1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 25A Meters for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85) STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
2、ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Meters for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85), UL
3、 25A First Edition, Dated July 30, 2014 Summary of Topics This revision of ANSI/UL 25A adds torque requirements for larger size valve. The revisions are substantially in accordance with Proposal(s) on this subject dated August 26, 2016. Text that has been changed in any manner or impacted by ULs ele
4、ctronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of
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6、uding loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pric
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8、any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. OCTOBER 7, 2016 UL 25A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 7, 2016 UL 25A tr2 No Text on This PageU
9、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL July 30, 2014 (Title Page Reprinted: October 7, 2016) 1 UL 25A Standard for Meters for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85) Prior
10、to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Meters for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85), UL 25A. First Edition July 30, 2014 This ANSI/UL Standard
11、for Safety consists of the First Edition including revisions through October 7, 2016. The most recent designation of ANSI/UL 25A as an American National Standard (ANSI) occurred on October 7, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effect
12、ive date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL.
13、Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 25A-2016UL COPYRIGHTED
14、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 21, 2016 UL 25A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 6 2.1 Compone
15、nts .6 2.2 Units of measurement .6 2.3 Undated references .6 3 Glossary .6 CONSTRUCTION 4 General 7 5 Assembly 7 6 Materials .7 6.1 Metallic materials .7 6.2 Nonmetallic materials 10 6.3 Casting impregnation materials 13 6.4 Internal parts .13 6.5 Blending options 13 7 Bodies and Covers .14 8 Regist
16、er-Shaft Seals .14 9 Springs .14 10 Piping and Fittings 15 PERFORMANCE 11 General 16 12 Long Term Exposure Test .17 12.1 General .17 12.2 Samples 17 12.3 Method .18 12.4 Results .18 13 High Pressure Leakage Test .19 14 Endurance Test 19 15 Hydrostatic Strength Test .20 16 Deformation Test .20 17 Tem
17、perature Reduction Test .20A 18 Moist Ammonia-Air Stress Cracking Test 20A 19 Marking Adhesion Test .20B 20 Blending Cycling Test 20B MANUFACTURING AND PRODUCTION 21 General 21 MARKING 22 General 23 23 Permanence of Marking .24 APRIL 21, 2016 UL 25A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
18、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUPPLEMENT SA - Test Fluids SA.1 Details .SA1 JULY 30, 2014 UL 25A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover positive displace
19、ment liquid meters for use with motor fuels. Motor fuels, as dened by these requirements, include one or more of the fuels described in 1.2. 1.2 Meters covered by these requirements are intended for use with one or more of the following as applicable: a) Gasoline formulated in accordance with the St
20、andard Specication for Automotive Spark- Ignition Fuel, ASTM D4814; b) Gasoline/ethanol blends with nominal ethanol concentrations up to 25 percent ethanol (E25), consisting of gasoline formulated in accordance with the Standard Specication for Automotive Spark-Ignition Fuel, ASTM D4814, when blende
21、d with denatured fuel ethanol formulated to be consistent with the Standard Specication for Denatured Fuel Ethanol for Blending With Gasolines For Use as Automotive Spark Ignition Engine Fuel, ASTM D4806; or c) Gasoline/ethanol blends with nominal ethanol concentrations above 25 percent formulated i
22、n accordance with the Standard Specication in (b) above or formulated in accordance with the Standard Specication for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark Ignition Engines, ASTM D5798. 1.3 Meters covered by this standard are for use in accordance with the National Fire Protection A
23、ssociations Flammable and Combustible Liquids Code, ANSI/NFPA 30, and the Code for Motor Fuel Dispensing Facilities and Repair Garages, ANSI/NFPA 30A. 1.4 These requirements do not cover: a) Meters for use with fuels other than as described in 1.2; b) Velocity meters, head meters, or area meters; c)
24、 Meters for use in centralized fuel oil distribution systems; and d) Meter components incorporating electrical circuits except those meeting intrinsically safe or explosion standards. 1.5 Determinations of the suitability of registers, counters, or computers used or provided with these meters, or th
25、e accuracy of measurement resulting from or required in actual application are not within the scope of these requirements. JULY 30, 2014 UL 25A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components 2.1.1 Except as indicat
26、ed in 2.1.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.1.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product co
27、vered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such
28、 components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory
29、 or approximate information. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard the following denitio
30、ns apply. 3.2 BLENDING OPTION Dispensing devices may be provided with an option that blends two specic fuels into one fuel to be dispensed. This blending occurs at the dispenser level and can be in two forms: a) Fixed blending Blending at the dispenser level that blends two specic fuels into one fue
31、l to be dispensed, and that fuel to be dispensed is xed. For example, xed blending includes blend options where gasoline and denatured fuel ethanol can be blended to achieve E85, which is the actual dispensed fuel. b) Variable blending Blending at the dispenser level that blends two specic fuels int
32、o the fuel to be dispensed, but the fuel to be dispensed can be any of a number of previously set points. For example, variable blending includes blend options where gasoline and E85 can be blended to achieve E40, E60, and E85 as the actual dispensed fuel. 3.3 GASOLINE/ETHANOL BLENDS Blended fuels c
33、omposed of a gasoline component and an ethanol component. The numerical value corresponding to the ethanol component determines the blend rating (such as E85 for 85% ethanol, 15% gasoline). JULY 30, 2014 UL 25A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
34、PERMISSION FROM UL 3.4 SEALS, DYNAMIC A seal that is subject to mechanical movement or other applied forces that result in movement or exing of the seal under normal use conditions. 3.5 SEALS, STATIC A seal that is not subject to mechanical movement or other applied forces other than compression for
35、ces that are applied during installation and maintained during normal use conditions. CONSTRUCTION 4 General 4.1 A meter shall be constructed for a minimum working pressure of 345 kPa (50 psig), and an ultimate rupture pressure of not less than ve times the rated working pressure. 4.2 Fluid conning
36、parts, except gaskets and seals, shall be constructed of metallic materials. 4.3 A meter shall be constructed for an operating ambient temperature within the range of minus 29C to 52C (minus 20F to 125F). 5 Assembly 5.1 A meter shall be assembled as a unit and shall include all of the components nec
37、essary for its intended function. 5.2 If a meter requires the use of special pipe anges, gaskets, bolts, or other special ttings or parts for making a proper installation, such parts shall be furnished by the manufacturer with each meter. 5.3 A brazing material used for joining uid-conning parts of
38、a meter shall have a melting point (solidus temperature) exceeding 538C (1000F). 6 Materials 6.1 Metallic materials 6.1.1 General 6.1.1.1 A metallic part, in contact with the fuels anticipated by these requirements, shall be resistant to the action of the fuel if degradation of the material will res
39、ult in leakage of the fuel or if it will impair the function of the device. For all fuel ratings, see Corrosion due to uid, 6.1.2.1. For products rated for gasoline/ethanol blends with nominal ethanol concentrations greater than 25 percent, see Metallic materials system level, 6.1.3. 6.1.1.2 The exp
40、osed surfaces of metallic parts shall be resistant to atmospheric corrosion if this corrosion will lead to leakage of the uid or if it will impair the function of the device. The material shall comply with the requirements in Atmospheric corrosion, 6.1.2.2. JULY 30, 2014 UL 25A 7UL COPYRIGHTED MATER
41、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.1.1.3 Metallic parts in contact with the fuels anticipated by these requirements shall not be constructed of lead, or materials that are substantially lead. In addition, no coatings or platings containing lead s
42、hall be used, such as terne-plated steel. 6.1.2 Metallic materials material level 6.1.2.1 Corrosion due to uid 6.1.2.1.1 All metallic materials used for uid conning parts shall be resistant to corrosion caused by the fuels anticipated by these requirements. In addition, metallic materials, used inte
43、rnally in uid conning parts, that are required to operate in some manner to address safety (e.g. plunger on a valve) shall be resistant to corrosion caused by these fuels. This requirement also applies to all tubing, piping, or other interconnection means between components. Compliance is veried by
44、the Long Term Exposure Test, Section 12. 6.1.2.1.2 A coating or plating, applied to a base metal, shall be resistant to the action of the fuels anticipated by these requirements as determined by the Long Term Exposure Test, Section 12. 6.1.2.2 Atmospheric corrosion 6.1.2.2.1 Metallic materials used
45、for uid conning parts shall be resistant to atmospheric corrosion. In addition, metallic materials that are required to operate to address safety shall be resistant to atmospheric corrosion. Ferrous materials of a thickness specied in the following items are acceptable for the preceding when uncoate
46、d: a) A casting having a wall thickness of not less than 1/4 inch (6.4 mm) if shown by production test to be free of leakage; b) Standard pipe and ttings conforming to the Standard for Welded and Seamless Wrought Steel Pipe, ANSI/ASME B36.10M; and c) Fabricated sheet steel parts having a minimum wal
47、l thickness of 0.093 inch (2.36 mm). 6.1.2.2.2 A protective coating shall provide resistance against atmospheric corrosion to a degree not less than that provided by the protective coatings specied in 6.1.2.2.3. 6.1.2.2.3 Cadmium plating shall not be less than 0.0003 inch (0.008 mm) thick, and zinc
48、plating shall not be less than 0.0005 inch (0.013 mm) thick, except on parts where threads constitute the major portion of the area in which case the cadmium or zinc plating shall not be less than 0.00015 inch (0.0038 mm) thick. Metallic parts are considered to comply with 6.1.2.2 when they are prot
49、ected against atmospheric corrosion by: a) Hot dipped, mill galvanized sheet steel complying with the coating designation G90 in Table I of the Specication for Sheet Steel, Zinc Coated (Galvanized) or Zinc-Iron-Alloy Coated (Galvannealed) by the Hot Dip Process, ASTM A653/A653M, or b) Coatings which have been determined to be equivalent to G90 under the requirements of the Standard for Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment, UL 1332. JULY 30, 2
