1、BRITISH STANDARDBS EN 14841:2005LPG equipment and accessories Discharge procedures for LPG rail tankersThe European Standard EN 14841:2005 has the status of a British StandardICS 23.020.20; 45.060.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g
2、59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14841:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 January 2006 BSI 16 January 2006ISBN 0 580 46992 1National forewordThis Brit
3、ish Standard is the official English language version of EN 14841:2005. The UK participation in its preparation was entrusted to Technical Committee PVE/19, LPG containers and their associated fittings, which has the responsibility to: A list of organizations represented on this committee can be obt
4、ained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility o
5、f the BSI Electronic 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. aid
6、enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis docum
7、ent comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME
8、EUROPENNEEUROPISCHE NORMEN 14841December 2005ICS 23.020.20; 45.060.20English VersionLPG equipment and accessories - Discharge procedures forLPG rail tankersEquipements pour GP et leurs accessoires - Procdures dedchargement des wagons-citernes pour GPLFlssiggas-Gerte und Ausrstungsteile -Entleerungsv
9、erfahren fr Eisenbahnkesselwagen frFlssiggas (LPG)This European Standard was approved by CEN on 26 October 2005.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 alte
10、ration. 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 transla
11、tionunder 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
12、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassar
13、t, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14841:2005: EEN 14841:2005 (E) 2 Contents Page Foreword 3 1 Scope .4 2 Terms and definitions.4 3 General 4 4 Procedures 4 4.1 General 4 4.2 Discharge procedur
14、es/operations .5 4.3 Discharging by pumps .6 4.4 Discharging by compressor.6 5 Emergency procedure 6 Annex A (informative) Checklist for rail tanker handling 8 A.1 Rail tanker and delivery information .8 A.2 Condition of rail tanker.9 A.3 Securing of a faulty rail tanker.10 Annex B (informative) Ide
15、ntification of rail tankers .11 EN 14841:2005 (E) 3 Foreword This European Standard (EN 14841:2005) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is held by NSAI. This European Standard shall be given the status of a
16、 national standard, either by publication of an identical text or by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at the latest by June 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following cou
17、ntries 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, Switze
18、rland and United Kingdom. EN 14841:2005 (E) 4 1 Scope This European Standard specifies discharge, emergency procedures and handling operations for rail tankers used for the transport of liquefied petroleum gas (LPG). This European Standard applies to operations where LPG is off-loaded from rail tank
19、ers into LPG fixed storage facilities. This European Standard does not apply to “tank containers“ and “batteries of receptacles“. 2 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 2.1 LPG (liquefied petroleum gas) mixture of predominantly
20、butane or propane with traces of other hydrocarbon gases classified in accordance with UN number 1965, hydrocarbon gases mixture, liquefied, NOS or UN number 1075, petroleum gases, liquefied NOTE In some countries, UN numbers 1011 and 1978 may also be designated LPG. 2.2 competent person person who,
21、 by a combination of training, experience and supervision, is able to make objective judgements on the subject 2.3 anti-drive-away interlock method of ensuring that if the rail tanker is accidentally moved while connected there is no uncontrolled release of LPG 3 General Handling operations such as:
22、 accepting rail tankers upon arrival; off-loading of LPG; preparation and returning rail tanker shall be carried out under the supervision of a competent person (e.g. operator of the site) and shall be in accordance with the site procedures. 4 Procedures 4.1 General Site procedures including emergen
23、cy procedures shall be available, understood and followed by all persons involved in each operation. This shall be achieved by training and supervision. The responsibilities of the persons involved shall be clearly defined. EN 14841:2005 (E) 5 The procedures shall include a check of the rail tanker
24、that is to be carried out before it is accepted. This shall include: the marking (see Annex B): a check of the integrity of the rail tanker; a check of tamper evident seals; an identification check of LPG quality and grade. Where deficiencies are found they shall be recorded and reported to the appr
25、opriate body (e.g. rail tanker loader) and the rail tanker owner. A rail tanker shall not be off loaded until any necessary remedial work has been completed. Copies of checklists (see Annex A) and deficiency reports shall be retained. 4.2 Discharge procedures/operations 4.2.1 The rail tanker shall b
26、e moved to the discharge area and positioned as required by the site procedures. 4.2.2 Brakes or other equivalent means shall be applied to prevent unintended movement of the rail tanker during discharge. The site, where the rail tankers are parked for discharging, shall be isolated from other rail
27、traffic. If fitted, anti-drive-away interlocks shall be engaged. 4.2.3 Operators shall wear appropriate personal protection equipment while carrying out LPG transfer operations. 4.2.4 The electrostatic potential of the rail tanker and the fixed installation shall then be equalised before the LPG hos
28、es/arms are connected. 4.2.5 All rail tanker outlets valves and/or foot valves shall be checked to ensure that they are in the closed position. 4.2.6 Blanking caps or blind flanges shall be removed from the liquid and vapour connections. 4.2.7 Ensure that the site is safe for discharging LPG and ade
29、quate storage capacity is available. Specific requirements for this shall be part of the site procedures. 4.2.8 Hoses/arms shall be checked for kinks, wear or obvious damage. Fill-couplings and seals shall be examined to ensure compatibility and that no dirt etc. is present before connection. 4.2.9
30、Connections shall be properly made before starting to discharge. Hoses/loading arms shall not be fully extended in making the connections. A check shall be made for any sign of leakage before discharging commences. Any leakage shall be rectified before proceeding. 4.2.10 If the rail tanker is equipp
31、ed with bottom foot valve(s) an emergency ripcord shall be connected to the rail hook that will shut down the bottom foot valve in the event of unintended movement of the rail tanker. 4.2.11 Valves shall be opened in the correct sequence as stated by the site procedure. 4.2.12 The delivery shall be
32、stopped when the maximum fill level in the receiving tank is reached or the rail tanker is empty. NOTE Transfer rates may need to be reduced to ensure that the maximum fill is not exceeded. EN 14841:2005 (E) 6 4.2.13 Valves shall be closed in the correct sequence as stated in the site procedure and
33、the ripcord shall be disconnected. 4.2.14 The rail tanker shall be disconnected and hoses stowed or reeled in and blanking caps/blind flanges re-fitted, followed by a visual final inspection of the rail tanker and the discharge equipment. 4.2.15 Anti-drive-away interlocks shall stay engaged until th
34、e rail tanker can be safely moved. 4.2.16 The connection for equalising the electrostatic potential of the rail tanker and the fixed installation shall not be disconnected until hoses/loading arms are disconnected and stowed. 4.3 Discharging by pumps 4.3.1 When discharging a rail tanker with a pump
35、it is not essential to connect the vapour return line. 4.3.2 Operating and safety requirements as stipulated by the pump manufacturer shall be adhered to. 4.3.3 The pumps shall be protected against damage due to dry running/cavitation. 4.4 Discharging by compressor 4.4.1 When discharging a rail tank
36、er using a compressor it is essential to have the vapour return line connected and open before starting the compressor. 4.4.2 Operating and safety requirements stipulated by the compressor manufacturer shall be adhered to. 4.4.3 Care shall be taken to avoid exceeding the maximum allowable working pr
37、essure of the rail tanker and/or the receiving tank. 4.4.4 Where vapour recovery is required the liquid outlet valve shall be closed. The compressor valving shall be set for vapour recovery. Care shall be taken not to decrease the pressure in the rail tanker below the pre-defined safe pressure level
38、. NOTE Advantage of any existing pressure differentials should be taken when starting the discharge procedure before starting the compressor. Negative pressure shall be avoided in the rail tanker because of the danger of air ingress into the rail tanker and possible mechanical damage to the pressure
39、 envelope. 5 Emergency procedure The overall site emergency procedures shall at least include the following for the rail tanker off-loading facilities: notification/raising of the alarm; evacuation plan; LPG leakage; LPG fire including fire fighting plan; accidents; EN 14841:2005 (E) 7 return to ser
40、vice; incident/accident investigation and corrective actions. EN 14841:2005 (E) 8 Annex A (informative) Checklist for rail tanker handling A.1 Rail tanker and delivery information Loaded at: Rail tanker No.: Date in: Date out: Ao/A-Butane B-Propane/Butane Mixture according to the accompanying paper:
41、 C-Propane EN 14841:2005 (E) 9 A.2 Condition of rail tanker When receiving: At return: 1. external check OK yes/no yes/no 2. blind flanges/caps OK, all bolts in place and tight yes/no yes/no 3. tamper evident seal OK yes/no 4. gaskets OK yes/no yes/no 5. no LPG leaks yes/no yes/no 6. no hydraulic le
42、aks yes/no yes/no 7. no external mechanical damage yes/no yes/no 8. foot valve OK yes/no yes/no 9. emergency screw not activated yes/no yes/no 10. permanent marking legible yes/no yes/no 11. sign 196523in place yes/no yes/no12. flame symbols in place: red diamond yes/no yes/no 13. red triangle (mode
43、l 13 RID) yes/no yes/no 14. consignment note checked yes/no yes/no 15. no other faults yes/no yes/no Description of faults (number of fault/description): Accepted for discharge Yes/no Name/company EN 14841:2005 (E) 10 A.3 Securing of a faulty rail tanker Rail tanker secured by brake and drag shoe ye
44、s/no Earthing connection made yes/no Site safety distances maintained yes/no Wire connected with rail hook/pneumatic yes/no Faults reported (see A.2) yes/no Company: Telephone no.: Reported by: Talked to Mr./Mrs.: And received following order: Other comments: Faults discovered by: Site address/Date:
45、 Branch/filling company: EN 14841:2005 (E) 11 Annex B (informative) Identification of rail tankers International Transport Regulation (RID) requires marking/Identification of the rail tanker on the tank name plate which, for LPG transport, covers the following: 1) Approval Number 2) Name or Identifi
46、cation of Manufacturer 3) Manufacturer Number 4) Year of construction 5) Test pressure (MPa) 6) Capacity)(l) 7) Maximum operating temperature (C) 8) Date of initial and last inspection (xx=month/yy=year) 9) Material quality and material standard of tank shell 10) Maximum operating pressure (design p
47、ressure)(MPa) 11) Insulation 12) Acceptable gases Maximum mass (kg) Butane Isobutane Butane mixture Propane Propene 1,3 - Butadiene, stabilised Mixture of Buta-1,3-dien and Hydrocarbon, stabilised EN 14841:2005 (E) 12 Hydrocarbon mixture, liquid, n.o.s - Mixture A - Mixture A 0 - Mixture A 01 - Mixt
48、ure A 02 - Mixture A 1 - Mixture B -Mixture B1 -Mixture B2 - Mixture C - Mixture Butene 13) Date and stamp mark of the competent person at retest 1 2 3 4 5 6 7 8 9 10 blankBS EN 14841:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body respo
49、nsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Sec
