BS-EN-ISO-3170-1999.pdf

BRITISH STANDARD BS EN ISO 3170:1999 Petroleum liquids Manual sampling The European Standard EN ISO 3170:1998 has the status of a British Standard ICS 75.080 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 3170:1999 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 © BSI 05-1999 ISBN 0 580 28208 2 National foreword This British Standard is the English language version of EN ISO 3170:1998. It supersedes BS 3195-1:1989, which is withdrawn. It is identical with ISO 3170:1988, including its Amendment 1:1998. The UK participation in its preparation was entrusted by Technical Committee PTI/12, Petroleum measurement and sampling, to Subcommittee PTI/12/1, Static and dynamic petroleum measurement, 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 obtained on request to its secretary. Additional information The definitions given in clause 3 apply for the purposes of this standard only. They do not apply for the purposes of other British Standards unless specific reference is made to them. WARNING Attention is drawn to clause 6 and the need to observe the safety precautions and the requirements of the Health and Safety at Work etc. Act 1974. With respect to 6.1, 6.2 and 7.2.5.2, the user should be familiar with the relevant UK regulations, which should be observed. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 30 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 3170:1999 © BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Introduction3 1Scope3 2Normative reference3 3Definitions4 4Principles7 5Apparatus8 6Safety precautions17 7Procedures19 8Procedures for crude oils and other non-homogeneous petroleum liquids27 9Sample handling28 Annex A (informative) Bibliography30 Figure 1 Examples of sample positions6 Figure 2 Examples of sample cages9 Figure 3 Examples of weighted sampling cans10 Figure 4 Restrictive filling devices for running samplers11 Figure 5 Example of interface sampler12 Figure 6 Examples of bottom samplers and details of opening/closing mechanism13 Figure 7 Deposit sampler14 Figure 8 Example of an all-levels sampling device15 Figure 9 Example of vapour-lock device16 Figure 10 Example of sampling tube17 Table 1 Sampling of horizontal cylindrical tanks22 Table 2 Sampling plans24 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 3170 September 1998 ICS 75.080 Descriptors: Crude oil, petroleum products, liquids, sampling, sampling equipment, samplers, safety measures English version Petroleum liquids Manual sampling (ISO 3170:1988, including Amendment 1:1998) Produits pétroliers liquides Echantillonnage manuel (ISO 3170:1988, amendement 1:1998 inclus) Flüssige Mineralölerzeugnisse Manuelle Probenahme (ISO 3170:1988, einschließlich Änderung 1:1998) This European Standard was approved by CEN on 20 September 1998. 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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3170:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 3170:1998 © BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 28, Petroleum products and lubricants, of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 19, Petroleum products, lubricants and related products, the Secretariat of which is held by NNI. 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 March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999. According to 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 3170:1998 © BSI 05-19993 Introduction This International Standard should be applied in combination with ISO 3171, Petroleum liquids Automatic pipeline sampling. The purpose of this International Standard is to standardize conditions for obtaining a sample of liquid/semi-liquid hydrocarbons from a tank, drum or pipeline. If the hydrocarbon materials to be sampled are of non-homogeneous character showing significant variations in composition or containing sediments and water, samples taken manually should not be expected to be representative, but enable the degree of nonhomogeneity to be assessed and estimates of quality and quantity to be made. It is realized that in many countries some or all of the items covered by this International Standard are the subject of mandatory regulations imposed by the laws of those countries; such regulations must be rigorously observed. In cases of conflict between such mandatory regulations and this International Standard, the former shall prevail. 1 Scope 1.1 This International Standard specifies the procedures to be used for obtaining, by manual methods, samples of liquid hydrocarbons, tank residues and deposits from fixed tanks, railcars, road vehicles, ships and barges, drums and cans, or from liquids being pumped in pipelines (see 4.3). 1.2 It applies to the sampling of liquid petroleum products, crude oils and intermediate products, which are stored in tanks at or near atmospheric pressure, or transferred by pipelines, and are handled as liquids at temperatures from near ambient up to 100 °C. The sampling procedures specified are not intended for the sampling of special petroleum products which may be the subject of other international Standards, such as electrical insulating oils, liquefied petroleum gases, liquefied natural gases, bitumen and chemical products, nor to unstabilized crude oils having a Reid vapour pressure above 180 kPa (1,8 bar). 1.3 Two basic manual sampling methods are available: tank sampling; pipeline sampling. When a batch is received or consigned, either tank or pipeline sampling, or both, may be possible. However, if both methods are used, the two sets of samples shall not be mixed. 1.4 Procedures are specified which minimize or eliminate losses of light ends from samples. Such losses can occur during handling or transfer of samples thereby making them non-representative of the bulk material. 1.5 If the procedures intended for obtaining representative samples of stocks or movements of homogeneous petroleum liquids are applied to non-homogeneous liquids having significant variations in composition or containing sediments and/or water, the samples may not be representative. 1.6 The sampling procedures specified are intended to provide samples for the following purposes: a) the determination of the oil quality; b) the determination of the water content of the oils; c) the determination of other contaminants that are not considered to be part of the liquid transferred. If the sampling conditions for the purposes a), b) and c) are in conflict, separate samples are required. 1.7 Sampling procedures for tank contents that are not homogeneous are specified that enable the degree of non-homogeneity to be assessed and estimates of quality and quantity to be made. 1.8 Procedures for the sampling of residues and deposits in tanks are included, together with techniques for liquid hydrocarbons under inert gas pressure. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3171:1988, Petroleum liquids Automatic pipeline sampling. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 3170:1998 4 © BSI 05-1999 3 Definitions 3.1 competent person a person who, by reason of his or her training, experience and theoretical and practical knowledge, is able to detect any defects or weaknesses in the plant or equipment and to make an authoritative judgement as to its suitability for further use NOTEThis person should have sufficient authority to ensure that the necessary action is taken following his or her recommendations. 3.2 integrity of the sample the condition of being complete and unaltered, i.e. the sample being preserved with the same composition as when it was taken from the bulk of the liquid 3.3 mixer a device which provides a homogeneous mixture of the liquid within a pipeline or container in order to obtain a representative sample 3.3.1 static mixer a mixing device having no moving parts and located within a pipe or tube. It depends on the kinetic energy of the moving liquid for the energy required to mix the liquid 3.4 pipeline any section of pipe used for the transfer of liquid. An unobstructed pipe does not have any internal fittings such as a static mixer or orifice plate 3.5 residues and deposits organic and inorganic material, together with any water dispersed within it, which has separated from the liquid and either a) fallen to the bottom of the tank containing the liquid, or b) been left in the tank after the liquid has been pumped out. 3.6 sample conditioning homogenization necessary to stabilize the sample during sample handling in preparation for analysis 3.7 sample handling the conditioning, transferring, dividing and transporting of the sample. It includes transferring the sample from the sampler (receiver) to a container and from the container to the laboratory apparatus in which it is to be analysed 3.8 Sample types 3.8.1 all-levels sample a sample obtained with an apparatus which is filled when passed through the total liquid height in one direction 3.8.2 bottom sample a spot sample taken from the material at the bottom surface (floor) of a tank or container (see Figure 1) Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:37:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 3170:1998 © BSI 05-19995 3.8.3 composite sample a sample obtained by combining a number of spot samples in defined proportions so as to obtain a sample representative of the bulk of the material. The usual types of composite sample are obtained by combining samples in accordance with one of the following (see clause 4 and 7.3.1.1.2): a) upper, middle and lower samples in equal proportions; b) upper, middle and suction-level samples in equal proportions; c) a series of spot samples from a non-homogeneous oil taken at more than three levels and blended in proportion to the quantities of oil represented; d) individual samples from several tanks or ships compartments proportional to the total quantity each sample represents; e) a series of spot samples of equal volume obtained from a flowing pipeline taken at specified intervals. 3.8.4 representative sample a sample having its physical or chemical characteristics identical to the volumetric average characteristics of the total volume being sampled 3.8.5 running sample a sample obtained by lowering a container from the top of the oil to the bottom and returning it to the top of the oil at a speed such that the container is about three-quarters full when withdrawn from the oil 3.8.6 spot sample a sample taken at a specific location in a tank or from a pipe at a specific time during a pumping operation 3.8.7 suction-level sample a sample taken at the lowest level from which liquid hydrocarbon is pumped from the tank. In determining this level, appropriate allowance is made for any fittings within the tank such as swing-arm, suction baffle or internal bend (see Figure 1) 3.8.8 upper sample a sample taken at a level of one-sixth of the depth of liquid below the