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EVS 921:2022

Water supply systems outside buildings

General information

Valid from 01.04.2022
ICS Groups
13.060.30 Sewage water 91.010.30 Technical aspects 91.140.60 Water supply systems
Directives or regulations
None
Changes from previous version
EVS 921:2022 on eelmise versiooni edasiarendus. Standardis on täiendatud olemasolevaid peatükke, et anda täpsemat teavet projekteerijatele ning ehitustööde tegijatele. Arvestades erialainseneride praktilisi kogemusi, on täpsustatud termineid, muudetud võrguelementide seletusi, lisatud seadmekaevude näidislahendusi, selgitatud kompensaatorite valiku põhimõtteid jms.

Standard history

Status
Date
Type
Name
01.04.2022
Main
EVS 921:2022
04.02.2014
Main
EVS 921:2014
This Estonian standard is applicable to external water supply networks, regardless of the form of ownership, including the water network from the water treatment plant or borehole pump to the external wall of the buildings. The standard is the basis for the design of the water network, the dimensioning of water pipelines and the selection of pumps and other auxiliary equipment, and can be used both for the construction of a new water network and for the extension and conversion of an existing water network.
The standard specifies the functional requirements for the planning, design, construction, operation, maintenance and operation of the external water supply network, and the activities to meet the requirements.
Water treatment includes water intake, water treatment, water storage and transmission (external water supply network / distribution) to the consumer (see Figure 1).
When selecting a water intake water source, follow the relevant legislation and the standard EVS 847-1, when processing water, follow the standard EVS 847-2, when distributing water to the consumer, follow the relevant legislation and standards EVS 921 and EVS 835.

Required fields are indicated with *

*
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Estonian (PDF 254 KB)

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Standard package 10:2022-04-01

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EVS 835:2014

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Standards designation

EVS Estonian standard
EN European standard (published by an CEN or CENELEC)
EN ISO International standard adopted as an European standard
ISO International Organization for Standardization’s standard
IEC International Electrotechnical Commission’s standard
HD CENELEC’s harmonisation document
   
EVS-EN European standard implemented in Estonia
EVS-EN ISO International standard adopted in Europe and implemented in Estonia
EVS-EN ISO/IEC International standard/International electrotechnical standard adopted in Europe and implemented in Estonia
EVS-IEC International electrotechnical standard implemented in Estonia
EVS-ISO International standard implemented in Estonia
   
A, AMD amedment
+A a full standard plus the amendment
/A only amendment
COR, AC corrigendum
+COR a full standard plus the corrigendum
NA national annex
+NA a full standard plus the national annex
/NA only national annex
TS technical specification
TR technical report
CWA agreement, developed by a CEN or CENELEC
prEVS-EN (etc) draft standard
   
et the standard is in Estonian only
en the standard is in English only
et-en the standard is in Parallel text Estonian-English