BRITISH STANDARD
Leak detection systems — Part 1: General principles
The European Standard EN 13160-1:2003 has the status of a Britis Bri tish h Sta Standar ndard d
ICS 23.020.01; 23.040.99; 29.260.20
BS EN 13160-1:2003
BS EN 13160-1:2003
National foreword This British Standard is the official English language version of EN 1316 13160-1: 0-1:200 2003. 3. The UK participation in its preparation was entrusted by Technical Committee PVE/21, Fabricated metallic tanks and equipment for storage tanks and f illing stations, to Subcommittee PVE/21/2/2, Leak detection devices, which has the responsibility to: —
aid enquirers to understand the text;
—
present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
—
monitor related international and European developments and promulgate them in the UK.
A list of organizations represented on this subcommittee can be obta ined on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI the BSI Electronic Catalogue or Catalogue or of British Standards Online. 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 does not of itself confer immunity from legal obligations.
This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 16 June June 200 2003 3
Summary of pages This document comprises a front cover, an inside front cover, the EN ti tle page, pages 2 to 35 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication publication Amd. No.
© BSI 16 16 June 2003
ISBN 0 580 42075 2
Date
Comments
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13160-1 May 2003
ICS 23.020.01; 23.040.99; 29.260.20
English version
Leak detection systems - Part 1: General principles Systèmes de détection de fuites - Partie 1: Principes généraux
Leckanzeigesysteme - Teil 1: Allgemeine Grundsätze
This European Standard was approved by CEN on 10 March 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
© 2003 CEN
All rights of exploitation exploitation in any form and by any means reserved reserved worldwide for CEN national Members.
B-1050 Brussels Brussels
Ref. No. EN 13160-1:2003 E
EN 13160-1:2003 (E)
Contents page Foreword......................................................................................................................................................................3 1
Scope ..............................................................................................................................................................3
2
Normative references ....................................................................................................................................3
3
Classes of leak detection systems ..............................................................................................................4
4
Terms and definitions....................................................................................................................................5
5 5.1 5.2 5.3 5.4 5.5 5.6 5.7
Requirements .................................................................................................................................................7 General............................................................................................................................................................7 Avoidance or reduction of ignition sources ...............................................................................................8 Leak indicating device...................................................................................................................................8 Function test of the audible alarm transmitter ...........................................................................................9 Device categories for explosion-proof parts of the leak detection system .............................................9 Inspection of equipment ...............................................................................................................................9 Instruction.......................................................................................................................................................9
6
Marking .........................................................................................................................................................10
7
System of evaluation of conformity...........................................................................................................10
Annex A (informative) Examples of leak detection systems ................................................................................11 Annex B (informative) Equipment categories for explosion-proof parts of the leak detection systems .........17 Annex C (normative) Evaluation of conformity ......................................................................................................18 Annex D (informative) Third party certification of quality control........................................................................26 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directives (89/106/EEC).......................................................................................27 Annex ZB (informative) Clauses of this European Standard relevant to fulfil essential requirements or other provisions of EU-Directives..............................................................................................................31 Bibliography ..............................................................................................................................................................35
2
EN 13160-1:2003 (E)
Foreword
This document (EN 13160-1:2003) has been prepared by Technical Committee CEN /TC 221, "Shop fabricated metallic tanks and equipment for storage tanks and for service stations" the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2003, and conflicting national standards shall be withdrawn at the latest by February 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with the Construction Products Directive (89/106/EEC) see informative Annex ZA, which is an integral part of this document. For relationship with other EU Directives see informative Annex ZB. Annexes A, B, and D are informative. Annex C is normative. This document includes a Bibliography. This European Standard consists of 7 parts: Leak detection systems; Part 1:
General principles
Part 2:
Pressure and vacuum systems
Part 3:
Liquid systems for tanks
Part 4:
Liquid and/or vapour sensor systems for use in leakage containments or interstitial spaces
Part 5:
Tank gauge leak detection systems
Part 6:
Sensors in monitoring wells
Part 7:
General requirements and test methods for interstitial spaces, leak protecting linings and leak protecting jackets
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
1
Scope
This European Standard specifies the general principles for leak detection systems for use with double-skin tanks, single-skin tanks and pipework designed for water polluting fluids.
2
Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European 3
EN 13160-1:2003 (E)
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 13160-2:2003, Leak detection systems — Part 2: Pressure and vacuum systems. EN 13160-3:2003, Leak detection systems — Part 3: Liquid systems for tanks. EN 13160-4:2003, Leak detection systems — Part 4: Liquid and/or vapour sensor systems for use in leakage containments or interstitial spaces. prEN 13160-5:1998, Leak detection systems — Part 5 : Tank gauge leak detection systems. EN 13160-6:2003, Leak detection systems — Part 6 : Sensors in monitoring wells . EN 13160-7:2003, Leak detection systems — Part 7: General requirements and test methods for interstitial spaces, leak protecting linings and leak protecting jackets . EN 13352, Specification for the performance of automatic tank contents gauges. EN 13463-1:2001, Non-electrical equipment intended for use in potentially explosive atmospheres — Part 1: Basic method and requirements. EN 50014, Electrical apparatus for potentially explosive atmospheres – General requirements. EN 50015, Electrical apparatus for potentially explosive atmospheres – Oil immersion "o". EN 50016, Electrical apparatus for potentially explosive atmospheres – Pressurized apparatus "p". EN 50017, Electrical apparatus for potentially explosive atmospheres – Powder filling "q". EN 50018, Electrical apparatus for potentially explosive atmospheres – Flameproof enclosures "d". EN 50019, Electrical apparatus for potentially explosive atmospheres – Increased safety "e". EN 50020, Electrical apparatus for potentially explosive atmospheres – Intrinsic safety "i". EN 50028, Electrical apparatus for potentially explosive atmospheres – Encapsulation m . EN 50039, Electrical apparatus for potentially explosive atmospheres – Intrinsic safety “i” systems . EN 60073, Basic and safety principles for man-machine interface, marking and identification - Coding principles for indicators and actuators (IEC 60073:1996). EN 60335–1, Household and similar electrical appliances – Safety - — Part 1 : General requirements (IEC 60335- 1:2001, modified). EN 60529, Degrees of protection provided by enclosures (IP-code) (IEC 60529:1989). EN 60730–1, Automatic electrical controls for household and similar use — Part 1 : General requirements (IEC 60730-1:1999, modified). EN 61010–1, Safety requirements for electrical equipment for measurement, control and laboratory use — Part 1: General requirements (IEC 61010-1:2001). ISO 2859–1, Sampling procedures for inspection by attributes — Part 1 : Sampling schemes indexed by acceptance quality limit (AQL) for lot-by lot inspection.
3
Classes of leak detection systems
For the purpose of this standard the following classes apply in order of protection for the level of safety or environmental protection required: 4
EN 13160-1:2003 (E)
Class I:
Systems of this class will detect a leak above or below the liquid level in a double-skin system. They are inherently safe and will detect a leak before any liquid can enter the environment (i. e. pressure or vacuum systems).
Class II:
Systems of this class will detect a leak above or below the liquid level in a double-skin system with the possibility of the leak detection liquid leaking into the environment (i. e. liquid monitoring system).
Class III:
Systems of this class will detect a leak below the liquid level in a tank or in a pipework system. These systems are based on liquid and/or vapour sensors located in leakage containment or interstitial space. A possibility exists of product entering the environment.
Class IV:
Systems of this class will detect, to specific levels of probability, specified rates of change of tank contents (i. e. leakages into or out of the tank). A strong possibility exists that product will enter the environment in the event of a leak.
Class IV A:
Dynamic leak detection systems will by reconciliation also indicate leaks in the connected pipework
Class IV B:
Static tank gauge leak detection systems or statistical quiet period leak detection systems will only indicate leaks from a tank.
Class V:
Systems of this class may detect liquid loss in tanks or pipes below the liquid level. Product will enter the environment before the leak is detected (i. e. sensors in monitoring wells).
For examples for the different classes see annex A.
4
Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply. 4.1 atmospheric pressure conditions pressures ranging from 0,08 MPa (0,8 bar) to 0,11 MPa (1,1 bar) 4.2 leak detection system includes all equipment required to indicate a leak main components could include the interstitial space, leak protecting linings, leak protecting jacket, leak indicating device, leak detector, system pipework, leak detecting media, monitoring wells or sensors 4.3 interstitial space space between the walls of double-skin systems. It provides the passage for fluids which may enter the interstitial space 4.4 double-skin tank tank constructed with an inner and outer wall with an interstitial space where the maximum filling level of the tank does not exceed the height of the interstitial space 4.5 single-skin tank tank constructed with a single wall 4.6 leak protecting lining internal layer which solely or in conjunction with an intermediate material produces a suitable interstitial space 4.7 leak protecting jacket external layer which solely or in conjunction with an intermediate material produces a suitable interstitial space 5
EN 13160-1:2003 (E)
4.8 intermediate layer material used to separate the inner and outer tank walls, the intermediate layer may or may not be attached to either one or both walls, it provides separation of the inner and outer walls 4.9 double-skin pipework pipework constructed with an inner and outer wall with an interstitial space 4.10 single-skin pipework pipework constructed with a single wall 4.11 vacuum leak detector a leak detector for vacuum detects a leak using air as the leak detection medium, with vacuum leak detectors an alarm is triggered by rise of pressure in the interstitial space in the event of a leak 4.12 pressure leak detector a leak detector for pressure detects a leak using air or inert gas as the leak detection medium. With pressure leak detectors, in the event of a leak, an alarm is triggered by a drop in the pressure within the interstitial space 4.13 leak detector for liquid systems indicates a leak using liquid as a leak detection medium, any leak in either of the system walls is indicated by a drop of the leak detection fluid level 4.14 liquid sensor device which will detect liquid 4.15 vapour sensor device which will detect gas and vapour 4.16 leak indicating device indicates the operational and the alarm status of any connected sensors or leak detectors 4.17 tank gauge leak detection system a tank gauge system measures the volume of liquid stored in a tank, a loss can be indicated where the volume of liquid drawn from the tanks is monitored independently from the gauge and reconciled with changes in the stored volume, a loss can also be indicated by analysis of the changes in "static" liquid volume during periods when no additions to, or depletions, from the tank are taking place 4.17.1 static leak detection where a tank integrity test is carried out by the gauge whilst no additions to or depletions from the tank contents are being made 4.17.2 dynamic leak or loss detection where the tank contents gauge forms part of an integrated detection system and is used to detect a leak or loss during normal operation where additions to or depletion from the tank contents may be made, a loss can be detected in tanks and pipeworks, connected with the tank, which may indicate a leak
6
EN 13160-1:2003 (E)
4.17.3 statistical quiet period leak detection where the gauge system collects data during intervals (which are shorter than required for static leak detection) between dispensing and delivery operations, the data are then analyzed to determine if a loss has occurred, which may indicate a leak 4.17.4 tank integrity test test which is capable of detecting a leakage rate in accordance with a given test procedure, the test takes into account the thermal expansion of the liquid being stored, evaporative losses and the effects of any other variables including groundwater level 4.18 monitoring wells wells installed into the ground around a storage system, positioned to ensure that any liquid or vapour from a leakage from the system will reach one of them the monitoring well is used to ensure that the leakage can be detected visually or by sensors 4.19 leakage containment system, which is designed to prevent leakage from a primary system entering the environment and which enables the detection of leakage 4.20 frost protected area area where the temperature will not go below 0 C 4.21 stop valve valve used to prevent the passage of liquid beyond a fixed point in a connecting line 4.22 sensor system arrangement whereby liquid and/or vapour sensors are used in leakage containments or interstitial spaces and are monitored by a leak indicating device for the purpose of detecting leaks
5
Requirements
5.1 General Leak detection systems shall trigger the alarm in the event of a leak or in the event of malfunctions of the leak detection system. All leak detection systems shall indicate every leak by a visual and audible alarm. In the event of a power interruption, the leak detection system shall be designed to resume normal operation on the restoration of the power supply. Leak detection systems shall be designed for operation under atmospheric conditions according to 4.1. The components of a leak detection system intended for installation in the open air shall be suitable to operate in a temperature range of -20 C to +60 C or –40 °C to +40 °C. Components of a leak detection system intended for installation in frost-protected area shall be suitable to operate in a temperature range of -5 C to +50 C. Components of a leak detection system intended for installation in underground tanks shall be suitable to operate in a temperature range of -5 C to +30 C.
7
EN 13160-1:2003 (E)
Leak detection systems and/or their components intended for installation in a potentially explosive atmosphere shall be explosion protected. If there exists the possibility of an explosive atmosphere being present within the leak detection system and/or its components these shall be explosion protected. The leak detection systems shall be designed for installation in such a way to prevent accidental disconnection of the equipment's power supply. Plug and socket connections or switches are only permitted if their interruption triggers off an alarm. The leak detection system shall be capable of being tested or capable of simulating a leak condition. Disconnections of any sensor or transducer or a short circuit in connecting cables shall result in an alarm condition. All indications and sounders shall be capable of being tested. The leak detection systems shall be designed so that correct operation can be verified. The leak detection systems shall be used and maintained in accordance with the manufacturer's instruction. If a leak detector serves more than one tank or pipework equipment is required which shows or allows to test in an event of an alarm which tank or pipework leaks.
5.2 Avoidance or reduction of ignition sources 5.2.1
General requirements
All electrical and non-electrical equipment and components, intended for use in potentially explosive atmospheres, shall be designed and constructed according to good engineering practice and in conformity with the required categories for group II equipment to ensure avoidance of any ignition source. To classify the category of the equipment it shall be subjected to an ignition hazard assessment in accordance with 5.2 of EN 13463-1:2001. The suitable category for the explosion protected equipment parts, for use in certain areas of the leak detection systems, are detailed in annex B. 5.2.2 5.2.2.1
Electrical equipment for leak detection systems General
Any electrical equipment, which is intended for use in or which may be exposed to potentially explosive atmospheres, shall comply with the requirements according to EN 50014 to EN 50020, EN 50028 or EN 50039 as appropriate, or any other means of protection. All electrical equipment shall comply with the requirements according to EN 60073, EN 60335-1, EN 60730-1 and EN 61010-1 and shall fulfil minimum IP 30 according to EN 60529. The electrical equipment shall be protected from any external influences such that it will withstand the temperature, chemical and mechanical impact that are to be expected on site. 5.2.2.2
Inspection of the electrical equipment
Electrical equipment shall be inspected visually to confirm that it is constructed in accordance with the electrical diagrams and certificates of conformity provided by the manufacturer. 5.2.3
Non electrical equipment for leak detection systems
Non electrical equipment, intended for use in potentially explosive atmospheres, shall comply with the requirements of EN 13463-1 and, where relevant, the European standard for the specific type of ignition protection selected. Non electrical equipment shall be protected from any external influence such that it will withstand the temperature, chemical and mechanical impact that are to be expected on site. 5.3 Leak indicating device The operating condition shall be clearly indicated, i. e. by a "green" light.
8
EN 13160-1:2003 (E)
The visual alarm shall be clearly indicated, i. e. by a "red" light. It shall be impossible to switch off the visual alarm while the system is powered on and an alarm condition exists. The audible alarm shall be suitable for continuous operation and shall be designed for muting. All leak indicating devices shall be designed for connecting an additional alarm. The output parameter shall be stated. All indicators shall be equipped with a device for testing the operating condition of the alarm. 5.4 Function test of the audible alarm transmitter 5.4.1
Test objective
The test objective is to ensure that the alarm is loud enough to be heard and that the volume level is maintained for a minimum period of 36 h. 5.4.2
Preparation
For the purpose of this test the leak detector with the signal device shall be mounted with the fastening device supplied by the manufacturer to a solid and reverberant wall. A wall is considered solid if a section of the wall 2 having a surface area of 1 m weighs at least 200 kg and reverberant if it has an absorption coefficient for sound of s 0,05. 5.4.3
Evaluation
The test will be deemed to have been passed if the measured value for the continuous sound level is after the fatigue test. 5.4.4
70
dB (A)
Test method
The audible signal device shall be sounded continuously for at least 36 h in a fatigue test. On completion of the fatigue test the sound level shall be measured by a continuous signal. The arithmetic mean shall be taken from at least three measuring points. These measuring points shall be located approximately equidistant on a hemisphere extending over the leak detector front. The radius of the hemisphere shall be r = 1 m. The outer measuring points are to be chosen such that the radius describes an angle of 45 ° referred to the leak detector or indicator front at these points. 5.5 Device categories for explosion-proof parts of the leak detection system See annex B. 5.6 Inspection of equipment The user shall ensure before use of the equipment that,
the electrical equipment and the system shall be suitable for its application in a hazardous area and
the equipment has been installed in accordance with the manufacturer's instructions.
5.7 Instruction All leak detection systems shall be accompanied by instruction as to:
safe installation, use and maintenance;
9
EN 13160-1:2003 (E)
assessment of safe operation condition and possible misuse;
limitation of equipment, e.g. temperature, pressure regulation;
essential characteristic of tools used;
training needed for safe use of equipment.
The standards for which the system has been tested e. g. for electromagnetic compatibility (EMC) compliance or low voltage directive.
6
Marking
The following information shall be marked on the product:
Manufacturer;
Year of production;
Identification number;
Class number and EN – number;
Temperature range;
Identification symbol or number of the certified body, if relevant
Where ZA.3 covers the same information as this clause, requirements of this clause are met.
7
System of evaluation of conformity
According to annex C.
10
EN 13160-1:2003 (E)
Annex A (informative) Examples of leak detection systems
A.1
Leak detection systems – class I
Key 1 Pressure line 2 Measuring line 3 Leak detector 4 Measuring device for pressure 5 Alarm (visual and audible) Figure A.1 — Pressure systems with integrated pressure generator for tanks
Key 1 Stop valve 2 Suction line 3 Leak detector 4 Measuring device for pressure 5 Alarm (visual and audible) 6 Measuring line 7 Exhausting line Figure A.2 — Vacuum systems with integrated vacuum generator for tanks 11
EN 13160-1:2003 (E)
Key 1 Measuring device for pressure 2 Leak detector 3 Alarm (visual and audible) 4 Test valve
Figure A.3 — Vacuum systems without integrated vacuum generator for tanks
Key 1 Test coupling 2 Pressure leak detector 3 Alarm (visual and audible) 4 Pressure reducer 5 Nitrogen bottle 6 Test valve 7 Double-skin pipework 8 Pressure line
Figure A.4 — Pressure system with integrated pressure generator
12
EN 13160-1:2003 (E)
Key 1 Test coupling 2 Pressure leak detector 3 Alarm (visual and audible) 4 Pressure reducer 5 Nitrogen bottle (remove after first filling) 6 Test valve 7 Double-skin pipework 8 Pressure line Figure A.5 — Pressure system without integrated pressure generator for pipework
Key 1 Stop valve 2 Vacuum leak detector 3 Alarm (visual and audible) 4 Three way valve 5 Exhausting line 6 Measuring line 7 Test valve 8 Double-skin pipework 9 Suction line
Figure A.6 — Vacuum system with integrated vacuum generator for pipework 13
EN 13160-1:2003 (E)
A.2
Leak detection systems – class II
Key 1 Leak detection liquid tank 2 Liquid sensor 3 Leak indicating device 4 Alarm (visual and audible) 5 Test valve 6 Interstitial space with leak detection liquid
Figure A.7 — Liquid system for tanks or pipes (shown is a tank)
A.3
Leak detection systems – class III
Key 1 Leak indicating device 2 Alarm (visual and audible) 3 Sensor
Figure A.8 — Liquid and vapour sensor system for use in an interstitial space 14
EN 13160-1:2003 (E)
Key 1 Filling line 2 Protecting pipe 3 Leak indicating device 4 Alarm (visual and audible) 5 Leakage containment 6 Sensor
Figure A.9 — Liquid and vapour sensor system for use in a leakage containment
A.4
Leak detection systems – class IV
Key 1 Indicator for dispensed volume 2 Data line 3 Tank gauge processor 4 Alarm (visual and audible) 5 Tank gauge
Figure A.10 — Tank gauge leak detection system – Category A 15
EN 13160-1:2003 (E)
Key 1 Indicator for dispensed volume 2 Data line 3 Tank gauge processor 4 Alarm (visual and audible) 5 Tank gauge
Figure A.11 — Tank gauge leak detection system – Category B
A.5
Leak detection system – class V
Key 1 Leak indicating device 2 Alarm (visual and audible) 3 Monitoring well 4 Sensor
Figure A.12 — Sensors in monitoring wells 16
EN 13160-1:2003 (E)
Annex B (informative) Equipment categories for explosion-proof parts of the leak detection systems
Leak detection systems or their components can be installed in different hazardous areas (zones) or also in nonhazardous areas. EN 1127-1 specifies methods for the identification of hazardous situations leading to explosion and the design and construction measures appropriate for the required safety. The definition of zones and categories and the relation between categories and zones are detailed in this standard. It is the responsibility of the user to choose the suitable category of the equipment for installation in a particular zone. If the stored product is a liquid with a flash point below 55 C, equipment installed in certain locations will conform to one of the categories of equipment defined in EN 1127-1. Table B.1 shows the equipment categories which typically will be used in certain areas of the system. However, these categories can be varied where prevailing regulations or other constraints apply. NOTE 1
For equipment outside the interstitial space reduced requirements could apply, see Table B.1.
NOTE 2 If the interstitial space and/or components of the leak detection system are not chemically resistant to any liquids with which they can come into contact, there can be a risk of the generation of an explosive atmosphere.
Regardless of these proposals the requirements arising from the potentially explosive atmospheres at the place of installation should apply. Table B.1 — Equipment categories Definition of system areas
Equipment category
Inner part of the tank
1
Monitoring well
2
Interstitial space
inner wall with permeation by the stored product
monitoring medium air monitoring with secured medium recharging facility inert gas
inner wall without permeation by the stored product
monitoring medium air
monitoring medium inert gas
without secured recharging facility vacuum
1 no requirements 2 or 3 1 or 2
pressure without secured recharging facility
2
Pressure with secured recharging facility
3
with secured recharging facility without secured recharging facility
no requirements no requirements
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EN 13160-1:2003 (E)
Annex C (normative) Evaluation of conformity
C.1
General
This annex specifies procedures and requirements for the evaluation of conformity for leak detection systems. The purpose is the evaluation of conformity of the leak detection systems on the basis of
initial type-testing of the product
factory production control.
Initial type testing shall be performed on first application of this standard. Tests previously performed in accordance with the provisions of this standard (same product, same characteristic(s), test method, sampling procedure, system of attestation of conformity, etc.) may be taken into account. In addition, initial type testing shall be performed at the beginning of the production of a new leak detection systems or at the beginning of a new method of production (where this may affect the stated properties). C.2 C.2.1
Initial type-testing of the product All classes (EN 13160–1:2003)
Designation of the type test
Clause
Page
---------------------------------------------------------------------------------------------------Inspection of the electrical equipment
5.2.2
8
Inspection of the leak indicating device
5.3
8
Function test of the audible alarm transmitter
5.4
9
Inspection of equipment
5.6
9
Inspection of marking
6
10
Clause
Page
C.2.2
Class I (EN 13160–2:2003)
Pressure and vacuum leak detectors Designation of the type test
--------------------------------------------------------------------------------------------------Pressure limit switch test
8.1.3
9
Test of the reliability
8.1.4
12
Pressure test
8.1.6
16
18
EN 13160-1:2003 (E)
Additional for vacuum leak detectors Designation of the type test
Clause
Page
--------------------------------------------------------------------------------------------------Function test of the alarm
8.1.5
14
Test of the stop valve
8.2
16
Test of the condensate trap
8.3
18
Clause
Page
Additional for pressure leak detectors Designation of the type test
--------------------------------------------------------------------------------------------------Test of the pressure relief valve C.2.3
Annex A
19
Clause
Page
Class II (EN 13160–3:2003)
Leak detector Designation of the type test
--------------------------------------------------------------------------------------------------Test of the components
7.1
7
Function test
7.3
7
Clause
Page
Leak detection liquid Designation of the type test
--------------------------------------------------------------------------------------------------Determination of the freezing point and the viscosity
7.4.4
9
of thermal expansion
7.4.5
9
Determination of the flash point
7.4.6
9
Determination of the fungicidal properties
7.4.7
9
Determination of the segregation
7.4.8
9
7.4.9
10
7.4.10
10
Determination of the coefficient
Determination of the compatibility with metallic materials Tests for harmful effects on contact with groundwater
19
EN 13160-1:2003 (E)
C.2.4
Class III (EN 13160–4:2003)
Liquid sensors Designation of the type test
Clause
Page
---------------------------------------------------------------------------------------------------Suitability test (response- and recovery time)
10
5
Clause
Page
Discriminating liquid sensors Designation of the type test
--------------------------------------------------------------------------------------------------Suitability test (response- and recovery time)
11
8
Clause
Page
Vapour sensors Designation of the type test
--------------------------------------------------------------------------------------------------Suitability test (lower limit of detection with response- and recovery time)
12
14
Clause
Page
Submerged vapour sensors Designation of the type test
---------------------------------------------------------------------------------------------------Suitability test (response- and recovery time) C.2.5
13
19
Clause
Page
Class IV (prEN 13160–5:1998)
Category A and category B(1) Designation of the type test
--------------------------------------------------------------------------------------------------File sorting and selection
9.3.1
6
Simulated tank leaks (constant)
9.3.2
8
Simulated tank leaks (variable)
9.3.3
8
(suction and pressurised draw-off)
9.3.4
9
Induced leak rates – quantitative systems
9.3.5
10
Induced leak rates – qualitative systems
9.3.6
10
Test sequence
9.3.7
10
Test results analysis and report
9.4
11
Statistical analysis
9.5
12
Simulated pipe leaks
20
EN 13160-1:2003 (E)
Category B(2) Designation of the type test
Clause
Page
---------------------------------------------------------------------------------------------------Stabilisation and trial run
10.4.2
19
Test procedure
10.4.3
19
Test results
10.5
23
Statistical analysis
10.6
23
C.2.6
Class V (EN 13160–6:2003)
Discriminating liquid sensors according to C.2.4 Vapour sensors according to C.2.4 Submerged vapour sensors according to C.2.4 C.2.7
Interstitial spaces, leak protecting linings and leak protecting jackets (EN 13160–7:2003)
Interstitial space Designation of the type test
Clause
Page
--------------------------------------------------------------------------------------------------Proof of the tightness and the strength of the interstitial space
5.4
6
Test of the free passage of liquid
5.5
6
Test of the free passage of air
5.6
7
Flow rate test of the intermediate layer
5.7
7
Determination of the flow resistance
5.8
9
5.9
12
Clause
Page
Determination of the interstitial space volume for class I-systems Additional for flexible leak protecting linings Designation of the type test
--------------------------------------------------------------------------------------------------Test of material
6.3.5.2
18
6.3.5.3
18
Clause
Page
Test of impact for the guard plate or the lining itself, if it is used without a guard plate Additional for GRP-rigid leak protecting linings Designation of the type test
-------------------------------------------------------------------------------------------------Test of material
6.4.5
22 21
EN 13160-1:2003 (E)
Additional for leak protecting jackets Designation of the type test
Clause
Page
--------------------------------------------------------------------------------------------------Test of material
7.4.1
24
Jacket impact type test
7.4.2
24
C.3
Factory production control
C.3.1
General
The factory production control should guarantee a constant quality of the leak detection devices as part of a safety device. The following points shall be considered:
The manufacturer shall establish and maintain a quality system for the factory production control.
Carrying out of a routine check test of leak detectors, leak protecting linings, leak protecting jackets and interstitial spaces according to C.3.2.
Documentation of the results of the routine check test shall refer to the serial number of the leak detector. The documentation shall be kept at least five years.
A factory production control system conforming with the requirements or the relevant part(s) of EN ISO 9001, and made specific to the requirements of this standard, is considered to satisfy this requirement. In the event of any non-conformity of any product, that product shall be placed into quarantine and action taken to rectify the cause of the non-conformity. Products may not subsequently be despatched until the problem has been resolved. C.3.2
Requirements of the factory production control
C.3.2.1 All classes (EN 13160–1:2003) Test of the proper electrical function; Visual test of the alarm and operational lamp.
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EN 13160-1:2003 (E)
C.3.2.2
Class I (EN 13160–2:2003)
Pressure and vacuum leak detectors Pressure limit switch test (including test of the pressure relief valve for pressure leak detectors) according to 8.1.3 of EN 13160–2:2003, but only at (20 ± 5) C. Test of the tightness of the leak detector at operating pressure and with the intended leak detection media, at which the following condition shall be fulfilled, see Equations (C.1) and (C.2): 1
0,05
QLM =
QLO =
( PPA P1 ) V
t
( PPA P1 ) V
t
(C.1)
(C.2)
where: Q LM is the allowable leak rate with integrated pressure generator, in Pascal litre per second Q LO is the allowable leak rate without integrated pressure generator, in Pascal litre per second p PA is the operating pressure of the leak detector, in Pascal p 1
is the pressure value, p PA, in Pascal
V is the volume of the leak detector including the connected test volume at the moment of the test (interconnecting lines, measuring instruments), in litre t
is the test time, in seconds
For the determination of the handicaps for the test of the tightness the manufacturer shall give either the pressure value p 1 or the test time t. NOTE If the pressure value p 1 is given the equation above provides the test time t at which the pressure may drop to the value p 1. If the test time t is given the equation above provides the pressure value p 1, which is the lowest value to which the operating pressure p PA may drop during the test time.
Test of the volume flow at the alarm setting according to 8.1.3 of EN 13160–2:2003 with an acceptable quality level (AQL) of 4,0 according to ISO 2859-1 on the basis of the inspection level II. Interstitial space, excluding the interstitial space of leak protecting jackets (EN 13160–7) Proof of the tightness and the strength; Test of the free passage of air. Interstitial space for leak protecting jackets (EN 13160–7) Test of the free passage of air; Proof tightness and the strength according to the following method: After completion of the installation of the jacket the interstitial space shall be subjected to a pressure hold test of 20 kPa during 30 min. The welds shall be checked for eventual leaks with a soap solution. After successful completion of the pressure hold test a vacuum of -40 kPa shall be established. The vacuum shall never drop below -13,5 kPa. 23
EN 13160-1:2003 (E)
Flexible leak protecting linings (EN 13160–7) Weld seam testing by means of tensile test. Leak protecting jackets (EN 13160–7) Jacket impact test. C.3.2.3 Class II (EN 13160-3:2003) Leak detector (EN 13160–3) Function test according to 7.3.1 to 7.3.3 of EN 13160–3:2003. Leak detection liquid (EN 13160–3) Determination of the density. Interstitial space (EN 13160–7) Determination of the interstitial space volume; Proof of the tightness and the strength; Test of the free passage of liquid. C.3.2.4 Class III and class V (EN 13160-4:2003 and EN 13160-6:2003) A sample from production shall be fully tested in accordance with the appropriate test methods as follows: Liquid Sensors: type test according to EN 13160–4:2003, clause 10; Discriminating Liquid Sensors: type test according to EN 13160–4:2003, clause 11; Vapour Sensors: type test according to EN 13160–4:2003, clause 12; Submerged vapour sensors: type test according to EN 13160–4:2003, clause 13. The above tests shall be repeated whenever there is a change in design or production method, which may have an effect on any performance requirement. In order to verify the correct functioning of each sensor produced, subsequent to the initial type testing, manufacturers shall have in place a routine production test procedure, which shall include at least the following:
identification of the product tested,
the test methods applied,
the test and inspection results,
the date of testing,
calibration records.
C.3.2.5
Class IV (prEN 13160-5)
General The products in this case incorporate software, presumed to be shipped on magnetic disk, optical disk, or preprogrammed solid-state devices. Every such product produced shall be copied from a controlled master file (on magnetic disk, optical disk or solid-state device(s)), and each copy produced shall be verified either against a 24
EN 13160-1:2003 (E)
second independent copy of the controlled master file or against a known checksum or by a functional test of the product. Category A Dynamic leak detection and Category B(1) Statistical quiet period leak detection The products in this case consist solely of software, to be produced in accordance with the general requirement above. Category B(2) Static tank gauge leak detection The product in this case consists of an automatic tank contents gauge (ATCG) and accompanying software. The ATCG shall be manufactured in accordance with EN 13352. The software component shall be produced in accordance with the general requirements above. ATCG leak indicating device according to EN 13352.
25
EN 13160-1:2003 (E)
Annex D (informative) Third party certification of quality control
Where required, there can be third party certification of the quality control system and/or of the product itself. For the former, the factory production control system defined in C.3 should be subjected to third party certification, while in the latter, the factory production control defined in C.3 and the initial type testing defined in C.2 should be subjected to third party certification by a product certification.
26
EN 13160-1:2003 (E)
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directives (89/106/EEC)
ZA.1 Scope and relevant clauses This European Standard has been prepared under the Mandate M/131 “Pipes, tanks and ancillaries not in contact with water intended for human consuption" given to CEN by the European Commission and the European Free Trade Association. The clauses of this European Standard shown in this annex meet the requirements of the Mandate given under the EU Construction Products Directive (CPD) (89/106/EEC) Compliance with these clauses confers the presumption of fitness of the construction products covered by this European Standard for their intended use. WARNING — Other requirements and EU directives, not affecting the fitness for intended use may be applicable to a construction product falling within the scope of this standard. NOTE 1 In addition to any specific clauses relating to dangerous substances contained in this Standard, there may be other requirements applicable to the products falling within its scope (e. g. transposed European legislation and national laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Products Directive, these requirements need also to be complied with, when and where they apply. NOTE 2 An informative database of European and national provisions on dangerous substances is available at the Construction web site on EUROPA (CREATE, accessed through http://europa.eu.int). This annex establishes the conditions for the CE marking of leak detection systems intended for the uses indicated below and the relevant clauses applicable. This annex ZA has the same scope as Clause 1 of this standard. Construction product:
Product for use in leak detection systems
Intended use(s): Leak detection in double and single skin tanks and pipework designed for water polluting fluids used for heating, cooling and transportation (fuel).
27
EN 13160-1:2003 (E)
Table ZA 1 — Relevant clauses Essential characteristics
Requirement clauses in this or other standards
Levels or classes
Effectiveness of leakage alarm Clause 5 (excluding 5.1 last indent and 5.7) system Where relevanta , EN 13160-7:2003 Clauses 6 (excluding 6.3.6 and 6.4.7) and 7.2 rd
th
th
Durability of effectiveness against EN 13160-1:2003, 5.1, 3 , 4 and 5 indents temperature, chemical attack and EN 13160-2:2003b , 8.1.4 fatigue and cycling st
th
th
th
EN 13160-3:2003c 6.2, 1 indent, 4 , 7 and 8 bullet , 7.3.4, 7.3.5 ,7.4.5 EN
13160-4:2003d
nd
, 10.2 2 para.
prEN 13160-5e , nd
EN 13160-6:2003f , 6 and 7, 2 indent a
nd
where relevant , EN 13160-7:2003, 6.1, 2 para., Tables 1.4, relevant requirements a
applies to leak protecting linings and leak protecting jackets when sold separately
b
Class I systems
c
Class II systems
d
Class II systems
e
Class IV systems
f
Class V systems
ZA.2 Procedure for the attestation of conformity of products for leak detection systems ZA.2.1 System of attestation of conformity Products for leak detection systems for the intended use listed shall follow the system of attestation of conformity shown in Table ZA.2, which is in accordance with the Decision of the Commission (1999/472/EC) of 1 July 1999. Table ZA 2 — Attestation of conformity systems Product
Intended use
Products for leak
In installations for the transport/distribution/storage of gas/fuel intended for the supply of building heating/cooling systems
detection systems
In installations for the transport/disposal/storage of water not intended for human consumption
Level(s) or class(es)
Attestation of conformity systems
—
3
—
4
System 3: See Directive 89/106/EEC (CPD), Annex III.2.(ii), Second possibility System 4: See Directive 89/106/EEC (CPD), Annex III.2.(ii), Third possibility
The tasks to be assigned to the manufacturer and the notified test laboratory are shown in Tables ZA.3 and ZA.4. For products having more than one intended use as specified in Table ZA.2, Tables ZA.3 and ZA.4 shall be read cumulatively.
28
EN 13160-1:2003 (E)
Table ZA.3 — Assignment of evaluation of conformity tasks under system 3 for products for leak detection systems used for storage of gas/fuel Tasks
Content of task
Evaluation of conformity clauses to apply
Parameters related to all characteristics of Table ZA.1
C.3
Initial type testing
—
—
Initial type testing
All characteristic of Table ZA.1
C.2
Factory production control Tasks for the manufacturer Tasks for the notified body
Table ZA.4 — Assignment of evaluation of conformity tasks under system 4 for products for leak detection systems used for storage of water not intended for human consumption Tasks
Content of task
Evaluation of conformity clauses to apply
Factory production control
Parameters related to all characteristics of Table ZA.1
C.3
Initial type testing
All characteristic of Table ZA.1
C.2
Tasks for the manufacturer
ZA.2.2 EC Declaration of conformity When compliance with the conditions of this annex is achieved, the manufacturer or his agent established in the EEA shall prepare and retain a declaration of conformity (EC Declaration of conformity), which authorises the affixing of the CE marking. This declaration shall include:
name and address of the manufacturer, or his authorised representative established in the EEA, and place of production;
description of the product (type; identification, use...) and a copy of the information accompanying the CE marking;
provisions to which the product conforms (e. g. annex ZA of this EN);
particular conditions applicable to the use of the product, (e. g. provisions for use under certain conditions, etc.);
name and address of the notified laboratory(ies) (only for products under system 3);
name of, and position held by, the person empowered to sign the declaration on behalf of the manufacturer or his authorised representative.
The above mentioned declaration shall be presented, if requested, in the official language or languages of the Member State in which the product is to be used. ZA.3 CE marking The CE symbol shall appear on the product. The CE symbol and the following information shall appear on the packaging and/or on the accompanying commercial documents:
the name or identifying mark and registered address of the producer/supplier, and
the last two digits of the year in which the marking was affixed, and
the number of this standard (EN 13160), and
the product type (e. g. product for leak detection systems), and 29
EN 13160-1:2003 (E)
the type (class I, II, III, IV or V), and
where relevant, the material and dimensions of the liner or protecting jacket, and
where relevant, the category (A, B(1) or B(2)), and
instructions (see relevant indent of 5.7),
where relevant, the operation (pressure or vacuum, liquid and/or vapour sensor), and
effectiveness of leakage alarm system
the fluids to be detected, and
where relevant, limitations on temperature and/or pressure, and
where relevant, the interstitial space volume,
where relevant, the response and recovery time of the sensor.
Figure ZA.1 and Figure ZA.2 give an example of the information to be given on the packaging and/or on the accompanying commercial documents.
Figure ZA.1 — Example CE marking information for pressure system CE AnyCo Ltd, P.O. Box 21, B1050 00 EN 13160 Products for leak detection systems Class I pressure system Heating oil Temperature range –40 °C to +60 °C
Figure ZA.2 — Example CE marking information for vacuum system CE AnyCo Ltd, P.O. Box 21, B1050 00 EN 13160 Products for leak detection systems Class I vacuum system Liner – GRP Heating oil Temperature range –40 °C to +60 °C
In addition to any specific information relating to dangerous substances shown above, the product should also be accompanied, when and where required and in the appropriate form, by documentation listing any other legislation on dangerous substances for which compliance is claimed, together with any information required by that legislation. Note : European legislation without national derogations need not be mentioned . 30
EN 13160-1:2003 (E)
Annex ZB (informative) Clauses of this European Standard relevant to fulfil essential requirements or other provisions of EU-Directives
WARNING — Other requirements and other EU-Directives may be applicable to the product(s) falling within the scope of this standard. The following Directives are concerned:
Directive 94/9/EC Equipment and protective systems for use in potentially explosive atmospheres,
Directive 73/23 EEC Electrical equipment designed for use with certain voltage limits.
Compliance with this standard provides one means of conforming with the specific essential requirements of the Directive concerned and associated EFTA regulations. Table ZB.1 — Essential Requirements of Directive 94/9/EC Equipment and protective systems intended for use in potentially explosive atmospheres – Annex II Clause
Description (paraphrased)
Applicable (Yes/No)?
Addressed by clause of this standard or other standards
1
Common Requirements
-
-
1.0
General requirements
-
-
1.0.1
Principles of integrated explosion safety
YES
Part 1; 5.2
–
Prevent formation of explosive atmospheres
NO
-
–
Prevent ignition of explosive atmospheres
YES
Part 1; 5.2
–
Limit range of explosion flames and pressures
NO
-
1.0.2
Design after due analysis of possible operating faults
YES
Part 1; 5.2
1.0.3
Special checking and maintenance conditions
NO
-
1.0.4
Design to cope with surrounding area conditions
YES
Part 1; 5.1, 5.2
1.0.5
Marking
YES
Part 1; 6
1.0.6
Instructions
-
-
(a)
All equipment must be accompanied by instructions
YES
Part 1; 5.7
–
Recapitulation of marking information
YES
Part 1; 5.7
–
Instructions for safe installation, use, maintenance
YES
Part 1; 5.7
–
Indication of danger areas by pressure relief devices
YES
Part 1; 5.7
–
Training instructions
YES
Part 1; 5.7
–
Assessment of safe operation in expected conditions
YES
Part 1; 5.7
–
Electrical, pressure, temperature parameter limits
YES
Part 1; 5.7
–
Special conditions of use and possible misuse
YES
Part 1; 5.7
–
Essential characteristics of tools which may be fitted
NO
-
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EN 13160-1:2003 (E)
Table ZB.1(continued) Clause
Description (paraphrased)
Applicable (Yes/No)?
Addressed by clause of this standard or other standards
(b)
Instructions – translation into Community languages
YES
Part 1; 5.7
(c)
Instructions – diagrams necessary for correct use, etc
YES
Part 1; 5.7
(d)
Literature must not contradict instructions for safety
NO
-
1.1
Selection of materials
-
-
1.1.1
Materials must not trigger off an explosion
NO
-
1.1.2
No reaction of materials and explosive atmosphere
NO
-
1.1.3
No reduction in protection due to corrosion, wear, etc
YES
Part 1; 5.2
1.2
Design and construction
-
-
1.2.1
Technological knowledge of explosion protection
YES
Part 1; 5.2
1.2.2
Replacement components to function safely
NO
-
1.2.3
Enclosed structures and prevention of leaks
YES
Part 2; 7.1
1.2.4
Dust deposits
NO
-
1.2.5
Additional means of protection
YES
Part 1; 5.1
1.2.6
Safe opening
NO
-
1.2.7
Protection against other hazards
NO
-
1.2.8
Overloading of equipment
NO
-
1.2.9
Flameproof enclosure systems
YES
Part 1; 5.2
1.3
Potential ignition sources
-
-
1.3.1
Hazards arising from different ignition sources
YES
Part 1; 5.2
1.3.2
Hazards arising from static electricity
YES
Part 1; 5.5, Part 3; 6.1, 6.4 Part 7; 6.1
1.3.3
Hazards arising from stray electric and leakage current
NO
-
1.3.4
Hazards arising from overheating
NO
-
1.3.5
Hazards arising from pressure compensations
NO
-
1.4
Hazards arising from external effects
-
-
1.4.1
Safety in presence of voltages, humidity, vibration etc
NO
-
1.4.2
Mechanical and thermal stress, aggressive substances
YES
Part 7; 6 and 7
1.5
Requirements in respect of safety-related devices
-
-
1.5.1
Detection of failure of safety devices – fail safe
YES
Part 1; 5.1
1.5.2
System security in the event of safety device failure
NO
-
1.5.3
Emergency stop control lockout devices
NO
-
1.5.4
Control and display units
YES
Part 1; 5.3, 5.4
1.5.5
Explosion protection devices (measuring functions)
NO
-
1.5.6
Serviceability of devices with a measuring function
NO
-
1.5.7
Safety factor of devices with a measuring function
NO
-
1.5.8
Risks arising from software
YES
Part 5; 9, 10 and Annex A
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EN 13160-1:2003 (E)
Table ZB.1 (concluded) Clause
Description (paraphrased)
Applicable (Yes/No)?
1.6
Integration of safety requirements relating to system
Addressed by clause of this standard or other standards
NO
-
-
-
2
Supplementary requirements of equipment
-
-
2.0
Requirements for category M of equipment group I
NO
-
2.1
Requirements for category 1 of equipment group II
-
-
2.1.1
Explosive atmospheres due to gases, vapours, hazes
-
-
2.1.1.1
No sources of ignition even in event of rare incidents
-
-
–
either an independent second means of protection or
YES
Part 1; 5.2
–
protection ensured in event of 2 independent faults
YES
Part 1; 5.2
2.1.1.2
temperature limit on surfaces can never be exceeded
NO
-
2.1.1.3
Opening of parts having possible sources of ignition
NO
-
2.1.2
Explosive atmospheres caused by air/dust mixtures
NO
-
2.2
Requirements for category 2 of equipment group II
-
-
2.2.1
Explosive atmospheres due to gases, vapours, mists
-
-
2.2.1.1
No sources of ignition in event of operating faults
YES
Part 1; 5.2
2.2.1.2
Stated surface temperatures are not exceeded
YES
Part 1; 5.2
2.2.1.3
Opening of parts having possible sources of ignition
NO
-
2.2.2
Explosive atmospheres caused by air/dust mixtures
NO
-
2.3
Requirements for category 3 of equipment group II
-
-
2.3.1
Explosive atmospheres due to gases, vapours, mists
-
-
2.3.1.1
No sources of ignition during normal operation
YES
Part 1; 5.2
2.3.1.2
Surface temperatures limited in normal conditions
YES
Part 1; 5.2
2.3.2
Explosive atmospheres caused by air/dust mixtures
NO
-
-
-
NO
-
3
Supplementary requirements in respect of protective systems
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EN 13160-1:2003 (E)
Table ZB.2 — Essential Requirements of Directive 73/23/EEC – Electrical equipment designed for use within certain voltage limits – Annex I Clause
Description (paraphrased)
Applicable (Yes/No)?
Addressed standard
1
General conditions
-
-
(a)
Marking of characteristics essential for safe use
YES
6
(b)
Marking of manufacturer's name or trade mark
YES
6
(c)
Equipment made for safe assembly and connection
YES
5.2.
(d)
Equipment to provide protection from hazards below
YES
5.1, 5.2.
-
-
-
2
Hazards arising from the electrical equipment
NO
-
(a)
Physical injury or harm caused by electrical contact
NO
-
(b)
No dangerous temperatures, arcs or radiations
NO
-
(c)
Non-electrical dangers revealed by experience
NO
-
(d)
Insulation must be suitable for foreseeable conditions
NO
-
-
-
-
3
Hazards caused by external influences on equipment
NO
-
(a)
Equipment meets expected mechanical requirements
NO
-
(b)
Equipment is resistant to non-mechanical influences
NO
-
(c)
No dangers in foreseeable conditions of overload
NO
-
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by
clause
of
this
EN 13160-1:2003 (E)
Bibliography
[1]
EN 1127-1, Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts and methodology.
[2]
EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000).
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