UL 842B-2015 UL Standard for Safety Valves for Diesel Fuel Biodiesel Fuel Diesel Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20) Kerosene and Fuel Oil_1.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 842B Valves for Diesel Fuel, Biodiesel Fuel, Diesel/ Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel OilUL COPYRIGHTED MATERIAL NOT AUTHORIZ

2、ED 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 Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentra

3、tions up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 842B First Edition, Dated February 18, 2015 Summary of Topics This rst edition of the Standard for Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel

4、 Oil, ANSI/UL 842B, covers valves that are intended to be used for the control of uids and their vapors. They are of the type commonly used in piping systems and in the assembly of motor fuel dispensing equipment. The requirements are substantially in accordance with Proposal(s) on this subject date

5、d October 17, 2014. 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 UL. UL provides this Standard as is without warranty

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9、 storing an electronic 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

10、prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. FEBRUARY 18, 2015 UL 842B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSI

11、ON FROM UL FEBRUARY 18, 2015 UL 842B tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL February 18, 2015 1 UL 842B Standard for Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Conc

12、entrations 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 Valves for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to

13、 20 Percent (B20), Kerosene, and Fuel Oil, UL 842B. First Edition February 18, 2015 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 842B as an American National Standard (ANSI) occurred on February 18, 2015. ANSI approval for a standard does not

14、 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 Collaborative Standards Development System (C

15、SDS) at http:/. ULs Standards for Safety are copyrighted by UL. 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 20

16、15 UNDERWRITERS LABORATORIES INC. ANSI/UL 842B-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 18, 2015 UL 842B 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMIS

17、SION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 6 2.1 Components .6 2.2 Units of measurement .7 2.3 Undated references .7 3 Glossary .7 CONSTRUCTION 4 Assembly 8 4.1 All valves 8 4.2 Shutoff valves 8 5 Materials .9 5.1 Metallic materials .9 5.2 Nonmetallic materials 10 5.3 Casting impregnati

18、on materials 13 5.4 Internal parts .13 6 Bodies and Covers .13 7 Seals and Stuffing Boxes .14 8 Diaphragms .15 9 Springs .15 10 Operating Mechanisms 15 PERFORMANCE 11 General 16 12 Long Term Exposure Test .17 12.1 General .17 12.2 Samples 17 12.3 Method .17 12.4 Results .18 13 Deformation Test .18 1

19、4 External Leakage Test 19 15 Fire Test .20 16 Weak Section Strength Test .22 17 Endurance Test 22 18 Endurance Test Mechanical Line Leak Detectors .23 19 Hydrostatic Strength Test 23 20 Moist Ammonia-Air Stress Cracking Test 23 21 Marking Adhesion Test 24 MANUFACTURING AND PRODUCTION 22 General 24

20、INSTALLATION INSTRUCTIONS 23 General 25 FEBRUARY 18, 2015 UL 842B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARKING 24 General 25 SUPPLEMENT SA - Test Fluids SA.1 Representative aggressive combustible test fuel mixtures SA1 FEBRUARY 1

21、8, 2015 UL 842B 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover valves that are intended to be used for the control of uids and their vapors for the uids indicated in 1.2. They are of the ty

22、pe commonly used in piping systems and in the assembly of motor fuel dispensing equipment. Valves covered by this standard are for use with ammable uids which are handled at temperatures normally within the range of minus 29C (minus 20F) to 52C (125F). 1.2 Valves covered by these requirements are in

23、tended for 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 bi

24、odiesel concentrations 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) fo

25、r Middle Distillate 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 These requirements cover valves of the manually

26、operated, pressure operated, or temperature operated types, or combinations of such to the exclusion of types operated wholly or partially by electricity. When they form a part of an assembly which provides for additional functions or service, the requirements are outside the scope of these requirem

27、ents. 1.4 These requirements do not cover the following: a) Valves for handling liquids under cryogenic conditions. b) Valves for general renery service, offshore and pipe line terminals, natural gas processing plants, gas distribution systems, petrochemical processing facilities, or the like. c) Co

28、nstant-level oil valves and electrically operated valves. d) Relief valves and pressure regulators for liqueed petroleum gas (LP-Gas) service. e) Shutoff, emergency shutoff and check valves for liqueed petroleum gas (LP-Gas) in the liquid phase. f) Manually operated gas valves of the plug and body o

29、r rotating disc type which are evaluated under the Standard for Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves, ANSI Z21.15. FEBRUARY 18, 2015 UL 842B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM

30、 UL g) Valves covered by the Standard for Gas Appliance Pressure Regulators, ANSI Z21.18; the Standard for Automatic Valves for Gas Appliances, ANSI Z21.21; or the Standard for Gas Appliance Thermostats, ANSI Z21.23. h) Hose nozzles. i) Valves covered by the Standard for Manually Operated Metallic G

31、as Valves for Use in Gas Piping Systems up to 125 PSI (Sizes NPS 1/2 through NPS 2), ANSI/ASME B16.33 and Manually Operated Metallic Gas Valves for Use in Aboveground Piping Systems up to 5 PSI, ANSI/ASME B16.44. j) Manually operated valves for LP-Gas, which are covered under the Standard for Valves

32、 for Flammable Fluids, UL 842. k) Valves intended for use with gasoline or gasoline/ethanol blends, which are covered under the Standard for Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85), UL 842A. 2 General 2.1 Components 2.1.1 Except a

33、s 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 of the component in the p

34、roduct 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 in performance capabilit

35、ies. 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. FEBRUARY 18, 2015 UL 842B 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT

36、 PERMISSION FROM UL 2.2 Units of measurement 3.2.1 When a value for measurement is followed by a value in other units in parentheses, the rst stated value is the requirement. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall

37、 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 denitions apply. 3.2 DIESEL/BIODIESEL BLENDS Blended fuels composed of a diesel component and a biodiesel component. The numerical value corresponding to the bi

38、odiesel component determines the blend rating (such as B20 for 20 percent biodiesel, 80 percent diesel). 3.3 EMERGENCY SHUTOFF VALVES Valves intended for installation at the inlet of remote control type ammable liquid dispensing devices. They are normally held open by a mechanical holding means. The

39、y incorporate a fusible element and close automatically in the event of exposure to re or break-off resulting from severe impact. They are designed for an operating pressure of not less than 50 psi (345 kPa). 3.4 FUSIBLE LINK VALVES Valves intended for use in lines conveying fuel gas or fuel oil whi

40、ch function to close when the temperature in the vicinity of the valve exceeds the fusing temperature of the fusible element. 3.5 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. 3.6 SEALS,

41、STATIC A seal that is not subject to mechanical movement or other applied forces other than compressing forces that are applied during installation and maintained during normal use conditions. FEBRUARY 18, 2015 UL 842B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION

42、WITHOUT PERMISSION FROM UL CONSTRUCTION 4 Assembly 4.1 All valves 4.1.1 A valve shall include all of the components required for its intended function and installation. 4.1.2 When a valve requires the use of special pipe anges, gaskets, bolts, or other special ttings or parts for making an installat

43、ion, such parts shall be furnished by the manufacturer with each valve. 4.1.3 Two or more subassemblies intended to be assembled in the eld as a unit shall be capable of being joined together without requiring any of the subassemblies to be cut, drilled, welded or otherwise altered. 4.1.4 When two o

44、r more valves or actuating devices, or both, are to be used together as one unit, the entire assembly is, for the purpose of these requirements, to be considered and tested as one valve. 4.1.5 A seat disc shall be attached to its poppet or holder or otherwise assembled so as to prevent it from becom

45、ing dislocated under service conditions as determined by the Endurance Test, Section 17. The means to secure the disc shall not rely upon cement or adhesive. 4.1.6 A brazing material used for joining liquid conning parts of a valve shall have a melting point (solidus temperature) of minimum 538C (10

46、00F). 4.1.7 A valve with socket or butt weld ends shall be capable of being installed without damaging nonmetallic seats or seals. Required instructions for accomplishing this shall accompany each valve. 4.2 Shutoff valves 4.2.1 A shutoff valve shall not be equipped with a bypass or with a means to

47、prevent it from closing completely. 4.2.2 The requirement in 4.2.1 does not apply to a feature provided to permit a take-off to recirculate uid or to supply a pilot or other individually controlled outlet. 4.2.3 The appropriate operating positions or the direction of movement shall be clearly indica

48、ted for a manual operating lever or reset handle included in a nonself-closing type valve. 4.2.4 An automatic shutoff valve shall function as a shutoff regardless of the position of any damper or external operating lever or any reset device. The manipulation of a manual-reset device shall not cause

49、the valve to function as an automatic-reset valve. 4.2.5 An automatic shutoff valve shall not be equipped with means for manually latching the valve in the open position in a manner which prevents the valve from functioning as a shutoff. FEBRUARY 18, 2015 UL 842B 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.6 An automatic shutoff mechanism shall be guarded to prevent interference with the intended operation of the