UL 25B-2014 UL Standard for Safety Meters for Diesel Fuel Biodiesel Fuel Diesel Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20) Kerosene and Fuel Oil .pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 25B Meters for Diesel Fuel, Biodiesel Fuel, Diesel/ Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel OilUL COPYRIGHTED MATERIAL NOT AUTHORIZE

2、D FOR FURTHER REPRODUCTION 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 Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrat

3、ions up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 25B First Edition, Dated July 30, 2014 Summary of Topics This revision of ANSI/UL 25B revises material requirements for static seals. The revised requirements are substantially in accordance with Proposal(s) on this subject dated November 7, 20

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8、tronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for r

9、equirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. JANUARY 21, 2015 UL 25B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY

10、 21, 2015 UL 25B tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL July 30, 2014 (Title Page Reprinted: January 21, 2015) 1 UL 25B Meters for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel C

11、oncentrations up to 20 Percent (B20), Kerosene, and Fuel Oil Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Meters for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up

12、 to 20 Percent (B20), Kerosene, and Fuel Oil, UL 25B. First Edition July 30, 2014 This ANSI/UL Standard for Safety consists of the First Edition including revisions through January 21, 2015. The most recent designation of ANSI/UL 25B as an American National Standard (ANSI) occurred on January 21, 20

13、15. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective 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 Coll

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15、nd exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 25B-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 30, 2014 UL 25B 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC

16、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 6 2.1 Components .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 .9 6.3 Casting i

17、mpregnation materials 10A 6.4 Internal parts 10B 7 Bodies and Covers .12 8 Register-Shaft Seals .12 9 Springs .12 10 Piping and Fittings 12 PERFORMANCE 11 General 14 12 Long Term Exposure Test .15 12.1 General .15 12.2 Samples 15 12.3 Method .15 12.4 Results .16 13 High Pressure Leakage Test .16 14

18、Endurance Test 17 15 Hydrostatic Strength Test .17 16 Deformation Test .18 17 Temperature Reduction Test 18 18 10-Day Moist Ammonia-Air Stress Cracking Test 19 19 Marking Adhesion Test 19 MANUFACTURING AND PRODUCTION 20 General 20 MARKING 21 General 20 22 Permanence of Marking .21 JULY 30, 2014 UL 2

19、5B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUPPLEMENT SA - Test Fluids SA.1 Representative aggressive combustible test fuel mixtures SA1 JULY 30, 2014 UL 25B 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRI

20、BUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover positive displacement 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

21、use with one or more of the following as applicable: a) Diesel fuel and diesel/biodiesel blends with nominal biodiesel concentrations up to 5 percent (B0-B5) formulated in accordance with the Standard Specication for Diesel Fuel Oils, ASTM D975; b) Diesel/biodiesel blends with nominal biodiesel conc

22、entrations from 5 percent up to 20 percent (B6 B20) formulated in accordance with the Standard Specication for Diesel Fuel Oil, Biodiesel Blends (B6 B20), ASTM D7467; c) Biodiesel (B99.9/B100) formulated in accordance with the Standard Specication for Biodiesel Fuel Blend Stock (B100) for Middle Dis

23、tillate Fuels, ASTM D6751; d) Kerosene formulated in accordance with the Standard Specication for Kerosine, ANSI/ ASTM D3699; or e) Fuel oil (heating oil) formulated in accordance with the Standard Specication for Fuel Oils, ASTM D396. 1.3 Meters covered by this standard are for use in accordance wi

24、th the National Fire Protection Associations 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

25、, head meters, or area meters; c) 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

26、provided with these meters, or the accuracy of measurement resulting from or required in actual application are not within the scope of these requirements. JULY 30, 2014 UL 25B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 C

27、omponents 2.1.1 Except as indicated 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 o

28、f the component in the product covered 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

29、in performance capabilities. Such 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. Valu

30、es in parentheses are explanatory 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 th

31、is standard the following denitions apply. 3.2 DIESEL/BIODIESEL BLENDS Blended fuels composed of a diesel component and a biodiesel component. The numerical value corresponding to the biodiesel component determines the blend rating (such as B20 for 20% biodiesel, 80% diesel). 3.3 SEALS, DYNAMIC A se

32、al that is subject to mechanical movement or other applied forces that result in movement or exing of the seal under normal use conditions. 3.4 SEALS, STATIC A seal that is not subject to mechanical movement or other applied forces other than compression forces that are applied during installation a

33、nd maintained during normal use conditions. JULY 30, 2014 UL 25B 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 4 General 4.1 A meter shall be constructed for a minimum working pressure of 345 kPa (50 psig), and an ultimate ru

34、pture pressure of not less than ve times the rated working pressure. 4.2 Fluid conning 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 Assemb

35、ly 5.1 A meter shall be assembled as a unit and shall include all of the components necessary 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 manu

36、facturer with each meter. 5.3 A brazing material used for joining uid-conning parts of 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 requirement

37、s, shall be resistant to the action of the fuel if degradation of the material will result in leakage of the fuel or if it will impair the function of the device. See the Long Term Exposure Test, Section 12. 6.1.1.2 The exposed surfaces of metallic parts shall be resistant to atmospheric corrosion i

38、f 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. 6.1.1.3 Metallic parts in contact with the fuels anticipated by these requirements shall not be constructed of lead, or m

39、aterials that are substantially lead. In addition, no coatings or platings containing lead shall be used, such as terne-plated steel. 6.1.1.4 With reference to the above requirements, metallic parts include metallic materials used to form uid conning parts as well as metallic coatings or plating tha

40、t may be applied to a base material. JULY 30, 2014 UL 25B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.1.2 Atmospheric corrosion 6.1.2.1 Metallic materials used for uid conning parts shall be resistant to atmospheric corrosion. In addi

41、tion, 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 uncoated: a) A casting having a wall thickness of not less than 1/4 inch (6.4 mm)

42、 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 wall thickness of 0.093 inch (2.36 mm). 6.1.2.2 A protective coating shall pr

43、ovide resistance against atmospheric corrosion to a degree not less than that provided by the protective coatings specied in 6.1.2.3. 6.1.2.3 Cadmium plating shall not be less than 0.0003 inch (0.008 mm) thick, and zinc plating shall not be less than 0.0005 inch (0.013 mm) thick, except on parts whe

44、re 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 6.1.2.1 when they are protected against atmospheric corrosion by: a) Hot dipped, mill galvanized sheet ste

45、el 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 Stan

46、dard for Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment, UL 1332. 6.1.2.2.4 A metallic material other than as described in 6.1.2.1 6.1.2.3 shall be painted or protected in a manner that has been determined to be equivalent. JULY 30, 2014 UL 25B 8UL COPYRIGHTED MATERIAL NO

47、T AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.2 Nonmetallic materials 6.2.1 General 6.2.1.1 A nonmetallic 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 result in

48、leakage of the fuel, or if it will impair the function of the device. 6.2.1.2 Gaskets or seals shall be designated as dynamic and/or static seals. See 3.3 and 3.4 respectively. If the type of seal cannot be determined, then the material shall be treated as both a static and a dynamic seal. 6.2.1.3 G

49、askets and seals shall comply with the requirements as outlined in Nonmetallic materials material level, 6.2.2, and Nonmetallic materials system level, 6.2.3. 6.2.1.4 Nonmetallic materials in contact with the fuels anticipated by these requirements shall not be constructed of the following: a) Polysulde rubber; b) Ethylene propylene diene monomer (EPDM) rubber; c) Methyl-Methacrylate; d) Polyvinyl Chloride (PVC); e) Nylon 6/6; or f) Polyurethane. 6.2.2 Nonmetallic materials materia