BS-EN-13785-2005-A1-2008.pdf

BRITISH STANDARD BS EN 13785:2005 Regulators with a capacity of up to and including 100 kg/h, having a maximum nominal outlet pressure of up to and including 4 bar, other than those covered by EN 12864 and their associated safety devices for butane, propane or their mixtures ICS 23.060.40 ? +A1:2008 Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI BS EN 13785:2005+A1:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2005 © BSI 2009 ISBN Amendments/corrigenda issued since publication DateComments National foreword This British Standard is the UK implementation of EN 13785:2005+A1:2008 It supersedes BS EN 13785:2005 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by The UK participation in its preparation was entrusted to Technical Committee A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. ? ? 30 April 2009 Implementation of CEN amendment A1:2008 . . GSE/24, Dedicated LPG appliances. 978 0 580 66967 5 Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13785:2005+A1 November 2008 ICS 23.060.40 Supersedes EN 13785:2005 English Version Regulators with a capacity of up to and including 100 kg/h, having a maximum nominal outlet pressure of up to and including 4 bar, other than those covered by EN 12864 and their associated safety devices for butane, propane or their mixtures Détendeurs de débit inférieur ou égal à 100 kg/h, à pression de détente nominale maximale inférieure ou égale à 4 bar, autres que les détendeurs relevant de l'EN 12864, et leurs dispositifs de sécurité associés pour butane, propane ou leurs mélanges Druckregelgeräte mit einem höchsten Ausgansdruck von 100). See the verification in D.5. D.3.2 Calculations Work out K from the linear regression dV = K dp. K is expressed in cubic centimetres per millibar (cm3/mbar). The value is acceptable if the coefficient is greater than or equal to 0,99. D.4 Measurement of the leak D.4.1 Method Fix a device to be tested onto the bench. The test pressure being always equal to ptest, close the shut-off valve at time t0 and record the pressure p1 at the time t1. D.4.2 Calculations Use the formula )x( +273,15 288,15 x 1013,25 +1013,25 x - 3600x=F 1test test test 01 pp ? p tt K where F is the value of the leak, expressed in cubic centimetres per hour (cm3/h); K is the coefficient obtained according to D.3, in cubic centimetres per millibar (cm3/mbar); t0 represents the start of test, expressed in seconds (s); t1 represents the end of test, expressed in seconds (s); ptest relative test pressure, expressed in millibar (mbar); p1 relative test pressure after a period t1, expressed in millibar (mbar); test is the ambient temperature, in degrees Celsius (°C). BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 54 D.5 Checks Check the control volume Vx using the following formula: Vx = K x (ptest + pa) where pa is the atmospheric pressure in millibars (mbar). Check that V dV x 100. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 55 Annex E (normative) Complementary test requirements for non metallic thermoplastic or thermal setting materials used in the construction of regulators E.1 Scope The requirements in this annex cover regulators made of non metallic (thermoplastic or thermal setting) materials in accordance with 5.2. E.2 Materials The materials used shall be suited to the use and guaranteed by the manufacturer. At the time of drafting of this document only the following material was considered for the body and/or cover and/or connections: Polybutylentherephtalate (Pbtp) with a 20 % to 30 % mass of glass fibre. However the manufacturer shall certify that the characteristics of the material used are not lower than the values in Table E.1. Table E.1 Minimum characteristics of non metallic materials Property Standard Unit Test method/ conditions Minimum value Mechanical Elongation at break EN ISO 527 % 23 °C 1 Bending resistance EN ISO 178 N/mm2 23 °C 150 Shock resistance EN ISO 180 kJ/m2 Method 1 at 23 °C 30 Thermal Dimensional stability EN ISO 75 °C Method A 1,80 MPa 190 E.3 Special conditions for carrying out the tests mentioned in the body of the document E.3.1 Resistance to impact (see 5.4.1 and 7.2.1) These tests shall be carried out at a temperature of (-20 ± 2) °C. E.3.2 Mechanical resistance of connections (see 5.4.3 and 7.2.3) These tests shall be carried out at (-20 ± 2) °C and at (+50 ± 2) °C. The duration of application of the forces and torques shall not be less than 15 min. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 56 E.3.3 Soundness (see 5.5 and 7.2.5) For regulators incorporating components which isolate an enclosure containing gas from the atmosphere and made of non metallic (thermoplastic or thermal setting) materials, this test shall be carried out under the following conditions: a) at (+50 ± 2) °C under the pressure conditions defined in 7.2.5; b) at (0 ± 2) °C for butane regulators, under the following pressure conditions: 1) through the inlet connection, 0,5 bar; 2) through the outlet connection, 150 mbar (or 220 mbar); c) at (-20 ± 2) °C for propane and LPG regulators, under the following pressure conditions: 1) through the inlet connection, 1 bar; 2) through the outlet connection, 150 mbar (or 220 mbar). E.4 Special requirements E.4.1 Resistance to hydrocarbons A sample of non metallic parts, which are likely to come into contact with LPG, shall be weighed, then immersed for (72 0 2 ) h into pentane at (20 + 5) °C. At the end of this period, the parts shall be withdrawn from pentane and wiped with absorbent paper. Parts shall be weighed after 2 min, then 24 h after their withdrawal from pentane. Check that: 2 min after the withdrawal from pentane, the increase in weight is less than 0,3 % of the initial mass; 24 h after the withdrawal from pentane, the loss in mass is less than 0,3 % of the initial mass. E.4.2 Resistance to cracking under stress and when chemical agents are present E.4.2.1 If glues or grease are used, they shall be compatible with the material used in accordance with the manufacturer's indications. E.4.2.2 If assembly components (screws, rivets, inserts, .) are essential for fixing, materials shall be such that the stresses created do not cause any cracking or deterioration of the material with time. The manufacturer shall indicate the maximum values of stresses applicable to materials so as to meet this requirement. E.4.3 Characteristics relating to fire resistance The body and/or the cover and/or the connections and non metallic parts of the gasways containing gas insulated from the atmosphere shall be made of materials belonging to self-extinction class FV-O in compliance with EN 60695-11-10. All the other external parts of the regulator which are made of non metallic materials shall belong to class FV-2 in accordance with EN 60695-11-10. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 57 The manufacturer shall certify the self-extinction class for the minimum thickness of the part to be tested. E.4.4 Accelerated ageing Regulators incorporating one or several external parts made of non metallic materials shall be subjected to the accelerated ageing test before carrying out the tests required by the document. Before carrying out the test cycles indicated below, the inlet and outlet of the regulator shall be tightly sealed. a) First cycle: UV The regulator shall be subjected to an energy of 1 120 W/m2 emitted by a xenon lamp under the conditions of EN ISO 4892-3. The exposure cycle, consisting of 20 h radiation and 4 h darkness, shall be repeated for 10 cycles. The test shall be carried out at a temperature of 55 °C with (90 + 5) % humidity. The regulator shall be fixed, in its normal operating position, onto a support which rotates so as to expose all sides to the energy. b) Second cycle: thermal shock The regulator shall be placed in a cryostatic cell at a temperature of (-25 + 2) °C. The test cycle shall include the following stages: 1) The regulator shall be kept in the cell for 10 min. 2) The regulator shall then be withdrawn from the cell and maintained at room temperature for a period t such that 2 min t 3 min. 3) The regulator shall then be placed in a thermostatic room at (55 ± 2) °C where it shall be maintained for 10 min. 4) Finally the regulator shall be removed and maintained at room temperature for a period t such that 2 min t 3 min. The regulator shall be subjected to 5 test cycles. E.5 Sampling and order of tests The manufacturer shall supply the components likely to come into contact with gas in sufficient number to allow them to be subjected to the tests indicated in E.4.1. The order of tests shall be that of Table 10 (see 7.1.4), however the ageing test of E.4.4 shall be carried out first in the case where the regulator incorporates external parts made of non metallic materials. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 58 Annex F (normative) Requirements for elastomeric reinforced diaphragms The reinforced material shall not show any sign of delamination when examined using 2 times magnification, during or after any of the tests carried out in accordance with EN 549. In addition, it shall not show any blisters in excess of 2 mm diameter, immediately after the 72 h immersion in liquid propene (95 % minimum propene) at (20 ± 5) °C. The corresponding test shall be carried out by limiting the contact with liquid propene to active surfaces of the diaphragm using an adequate test assembly. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 59 Annex G (normative) Inlet connections The different types of threaded and non threaded inlet connections used in different countries are given in Tables G.1 and G.2. Figures G.1 to G.49 give the types of threaded inlet connections (G.1 to G.27 are shown in this document) and G.50 onwards give the types of non threaded inlet connections. BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI 60 Table G.1 Threaded inlet connections used in the various countries (see 5.3.4.1) !Type Threaded connections Figure Country Code a G.1 G.2 G.3 G.4 G.5 G.6 G.7 G.8 G.9 G.10 G.11 G.12 G.13 G.14 G.15 G.16 G.17 G.18 G.19 G.20 G.21 G.22 G.23 G.24 G.25 G.26 G.27 G.28 G.34 AT x x x x x x BE x x CH x x x x x CY CZ x x x x x x x x x x x x x DE x x x x x x x x x x x x x x x x x DK x x x x EE ES x x x x x x FI x FR x x x x x x x x x x GB x x x x x x GR x x x x x x HU IE x IS IT x x x x x LT LU LV BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI 61 Table G.1 Threaded inlet connections used in the various countries (see 5.3.4.1) (concluded) Type Threaded connections Figure Country Code a G.1 G.2 G.3 G.4 G.5 G.6 G.7 G.8 G.9 G.10 G.11 G.12 G.13 G.14 G.15 G.16 G.17 G.18 G.19 G.20 G.21 G.22 G.23 G.24 G.25 G.26 G.27 G.28 G.34 MT NO NL x x PO PT x x x x SE x SI SK a Country codes are in accordance with EN ISO 3166-1.“ BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 62 Table G.2 Non-threaded inlet connections used in the various countries (see 5.3.4.1) !Type Non-threaded connections Figure Country code a G.50 G.51 G.52 G.53 G.54 G.55 G.56 G.57 G.58 G.59 G.60 G.61 AT BE CH CY CZ DE DK x x x x x x EE ES x FI FR x x x GB x x x x GR x x x x HU IE x IS IT x x x x LT LU LV MT NO NL PO PT x x x SE x SI SK a Country codes are in accordance with EN ISO 3166-1.“ BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 63 Dimensions in millimetres Dimensions en millimètres Abmessung in Millimeter Figure G.1 - Threaded connection 20 × × × × 1,814 L.H BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 64 Dimensions in millimetres Dimensions en millimètres Abmessung in Millimeter Figure G.2 - Threaded connection 21,7 × × × × 1,814 L.H. - 60° Hand tightened BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 65 Dimensions in millimetres Dimensions en millimètres Abmessung in Millimeter Figure G.3 - Threaded connection M16 × × × × 1,5 R.H BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 66 Dimensions in millimetres Dimensions en millimètres Abmessung in Millimeter Figure G.4 - Threaded connection 21,8 × × × × 1,814 L.H - 55° Spanner tightened BS EN 13785:2005+A1:2008 EN 13785:2005+A1:2008 (E) Licensed CopyChinese University of Hong Kong, 13/06/2009 05:18, Uncontrolled Copy, (c) BSI EN 13785:2005+A1:2008 (E) 67 Dimensions in millimetres Dimensions en millimètres Abmessung in Millimeter Figure G