BS EN BRITISH STANDARD | | | | | Incorporating | | Amendment No. . prEN , Specifications for installations inside buildings conveying. BS EN was published in February at which point was BS EN – Specification for installations inside buildings conveying. View Account▹ · Home; BS EN Secure PDF. ℹ Printed Edition + PDF; Immediate download; $; Add to Cart.
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BS EN and BS Throughout the United Kingdom, wholesome water ( i.e. water fit for human con- sumption) is provided by the local. BS - BS Band saws for hard and brittle materials. Most versatile machine for hard and brittle materials. Flexible application for small production volumes. BS EN - Download as PDF File .pdf), Text File .txt) or read online. Specifications for installations inside buildings conveying water for human.
Plumbing fittings. Licensed copy: Part 4: Fittings combining other end connections with capillary or compression ends EN For dated references. Water supply — Requirements for external systems and components outside buildings.
Chemicals used for treatment of water intended for human consumption — Sodium chloride for regeneration of ion exchangers. Specifications for installations inside buildings conveying water for human consumption — Part 1: Ductile iron. Gas-fired instantaneous water heaters for sanitary uses production. Copper and copper alloys — Seamless. Uncontrolled Copy. Copper and copper alloys — Plumbing fittings — Part 2: Fittings with compression ends for use with copper tubes.
Building valves — Pressure safety valves — Tests and requirements. Building valves — Hydraulic safety groups —Tests and requirements.
Plastics piping systems for water supply — Polyethylene PE — Part 1: General EN Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage systems — Part 1: Plastics piping systems for water supply — Polyethylene PE — Part 2: Pipes EN Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage systems — Part 2: Influencing factors for copper and copper alloys.
Non-Alloy steel tubes suitable for welding and threading — Technical delivery conditions. Building valves. Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage systems — Part 3: Influencing factors for hot dip galvanised ferrous materials.
Building valves — Expansion valve — Tests and requirements. Pipe threads where pressure tight joints are made on the threads. Tests and requirements. Combined temperature and pressure relief valves. Plastics piping systems for water supply — Polyethylene PE — Part 7: Guidance for the assessment of conformity. Plastics piping systems for water supply — Polyethylene PE — Part 5: Fitness for purpose of the system.
ENV Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage conveying systems — Part 4: Influencing factors for stainless steels. Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow. Building valves — Expansion group — Tests and requirements. Plastics piping systems for water supply — Polyethylene PE — Part 3: Malleable cast iron fittings with compression ends for polyethylene PE piping systems.
Threaded pipe fitting in malleable cast iron. Part 1: Taper external threads and parallel internal threads. Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage systems — Part 5: Influencing factors for cast iron. EN ISO Mechanical filters. Part 3: Mounting and operating conditions for in-line valves and appliances ISO Plastics piping systems for hot and cold water installations — Polypropylene PP — Part 3: Fittings ISO Automatic electrical controls for household and similar use — Part Particular requirements for electrically operated water valves.
Laboratory tests on noise emission from appliances and equipment used in water supply installations. Requirements for performance. Part 2: Mounting and operating conditions for draw-off taps and mixing valves ISO Soft solder alloys. Part Particular requirements for storage water heaters IEC Fibre — cement.
Industrial-process control valves — Part 8: Noise considerations — Section 4: Plastics piping systems for hot and cold water installations— Polypropylene PP — Part 7: Automatic electrical controls for household and similar use — Part 1: General requirements IEC Method of measurement ISO Plastics piping systems for hot and cold water installations — Polypropylene PP — Part 2: Pipes ISO Household and similar electrical appliances -Safety.
Corrosion of metals and alloys.
Electrolytic treatment systems with aluminium anodes Requirements for performance. Ductile iron wide tolerance couplings and flange adaptors for use with pipes of different materials: Mounting and operating conditions for special appliances ISO Plastics piping systems for hot and cold water installations — Polypropylene PP — Part 5: Fitness for purpose of the system ISO Grey iron. Water conditioning equipment inside buildings. Water equipment inside buildings.
Requirements for performances. Plastics piping systems for hot and cold water installations — Polypropylene PP — Part 1: General ISO Determination Particular requirements for instantaneous water heaters IEC Household and similar electrical appliances.
Earthing arrangements. Plastics piping systems for hot and cold water installations — Polybutylene PB — Part 7: Plastics piping systems for hot and cold water installations— Crosslinked polyethylene PE-X — Part 7: Plastics piping systems for hot and cold water installations — Crosslinked polyethylene PE-X — Part 1: Plastics piping systems for hot and cold water installations — Crosslinked polyethylene PE-X — Part 3: Electrical installations of buildings.
ISO IEC Plastics piping systems for hot and cold water — Polybutylene PB — Part 1: Plastics piping systems for hot and cold water installations — Polybutylene PB — Part 2: Plastics piping systems for hot and cold water installations — Polybutylene PB — Part 3: Plastics piping systems for hot and cold water installations — Crosslinked polyethylene PE-X — Part 2: Plastics piping systems for hot and cold water installations — Crosslinked polyethylene PE-X — Part 5: Selection and erection of electrical equipment.
Attention is drawn to national or local regulations and requirements. Plastics piping systems for hot and cold water installations — Polybutylene PB — Part 5: The design and selection of materials shall take into consideration the service conditions and water quality. Where these are not available national standards or local regulations should be used. Figure 2. Vented potable water installations. Information and criteria about the reasonable choice of metal pipe material taking into account corrosion likelihood is given in EN to —5.
Unless otherwise specified in European Standards. Installation types A and B may be combined. The potable water installation shall be designed to: Closed potable water installations. Figure 3. All pipes and joints of a potable water installation shall be designed for a service life of 50 years taking into account appropriate maintenance and specific operating conditions.
The test pressure shall be at least 1. Surge pressures resulting from the operation of valves in fire extinguishing and fire protection systems which are operated no more than once a month for test purposes and otherwise only in the event of a fire are excluded from this requirement. There shall be no cross connection of systems carrying water from different water suppliers or of different sources from one supplier. If not required in national or local regulations the sum of operation pressure and surge pressure should not exceed test pressure of the installation.
See EN Lead pipes and -fittings shall not be used.
Pipe joints shall be permanently water-tight under the alternating stresses occurring in operation. Basically two different designs will be distinguished: Other materials and systems can be used if they comply with the general requirements given in 3. For the latter. Thread according to EN b Thread on transition fittings c See national regulations and standards d Corrosion risks have to be considered. Sockets with spigot ends according to EN Copper alloy compression fittings. Pipes see EN Copper and copper alloy capillary fittings for soldering and brazing.
Galvanized malleable cast iron fittings are normally used for jointing. Protective coatings and linings may be required. For push fit fittings see prEN For threaded ends see EN Fluxes containing chlorides. Hot dip galvanized malleable cast iron fittings according to EN Small copper connections to large stainless steel tanks should be avoided. Solders shall be tin copper alloy No Site formed bends shall not be used to avoid damage to galvanizing.
EN Pipes. Further statements Pipes. Only joints with fitness for purpose of the PE-piping system according to EN Socket fittings according to EN X - permissible not permissible Only joints with fitness for purpose of the PE-piping system according to EN Only joints with fitness for purpose of the PEpiping system according to EN X permissible - not permissible Pipes.
Hoses should not be longer than 2. In addition. This stop valve shall. A servicing valve shall be provided on the inlet connection to appliances e. The supply pipes for each storey and those in the individual flats shall be capable of being shut off separately. This stop valve shall be installed either inside or outside the building in a position to which every occupier of the premises supplied has access.
Proof of compliance with this requirement shall be provided by the manufacturer. In every building or part of a building to which a separately chargeable supply of water is provided and in all premises occupied as a dwelling. This stop valve shall be located in the main building as near as practicable to the exit point of the supply pipe to the other structure or if this is not practicable in the other structure itself as near as possible to the point of entry of the supply.
All hoses used instead of pipes and which are permanently under pressure shall comply with 3. The applicable test method should be agreed between the manufacturer and the customer. Elastomeric expansion joints shall have a minimum lifetime of 10 years when fitted according to manufacturers instructions. The use of elastomeric expansion joints in a potable water system is only permitted if they have been suitably approved implying their adequacy of design and material.
Pipes shall not be laid through drains or sewers. Pipework may be boxed in. Where a supply provides water to more than one building a riser shall be installed in each building. In the case where less frequent use is made of the draw off capacity. Fire protection has to be maintained. Except where a pipe is installed in a sleeve. In a dwelling divided into a number of flats. If colour code is used for this purpose. Pipe runs to cold water taps within buildings shall not follow the routes of space heating or hot water pipes or pass through heated areas such as airing cupboards or.
Where pipes for hot and cold potable water are arranged one above another. Special measures e. Draining taps should be fixed over a drain or have provision for discharging the water to the nearest convenient point for disposal.
The pipework within each building shall be connected to potential equalizing bars. Draw-off points for non-potable water shall be identified with the words "Non-potable water" or by a prohibition sign as shown in figure 1. Water outlets shall only be placed in positions where there is a drainage system of sufficient capacity.
A servicing valve shall be fitted upstream of. If the majority of draw-off points on industrial premises are for non-potable water. Buried metal service pipes that service a number of buildings shall be fitted with isolators both before leaving one building and after entering another.
The hot potable water installation shall not be used for space heating purposes except for towel rails. In respect to the prevention of growth of legionella bacteria national or local regulations shall apply. The hot water system shall comply with EN EN and EN In cistern fed installations this valve shall be fitted close to the feed cistern. A service valve shall be provided in a convenient and accessible position in every cold feed pipe. At outlets where particular attention is required for the control of temperature such as hospitals.
At shower installations etc. Protection against cross flow shall be in accordance to EN Non-thermostatically controlled mixing valves shall not be used to control the water to more that one outlet simultaneously. The difference in temperature between flow and return connections on the water heater shall be equal or less than 5 K. In this case. The control and safety devices in a and b above shall be factory fitted by the manufacturer. The reliability and durability of the equipment on which the safety of the installation depends should be considered.
If it is a national or local mandatory requirement that unvented appliances shall have all necessary safety devices fitted to them at the factory. It is essential that components independently assessed to relevant European Standards or appropriate national standards or local regulations should be used for all equipment on which safety depends and should be suitably marked to prevent faulty adjustment or incorrect replacement.
Pressure control devices such as pressure relief valves. A notice drawing attention to maintenance requirements should be provided in a prominent position for the operator. Systems dependent on good maintenance for their continued safety should not be installed without reasonable expectation that this will exist.
Safety units. The discharge pipe from the tundish shall be laid to a gradient for draining and shall be of a suitable material. Hydraulic control units shall comply with EN Where necessary. No valves shall be fitted between the temperature and pressure relief valve and the vessel. The discharge shall be through an air-break over a tundish see EN located in the same room or internal space and vertically within mm of the temperature and pressure relief valve.
The discharge from a temperature and pressure relief valve or an expansion valve shall be located so that it cannot create a hazard to persons in and around the building or cause damage to electrical components and wiring. Where an electro-mechanical motorized valve forms part of a temperature-operated manually reset energy cut-out.
See Temperature and pressure relief valves shall comply with EN In the case of hot water storage heaters provided with a primary heater i. The size of the tundish discharge pipe shall be at least one size larger than the nominal outlet size of the valve.
Any discharge from expansion valves shall be disposed of safely and be readily visible. See also The meter shall be protected against damage.
Mounting of water meter assemblies shall ensure that stresses induced on removal of the water meter or any other component can be minimised or accommodated by the remaining pipework. The materials used in the construction of water conditioning equipment shall be adequately resistant to all likely physical. Aspects for water conditioning see clauses B. If it is possible to avoid these locations. Expansion loops or a suitable alternative shall be used for long straight lengths of pipe to facilitate pipe movement.
Laboratory test methods on noise emission from appliances and equipment are described in EN ISO to Pipework should be adequately supported so that they are not in direct contact with the structure. National regulations for maximum noise level and test methods should be taken into account. Pipes shall not be rigidly fixed to lightweight panels. Open cell and fibrous insulating materials shall be provided with vapour barrier bonded to the outer surface of the insulation.
Draining facilities are required for maintenance and repair. Where pipes rise from the ground. The requirements for insulation against heat gain are similar to those for insulation against heat loss.
Whatever its position relative to an external wall. Above ground pipework outside heated buildings shall be provided with means of draining.
When fixing pipes and fittings that are to be insulated. Where pipes rise from below the ground. Use of pumping should be minimised by making maximum use of mains pressure.
Figure 3 shows an example of the pressure conditions in which the installation of a pressure booster is necessary because of the lowest normal service pressure. Insulation to prevent condensation can be subject to the same requirements as insulation against heat loss and gain. It is necessary to determine whether the pressure booster is necessary for the complete building or whether it is only required for storeys which cannot be constantly supplied with the minimum supply pressure.
In the limit case. Energy conservation should be considered when installing pressure boosting systems. Any degradation of the potable water quality shall be prevented. As a rule. The system may be operated without a pressure tank on the intake pressure side of the pumps. Since there is no risk of a health hazard contaminating the drinking water in the closed system a direct connection is preferred to an indirect connection.
For this purpose it is necessary to ask the responsible public water supplier for data relating to the material and the nominal size of the service pipe. An adequately sized drainage connection is necessary.
Pressure vessels should be installed such that they can be inspected on all sides. It should not be possible for noxious gases to penetrate the room. The conditions for connection specified in The pressure reducing valve shall be installed to achieve the same pressure in cold and hot water systems. A room not in the immediate neighbourhood of sleeping or living accommodation should be selected to accommodate the pressure booster.
In such cases. In order to avoid unacceptable pressure surges.
It shall be easy to replace them. If expansion pipes are used to dampen vibration. Noise-insulated installation of the pressure booster is recommended. Other than where required by national or local regulations. Stop valves and a pressure tapping shall be provided upstream and downstream of the pressure reducing valve for regulation and servicing purposes.
The design. The design should be such that there will be adequate renewal of water in the service pipe when water is drawn from the supply pipes.
Any local bye-laws or building regulations relating to fire protection shall be observed. If such installations are connected to potable water supply systems. If this is unavoidable.
Manufacturer's special instructions shall be taken into consideration. A run of pipe with a length of at least 5 times the internal diameter should be installed as a run-out section on the delivery side of a pressure reducing valve in order to prevent back pressure effects. For this purpose. The pressure reducing valves shall be selected in accordance with the actual operating conditions and set so that water flows through both valves. Where they are permanently charged with water.
If parts of the system located on the delivery side can be overloaded by an unacceptable high pressure in the event of incomplete closure of the pressure reducing valve.
If a bypass pipe is necessary for operating reasons this shall also be fitted with a pressure reducing valve. The quantity of water required according to the hazard classification and design criteria shall be agreed with the water supplier. Pressure reducing valves shall not be sized according to the nominal size of the pipe lines but the required flow rate. Users of British Standards should make sure that they possess the latest amendments or editions.
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