EN 16678:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasbrennstoffgeräte - Automatische Absperrventile für einen Betriebsdruck über 500 kPa bis einschließlich 6 300 kPaÉquipements auxiliaires pour brûleurs à gaz et appareils à gaz - Robinets automatiques de sectionnement pour pression de service supérieure à 500 kPa et inférieure ou égale à 6300 kPaSafety 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 6300 kPa27.060.20Plinski gorilnikiGas fuel burners23.060.40Pressure regulatorsICS:Ta slovenski standard je istoveten z:EN 16678:2015SIST EN 16678:2016en,fr,de01-februar-2016SIST EN 16678:2016SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16678
November
t r s w ICS
t uä r x rä v r English Version
Safety and control devices for gas burners and gas burning appliances æ Automatic shutæoff valves for operating pressure of above
w r r kPa up to and including
x
u r r kPaÉquipements auxiliaires pour brûleurs à gaz et appareils à gaz æ Robinets automatiques de sectionnement pour pression de service supßrieure à
w r r kPa et infßrieure ou ßgale à
x
u r r kPa
Sicherheitsæ und Regeleinrichtungen für Gasbrenner und Gasbrennstoffgeräte æ Automatische Absperrventile für einen Betriebsdruck über
w r r kPa bis einschließlich
x
u r r kPa This European Standard was approved by CEN on
s { September
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x x y zã t r s w ESIST EN 16678:2016

Gas connections in common use in the various countries . 26 Annex B (informative)
Leak-tightness test – volumetric method . 27 Annex C (informative)
Leak-tightness test – pressure loss method . 28 Annex D (normative)
Conversion of pressure loss into leakage rate . 29 Annex E (normative)
Electrical/electronic component fault modes . 30 Annex F (normative)
Additional requirements for safety accessories and pressure accessories as defined in EU Directive 97/23/EC . 31 Annex G (informative)
Materials for pressurized parts . 32 Annex H (informative)
Additional materials for pressurized parts . 33 Annex I (normative)
Requirements for controls used in DC supplied gas burners and gas burning appliances . 34 Annex J (normative)
Method for the determination of a Safety Integrity Level (SIL) . 35 Annex K (normative)
Method for the determination of a Performance Level (PL). 36 Annex L (informative)
Relationship between Safety Integrity Level (SIL) and Performance Level (PL) . 37 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels . 38 Annex ZB (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC relating to pressure equipment . 41 Bibliography . 43
Tables SIST EN 16678:2016
Figures Figure 1 — Typical pilot and release valve application .9
Key 1 control under test 2 pilot valve (normally closed) 3 release valve, normally open Figure 1 — Typical pilot and release valve application 3.103 maximum allowable pressure PS maximum pressure for which the body, its inner metallic partition walls and some other pressure containing parts are designed 3.104 specific maximum allowable pressure PSd differential pressure between pressure containing parts with different maximum allowable pressures 4 Classification 4.1 Classes of control EN 13611:2007+A2:2011, 4.1 is replaced by the following: — Class A valves Valves where the sealing force is not decreased by the gas inlet pressure. They are classified A according to the sealing force requirements of 7.105. Balanced valves according to this standard are Class A valves. — Class D valves Valves which are not subject to the requirements for the sealing force and fixed closing time. SIST EN 16678:2016

Closed position indicator switch Closed position indicator switches, where fitted, shall not impair the correct operation of valves. Adjusters shall be sealed to indicate interference. Any drift of the switch and actuating mechanism from its setting shall not impair correct valve operation. 6.2.102 Valve with modulating control Flow rates of valves with modulating control shall be adjustable over the full range as stated in the installation and operating instructions. If the adjustment of one flow rate affects the setting of any other flow rate, this shall be clearly stated in the installation and operating instructions. The setting of any flow rate shall require the use of mechanical or electrical tools and shall be designed to discourage unauthorized adjustment. 6.2.103
Other controls assembled to a valve Other controls assembled to a valve shall not interfere with its shut-off function. 6.2.104 Balanced valves The closure member of a balanced valve shall have a resulting force in the closing direction where the sealing force is not decreased by the gas inlet pressure. For a balanced valve with one single valve seat a resulting force in the closing direction shall remain, if the balancing force is removed. The closure member shall have the same closing direction as the flow direction through the valve. 6.2.105 Additional requirements for shut-off function 6.2.105.1 Diaphragms that assist the shut-off function Shut-off functions using a diaphragm to apply (part of) the closing force to the closure member shall be designed in such a way that, when the diaphragm is damaged, the closure member closes and the maximum internal leakage rate of the valve is limited to 1 dm3/h. Conformity shall be verified by the method given in 6.2.105.2. 6.2.105.2 Leakage test Rupture the diaphragm assisting the shut-off function. De-energize the valve. Measure the internal leakage rate of the valve according to EN 161:2011+A3:2013, 7.3.3. SIST EN 16678:2016

Closure members Closure members of valves shall either have a mechanical support (e.g. metallic) to withstand the sealing force or shall be made of metal. 6.3.102
Parts transmitting the closing force Parts transmitting the closing force shall be made of metal and shall be designed to withstand a force equal to 5 times the closing force. 6.3.103
Balanced valves The strength of the connection between closure members of a balanced valve shall be at least five multiplied by the maximum inlet pressure multiplied by the total opening area of the closure members. 6.3.104
Bellows When bellows are used as sealing elements proof of limiting fatigue stress shall be provided for at least the number of cycles stated in Table 4. For the calculation not less than the number of cycles as stated in Table 4 shall be taken for the respective nominal widths. SIST EN 16678:2016

For parts of the body stressed by forces from torque and bending moments (pipelines) only Rolled and forged steel 1,70 2,13 Cast steel 2,00 2,50 Spheroidal graphite cast iron and malleable cast iron 2,50 3,13 Copper-zinc wrought alloys and aluminium alloys 2,00 2,50 Copper-tin cast alloys and copper-zinc cast alloys 2,50 3,13 Aluminium cast alloys Amin 4 % 2,50 3,13 Aluminium cast alloys Amin 1,5 % 3,20 4,00 6.3.105.2 Test The hydrostatic pressure test is conducted after leakage and function tests. The test is carried out in such a manner that deformations of the test sample in all directions are possible. There shall be no additional stresses due to bending, torque or tension. The test is carried out with water at ambient temperature at a pressure according to the values in Table 1 for 5 min. The test may also be carried out with air or nitrogen, if the necessary safety measures are taken. Chambers separated by diaphragms are pressurized on both sides of the diaphragm at equal pressure. 6.4 Gas connections 6.4.1 Making connections Shall be according to EN 13611:2007+A2:2011, 6.4.1 with the following addition: If the valve is equipped with welding ends for welding to the pipe, EN 13611:2007+A2:2011, 6.4.1 is not applicable. SIST EN 16678:2016

Welded connections If connections are made by welding using welding ends, these welding ends shall be according to EN 12627:1999 or EN 12760:1999. 6.5 Electrical parts of the control 6.5.1 General Shall be according to EN 13611:2007+A2:2011, 6.5.1. 6.5.2 Switching elements EN 13611:2007+A2:2011, 6.5.2 is not applicable. 6.5.3 Electrical components Shall be according to EN 13611:2007+A2:2011, 6.5.3. SIST EN 16678:2016

Pneumatic and hydraulic actuating mechanisms Pneumatic or hydraulic actuated valves shall be provided with protection to ensure that the blockage of an orifice in the control system does not adversely affect the performance requirements as given in Clause 7. If the performance of the actuating mechanism depends on the quality of compressed air or hydraulic fluid, appropriate information shall be given in the installation and operating instructions. 7 Performance 7.1 General Shall be according to EN 13611:2007+A2:2011, 7.1 with the following addition: Where valves are specified for using pilot and/or release valves the assembly shall fulf
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