass tubes instead of smooth brass tubes in the tube bundle, which are made from the same tubes by extruding transverse or helical grooves on them with a roller, which leads to turbulence of the near-wall fluid flow inside the tubes.

Water heaters consist of sections, which are interconnected by rolls along the pipe space and nozzles - along the annular space (Fig. 1-4 of this appendix). The branch pipes can be split on flanges or one-piece welded. Depending on the design, water heaters for hot water supply systems have the following symbols: for a detachable design with smooth tubes - РГ, with profiled ones - РП; for a welded structure - SG, SP, respectively (the direction of flows of heat exchanging media is given in clause 4.3 of this set of rules).

Fig. 1. General view of a horizontal sectional shell-and-tube water heater with turbulators

Fig. 2. Constructive dimensions of the water heater

1 - section; 2 - kalach; 3 - transition; 4 - block of supporting partitions; 5 - tubes; 6 - supporting partition; 7 - ring; 8 - bar;

Fig. 3. Kalach connecting

Fig. 4. Transition

An example of a conventional designation of a split-type water heater with an outer diameter of a section body of 219 mm, a section length of 4 m, without a thermal expansion compensator, for a nominal pressure of 1.0 MPa, with a pipe system of smooth tubes of five sections, climatic version UZ: PV 219 x 4 -1, O-RG-5-UZ GOST 27590.

The technical characteristics of the water heaters are given in Table 1, and the nominal dimensions and connection dimensions are given in Table 2 of this Appendix.

Table 1

Technical characteristics of water heaters GOST 27590

Norms, standards and rules for horizontal distances (in the light) from the nearest underground engineering networks to buildings and structures, between adjacent engineering underground networks when they are placed in parallel, at the intersection of engineering communications, the vertical distance (in the light). Distance between pipes and cables. Distances between pipelines, cables, refuse chutes, pipes and other utilities and other objects - tables. Distance from pipe to ... Distance from cable to .... table.

Horizontal distances (in the light) from the nearest underground engineering networks to buildings and structures should be taken according to the corresponding table "SP 42.13330 Urban planning. Planning and development of urban and rural settlements"

Horizontal distances (in the light) from the nearest underground engineering networks to buildings and structures should be taken according to the table below. The minimum distances from underground (above ground with embankment) gas pipelines to buildings and structures should be taken in accordance with SP 62.13330 "Gas distribution systems. Updated edition of SNiP 42-01-2002 (this review is not considered the issue)."

Table (SP 42.13330) Distance, m, horizontally (in the light) from underground networks to buildings and structures

* Refers only to distances from power cables.

• Notes (edit)
  1. For climatic subareas IA, IB, IG and ID, the distance from underground networks (water supply, domestic and rainwater drainage, drainage, heating networks) during construction with the preservation of the permafrost state of the foundation soils should be taken according to technical calculation.
  2. It is allowed to provide for the laying of underground engineering networks within the foundations of supports and overpasses of pipelines, a contact network, provided that measures are taken to exclude the possibility of damage to networks in the event of settling of foundations, as well as damage to foundations in an accident on these networks. When placing engineering networks to be laid with the use of construction dewatering, their distance to buildings and structures should be set taking into account the zone of possible violation of the strength of the foundation soils.
  3. Distances from heating networks with channelless laying to buildings and structures should be taken as for a water supply system.
  4. Distances from power cables with a voltage of 110-220 kV to the foundations of fences of enterprises, overpasses, overhead supports and communication lines should be taken as 1.5 m.
  5. The horizontal distances from the lining of underground underground structures made of cast-iron tubing, as well as reinforced concrete or concrete with glued waterproofing, located at a depth of less than 20 m (from the top of the lining to the surface of the earth), should be taken
  • to sewerage networks, water supply systems, heating networks - 5 m;
  • from lining without pasting waterproofing to sewerage networks - 6 m,
  • for other water-bearing networks - 8 m;
  • the distance from the lining to the cables is taken: with voltage up to 10 kV - 1 m, up to 35 kV - 3 m.
• In irrigated areas with non-subsiding soils, the distance from underground engineering networks to irrigation canals should be taken (to the edge of canals), m:
  • 1 - from a gas pipeline of low and medium pressure, as well as from water pipelines, sewerage, drains and pipelines of flammable liquids;
  • 2 - from high-pressure gas pipelines up to 0.6 MPa, heat pipelines, utility and rainwater drainage systems;
  • 1.5 - from power cables and communication cables;
  • distance from the irrigation canals of the street network to the foundations of buildings and structures - 5.

The horizontal distances (in the light) between adjacent engineering underground networks when they are placed in parallel should be taken according to the table below "SP 42.13330 Urban planning. Planning and development of urban and rural settlements"

12.36 Distances horizontally (in the light) between adjacent engineering underground networks when they are placed in parallel should be taken according to Table 16, and at the inputs of engineering networks in buildings of rural settlements - at least 0.5 m.When the difference in the depth of the adjacent pipelines is over 0, The 4 m distances indicated in Table 16 should be increased taking into account the steepness of the slopes of the trenches, but not less than the depth of the trench to the bottom of the embankment and the edge of the excavation. The minimum distances from underground (above ground with embankment) gas pipelines to utility networks should be taken in accordance with SP 62.13330. and at the inputs of engineering networks in buildings of rural settlements - at least 0.5 m.When the difference in the depth of the adjacent pipelines is more than 0.4 m, the distances indicated in Table 16 should be increased taking into account the steepness of the slopes of the trenches, but not less than the depth of the trench to the soles of the embankment and the edge of the notch. The minimum distances from underground (above ground with embankment) gas pipelines to utility networks should be taken in accordance with SP 62.13330. "Gas distribution systems. Updated edition of SNiP 42-01-2002" (in this review the issue is not considered).

Table (SP 42.13330) Distance, m, horizontally (in the light) to neighboring engineering networks when they are placed in parallel

• Notes (edit)
  1. When several water supply lines are laid in parallel, the distance between them should be taken depending on the technical and engineering-geological conditions in accordance with SP 31.13330.
  2. Distances from the domestic sewage system to the drinking water supply system should be taken, m:
     • to the water supply from reinforced concrete and asbestos-cement pipes - 5;
     • to the water supply system from cast iron pipes with a diameter of up to 200 mm - 1.5,
     • with a diameter over 200 mm - 3;
     • to the water supply from plastic pipes - 1.5.
  3. The distance between the sewerage and industrial water supply networks, depending on the material and diameter of the pipes, as well as on the nomenclature and characteristics of the soils, should be 1.5 m.

When engineering networks intersect each other, the vertical (clear) distances should be taken in accordance with the requirements of SP 18.13330. "CODE OF RULES GENERAL PLANS OF INDUSTRIAL ENTERPRISES Master plans for industrial enterprises" Updated edition of SNiP II-89-80

• When crossing engineering communications, the vertical distance (in the light) must be at least:
  • a) between pipelines or electric cables, communication cables and railway and tramways, counting from the foot of the rail, or roads, counting from the top of the coating to the top of the pipe (or its case) or electric cable, according to the calculation for the strength of the network, but not less than 0 , 6 m;
  • b) between pipelines and electric cables placed in canals or tunnels and railways, the vertical distance, counting from the top of the overlap of canals or tunnels to the foot of the railroad rails, is 1 m, to the bottom of a ditch or other drainage structures or the base of an embankment of a railway earthen canvases - 0.5 m;
  • c) between pipelines and power cables up to 35 kV and communication cables - 0.5 m;
  • d) between power cables with a voltage of 110-220 kV and pipelines - 1 m;
  • e) in conditions of reconstruction of enterprises, subject to compliance with the requirements of the PUE, the distance between cables of all voltages and pipelines is allowed to be reduced to 0.25 m;
  • f) between pipelines for various purposes (with the exception of sewer pipelines that cross water pipelines and pipelines for poisonous and foul-smelling liquids) - 0.2 m;
  • g) pipelines transporting potable water should be placed above sewer or pipelines transporting poisonous and foul-smelling liquids, by 0.4 m;
  • h) it is allowed to place steel pipelines enclosed in cases transporting drinking water below the sewer, while the distance from the walls of the sewer pipes to the edge of the case must be at least 5 m in each direction in clay soils and 10 m in coarse and sandy soils , and sewer pipelines should be made of cast iron pipes;
  • i) the inlets of the domestic drinking water supply with a pipe diameter of up to 150 mm may be provided below the sewer without a case, if the distance between the walls of intersecting pipes is 0.5 m;
  • j) for channelless laying of pipelines for water heating networks of an open heat supply system or hot water supply networks, the distance from these pipelines to the sewer pipelines located below and above should be taken as 0.4 m.

3.75. The distances between trees and shrubs during an ordinary planting should be taken at least as indicated in table. eight.

Table 8

3.76. The distance between the border of tree plantations and cooling ponds and spray pools, counting from the coastal edge, should be at least 40 m.

3.77. The main element of landscaping the sites of industrial enterprises should be a lawn.

3.78. On the territory of the enterprise, there should be provided well-equipped areas for rest and gymnastic exercises for workers.

The sites should be located on the windward side in relation to buildings with industries that emit harmful emissions into the atmosphere.

The size of the sites should be taken at the rate of no more than 1 square meter per employee in the most numerous shift.

3.79. For enterprises with industries that emit aerosols, decorative ponds, fountains, rainwater installations should not be provided that contribute to an increase in the concentration of harmful substances at the sites of enterprises.

3.80. Along the main and industrial roads, sidewalks should be provided in all cases, regardless of the intensity of pedestrian traffic, and along the driveways and entrances - with a traffic intensity of at least 100 people. per shift.

3.81. Sidewalks on the site of an enterprise or the territory of an industrial hub should be located no closer than 3.75 m from the nearest normal gauge railway track. Reducing this distance (but not less than the dimensions of the approach of buildings) is allowed when arranging handrails that enclose the sidewalk.

The distance from the axis of the railway track along which the transportation of hot goods is carried out to the sidewalks must be at least 5 m.

Sidewalks along buildings should be placed:

a) with an organized drainage of water from the roofs of buildings - close to the building line with an increase in the width of the sidewalk by 0.5 m in this case (against that provided for by the norms of clause 3. 82);

b) in case of unorganized drainage of water from the roofs - at least 1.5 m from the building line.

3.82 *. The width of the sidewalk should be taken as a multiple of 0.75 m in width. The number of traffic lanes on the sidewalk should be set depending on the number of workers employed in the most numerous shift in the building (or in a group of buildings) to which the sidewalk leads, at the rate of 750 people. per shift per lane. The minimum sidewalk width must be at least 1.5 m.

If the intensity of pedestrian traffic is less than 100 person-hours in both directions, sidewalks with a width of 1 m are allowed, and when disabled people using wheelchairs move along them, a width of 1.2 m is allowed.

The slopes of the sidewalks intended for the possible passage of disabled people using wheelchairs should not exceed: longitudinal - 5%, transverse - 1% At the intersection of such sidewalks with the carriageway of the enterprise's roads, the height of the side stone should not exceed 4 cm.

3.83. When placing sidewalks next to or on a common subgrade with a motor road, they must be separated from the road by a dividing strip with a width of at least 0.8 m. The location of sidewalks close to the carriageway of the motor road is allowed only in conditions of enterprise reconstruction. When the sidewalk is adjacent to the carriageway, the sidewalk must be at the level of the top of the curbstone, but not less than 15 cm above the carriageway.

Note. For the Northern building and climatic zone, sidewalks and

bike paths along highways should be designed for

common ground bed with it, separating them from the carriageway with a lawn of at least

1 m, without installing a side stone, but with a through fence

between the lawn and the sidewalk.

3.84. When reconstructing enterprises located in crowded areas, it is allowed, with appropriate justification, to increase the width of highways due to landscaping strips separating them from sidewalks, and in their absence, due to sidewalks with the transfer of the latter.

3.85 *. At the sites of enterprises and territories of industrial centers, the intersection of pedestrian traffic with railway tracks in places of mass passage of workers, as a rule, is not allowed. When justifying the need for the arrangement of these intersections, the crossings at one level should be equipped with traffic lights and sound alarms, and also ensure visibility not less than that provided for in the SNiP chapter on the design of highways.

Crossings at different levels (mainly in tunnels) should be provided in the following cases: crossing station tracks, including exhaust tracks; transportation along the routes of liquid metals and slag; production of shunting work on the crossed paths and the impossibility of stopping it during the mass passage of people; sludge on the tracks of wagons, heavy traffic (more than 50 feeds per day in both directions).

When disabled people using wheelchairs move around the territory of the enterprise, pedestrian tunnels must be equipped with ramps.

The intersections of highways with pedestrian paths should be designed in accordance with the chapter of SNiP on the planning and development of cities, towns and rural settlements.

3.86. Fencing of sites of enterprises should be provided in accordance with the "Guidelines for the design of fences for sites and sites of enterprises, buildings and structures."

4. PLACEMENT OF ENGINEERING NETWORKS

4.1. For enterprises and industrial centers, a unified system of engineering networks should be designed, located in technical zones, ensuring the occupation of the smallest sections of the territory and linking with buildings and structures.

4.2 *. At the sites of industrial enterprises, predominantly ground and above-ground methods of placing engineering networks should be provided.

In the pre-plant zones of enterprises and public centers of industrial centers, underground placement of engineering networks should be provided.

4.3. For networks of various purposes, it should, as a rule, provide for joint placement in common trenches, tunnels, canals, on low supports, sleepers or on ramps in compliance with the relevant sanitary and fire safety standards and safety rules for the operation of networks.

Joint underground placement of pipelines for circulating water supply, heating networks and gas pipelines with technological pipelines is allowed, regardless of the parameters of the coolant and the parameters of the environment in the technological pipelines.

4.4. When designing engineering networks at the sites of enterprises located in special natural and climatic conditions, the requirements provided for by the chapters of SNiP for the design of water supply, sewerage, gas supply and heating networks should also be fulfilled.

4.5. The placement of external networks with flammable and combustible liquids and gases under buildings and structures is not allowed.

4.6. The choice of the method for placing power cable lines should be provided in accordance with the requirements of the "Rules for the Installation of Electrical Installations" (PUE), approved by the USSR Ministry of Energy.

4.7. When placing heating networks, the intersection of production and auxiliary buildings of industrial enterprises is allowed.

UNDERGROUND NETWORKS

4.8. Underground networks, as a rule, should be laid outside the carriageway of highways.

On the territory of the reconstructed enterprises, it is allowed to place underground networks under highways.

Notes: 1. Ventilation shafts, entrances and other devices of ducts and

tunnels should be located outside the carriageway and in places free from

development.

2. With channelless laying, it is allowed to place networks within

4.9. In the Northern construction and climatic zone, engineering networks, as a rule, should be laid together in tunnels and canals, preventing a change in the temperature regime of the soils of the foundations of the nearest buildings and structures.

Note. Plumbing, sewerage and drainage networks should be placed

in the zone of temperature influence of heating networks.

4.10. In canals and tunnels, it is allowed to place gas pipelines of combustible gases (natural, associated oil, artificial mixed and liquefied hydrocarbon gases) with a gas pressure of up to 0.6 MPa (6 kgf / sq.cm) together with other pipelines and communication cables, provided that ventilation and lighting are installed in canals and tunnels in accordance with sanitary standards.

Joint placement in the channel and tunnel is not allowed: gas pipelines of combustible gases with power and lighting cables, with the exception of cables for lighting the channel or tunnel itself; pipelines of heating networks with liquefied gas pipelines, oxygen pipelines, nitrogen pipelines, cold pipelines, pipelines with flammable, volatile, chemically caustic and toxic substances and with domestic sewage drains; pipelines of flammable and combustible liquids with power cables and communication cables, with networks of fire-fighting water supply and gravity sewerage; oxygen pipelines with gas pipelines of combustible gases, flammable and combustible liquids with pipelines of poisonous liquids and with power cables.

Notes: 1. Co-placement in common channels and

tunnels of pipelines of flammable and combustible liquids with pressure

sets of water supply (except for fire) and pressure sewerage.

2. Channels and tunnels designed to accommodate pipelines with fire,

explosive and toxic materials (liquids), must have exits to

less often than 60 m and at its ends.

4.11 *. Underground engineering networks should be placed in parallel in a common trench; at the same time, the distances between engineering networks, as well as from these networks to the foundations of buildings and structures, should be taken as the minimum permissible based on the size and location of chambers, wells and other devices on these networks, the conditions for installation and repair of networks.

Horizontal distances (in the light) from the nearest underground engineering networks, with the exception of gas pipelines of combustible gases, to buildings and structures should be taken no more than those indicated in Table. 9. The distances from gas pipelines of combustible gases to buildings and structures indicated in this table are minimal.

Distances horizontally (in the light) between adjacent underground engineering networks when they are placed in parallel should be taken no more than those indicated in Table. 10.

4.12. When laying a cable line parallel to a high-voltage line (OHL) with a voltage of 110 kV and above, the horizontal distance (in the light) from the cable to the end wire must be at least 10 m.

In the context of the reconstruction of enterprises, the distance from cable lines to underground parts and ground electrodes of individual supports of overhead lines with a voltage above 1000 V is allowed to be at least 2 m, while the horizontal distance (in the light) to the extreme wire of the overhead line is not standardized.

4.13 *. When crossing engineering networks, the vertical (clear) distances must be at least:

a) between pipelines or electric cables, communication cables and railway and tramways, counting from the foot of the rail, or roads, counting from the top of the coating to the top of the pipe (or its case) or electric cable, according to the calculation for the strength of the network, but not less than 0 , 6 m;

b) between pipelines and electric cables placed in canals or tunnels and railways, the vertical distance, counting from the top of the overlap of canals or tunnels to the foot of the railroad rails, is 1 m, to the bottom of a ditch or other drainage structures or the base of an embankment of a railway earthen canvases - 0.5 m;

c) between pipelines and power cables up to 35 kV and communication cables - 0.5 m;

d) between 110 - 220 kV power cables and pipelines - 1 m;

e) in conditions of reconstruction of enterprises, subject to compliance with the requirements of the PUE, the distance between cables of all voltages and pipelines is allowed to be reduced to 0.25 m;

f) between pipelines for various purposes (with the exception of sewer pipelines that cross water pipelines and pipelines for poisonous and foul-smelling liquids) - 0.2 m;

g) pipelines transporting potable water should be placed above sewer or pipelines transporting poisonous and foul-smelling liquids, by 0.4 m;

h) it is allowed to place steel pipelines enclosed in cases transporting drinking water below the sewer, while the distance from the walls of the sewer pipes to the edge of the case must be at least 5 m in each direction in clay soils and 10 m in coarse and sandy soils , and sewer pipelines should be made of cast iron pipes;

i) the inlets of the domestic drinking water supply with a pipe diameter of up to 150 mm may be provided below the sewer without a case, if the distance between the walls of intersecting pipes is 0.5 m;

j) for channelless laying of pipelines for water heating networks of an open heat supply system or hot water supply networks, the distance from these pipelines to the sewer pipelines located below and above should be taken as 0.4 m.

4.14. When placing engineering networks vertically on the sites of industrial enterprises and territories of industrial hubs, the norms of the chapters of SNiP on the design of water supply, sewerage, gas supply, heating networks, structures of industrial enterprises, PUE should be observed.

4.15. When crossing channels or tunnels for various purposes, gas pipelines should be placed above or below these structures in cases extending 2 m on both sides of the outer walls of channels or tunnels. It is allowed to lay underground gas pipelines in a case with a pressure of up to 0.6 MPa (6 kgf / sq.cm) through tunnels for various purposes.

Table 9

Table 10

4.16. The intersections of pipelines with railway and tram tracks, as well as with highways should be provided, as a rule, at an angle of 90 degrees. In some cases, with appropriate justification, it is allowed to reduce the angle of intersection to 45 °.

The distance from gas pipelines and heating networks to the beginning of the wits, the tail of the crosses and the points of connection to the rails, suction cables should be taken at least 3 m for tram tracks and 10 m for railways.

4.17. The intersection of cable lines laid directly in the ground with the tracks of electrified rail transport should be provided at an angle of 75 - 90 ° to the axis of the track. The intersection should be at a distance of at least 10 m for railways and at least 3 m for tramways from the beginning of the wits, the tail of the crosses and the points of connection to the rails of the suction cables.

In case of transition of a cable line into an overhead cable, it must come out to the surface at a distance of at least 3.5 m from the foot of the embankment or from the edge of the railway or road bed.

GROUND NETWORKS

4.18. When placing networks on the ground, it is necessary to provide for their protection from mechanical damage and adverse atmospheric effects.

Ground nets should be placed on sleepers laid in open trays, at elevations below the planning marks of the sites (territory). Other types of ground placement of networks are allowed (in canals and tunnels laid on the surface of the territory or on a continuous bed, in canals and semi-buried tunnels, in open trenches, etc.)

4.19. Pipelines for flammable gases, toxic products, pipelines through which acids and alkalis are transported, as well as domestic sewage pipelines are not allowed to be placed in open trenches and trays.

4.20. Ground networks are not allowed to be placed within the strip allocated for laying underground networks in trenches and canals that require periodic access to them during operation.

OVERGROUND NETWORKS

4.21. Overhead engineering networks should be placed on supports, overpasses, in galleries or on the walls of buildings and structures.

4.22. The intersection of cable racks and galleries with overhead power lines, in-plant railways and highways, cable cars, overhead communication and radio communication lines and pipelines should be performed at an angle of at least 30 °.

4.23 *. The placement of overhead networks is not allowed:

a) transit on-site pipelines with flammable and combustible liquids and gases along ramps, stand-alone columns and supports made of combustible materials, as well as along the walls and roofs of buildings, with the exception of buildings of I, II, IIIa degrees of fire resistance with production facilities of categories C, D and D;

b) pipelines with flammable liquid and gaseous products in galleries, if the mixing of products can cause an explosion or fire;

c) pipelines with flammable and combustible liquids and gases, along combustible coatings and walls;

on coatings and walls of buildings in which explosive materials are placed;

d) gas pipelines of combustible gases;

on the territory of warehouses of flammable and combustible liquids and materials.

Note. The onsite pipeline is in transit with respect to

those buildings, technological installations of which do not produce and do not consume

liquids and gases transported through these pipelines.

4.24. Aboveground pipelines for flammable and combustible liquids, laid on separate supports, ramps, etc., should be placed at a distance of at least 3 m from the walls of buildings with openings, from walls without openings, this distance can be reduced to 0.5 m.

4.25. On low supports, pressure pipelines with liquids and gases should be placed, as well as power and communication cables located:

a) in the technical strips of the sites of enterprises specially designated for these purposes;

b) on the territory of warehouses for liquid products and liquefied gases.

4.26. The height from the ground level to the bottom of pipes (or the surface of their insulation), laid on low supports in a free area outside the passage of vehicles and the passage of people, should be taken at least:

with a pipe group width of at least 1.5 m - 0.35 m;

with a group of pipes width of 1.5 m and more - 0.5 m.

The placement of pipelines with a diameter of 300 mm and less on low supports should be provided in two rows or more vertically, minimizing the width of the network route as much as possible.

4.27 *. The height from ground level to the bottom of pipes or the surface of insulation laid on high supports should be taken:

a) in the impassable part of the site (territory), in places where people pass - 2.2 m;

b) at intersections with highways (from the top of the roadway surface) - 5 m;

c) at intersections with internal railway sidings and tracks of the general network - in accordance with GOST 9238-83;

d) excluded;

e) at intersections with tram tracks - 7.1 m from the rail head;

f) at the points of intersection with the trolleybus contact network (from the top of the carriageway surface) - 7.3 m;

g) at the intersection of pipelines with flammable and combustible liquids and gases with internal railway sidings for transportation of molten iron or hot slag (up to the rail head) - 10 m; when installing thermal protection of pipelines - 6 m.

Distance "in the light"- 2.40. Clearance distance is the smallest distance between two outer surfaces. Source …

Distance between the inner faces of the structure supports (Bulgarian; Български) svetl otvor (Czech; Čeština) světlost (German; Deutsch) lichte Spannweite; Lichtweite (Hungarian; Magyar) szabad nyílás (Mongolian) ... ... Construction vocabulary

Clear staircase width- 3.7. The clear width of the ladder is the minimum distance between the inner surfaces of the ladder bowstrings. Source: NPB 171 98 *: Manual fire ladders. General technical requirements. Test methods 3.8 clear staircase width: Minimum ... ... Dictionary-reference book of terms of normative and technical documentation

Clear width of floating dock- 21. Clear width of a floating dock Clear width Sun The smallest distance measured perpendicular to the diametrical plane of a floating dock between the protruding structures of its inner sides Source: GOST 14181 78: Floating docks. Terms, ... ... Dictionary-reference book of terms of normative and technical documentation

span- The distance between the inner faces of the structure supports [Terminological dictionary for construction in 12 languages ​​(VNIIIS Gosstroy USSR)] Other topics for construction products EN clear span DE lichte SpannweiteLichtweite FR portee libre ... Technical translator's guide

clear height- 3.1.4 headroom e smallest vertical distance above the center line, free from all obstructions (such as rungs, risers, etc.) (see Figure 1) Source: GOST R ISO 14122 3 2009: Safety of machinery. Funds… … Dictionary-reference book of terms of normative and technical documentation

The clear distance between the supports, measured at the calculated high water level minus the width of the intermediate supports (Bulgarian; Български) opening to the bridge (Czech; Čeština) světlé rozpětí mostu (German; Deutsch) ... ... Construction vocabulary