1 Scope This European Standard applies to hoses for extractable outlets of any material intended for equipping sanitary tapware for sinks and basins.. This European Standard specifies: —
Chemical and hygienic requirements
Materials that come into contact with drinking water must be safe for human health and should not alter the water's quality, appearance, smell, or taste.
Exposed surface condition and quality of coating
Visible chromium plated surfaces and Ni-Cr coatings shall comply with the requirements of EN 248
General
— the design and construction of components without defined dimensions permits various design solutions to be adopted by the manufacturer;
— permitted deviations from the defined dimensions are given in 7.3.
Connecting dimensions
The connecting dimensions of hoses for extractable outlets are specified in Table 2 and Figures 3 to 5
A G 1/2, G 3/8 or 15 × 1 mm or other EN ISO dimensions Connecting thread (tap side)
B G 1/2 Connecting thread (extractable outlet side) EN ISO 228-1
Major diameter of conical nut (if provided)
G 8,5 0/-1 mm Functional dimension on seal depth
K ≥ 30 mm Total length of conical nut α 3° 0/-1° mm Cone angle (if provided)
L ≥ 500 mm Total length of hose a) Conical nut b) Nut (shape unspecified)
Figure 4 — Female or male end (shape unspecified)
Special cases
Hoses for extractable outlets intended for special applications e.g when interchangeability is not a requirement, can incorporate the following dimensional deviations:
— connection to the tapware is guaranteed;
— threaded connections are in compliance with ISO standards;
— all other requirements of this standard are satisfied;
— the manufacturer's literature, including the installation instructions supplied with the hoses for extractable outlets, indicates clearly that the hoses for extractable outlets are special cases
General
The test described is a type test (laboratory test) and not a quality control test carried out during manufacture.
Flow rate
Test method
This clause describes a method for testing the flow rate of hoses.
Principle
The method involves measuring the flow rate through hoses for extractable outlets using cold water at temperatures not exceeding 30 °C, which is essential for determining the hose's flow rate class (refer to Table 1).
The flow rate of hoses for extractable outlets with special connection (see 7.3) delivered together with the tapware is measured in combination with the complete sanitary tapware
Apparatus
The test apparatus is shown in Figure 6.
Procedure
— Connect the G 1/2 size nut of the hose for extractable outlets to the pressure take-off tee, supporting the hose in a horizontal position;
— apply the required dynamic pressure using the horizontal axis of the hose as a datum;
— record the flow rate “Q” (Table 1) after stabilisation.
Requirements
Hoses for extractable outlets shall be classified according to the flow rate value “Q” at the required pressure as shown in Table 3
Supply system Flow rate / Pressure
Class 1 Q ≥ 0,25 l/s (15 l/min) at (0 3 , 0 + 0 02 , ) MPa (( 3 0 + 0 2 , ) bar)
Class 2 Q ≥ 0,15 l/s (9 l/min) at (0 3 , 0 + 0 02 , ) MPa ((3 0 + 0 2 , ) bar)
0,06 l/s < Q < 0,18 l/s (3,6 l/min < Q < 10,8 l/min) at (0 01 , 0 + 0 002 , ) MPa ((0 1 , 0 + 0 02 , ) bar)
Class H 0,18 l/s ≤ Q (10,8 l/min ≤ Q) at (0 01 , 0 + 0 002 , ) MPa ((0 1 , 0 + 0 02 , ) bar)
1 a means for supplying and maintaining the required pressures and temperatures of Table 3 with an accuracy of ± 1 % of the test value
3 a device for measuring the flow rate with an accuracy of 2 % of the test value
5 a pressure measuring device with an accuracy of ± 1 % of the test value
6 a temperature measuring device with an accuracy of ± 1 %
9 rigid tube for supporting the hose
Figure 6 — Apparatus for hydraulic characteristics (flow rate test rig)
General
The tests described are type tests (laboratory tests) and not quality control tests carried out during manufacture Each test has to be done with a new test sample.
Tensile strength
Test method
This clause describes a method for testing the tensile strength of the hose.
Principle
The principle of this test is to subject the hose to a tensile force for a specified time.
Apparatus
Equipment which allows the hose to be subjected to a longitudinal tensile force of 500 N
Figure 7 — Apparatus for measuring tensile force
Procedure
The test is carried out at ambient temperature
Condition the hose to be tested by storing for 3 h minimum at ambient temperature
Connect one end of the hose by its nut to a fixed union as shown in Figure 7 and apply gradually a force of
(500 ± 10) N at the other end for (300 ± 10) s.
Requirements
The hose must not experience any rupture or permanent deformation that could impair its functionality To ensure the hose's performance is intact, it will undergo a water tightness test using cold water at a temperature of ≤ 30 °C, applying the appropriate pressure as outlined in Table 4 This test will be conducted under static pressure for a duration of (120 ± 10) seconds.
Flexing durability test
Test Method
This clause describes a method for testing the flexing durability of the hose.
Principle
This test aims to assess the hose's durability by flexing it specifically at the connection point to the outlet, focusing on the area near the connecting nut.
Apparatus
The apparatus is detailed in Figure 8
— capable of rotating through an angle of 180° starting in position (a) turning anticlockwise to position (b) and returning clockwise to position (a);
— with nipples of G 1/2 or G 3/4 on the exterior of the shaft in order to fix the test samples
2 means for applying and maintaining air pressure in the test samples via the shaft
3 means of applying a force F of (5,0 ± 0,5) N to the free end of the hose e.g by means of a weight
Figure 8 — Apparatus for the flexing durability test
Procedure
— Connect the hose as shown in Figure 8, connecting the shower side to the rotating shaft
— Apply an air pressure of (0,1 ± 0,02) MPa ((1,0 ± 0,2) bar) to the test sample
— Rotate the shaft at a speed of (20 ± 5) cycles per minute for 5 000 cycles (one cycle is the movement from (a) to (b) and back again
— Carry out the test at ambient temperature
Requirement
The hose must not experience any rupture or permanent deformation that could impair its functionality To ensure the hose's performance is intact, it will undergo a water tightness test using cold water at a temperature of ≤ 30 °C, applying the appropriate pressure as outlined in Table 4 This test will be conducted under static pressure for a duration of (120 ± 10) seconds.
Durability test
Test Method
This clause describes a method for testing the durability of the hose.
Principle
This test is intended to verify the durability of the hose when it is pulled out of the faucet and then pushed back.
Apparatus
The apparatus is detailed in Figure 9.
Procedure
— Connect the hose as shown in Figure 9
— Apply a pressure P of (0,1 ± 0,02) MPa ((1,0 ± 0,2) bar) to the test sample
— Start an alternate movement with a frequency of 10 cycles per minute over a period of 10 000 cycles.
Requirement
The hose must not experience any rupture or permanent deformation that could impair its functionality To ensure the hose's performance is intact, it will undergo a water tightness test using cold water at a temperature of ≤ 30 °C, applying the appropriate pressure as outlined in Table 4 This test will be conducted under static pressure for a duration of (120 ± 10) seconds.
2 bend made of polished stainless steel to create friction with a bending radius of R = (4 ± 0,1) mm and a bending angle α of (30 ± 2)°
4 means for applying and maintaining a pressure P of (0,1 ± 0,02) MPa ((1,0 ± 0,2) bar) via the actuating device
Figure 9 — Apparatus for the flexing durability test
Pressure resistance at elevated temperature
Test method
This clause defines a method of testing the pressure and temperature resistance of the hose at the upper limits of use indicated in Table 1.
Principle
This test involves exposing the hose to elevated pressure and temperature conditions that exceed the recommended limits outlined in Table 1 for a designated duration.
Apparatus
The apparatus is detailed in Figure 10
1 means for supplying and maintaining the required pressures and temperatures
3 device for measuring the flow rate with an accuracy of 2 % of the test value
5 pressure measuring device with an accuracy of ± 1 % of the test value
6 temperature measuring device with an accuracy of ± 1 °C
8 rigid tube for supporting the hose (12)
Figure 10 — Apparatus for testing the pressure resistance of the hose under elevated temperatures
Procedure
To heat the hose to the test temperature of (70 ± 2) °C, connect the hose as illustrated in Figure 10 and pass water at the specified temperature through it at a flow rate of 0.08 to 0.12 l/s for 5 minutes After this initial heating period, adjust the 3-way valve to achieve a flow rate that sustains the test temperature.
Apply the appropriate dynamic pressure to the hose specified in Table 4 and maintain for (300 ± 10) s
Type 1 (0,5 ± 0,02) MPa ((5,0 ± 0,2) bar) Type 2 (0,2 ± 0,02) MPa ((2,0 ± 0,2) bar)
Requirements
— There shall be no visible leakage
— There shall be no permanent deformation which affects the function of the hose.
Thermal shock test
Test method
This test simulates use under conditions of extreme temperatures and establishes the integrity of the complete product.
Principle
The principle consists of subjecting the hose for extractable outlets to cycles of hot and cold water at a temperature equal to the limits of use.
Apparatus
The apparatus is detailed in Figure 11
1 means for supplying and maintaining the hot water temperature and pressure for the duration of the test
2 means for supplying and maintaining the cold water temperature and pressure for the duration of the test
3 means for alternating from hot to cold water and vice versa, within a time of maximum 2 s
4 means for measuring pressure with an accuracy of ± 1 % of the test value
5 means for measuring temperature with an accuracy of ± 1 °C
8 regulating valve adjusted to give the specified flow rate
Figure 11 — Apparatus for thermal shock test
The test circuit shall be capable of providing both hot water at (70 ± 2) °C and cold water at (20 ± 2) °C at a pressure of (0,1 ± 0,01) MPa ((1,0 ± 0,1) bar) at a flow rate between 0,08 l/s and 0,12 l/s
Procedure
Connect the extractable outlet to the test circuit and subject it to cycles of (120 ± 10) s cold water and then
(120 ± 10) s hot water with the flow rate between 0,08 l/s and 0,12l/s, but the pressures specified in Table 5 shall not be exceeded:
Table 5 — Pressure conditions for thermal shock test
Repeat this cycle continuously 300 times.
Requirements
The hose must not experience any rupture or permanent deformation that could impair its functionality To ensure the hose's performance is intact, it will undergo a water tightness test using cold water at a temperature of ≤ 30 °C, applying the appropriate pressure as outlined in Table 4 This test will be conducted under static pressure for a duration of (120 ± 10) seconds.
General
The test described is a type test (laboratory test) and not a quality control test carried out during manufacture
A hose equipped with a rotary connection allows for flexible movement of extractable outlets in relation to the shower outlet, ensuring proper functionality and preventing hose twisting.
Test Method
Principle
This test is intended to check the function of any rotary connection.
Apparatus
The apparatus is detailed in Figure 12
1 means of providing and maintaining the test pressure
2 means to measure the pressure with an accuracy of ± 1 % of the test value
4 device for clamping the hose
5 sealing plug with system for applying a torque
6 means for measuring the torque with an accuracy of ± 5 %
Figure 12 — Rotary connection test apparatus
Procedure
— Connect the hose to the supply circuit
— Seal the rotary connection with the plug and clamp the hose
— Apply cold water ≤ 30 °C at a static pressure with a value according Table 4
— Measure the torque necessary to initiate rotation of the plug in relation to the hose.
Requirements
The initial torque shall not exceed 0,1 Nm
2 both ends conforming to type A, EN 1254–2 [4]
Figure A.1 — Pressure take-off tee (test rig Type 1 taps)
Table A.1 — Dimensions of the pressure take-off tee
Dimensions of the pressure take-off tee
Nominal size of tap A B C E F J K L M Screws max min max min max min max min max min No Size
Figure A.2 — Schematic Examples of pressure take-off tees (test rig Type 1 taps)
Recommendation for the design of pressure take-off tees:
Figure A.2 shows three examples of pressure take-off tees giving equivalent results:
Requirements relating to the design and manufacture of pressure take-off tees are given in EN ISO 5167-1
1) The axis of the pressure orifices shall intersect the axis of the piping (or the casing) and be perpendicular to it; the opening of the orifice shall be circular and the edges flush with the wall of the piping (or the casing) with an angle as sharp as possible Slight rounding at entry is permitted (radius ≤ 1/10 diameter of the pressure orifice)
2) The diameter of the pressure orifice shall be less than 0,1 D (D; internal diameter of the tube or casing)
3) There shall be an even number (at least four) of the pressure orifices The angles formed by the arcs of the pressure orifices shall be approximately equal
4) The area of the free cross section of the annular chamber of the casing shall be greater than or equal to the half total area of the orifices connecting the chamber to the piping b) Annular slit:
1) The thickness f of the annular slit shall be equal to or greater than twice the width i of the slit
2) The area of the free section of the annular chamber should be equal to or greater than half the total area of the annular slit connecting the chamber to the piping
3) All surfaces coming into contact with the fluid measured shall be clean and well finished
4) The width of the annular slit shall be nominally 1 mm
[1] EN 200, Sanitary tapware — Single taps and combination taps for water supply systems of type 1 and type 2 — General technical specification
[2] EN 817, Sanitary tapware — Mechanical mixing valves (PN 10) — General technical specifications
[3] EN 1111, Sanitary tapware — Thermostatic mixing valves (PN 10) — General technical specification
[4] EN 1254-2, Copper and copper alloys — Plumbing fittings — Part 2: Fittings with compression ends for use with copper tubes
[5] EN 1286, Sanitary tapware — Low pressure mechanical mixing valves — General technical specification
[6] EN 1287, Sanitary tapware — Low pressure thermostatic mixing valves — General technical specifications
[7] EN 16145, Sanitary tapware — Extractable outlets for sink and basin mixers — General technical specification
[8] EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements (ISO 5167-1)