BS 4213:2004
$142.49
Cisterns for domestic use. Cold water storage and combined feed and expansion (thermoplastic) cisterns up to 500 l. Specification
| Published By | Publication Date | Number of Pages |
| BSI | 2004 | 30 |
This British Standard specifies requirements for the materials, physical properties and performance of cold water storage cisterns and combined feed and expansion cisterns of up to 500 l capacity, from which water is drawn for domestic purposes. It also specifies requirements for the associated fittings of such cisterns, i.e. covers, screened breathers, screened warning pipes and vent pipe entry devices, and for cistern insulation. It gives methods of test for the evaluation of the properties of cisterns and covers made by any of the processes currently available.
This British Standard applies only to cisterns that are manufactured from thermoplastics, and that have covers manufactured either from thermoplastics or from other manufactured materials having a thermoplastics layer on the inside face. It covers both circular and non-circular cisterns, but does not apply to flushing cisterns.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references 3 Terms and definitions additional fitting kit capacity |
| 6 | 3.3 cisterns cistern cold water storage cistern combined feed and expansion cistern 3.4 pipes breather warning pipe vent pipe top of a cistern water line 4 General Position of water line |
| 7 | 5 Materials 5.1 General 5.2 Carbon black 5.3 Rework 6 Configuration 7 Performance requirements 7.1 General 7.2 Resistance to deformation 7.3 Resistance to deflection |
| 8 | 7.4 Fatigue resistance 7.5 Impact resistance 7.6 Tensile strength and elongation at break 7.7 Resistance to reversion 7.8 Resistance to sprue strain 7.9 Resistance to delamination 7.10 Weathering 7.11 Hot water resistance |
| 9 | Types of delamination |
| 10 | 8 Covers 8.1 General 8.2 Fit of the cover 8.3 Materials for covers 8.4 Construction of covers 8.5 Impact resistance of covers 8.6 Float-operated valve clearance |
| 11 | 9 Marking 9.1 Designation 9.2 Marking of cisterns Installation instructions |
| 12 | 9.3 Marking of covers 10 Additional fittings 10.1 General 10.2 Screened breather (breather) 10.3 Vent pipe entry device 10.4 Screened warning pipe termination assembly |
| 13 | 10.5 Thermal insulation 10.6 Particle ingress limitation between the cistern and fittings 10.7 Additional fitting kit |
| 14 | Annex A (informative) Notes on installation of cisterns Annex B (normative) Method of test for determination of toluene extract of carbon black Apparatus and reagent Paper extraction thimbles, Toluene, Soxhlet extractor, Shallow borosilicate glass weighing dish Procedure Place 5 g to 8 g of pelletized carbon black or 2 g to 5 g of compressed fluffy black in an extrac… Assemble the Soxhlet extraction apparatus and extract for 22 h. Transfer the extract solution into the weighing dish ( Cool in a desiccator to room temperature and weigh. |
| 15 | Calculation Annex C (normative) Sampling and testing Type testing Type tests |
| 16 | Routine testing Routine tests Annex D (normative) Methods of test for resistance to deformation Method�1: circular cisterns The cistern shall be tested with the cover in place. Place the cistern on a flat level base. Make a circumferential measurement parallel to the base a… Fill the cistern to the water line at a rate of not less than 23 l/min with water at (23�±�2)�ºC. Float a continuous film of polyethylene over the whole of the surface of the water in the cistern… Maintain the temperature of the cistern and water at (23�±�2)�ºC and after 10 days make a circumf… Method�2: non-circular cisterns The cistern shall be tested with the cover in place. Place the cistern on a flat level base. Measure the internal length and width of the cistern on t… Float a continuous film of polyethylene over the whole of the surface of the water in the cistern… Maintain the temperature of the cistern and water at (23 ± 2)�ºC, and after 10 days make measurem… |
| 17 | Centreline measurement Calculate the percentage deformation in each direction as follows: Annex E (normative) Method of test for resistance to deflection Apparatus Thin-walled copper tube Procedure Place the cistern on a flat level base, with the copper tube ( Fit any backing plate normally supplied with the cistern, then fill the cistern to the top with w… Apply a force of 37�N vertically downwards at the end of the tube as shown in Maintain the force for 1�h and take a further reading. Calculation |
| 18 | Arrangement for the deflection test and fatigue test |
| 19 | Annex F (normative) Method of test for fatigue resistance Apparatus Thin-walled copper tube Procedure Place the cistern on a flat level base, with the copper tube ( Fit any backing plate normally supplied with the cistern, and then fill the cistern to the water … Apply a force of 22.5 N vertically downwards to the end of the tube, and allow the tube to move f… Resonate the end of the tube under this load in the vertical axis of the cistern at a rate of not… Annex G (normative) Method of test for impact resistance Invert the cistern and maintain it at a temperature of (23�±�2)�ºC for a period of not less than … Strike the cistern four times with a 25 mm diameter hemispherical-ended striker of mass 2.5�kg fa… Annex H (normative) Method of test for tensile strength and elongation at break Carry out the test in accordance with�BS�EN�ISO�527�1, except for the following. In the case of a cistern having composite walls, carry out the test on specimens moulded from pol… |
| 20 | Annex I (normative) Method of test for resistance to reversion Cut or punch five specimens, 50 mm long and with a diameter of 2.5 mm, from the cistern in each o… Record the initial lengths of the individual specimens. Test the specimens under the conditions specified in Testing conditions for reversion and sprue strain On removal, allow the specimens to cool to room temperature for a period of 1 h, and then measure… Express the reversion as the percentage reduction in length of the specimens. Annex J (normative) Method of test for resistance to sprue strain The specimen shall consist of a 75 mm diameter disc, with the sprue at the centre, cut from the b… Make a slit in the specimen (38 ± 1.5) mm long, such that its mid-point lies on the centre of the… Test the specimens under the conditions specified in On removal, allow the specimens to cool with no applied constraint. Measure and record the maximum distance between the edges of the slit. |
| 21 | Annex K (normative) Method of test for resistance to delamination Cut or punch four specimens, 50 mm long and with a diameter of 2.5 mm, from the base of the ciste… Immerse the specimens in the relevant medium given in Immersion media Examine the extent of delamination in the polyolefin and compare it with the examples given in� Annex L (normative) Method of test for weathering Apparatus Weathering apparatus Cylindrical rack Procedure Take two sets of two test specimens from the cistern as described in Mount the specimens on the cylindrical rack, 457�mm from the central vertical axis of the light s… For each set of specimens, test half the set in accordance with Annex M (normative) Method of test for hot water resistance Apparatus |
| 22 | Typical installation for hot water test: elevation |
| 23 | Typical installation for hot water test: plan view Procedure Install the cistern in accordance with the manufacturer’s instructions. Do not apply any insulati… Fill the installation with cold water to the water line and switch on the heater for a continuous… At the end of this time switch off the heater and allow a period of not less than (120�±� Annex N (normative) Method of test for closeness of cover fitting Apparatus Single pulley Cord Weights |
| 24 | Typical installation for cover fitting test Procedure Fill the cistern with water to the water line and fit the cover as recommended by the manufacturer. Position a free-running pulley ( Apply a weight ( |
| 25 | For rectangular cisterns, repeat the test on all four sides in the direction of each side of a re… Annex O (normative) Method of test for the assessment of ingress of particles Apparatus Typical installation of cistern in test box for the particle ingress test Test box |
| 26 | Polyethylene particles Vacuum pump and connection U-tube manometer Procedure Remove the cover from the test box. Install the cistern, cover and fittings to be evaluated in the test box ( Partly fill the test box with polyethylene particles ( Fill the cistern with water at a temperature of (20�±�5)�ºC to the water line and fit the cover t… Replace the cover on the test box and ensure that it is airtight. Activate the air supply so that the particles remain airborne. Activate the vacuum pump ( At the end of the test, shut off the equipment, examine the filter paper or bag in the vacuum pum… Annex P (normative) Method of test for determining the impact resistance of covers Support the cover on a cistern of the appropriate dimensions and maintain it at a temperature of … Strike the cover with a 25 mm diameter hemispherical-ended striker of mass 2.5 kg falling freely … Annex Q (normative) Method of test for thermal insulation General |
| 27 | Apparatus Apparatus for the insulation test 25.1 gallon (114 l) capacity cistern Test bed Vent pipe Procedure Arrange the cistern, excluding the cover, on the test bed. Fit the insulation in accordance with the manufacturer’s instructions but without the top insulat… If a lid is fitted, cut a hole to prevent any discharge from the vent pipe from entering the cist… |
| 28 | Position the temperature sensor, using the stand and/or fixings, at the centre of the cistern pla… Record the ambient room temperature, which shall be between 10�ºC and 25�ºC (see Fill the cistern to the normal water level with water at a temperature not less than (25�±�0.5)�º… Leave the apparatus to stand with agitation at the beginning, middle and end of the test, until t… Fit the cistern cover and top insulation. Commence the test period. After a period of 18 h ± 15 min, remove the top insulation and cistern cover and record the senso… |
