1、Governmentof CanadaCanadian GeneralStandards BoardExperience and excellenceExprience et excellenceGouvernementdu CanadaOffice des normesgnrales du Canada CAN/CGSB-3.0 No. 140.1-2005 Supersedes CAN/CGSB-3.0 No. 140.1-95 Methods of Testing Petroleum and Associated Products Low Temperature Flow Test (L
2、TFT) for Diesel Fuels ICS 71.040.50 National Standard of Canada Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The CANADIAN GENERAL STANDARDS BOARD (CGSB), The STANDARDS COUNCIL OF C
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16、ated in its Scope, it is important to note that it remains theK1P 6N7responsibility of the users of the standard to judge its suitabilityfor their particular purpose.The testing and evaluation of a product against this standard mayrequire the use of materials and/or equipment that could behazardous.
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22、.0 No. 140.1-95 METHODS OF TESTING PETROLEUM AND ASSOCIATED PRODUCTS LOW TEMPERATURE FLOW TEST (LTFT) FOR DIESEL FUELS Prepared by the Approved by the Canadian General Standards Board Standards Council of Canada Published July 2005 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 HER
23、 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 Boad, (2005) No part of this publication may be reproduced in any form without the prior permission of the publisher. Copyright Ca
24、nadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Acknowledgment is made for the translation of this National Standard of Canada by the Translation Bureau of Public Works and Government Services Ca
25、nada. CAN/CGSB-3.0 No. 140.1-2005 CANADIAN GENERAL STANDARDS BOARD COMMITTEE ON PETROLEUM TEST METHODS (Membership at date of approval) Wispinski, D. Chairperson Alberta Research Council Gaudet, N. National Defence Jacula, T. Maxxam Analytics Inc. Lee, S.W. Natural Resources Canada McRae, M. Canadia
26、n Redwood Management Mathoney, B.J. Imperial Oil, Products and Chemicals Division Melnyk, S. Shell Canada Products Pickard, A.L. Consultant Porter, S. Suncor Energy Products Inc. Purificati, D. Petro-Canada Samiullah, M. Sentinel Canada Tharby, R.D. Tharby Technology, Consultants Turle, R. Environme
27、nt Canada Newman, M. Secretary Canadian General Standards Board Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 National Standard of Canada METHODS OF TESTING PETROLEUM AND ASSOCIAT
28、ED PRODUCTS CAN/CGSB-3.0 Gatineau Canada K1A 1G6 Low Temperature Flow Test (LTFT) for Diesel Fuels No. 140.1-2005 Supersedes CAN/CGSB-3.0 No. 140.1-95 1. SCOPE 1.1 This method describes a procedure for determining the filter plugging tendency of diesel fuels at low temperature usually due to the for
29、mation of wax crystals (see Note after par. 6.1). 1.2 The method applies to all distillate diesel fuels. Fuels passing this test are expected to provide satisfactory fuel flow in automotive equipment at temperatures equal to or higher than that of the test. 1.3 This method is referenced and compared
30、 in ASTM D 4539. 1.4 The testing and evaluation of a product against this method may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this method has the responsibility to con
31、sult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use. 2. REFERENCED PUBLICATIONS 2.1 The following publications are referenced in this method: 2.1.1 Canadian General Standards Board (CGSB
32、) CAN/CGSB-3.0 Methods of Testing Petroleum and Associated Products: No. 0 Prologue to the Petroleum Test Methods and Table of Contents. 2.1.2 ASTM International D 341 Standard Viscosity Temperature Charts for Liquid Petroleum Products D 2500 Standard Test Method for Cloud Point of Petroleum Product
33、s D 3117 Standard Test Method for Wax Appearance Point of Distillate Fuels D 4539 Standard Test Method for Filterability of Diesel Fuels by Low-Temperature Flow Test (LTFT) D 5771 Standard Test Method for Cloud Point of Petroleum Products (Optical Detection Stepped Cooling Method) D 5772 Standard Te
34、st Method for Cloud Point of Petroleum Products (Linear Cooling Rate Method) D 5773 Standard Test Method for Cloud Point of Petroleum Products (Constant Cooling Rate Method). 2.1.3 Coordinating Research Council (CRC) Report 528 Diesel Fuel Low-Temperature Operability Field Test. 2.2 A dated referenc
35、e in this method is to the issue specified. An undated reference in this method is to the latest issue, unless otherwise specified by the authority applying this method. The sources are given in the Notes section. Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot
36、for ResaleNo reproduction or networking permitted without license from IHS-,-,-2 No. 140.1-2005 3. SUMMARY OF METHOD 3.1 The temperature of a series of 200 mL samples of test fuel is gradually lowered to the desired testing temperature at a controlled cooling rate of 1C/h. At 1C intervals, a sample
37、from the series is filtered through a 17 G28m screen at 20 kPa gauge vacuum. 3.1.1 This procedure is repeated until a sample from the series does not pass the test. The minimum pass temperature is the lowest temperature, expressed as a multiple of 1C, at which a minimum 180 mL of sample, when cooled
38、 under the prescribed conditions, can be filtered in 60 s or less. 3.2 Alternatively, a single sample may be cooled as described in par. 3.1 and tested at a specified temperature to determine if it passes or fails at that temperature. 4. SIGNIFICANCE AND USE 4.1 The Low Temperature Flow Test helps e
39、valuate the filterability of diesel fuels at low temperatures where wax plugging of diesel fuel systems can restrict the operation of automotive equipment. Fuels passing this test usually provide satisfactory flow performance at temperatures equal to or higher than the minimum LTFT temperature (refe
40、r to CRC Report No. 528). The test method is especially useful for evaluating fuels containing flow improver additives. 4.2 This test can be used as a measure of the flow performance of diesel fuels at low temperatures by petroleum refiners, marketers, distributors, consumers, and others concerned w
41、ith tailoring and handling diesel fuels for automotive use. 5. APPARATUS 5.1 Glass Bottles Several clear, heat-resistant, wide-mouthed bottles or tall form beakers having 240 to 300 mL capacity and 50 to 60 mm I.D. 5.2 Filtration Assembly as shown in Figure 1. 5.3 Filter as shown in Figure 2. The wi
42、re filter screen1(fine wire mesh cloth, 304 SS sintered screen) is a twill Dutch weave mesh with a nominal filtration rating of 17 G28m. The mesh is 65 wires/cm (165 wires/in.) by 303 to 315 wires/cm (770 to 800 wires/in.). The wire strands have diameters of 0.0071 cm (0.0028 in.) and 0.0046 cm (0.0
43、018 in.), respectively. The nominal filtration rating indicates a 98% removal by mass of all particles equal to or greater than 17 m. 5.4 Temperature Measuring Device Thermometer (type 114C for air baths or type 5C for liquid baths) calibrated under total immersion conditions, spanning the temperatu
44、re range of the test and calibrated in at least 0.5C increments, or a thermocouple or RTD thermister. 5.5 Cooling Bath capable of cooling multiple samples to the required temperature, in a controlled manner of 1.0 0.1C/h with a maximum deviation of 0.5C from the ramp, using either refrigerated air o
45、r liquid. The size and shape of the bath are optional. In an air bath, the air should circulate around all sides of the test jar, and the jar should sit on an insulating disk. When immersed in a liquid coolant, the top of the test jar should be at or below the liquid coolant level, the jar should no
46、t touch the sides of the well, and it should sit on an insulating disk. A lid or cover should be placed over the bottles during the cooling to prevent condensation. _ 1Bulk filter screen material not verified according to Appendix A is available in sheets from Pall Canada Limited, 7205 Millcreek Dri
47、ve, Mississauga, Ontario L5N 3R3, telephone (905) 542-0330. The catalogue description is: Rigimesh Sintered Woven Wire Mesh, Grade M, 304 SS. Suitable wire filter screens (17 m, 16 mm O.D.) verified according to Appendix A are available from the Alberta Research Council, Fuels & Lubricants Group, 25
48、0 Karl Clark Road, Edmonton, Alberta, Canada T6N 1E4, telephone (780) 450-5108, fax (780) 988-9053, Web site www.arc.ab.ca. Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-No. 140.1-2
49、005 3 5.6 Stop Watch or Electric Timer capable of measuring tenths of a second. 5.7 Vacuum System capable of maintaining a constant vacuum of 20 0.2 kPa gauge (150 1.5 mm Hg) and containing a surge tank with a minimum volume of 4 L. 6. PROCEDURE 6.1 Filter a fresh sample of test fuel (CAUTION: combustible liquid.) through dry, lintless filter paper, at 15C or higher, to remove any foreign mater
