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BS EN 16678:2022

BS EN 16678:2022

$198.66

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 2022 52
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EN 13611:2019, Clause 1 applies with the following modification and addition: Modification: The 1st paragraph of EN 13611:2019, Clause 1 is replaced by: This document specifies the safety, design, construction, and performance requirements and testing for automatic shut-off valves for burners and appliances burning one or more gaseous fuels, hereafter referred to as “valves”. This document is applicable to valves with declared maximum inlet pressures of more than 500 kPa and up to and including 6 300 kPa and of nominal connection sizes up to and including DN 250. Addition: This document is applicable to: – electrically actuated valves; – 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; – valves where the flow rate is controlled by external electrical signals proportional to the applied signal; – valves fitted with closed position indicator switches. This document is not applicable to valves specifically designed for use in transmission and distribution networks. The 4th paragraph of EN 13611:2019, Clause 1 is removed.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Classification
4.1 Classes of control
4.2 Groups of control
4.3 Classes of control functions
4.4 Types of DC supplied controls
5 Units of measurement and test conditions
6 Construction requirements
6.1 General
6.2 Mechanical parts of the control
6.2.1 Appearance
15 6.2.2 Holes
6.2.3 Breather holes
6.2.4 Screwed fastenings
6.2.5 Jointing
6.2.6 Moving parts
6.2.7 Sealing caps
6.2.8 Dismantling and reassembly
6.2.9 Auxiliary canals and orifices
6.2.10 Presetting devices
6.2.101 Closed position indicator switch
6.2.102 Valve with modulating control
16 6.2.103 Balanced valves
6.2.104 Additional requirements for shut-off function
6.3 Materials
6.3.1 General material requirements
6.3.2 Housing
6.3.2.1 Requirements
6.3.2.2 Test
6.3.3 Zinc alloys
6.3.4 Springs providing closing and/or sealing force
6.3.5 Resistance to corrosion and surface protection
6.3.6 Impregnation
17 6.3.7 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
6.4 Gas connections
6.4.1 Making connections
6.4.2 Connection sizes
6.4.3 Threads
6.4.4 Union joints
6.4.5 Flanges
18 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
6.5.3.1 Performance of electrical components
6.5.3.2 Tests
6.5.3.3 Sensing element
6.5.3.4 Gas controls employing electrical components in the gas circuit
6.6 Protection against internal faults for the purpose of functional safety
6.101 Pneumatic and hydraulic actuating mechanisms
19 7 Performance
7.1 General
7.2 Leak-tightness
7.2.1 Requirements
7.2.2 Tests
7.3 Torsion and bending
7.3.1 General
20 7.3.2 Torsion and bending moments
7.4 Rated flow rate
7.5 Durability
7.5.1 Elastomers in contact with gas
21 7.5.2 Durability of Marking
7.5.3 Resistance to scratching
7.5.4 Resistance to humidity
7.5.5 Lubricants in contact with gas
7.6 Performance tests for electronic controls
7.7 Long-term performance for electronic controls
7.8 Data Exchange
7.101 Closing function
7.101.1 Requirement
7.101.2 Test of closing function
22 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
23 7.105 Sealing force
7.105.1 Requirement
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
24 7.106.2 Test of closed position indicator switch
7.107 Endurance
7.107.1 Requirement
7.107.2 Endurance test
25 7.107.3 Endurance test for closed position indicator switch
8 Electrical requirements
8.1 General
8.2 Protection by enclosure
8.101 Switches
26 8.102 Plug connections
8.103 Power saving circuits
8.103.1 Closing of the valve
8.103.2 Overheating
8.103.3 Test of power-saving circuits
9 Electromagnetic compatibility (EMC)
9.1 Protection against environmental influences
27 9.2 Supply voltage variations below 85 % of rated voltage
9.3 Voltage dips and interruptions
9.4 Supply frequency variations
9.5 Surge immunity tests
9.6 Electrical fast transient/burst
9.7 Immunity to conducted disturbances induced by radio frequency fields
9.8 Immunity to radiated disturbances induced by radio frequency fields
9.9 Electrostatic discharge tests
9.10 Power frequency magnetic field immunity tests
9.11 Harmonics and interharmonics including mains signalling at a. c. power port, low frequency immunity tests
10 Marking, instructions
10.1 Marking
28 10.2 Instructions
29 10.3 Warning notice
30 Annex A (informative)Abbreviations and Symbols
31 Annex B (informative)Leak-tightness test for gas controls – volumetric method
32 Annex C (informative)Leak-tightness test for gas controls – pressure loss method
33 Annex D (normative)Calculation of pressure loss into leakage rate
34 Annex E (normative)Electrical/electronic component fault modes
35 Annex F (normative)Additional requirements for safety accessories and pressure accessories as defined in EU Directive 2014/68/EU
36 Annex G (normative)Materials for pressurized parts
37 Annex H (normative)Additional materials for pressurized parts
38 Annex I (normative)Requirements for controls used in DC supplied gas burners and appliances burning gaseous or liquid fuels
39 Annex J (normative)Method for the determination of a Safety Integrity Level (SIL)
40 Annex K (normative)Method for the determination of a Performance Level (PL)
K.1 Scope
K.2 Normative references
K.3 Terms and definitions
K.4 Performance
K.4.1 Operation mode
K.4.2 PL and field data evaluation
K.4.3 Hardware failure tolerance (HFT)
K.4.4 Common cause failure (CCF)
K.4.4.1 General
K.4.4.2 Estimation of effect of CCF
41 K.4.5 Safe failure fraction (SFF)
K.4.6 Determination of the B10d value
K.4.6.1 Requirements
K.4.6.2 Tests
42 K.4.7 Determination of Performance Level (PL)
K.4.8 PFHD values for structures consisting of two controls
K.5 Marking, instructions
K.5.1 Marking
K.5.2 Instructions
K.5.3 Warning notice
43 Annex L (informative)Relationship between Safety Integrity Level (SIL) and Performance Level (PL)
44 Annex M (normative)Reset functions
45 Annex N (informative)Guidance document on Environmental Aspects
46 Annex O (normative)Seals of elastomer, cork and synthetic fibre mixtures
47 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Regulation (EU) 2016/426 aimed to be covered

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BS EN 16678:2022
$198.66