1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58transport of liquid chemicals Hinged manhole covers and neckrings with pivoting boltsThe European S
2、tandard EN 14512:2006 has the status of a British StandardICS 13.300; 23.020.20Tanks for the transport of dangerous goods Tank equipment for the BRITISH STANDARDBS EN 14512:2006BS EN 14512:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 2
3、9 December 2006 BSI 2006ISBN 0 580 49880 8Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI.
4、 It is the UK implementation of EN 14512:2006.The UK participation in its preparation was entrusted to Technical Committee AUE/18, Tanks for the transport of dangerous goods.A list of organizations represented on AUE/18 can be obtained on request to its secretary.This publication does not purport to
5、 include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14512July 2006ICS 13.300; 23.020.20English VersionTanks for the transport of dangerous goods - Tank equipmentfor the transport of liquid chemicals - Hinged manhole coversand neckrings with pivoting boltsCite
6、rnes pour le transport de matires dangereuses -Equipements de la citerne pour le transport de produitschimiques liquides - Viroles et couvercles de trou dhomme boulons basculants charnireTanks fr die Befrderung gefhrlicher Gter - Ausrstungfr Tanks fr die Befrderung flssiger Chemieprodukte -Klappdeck
7、eldomeThis European Standard was approved by CEN on 19 June 2006.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 re
8、ferences 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 in
9、to 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, L
10、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rig
11、hts of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14512:2006: EEN 14512:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Function4 5 Design and materials.4 5.1 General4 5.2 Design .5 5.3 Materials
12、 .5 6 Test media 5 6.1 Hydraulic tests .5 6.2 Pneumatic tests .5 7 Type test .5 7.1 General5 7.2 Manhole cover pressure test6 8 Production tests.6 8.1 General6 8.2 Function test 6 8.3 Manhole cover pressure test6 9 Marking .6 10 Supply requirements .7 10.1 Order information 7 10.2 Installation and o
13、peration .7 Annex A (normative) Alternative empirical approval method 8 A.1 Proof test 8 A.1.1 General8 A.2 Hydraulic pressure test.8 EN 14512:2006 (E) 3 Foreword This document (EN 14512:2006) has been prepared by Technical Committee CEN/TC 296 “Tanks for transport of dangerous goods”, the secretari
14、at 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 January 2007, and conflicting national standards shall be withdrawn at the latest by January 2007. This European Stand
15、ard has been submitted for reference into the RID and/or in the technical annexes of the ADR. Therefore in this context the standards listed in the normative references clause and covering basic requirements of the RID/ADR not addressed within the present standard are normative only when the standar
16、ds themselves are referred to in the RID and/or in the technical annexes of the ADR. 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, Es
17、tonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14512:2006 (E) 4 1 Scope This European Standard specifies the require
18、ments for hinged manhole covers and neckrings with pivoting bolts for use on transportable tanks with a minimum working pressure greater than 50 kPa for the transport of dangerous goods by road and rail. 2 Normative references The following referenced documents are indispensable for the application
19、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 12266-1:2003, Industrial valves - Testing of valves - Part 1: Pressure tests, test procedures and acceptance criteria -
20、 Mandatory requirements EN 12266-2:2002, Industrial valves - Testing of valves - Part 2: Tests, test procedures and acceptance criteria - Supplementary requirements EN 14025:2003, Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction 3 Terms and definitions F
21、or the purposes of this document, the following terms and definitions apply. 3.1 maximum working pressure MWP maximum pressure up to which the equipment can be operated 3.2 test pressure highest effective pressure to which the shell is exposed during the hydraulic test 4 Function The manhole cover p
22、rovides access into the tank for inspection, cleaning, maintenance and loading of product. The neckring is an item that is welded into the tank that provides suitable sealing and fixation for the manhole cover. 5 Design and materials 5.1 General The manufacturer shall specify in drawings and other p
23、apers, the design and the materials of the manhole cover and neckring. The minimum inside diameter of the neckring, for personnel entry into the tank, shall be 500 mm. Smaller neckrings, maximum diameter 300 mm, are allowed for inspection and cleaning purposes. EN 14512:2006 (E) 5 5.2 Design 5.2.1 T
24、he manhole cover and neckring shall be designed for at least a working pressure of 265 kPa. The design shall conform to the general requirements laid down in EN 14025. The design shall be verified by meeting the requirements of EN 14025:2003, Clause 7. Alternatively, the design shall be verified by
25、meeting the requirements of Annex A. Design calculations will take into account working temperatures outside the range 20 C to +50 C. 5.2.2 The manhole cover shall be provided with a suitable number of clamping points with which to effect a seal onto the neckring given the tank test pressure and the
26、 seal material used. The neckring shall be provided with an appropriate number of retained, pivoting bolts or clamping points, which shall be attached to the neckring and fitted with a clamping mechanism of suitable design. 5.2.3 The opening of the manhole cover shall be controlled by a hinge incorp
27、orating a stop to prevent the cover from contacting the shell of the tank. 5.2.4 The neckring, prior to being welded into the tank, shall have a sealing face which shall be flat to within a maximum deviation of 0,5 mm and be round to within a maximum deviation of 3,0 mm. 5.2.5 A safety device shall
28、be provided where positive pressure within the tank might occur. 5.2.6 The manhole cover shall have a handle. 5.3 Materials 5.3.1 The manufacturer shall provide, with the equipment, material specification for those parts that may come into contact with the product. 5.3.2 The materials of the manhole
29、 cover and neckring shall comply with the requirements of ADR/RID and with EN 14025. 6 Test media 6.1 Hydraulic tests Hydraulic tests shall be carried out using a fluid in accordance with EN 12266-2:2002, A.1.5. 6.2 Pneumatic tests Pneumatic tests shall be carried out using a gas in accordance with
30、EN 12266-2:2002, A.1.5. 7 Type test 7.1 General The manhole cover shall be calculated in accordance with EN 14025, however should calculation to this standard not be possible an alternative procedure as described in Annex A may be carried out. Each manhole cover used for testing shall conform to the
31、 drawings and dimensions specified and specification provided by the manufacturer. Each design of manhole cover shall be subjected to a type test. Type testing according to 7.2 shall be carried out under ambient conditions. If the equipment is required to operate outside the temperature range 20 C t
32、o +50 C, the design shall be taken into account either in the type testing or by a validated calculation method. EN 14512:2006 (E) 6 7.2 Manhole cover pressure test The manhole cover shall be hydraulically or pneumatically tested on a test rig using equivalent design of the neckring and pivoting bol
33、ts or hold downs, using a test medium conforming to 6.1 or 6.2, at a pressure equal to 1,3 times the MWP or 4 bar, whichever is the greater. The test pressure shall be maintained for a minimum of 5 min on the manhole cover without permanent deformation occurring. The leakage rate shall not exceed Ra
34、te B of EN 12266-1:2003, Table A.5. 8 Production tests 8.1 General Each manhole cover, neckring, seal and pivot bolts produced shall conform to the drawings and other papers, in which the design and the materials were specified by the manufacturer. The production testing according to 8.2 to 8.3 shal
35、l be carried out under ambient conditions. 8.2 Function test Each manhole cover, seal and hold down bolt shall be fitted to the neckring and checked for alignment of the seal to the sealing face and the correct location and operation of the hold down bolts. 8.3 Manhole cover pressure test Each manho
36、le cover shall be hydraulically or pneumatically tested, using a test medium conforming to 6.1 or 6.2, at a pressure at least equal to 1,3 times the MWP or 4 bar, whichever is the greater. The test pressure shall be maintained for a minimum of 1 min on the manhole cover during which test period leak
37、age shall not exceed Rate B as defined in EN 12266-1:2003, Table A.5. Each neckring shall be hydraulically pressure tested in conjunction with the tank, following welding into the tank by the purchaser. 9 Marking The manhole cover and neckring shall be permanently marked with the following informati
38、on: a) DN (nominal size) of the equipment; b) manufacturers name or symbol; c) materials of construction; d) maximum test pressure; e) maximum working pressure (MWP); f) year of manufacture; g) unique serial number; h) reference number of this standard (i.e. EN 14512:2006); i) temperature range (if
39、not within the range 20C to +50C). EN 14512:2006 (E) 7 10 Supply requirements 10.1 Order information Information such as product to be carried in the tank, nominal size, test pressure, MWP of the manhole cover, seal type, number of hold down bolts, and maximum and minimum operating temperatures shal
40、l be provided by the customer at the time of ordering. 10.2 Installation and operation The manufacturer shall provide with each piece of equipment installation, operating and maintenance instructions for correct use of the equipment in accordance with the manufacturers recommendations. EN 14512:2006
41、 (E) 8 Annex A (normative) Alternative empirical approval method A.1 Proof test A.1.1 General Each manhole cover and respective hold down bolt used for testing shall conform to the drawings and dimensions specified and material specification provided by the manufacturer. Each design of manhole cover
42、 shall be subjected to a type test. Type testing of the manhole cover, in accordance with 7.2 shall be carried out under ambient conditions. Where the manhole cover is required to operate outside the temperature range -20 C to +50 C, this shall be taken into account in the function test in 8.2. A.2
43、Hydraulic pressure test The manhole cover, neckring, seal and hold down bolts shall be hydraulically tested, using a test medium conforming to Clause 6, with a pressure equal to a minimum of 2,25 times the MWP of the manhole cover and cycled, pressure on/pressure off, for 1 000 cycles. The manhole c
44、over, following the cyclic test, shall have no permanent deformation. blankBS EN BSI389 Chiswick High RoadLondonW4 4AL14512:2006BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the
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