SIST EN 12927-8:2005
(Main)Safety requirements for cableway installations designed to carry persons - Ropes - Part 8: Magnetic rope testing (MRT)
Safety requirements for cableway installations designed to carry persons - Ropes - Part 8: Magnetic rope testing (MRT)
This part of EN 12927 specifies the minimum requirements of MRT equipment and procedures for use in the examination of steel wire ropes used on cableways for passenger transport.
Performance requirements and testing of MRT equipment and qualification of personnel engaged in carrying out MRT are also included.
This part of EN 12927 does not include requirements relating to the protection of workers.
Sicherheitsanforderungen für Seilbahnen für den Personenverkehr - Seile - Teil 8: Magnetische Seilprüfung (MRT)
Das Ziel dieser europäischen Norm ist die Festlegung von Anforderungen an magnetische Prüfgeräte für im Personentransport eingesetzte Seile. Diese Anforderungen müssen unter Berücksichtigung der unterschiedlichen Seilarten und ihren Funktionen erfüllt werden. Sie umfaßt die allgemeinen Anforderungen an Prüfgeräte und ihren Einsatz bei der Prüfung aller Seilarten, die bei Seilbahnen für den Personenverkehr benutzt werden. Die Norm enthält die Leistungskriterien der Geräte, Prüfmethoden (Typprüfung und Herstellung) und Qualifikationsanforderungen an das Personal.
Prescriptions de sécurité pour les installations a câbles transportant des personnes - Câbles - Partie 8 : Contrôles non-destructifs par contrôle électromagnétique
La présente partie de l'EN 12927 spécifie les prescriptions minimales relatives aux équipements de contrôle électromagnétique et aux modes opératoires a suivre lors du contrôle des câbles en acier utilisés dans les les installations a câbles transportant des personnes.
Les prescriptions de performance et les essais des équipements de contrôle électromagnétique ainsi que la qualification du personnel chargé de la réalisation des contrôles électromagnétiques entrent également dans son domaine d'application.
Les prescriptions relatives a la protection des travailleurs ne sont pas prévues dans la présente partie de l'EN 12927.
Varnostne zahteve za žičniške naprave za prevoz oseb – Vrvi – 8. del: Pregledi vrvi z magnetno induktivno metodo
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Safety requirements for cableway installations designed to carry persons - Ropes - Part 8: Magnetic rope testing (MRT)Prescriptions de sécurité pour les installations a câbles transportant des personnes - Câbles - Partie 8 : Contrôles non-destructifs par contrôle électromagnétiqueSicherheitsanforderungen für Seilbahnen für den Personenverkehr - Seile - Teil 8: Magnetische Seilprüfung (MRT)Ta slovenski standard je istoveten z:EN 12927-8:2004SIST EN 12927-8:2005en45.100Cableway equipmentICS:SLOVENSKI
STANDARDSIST EN 12927-8:200501-januar-2005
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12927-8October 2004ICS 45.100English versionSafety requirements for cableway installations designed to carrypersons - Ropes - Part 8: Magnetic rope testing (MRT)Prescriptions de sécurité pour les installations à câblestransportant des personnes - Câbles - Partie 8 : Contrôlesnon-destructifs par contrôle électromagnétiqueSicherheitsanforderungen für Seilbahnen undSchleppaufzüge des Personenverkehrs - Seile - Teil 8:Zerstörungsfreie PrüfungenThis European Standard was approved by CEN on 23 August 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12927-8:2004: E
EN 12927-8:2004 (E) 2 Contents Page Foreword.3 Introduction.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 4 Symbols and abbreviations.7 5 Principles of operation.8 5.1 General.8 5.2 Electromagnetic instrument.8 5.3 Magnetic flux instruments.8 5.4 Magnetic flux leakage instruments.8 6 Safety principles.9 6.1 General.9 6.2 Hazard scenarios.9 6.3 Safety measures.9 7 Safety requirements and/or measures.10 7.1 Equipment.10 7.2 Personnel.11 7.3 MRT procedure.12 8 Verification.13 8.1 General.13 8.2 Performance test - LD channel.13 8.3 Performance test - LMA channel.14 9 Test report.15 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2000/9/EC relating to cableway installations designed to carry persons.16
EN 12927-8:2004 (E) 3 Foreword This document (EN 12927-8:2004) has been prepared by Technical Committee CEN/TC 242 “Safety requirements for passenger transportation by rope”, the secretariat of which is held by AFNOR. 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 April 2005, and conflicting national standards shall be withdrawn at the latest by April 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 EU Directive(s), see informative Annex ZA, which is an integral part of this document. This EN 12927 consists of the following parts, under the general title “Safety requirements for cableway installations designed to carry persons – Ropes”: Part 1: Selection criteria for ropes and their end fixings Part 2: Safety factors Part 3: Long splicing of 6 strand hauling, carrying-hauling and towing ropes Part 4: End fixings Part 5: Storage, transportation, installation and tensioning Part 6: Discard criteria Part 7: Inspection, repair and maintenance Part 8: Magnetic rope testing (MRT) This European Standard forms part of the standards programme adopted by the CEN Technical Board (CEN/BT) in relation to safety requirements for passenger transportation by rope. This programme comprises the following standards. 1) Safety requirements for cableway installations designed to carry persons
- Terminology 2) Safety requirements for cableway installations designed to carry persons
- General requirements 3) Safety requirements for cableway installations designed to carry persons
- Calculations 4) Safety requirements for cableway installations designed to carry persons
- Ropes 5) Safety requirements for cableway installations designed to carry persons
- Tensioning devices 6) Safety requirements for cableway installations designed to carry persons
- Drive systems and other mechanical equipment 7) Safety requirements for cableway installations designed to carry persons
- Carriers 8) Safety requirements for cableway installations designed to carry persons
- Electrical equipment other than for drive systems
EN 12927-8:2004 (E) 4 9) Safety requirements for cableway installations designed to carry persons
- Civil engineering works 10) Safety requirements for cableway installations designed to carry persons
- Pre-commissioning inspection, maintenance and operational inspection and checks 11) Safety requirements for cableway installations designed to carry persons
- Recovery and evacuation 12) Safety requirements for cableway installations designed to carry persons
- Operation 13) Safety requirements for cableway installations designed to carry persons
- Quality assurance Together these form a series of standards regarding design, manufacture, production, maintenance and operation of all installations for passenger transportation by rope. In respect of ski-tows the drafting of this European Standard has been guided by the works of the International Organisation for transportation by rope (OITAF). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 12927-8:2004 (E) 5 Introduction Magnetic ropes testing is carried out as a supplement to visual rope inspection and is used to ensure the safe operation of ropes in service, with the advantage that it provides valuable information about the internal condition of the rope. In the context of this document, MRT equipment is categorised as either electromagnetic or permanent magnetic equipment using magnetic-flux and/or magnetic flux leakage principles and capable of detecting discontinuities and/or changes in metallic cross-sectional area in ferromagnetic wire ropes. The non-destructive magnetic rope testing (MRT) of ferro-magnetic steel wire ropes is a special field often involving the use of dedicated equipment for the testing of particular types of rope.
EN 12927-8:2004 (E) 6
1 Scope This part of EN 12927 specifies the minimum requirements of MRT equipment and procedures for use in the examination of steel wire ropes used on cableways for passenger transport. Performance requirements and testing of MRT equipment and qualification of personnel engaged in carrying out MRT are also included. This part of EN 12927 does not include requirements relating to the protection of workers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1709 Safety requirements for cableway installations designed to carry persons - Precommissioning inspection, maintenance, operational inspection and checks prEN 1907:2004, Safety requirements for cableway installations designed to carry persons – Terminology. EN 12385-2:2002, Steel wire ropes - Safety - Part 2: Definitions, designation and classification. EN 12927-6, Safety requirements for cableway installations designed to carry persons
- Ropes - Part 6: Discard criteria. EN 12929-1, Safety requirements for cableway installations designed to carry persons - General requirements - Part 1: Requirements for all installations.
EN 12927-8:2004 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 1907:2004, in EN 12385-2:2002 and the following apply. 3.1 single function instrument instrument which detects either local discontinuities (LD) or loss of metallic cross-sectional area (LMA) 3.2 dual function instrument instrument which simultaneously detects losses of metallic cross-sectional area (LMA) and local discontinuities (LD) 3.3 local discontinuity (LD) localised fault or defect such as a broken or damaged wire or a corrosion pit on a wire 3.4 background noise random variations in the signal caused by the characteristics of the system 3.5 signature the signals on the test recording display as the rope travels through the test head on the first occasion that it is tested. The signature is taken as the datum upon which in-service deterioration effects are referred. The signature reflects the construction of the rope and changes in magnetic characteristics of the rope among its length, e.g. magnetic permeability differences 3.6 test head device on that part of the test equipment positioned around the rope during testing which generates the magnetising field and contains the detecting or sensing elements 3.7 wire break (WB) indication from the LD channel of the test equipment specifically identified as an internal or external wire break type 3.8 loss of metallic cross sectional area (LMA) LMA is the result of the comparison between a reference metallic cross sectional area and a present metallic cross sectional area of the rope as measured by MRT. It is usually expressed as a percentage 4 Symbols and abbreviations d
nominal rope diameter
EN 12927-8:2004 (E) 8 5 Principles of operation 5.1 General MRT instruments are designed to operate on one or more of the principles as detailed in 5.2 to 5.4. Loss of metallic cross-sectional area can be determined by using an instrument based on the principles described in 5.2 and 5.3. Broken wires and corrosion can be detected by using a magnetic flux leakage instrument as described in 5.4. One instrument may incorporate both magnetic flux and magnetic flux leakage principles. 5.2 Electromagnetic instrument An electromagnetic wire rope testing instrument works on the transformer principle with primary and secondary coils wound around the rope.
The rope acts as the transformer core. The primary coil is energised with low frequency alternative current, typically in the 10-to-30-hertz range. The secondary coil measures the magnetisation of the rope. Any significant change in the magnetic characteristics in the core will be reflected as voltage changes (amplitude and phase) in the secondary coil. Electromagnetic instrum
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