CAN CGSB-3 0 NO 18 5-2015 Methods of testing petroleum and associated products Test for ethyl mercaptan odorant in propane field method.pdf

1、 CAN/CGSB-3.0 No. 18.5-2015Supersedes CAN/CGSB-3.0 No.18.5-2006Methods of testing petroleum and associated productsTest for ethyl mercaptan odorant in propane, field methodICS 71.040.40National Standard of CanadaThe CANADIAN GENERAL STANDARDS BOARD (CGSB), under whose auspices this standard has been

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24、ongctpsgc-pwgsc.gc.ca on the Web www.tpsgc-pwgsc.gc.ca/ongc-cgsb NATIONAL STANDARD OF CANADA CAN/CGSB-3.0 No. 18.5-2015Supersedes CAN/CGSB-3.0 No. 18.5-2006Methods of testing petroleum and associated productsTest for ethyl mercaptan odorant in propane, field methodPrepared by the Approved by theCana

25、dian General Standards BoardPublished August 2015 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 HER MAJESTY THE QUEEN IN RIGHT OF CANADA, as represented by the Minister of Public Works and Government Services, the Minister responsible for the Canadian General Standards Board (2015

26、). No part of this publication may be reproduced in any form without the prior permission of the publisher.CETTE NORME NATIONALE DU CANADA EST DISPONIBLE EN VERSIONSFRANAISE ET ANGLAISE.CAN/CGSB-3.0 No. 18.5-2015CANADIAN GENERAL STANDARDS BOARDCommittee on Petroleum Test Methods(Voting membership at

27、 date of approval)ChairWispinski, D.1Alberta Innovates Technology Futures General interest categoryChabot, D. Canadian Coast GuardMacLean, G. Intertek Commodities DivisionMnard, L. Advanced Engine Technology Ltd.Pickard, A. ConsultantMarotta, L. PerkinElmerProducer categoryGupta, R. Husky EnergyLach

28、ine, J. Imperial Oil Ltd.Learn, R. Suncor Energy Products PartnershipPierceall, R. Archer Daniels MidlandPorter, S. Canadian Renewable Fuels Association White, M. North AtlanticYoung, R. Shell Canada Ltd.Regulator categoryTardif, M. Environment CanadaUser categoryArboleda, P. Natural Resources Canad

29、aGaudet, N. National Defence (QETE)Hanganu, A. Inspectorate CanadaHaymour, W. Maxxam Analytics Inc.Moser, P. Saskatchewan Research CouncilOBreham, G. SGS Canada Inc.Vidian-Jones, C. Certispec Services Inc.Secretary (non-voting)Lozano, A. Canadian General Standards Board1UserAcknowledgment is made fo

30、r the translation of this National Standard of Canada by the Translation Bureau of Public Works and Government Services Canada. CGSB 2015 All rights reservedCAN/CGSB-3.0 No. 18.5-2015i CGSB 2015 All rights reservedContents1 Scope . 12 Normative references . 13 Summary of test method . 24 Significanc

31、e and use 25 Safety precautions . 26 Apparatus and materials 27 Procedure 37.3 Procedure A Flowing propane gas stream analysis . 37.4 Procedure B Analysis of propane in a plastic bag (“BAGGIE” method) 58 Calculation 79 Report 710 Precision . 711 Notes 7Annex A (informative) Propane odorant stain tub

32、e test/Data sheet . 10Page1CAN/CGSB-3.0 No. 18.5-2015Supersedes CAN/CGSB-3.0 No.18.5-2006 CGSB 2015 All rights reservedMethods of testing petroleum and associated productsTest for ethyl mercaptan odorant in propane, field method1 ScopeThis method is intended for the semi-quantitative determination o

33、f ethyl mercaptan odorant (within the range of 5 to 48 mg/L) in liquid propane in order to confirm that recently stenched propane is odorized to the required level. Two procedures are given which are intended for field application and may be suitable for use by non-laboratory personnel after suitabl

34、e training. A gas chromatographic method should be used for more precise, quantitative determination of ethyl mercaptan in propane. Other low molecular weight mercaptans, such as methyl mercaptan, can interfere by giving a positive result.The primary stain tube described in this method is suitable f

35、or Grade 1 propane but is not suitable for Grade 2 (commercial) propane, which normally contains more than 5% propylene by volume.The testing and evaluation of a product against this method require the use of materials and/or equipment that could be hazardous. This document does not purport to addre

36、ss all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use.2 Normative referencesThe fol

37、lowing normative documents contain provisions that, through reference in this text, constitute provisions of this method. The referenced documents may be obtained from the sources noted below.NOTE The addresses provided below were valid at the date of publication of this method.An undated reference

38、is to the latest edition or revision of the reference or document in question, unless otherwise specified by the authority applying this method. A dated reference is to the specified revision or edition of the reference or document in question. 2.1 Canadian General Standards Board (CGSB)CAN/CGSB-3.1

39、4 Propane for fuel purposes.2.1.1 SourceThe above may be obtained from the Canadian General Standards Board, Sales Centre, Gatineau, Canada K1A 1G6. Telephone 819-956-0425 or 1-800-665-2472. Fax 819-956-5740. E-mail ncr.cgsb-ongctpsgc-pwgsc.gc.ca. Web site www.tpsgc-pwgsc.gc.ca/ongc-cgsb.2.2 Canadia

40、n Standards Association (CSA)CAN/CSA-B149.2 Propane storage and handling code.2.2.1 SourceThe above may be obtained from the Canadian Standards Association, Standards Sales, 5060 Spectrum Way, Suite 100, Mississauga, Ontario L4W 5N6. Telephone 416-747-4044 or 1-800-463-6727. Fax 416-747-2510. E-mail

41、 salescsa.ca. Web site www.csa.ca.2CAN/CGSB-3.0 No. 18.5-2015 CGSB 2015 All rights reserved2.3 ASTM InternationalD1265 Standard practice for sampling liquefied petroleum (LP) gases (Manual method)D5305 Standard test method for determination of ethyl mercaptan in LPGas vaporE29 Standard practice for

42、using significant digits in test data to determine conformance with specifications.2.3.1 SourceThe above may be obtained from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, U.S.A., telephone 610-832-9585, fax 610-832-9555, Web site www.astm.org, or from IHS Global Canad

43、a Ltd., 200-1331 MacLeod Trail SE, Calgary, Alberta T2G 0K3, telephone 613-237-4250 or 1-800-267-8220, fax 613-237-4251,Web site .3 Summary of test methodA representative sample of liquid propane is completely vaporized by one of two procedures (a flowing stream of gaseous propane or evaporation of

44、a sample in a plastic bag) and then tested for odorant concentration by use of a hand-held tester that utilizes a detector tube (stain tube) specific for ethyl mercaptan.4 Significance and usePropane, a colourless, odourless gas, is intentionally treated with an odorant, ethyl mercaptan for detectin

45、g propane leaks. However, the concentration of ethyl mercaptan in propane may decrease (fade) over time because of adsorption on metal surfaces and oxidation, leading to odorant depletion. Therefore, a field test is required to confirm the concentration of odorant in recently stenched propane and to

46、 allow determination of ethyl mercaptan in propane in the distribution system.5 Safety precautions5.1 Note the extreme flammability of propane and ensure that this test is performed in a well-ventilated area, free of ignition sources.5.2 Liquid propane evaporates rapidly and can readily freeze flesh

47、. Avoid skin contact. 6 Apparatus and materials6.1 Gastec precision gas sampling pump: GV-100 or GV-100S or equivalent, incorporating a “test complete” indicator. 6.2 Gastec ethyl mercaptan detector tube: No. 72 calibrated over the range of 0.5 to 120 mL/m3, or equivalent.6.3 Sample container: (i.e.

48、 pressure cylinder), suitable for collecting and holding liquid propane, and conditioned by prior exposure to propane odorized with expected levels of ethyl mercaptan to minimize adsorption of ethyl mercaptan from the sample. A sample cylinder of at least 500 mL capacity is required for Procedure A.

49、 The following sample cylinders (with outage tube and resettable pressure-relief safety valve with monel spring) have been found to be suitable:1 footnote placeholder so note numbering continues from section 1CAN/CGSB-3.0 No. 18.5-20153 CGSB 2015 All rights reserved6.3.1 Silcosteel-treated, Sulfinert-treated2or Teflon-lined stainless steel pressure cylinders.6.3.2. 316 stainless steel pressure cylinders dedicated to stenched propane service. 6.3.2.1 Initial commissioning of new or cleaned/reconditioned