BS EN 16678:2015
$189.07
Safety and control devices for gas burners and gas burning appliances. Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 48 |
This European Standard specifies the safety, design, construction and performance requirements and testing for automatic shut-off valves with or without modulating control functions (hereafter referred to as ‘valves’) for burners and appliances burning one or more gaseous fuels according to EN 437:2003+A1:2009 .
This European Standard is applicable to valves with declared maximum inlet pressures of more than 500 kPa (5 bar) and up to and including 6 300 kPa (63 bar).
This European Standard is applicable to
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electrically operated valves and to valves actuated by fluids including the pilot valves for these fluids if actuated electrically and including release valves, but not to any external electrical devices for switching the actuating energy;
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automatic shut-off valves where the flow rate is controlled by external electrical signals proportional to the applied signal.
This European Standard is not applicable to valves specifically designed for use in transmission and distribution networks.
NOTE
Provisions for final product inspection and testing by the manufacturer are not specified.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 8 | European foreword |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions |
| 11 | Figure 1 — Typical pilot and release valve application 4 Classification 4.1 Classes of control |
| 12 | 4.2 Groups of control 4.3 Classes of control functions 5 Units of measurement and test conditions 6 Construction requirements 6.1 General 6.2 Mechanical parts of the control 6.2.1 Appearance 6.2.2 Holes 6.2.3 Breather holes 6.2.4 Test for leakage of breather holes 6.2.5 Screwed fastenings |
| 13 | 6.2.6 Jointing 6.2.7 Moving parts 6.2.8 Sealing caps 6.2.9 Dismantling and reassembly 6.2.101 Closed position indicator switch 6.2.102 Valve with modulating control 6.2.103 Other controls assembled to a valve 6.2.104 Balanced valves 6.2.105 Additional requirements for shut-off function 6.2.105.1 Diaphragms that assist the shut-off function 6.2.105.2 Leakage test |
| 14 | 6.3 Materials 6.3.1 General material requirements 6.3.2 Housing 6.3.3 Test for leakage of housing after removal of non-metallic parts 6.3.4 Zinc alloys 6.3.5 Springs providing closing and/or sealing force 6.3.6 Resistance to corrosion and surface protection 6.3.7 Impregnation 6.3.8 Seals for glands for moving parts 6.3.101 Closure members 6.3.102 Parts transmitting the closing force 6.3.103 Balanced valves 6.3.104 Bellows |
| 15 | 6.3.105 Resistance to pressure 6.3.105.1 Requirement Table 1 — Minimum value of safety factor F 6.3.105.2 Test 6.4 Gas connections 6.4.1 Making connections |
| 16 | 6.4.2 Connection sizes 6.4.3 Threads 6.4.4 Union joints 6.4.5 Flanges 6.4.6 Compression fittings 6.4.7 Nipples for pressure test 6.4.8 Strainers 6.4.101 Welded connections 6.5 Electrical parts of the control 6.5.1 General 6.5.2 Switching elements 6.5.3 Electrical components |
| 17 | 6.6 Protection against internal faults for the purpose of functional safety 6.6.1 Design and construction requirements 6.6.2 Class A 6.6.3 Class B 6.6.4 Class C 6.6.5 Circuit and construction evaluation 6.101 Pneumatic and hydraulic actuating mechanisms 7 Performance 7.1 General 7.2 Leak-tightness 7.3 Test for leak-tightness |
| 18 | 7.4 Torsion and bending 7.5 Torsion and bending tests 7.6 Rated flow rate 7.7 Test for rated flow rate 7.8 Durability 7.8.1 Elastomers in contact with gas |
| 19 | Table 2 — Test method and acceptance criteria referred to the properties of elastomeric materials 7.8.2 Marking |
| 20 | 7.8.3 Tests for marking 7.8.4 Resistance to scratching 7.8.5 Scratch test 7.8.6 Resistance to humidity 7.8.7 Humidity test 7.9 Performance test for electronic controls 7.10 Long-term performance for electronic controls 7.101 Closing function concerning remanence 7.101.1 Requirement 7.101.2 Test of closing function |
| 21 | 7.102 Closing force 7.102.1 Requirement 7.102.2 Test of closing force 7.103 Delay time and opening time 7.103.1 Requirement 7.103.2 Test of delay time and opening time 7.104 Closing time 7.104.1 Requirement 7.104.2 Test of closing time |
| 22 | 7.105 Sealing force 7.105.1 Requirement Table 3 — Sealing force requirements 7.105.2 Test of sealing force 7.105.2.1 General 7.105.2.2 Class A valve 7.105.2.3 Balanced valve 7.106 Closed position indicator switch 7.106.1 Requirement |
| 23 | 7.106.2 Test of closed position indicator switch 7.107 Endurance 7.107.1 Requirement 7.107.2 Endurance test |
| 24 | Table 4 — Operating cycles 8 EMC/Electrical requirements 8.1 Protection against environmental influences 8.2 Supply voltage variations below 85 % of rated voltage 8.3 Short term voltage interruptions and decreases 8.4 Supply frequency variations 8.5 Surge immunity test 8.6 Electrical fast transient/burst 8.7 Immunity to conducted disturbances 8.8 Immunity to radiated fields 8.9 Electrostatic discharge immunity test 8.10 Power frequency magnetic field immunity test |
| 25 | 8.11 Electrical requirements 8.11.101 General 8.11.102 Electrical equipment 8.11.102.1 Degree of protection 8.11.102.2 Switches 8.11.102.3 Plug connections 8.11.102.4 Power saving circuits 8.11.102.4.1 Closing of the valve 8.11.102.4.2 Overheating 8.11.102.4.3 Test of power-saving circuits |
| 26 | 9 Marking, installation and operating instructions 9.1 Marking 9.2 Installation and operating instructions |
| 27 | 9.3 Warning notice |
| 28 | Annex A (informative) Gas connections in common use in the various countries |
| 29 | Annex B (informative) Leak-tightness test – volumetric method |
| 30 | Annex C (informative) Leak-tightness test – pressure loss method |
| 31 | Annex D (normative) Conversion of pressure loss into leakage rate |
| 32 | Annex E (normative) Electrical/electronic component fault modes |
| 33 | Annex F (normative) Additional requirements for safety accessories and pressure accessories as defined in EU Directive 97/23/EC |
| 34 | Annex G (informative) Materials for pressurized parts |
| 35 | Annex H (informative) Additional materials for pressurized parts |
| 36 | Annex I (normative) Requirements for controls used in DC supplied gas burners and gas burning appliances |
| 37 | Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) |
| 38 | Annex K (normative) Method for the determination of a Performance Level (PL) |
| 39 | Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance Level (PL) |
| 40 | Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels Table ZA.1 — Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels |
| 43 | Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC relating to pressure equipment Table ZB.1 — Correspondence between this European Standard and Directive 97/23/EC relating to pressure equipment |
| 45 | Bibliography |
