1、BSI Standards PublicationBS EN 14841:2013LPG equipment and accessories Discharge procedures forLPG rail tankersBS EN 14841:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14841:2013. Itsupersedes BS EN 14841:2005 which is withdrawn.The UK participation in i
2、ts preparation was entrusted to TechnicalCommittee PVE/19, LPG containers and their associated fittings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are r
3、esponsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 79328 8ICS 23.020.20; 45.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority o
4、f theStandards Policy and Strategy Committee on 31 December 2013.Amendments issued since publicationDate Text affectedBS EN 14841:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14841 December 2013 ICS 23.020.20; 45.060.20 Supersedes EN 14841:2005English Version LPG equipment and accessorie
5、s - Discharge procedures for LPG rail tankers quipements pour GPL et leurs accessoires - Procdures de dchargement des wagons-citernes pour GPL Flssiggas-Gerte und Ausrstungsteile - Entleerungsverfahren fr Eisenbahnkesselwagen fr Flssiggas (LPG) This European Standard was approved by CEN on 19 Octobe
6、r 2013. 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 obtai
7、ned on application to the CEN-CENELEC 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 CEN
8、-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland,
9、 Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre:
10、 Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14841:2013: EBS EN 14841:2013EN 14841:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Terms and definitions .5 3 General 5 4 Pr
11、ocedures .5 4.1 General 5 4.2 Discharge procedures/operations .6 4.3 Discharging by pumps 7 4.4 Discharging by compressor .7 5 Emergency procedure .7 Annex A (informative) Environmental checklist .8 BS EN 14841:2013EN 14841:2013 (E) 3 Foreword This document (EN 14841:2013) has been prepared by Techn
12、ical 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 national standard, either by publication of an identical text or by endorsement, at the latest by June 2014 and conflicting n
13、ational standards shall be withdrawn at the latest by June 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document superse
14、des EN 14841:2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
15、Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia
16、, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14841:2013EN 14841:2013 (E) 4 Introduction Protection of the environment is a key political issue in Europe and elsewhere. Protection of the environment is taken in a very broad sense. What is meant is the total life cycle aspects of
17、, e.g. a product on the environment, including expenditure of energy and during all phases from mining of raw materials, fabrication, packaging, distribution, use, scrapping, recycling of materials, etc. NOTE Annex A indicates which clauses in this standard address environmental issues. Provisions a
18、re to be restricted to a general guidance. Limit values are specified in national laws. It is recommended that companies using this standard develop an environmental management policy. For guidance see ISO 14000 series. BS EN 14841:2013EN 14841:2013 (E) 5 1 Scope This European Standard specifies dis
19、charge, handling operations and emergency procedures for rail tankers used for the transport of liquefied petroleum gas (LPG). This European Standard applies to operations where LPG is discharged from rail tankers into LPG fixed storage facilities. This European Standard does not apply to “tank cont
20、ainers” and “batteries of receptacles”. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 liquefied petroleum gas LPG low pressure liquefied gas composed of one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969
21、 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases 2.2 competent person person who, by a combination of appropriate qualification, training, experience and resources, is able to make objective judgements on the subjec
22、t 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: accepting rail tankers upon arrival; discharge of LPG; and preparation and returning rail tanker shall be ca
23、rried 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 emergency procedures shall be available, understood and followed by all persons involved in each operation. This s
24、hall be achieved by training and supervision. The responsibilities of the persons involved shall be clearly defined. The procedures shall include a check of the rail tanker that is to be carried out before it is accepted. This shall include: the marking; BS EN 14841:2013EN 14841:2013 (E) 6 a check o
25、f the integrity of the rail tanker; a check of tamper evident seals; and an identification check of LPG quality and grade. Where deficiencies are found they shall be recorded and reported to the appropriate body (e.g. rail tanker loader) and the rail tanker operator. A rail tanker shall not be disch
26、arged until any necessary remedial work has been completed. Copies of checklists and deficiency reports shall be retained. 4.2 Discharge procedures/operations 4.2.1 The rail tanker shall be moved to the discharge area and positioned as required by the site procedures. 4.2.2 Parking brakes or other e
27、quivalent 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 traffic. If fitted, anti-drive-away interlocks shall be engaged. 4.2.3 Personnel carrying out LPG transf
28、er operations shall wear personal protection equipment according to applicable regulations. Discharging shall be done under the constant supervision of a competent person. 4.2.4 The electrostatic potential of the rail tanker and the fixed installation shall then be equalised before the LPG hoses or
29、loading arms are connected. 4.2.5 All rail tanker outlet 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 to be used. 4.2.7 Ensure that the site is safe for discharging LPG and adequat
30、e storage capacity is available. Specific requirements for this shall be part of the site procedures. 4.2.8 Hoses and loading arms shall be checked for kinks, wear or obvious damage. Fill-couplings, seals and necessary attachments shall be examined to ensure compatibility and that no dirt or any oth
31、er foreign matter is present before connection. 4.2.9 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
32、before proceeding. 4.2.10 If the rail tanker is equipped with foot valve(s) an emergency ripcord shall be connected to the rail hook that will shut down the foot valve in the event of unintended movement of the rail tanker. 4.2.11 Valves shall be opened in the prescribed sequence as stated by the si
33、te procedure. 4.2.12 The delivery shall be stopped when the maximum fill level in the receiving tank is reached or the rail tanker is empty. Transfer rates may need to be reduced to ensure that the maximum fill is not exceeded. 4.2.13 Valves shall be closed in the prescribed sequence as stated in th
34、e site procedure and the ripcord shall be disconnected. BS EN 14841:2013EN 14841:2013 (E) 7 4.2.14 After disconnection of the filling line and any other connections to the tanker (vapour return or tanker loading control) all rail tanker valves shall be properly closed and the lines stowed. Blanking
35、caps and blind flanges shall be secured in place and checked for leaks. 4.2.15 Anti-drive-away interlocks shall stay engaged until the 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 disconne
36、cted until hoses/loading arms are disconnected and stowed. 4.3 Discharging by pumps 4.3.1 When discharging a rail tanker with a pump 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 pu
37、mps shall be protected against damage due to dry running/cavitation. 4.4 Discharging by compressor 4.4.1 When discharging a rail tanker 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 stipula
38、ted by the compressor manufacturer shall be adhered to. 4.4.3 Care shall be taken to avoid exceeding the maximum allowable working pressure of the rail tanker and the receiving tank. 4.4.4 Where vapour recovery is required the liquid outlet valve shall be closed. The compressor valving shall be set
39、for vapour recovery. Care shall be taken not to decrease the pressure in the rail tanker below the pre-defined safe pressure level. Advantage of any existing pressure differentials should be taken when starting the discharge procedure before starting the compressor. Negative pressure shall be avoide
40、d in the rail tanker because of the danger of air ingress into the rail tanker and possible mechanical damage to the pressure envelope. 5 Emergency procedure The overall site emergency procedures shall include at least the following for the rail tanker discharge operations: notification/raising of t
41、he alarm; evacuation plan; LPG leakage; LPG fire including fire fighting plan; accidents; return to service; and incident/accident investigation and corrective actions. BS EN 14841:2013EN 14841:2013 (E) 8 Annex A (informative) Environmental checklist Table A.1 Stages of the life cycle All stages Acq
42、uisition Production Use End-of-Life Environmental Aspect Rawmaterials andenergyPre-manufacturedmaterialsandcomponentsProductionPackagingUseMaintenanceandrepairUseofadditionalproductsReuse /Materialand EnergyRecoveryIncinerationwithoutenergyrecoveryDepositionTransportationInputs Materials Water Energ
43、y Land Outputs Emissions to air 4.2 Discharges to water Discharges to soil Waste Noise, vibration, radiation, heat losses 4.3 4.4 Other relevant aspects Risk to the environment from accidents or unintended use 4.2 4.3 4.4 Customer information This page deliberately left blankBSI is the national body
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