SNiP 2.04.01-85

СНиП на английском языке SNiP 2.04.01-85

5.2. Pipelines of the hot water supply system shall not be connected to pipelines supplying hot water of
non-drinking quality for industrial needs; any direct contact with production equipment and plants of hot water
supplied to the consumer with possible change in its quality is not permitted, either.
5.3. Water heating and treatment configurations for centralized hot water supply systems shall be chosen in
accordance with SNiP II-G.10-73* (II-36-73*) and the “Guidelines for the Design of Heat Points” developed by the
USSR State Committee for Construction, Ministry of Power Engineering and the Main Architectural and Design
Board of the Moscow City Executive Committee.
5.4. In centralized hot water supply systems, the water heating points shall be located, as a rule, in the
centre of hot water consumption area.
5.5. There may be no circulation of hot water in centralized hot water supply systems with time-regulated
hot water consumption, unless its temperature in water distribution areas goes below the one established in section 2
of these standards.
5.6. In buildings and rooms of medical and disease-prevention institutions, pre-school and residential
buildings – in bathrooms and shower rooms, towel dryers shall be installed and they shall be, as a rule, connected to
hot water supply systems in configuration that would ensure their constant heating with hot water.
Notes: 1. With the hot water feed by centralized hot water supply systems connected to heat supply systems with direct
water distribution, towel dryers may be connected to independent year-round operation heating systems of bathrooms and shower
rooms.

  1. With the appropriate justification, towel dryers may be disconnected from the hot water supply or heating system in
    summertime.
    5.7. In residential and public buildings higher than 4 storeys, groups of water distribution risers shall be
    combined with ring junction branches into sectional units, each sectional unit being connected by one circulation
    pipeline to the collection circulation pipeline of the system. Three to seven water distribution risers shall be
    combined into sectional units. Ring junction branches shall be laid in a warm attic, a cold attic under a heat
    insulating layer, under the ceiling of the upper storey in case of water supply to water distribution risers below, or in
    the basement in case of water supply to water distribution risers above.
    Note. Takeoff risers may be left without cross-connection, if the length of the ring junction branch exceeds the total
    length of the circulation risers.
    5.8. In buildings up to 4 storeys in height and in buildings where ring junction branches cannot be laid,
    towel dryers may be installed:
    on circulation risers of the hot water supply system;
    on a round-the-year operation heating system of bathrooms; in such a case water distribution risers and
    distribution pipelines shall be laid jointly with heating pipelines in common insulation.
    5.9. Connection of water distribution fixtures to circulation risers and circulation pipelines is not permitted.
    5.10. For rural settlements and villages the choice of the hot water supply system type shall be determined
    by the feasibility study.
    5.11. Storage tanks shall be installed in the centralized hot water supply system in compliance with section
    13.
    5.12. Pressure at sanitary fixtures in the hot water supply system shall not exceed 0.6 MPa (6 kgf/cm2).
  2. FIREWATER SUPPLY SYSTEMS
    6.1. For residential and public buildings, as well as auxiliary buildings of industrial enterprises, the
    necessity of arranging the indoor firewater supply system, as well as the minimum water flow rates for fire
    extinguishing shall be determined in accordance with table 1, and those for production and storage buildings in
    accordance with table 2.
    Water flow for fire extinguishing, depending on the height of the compact section of the jet and spraying
    diameter shall be finally determined in accordance with table 3.
    The necessity of arranging automatic fire extinguishing systems shall be understood in compliance with the
    requirements of the respective construction code and guidelines (SNiP) and lists of buildings and rooms subject to
    equipment with automatic fire extinguishing aids, approved by the appropriate ministries. Simultaneous operation of
    fire cocks and sprinkling or drenching installations shall be taken into account.