UL 842A-2015 UL Standard for Safety Valves for Gasoline and Gasoline Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 C E85) (First Edition Reprint with revi.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 842A Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUT

2、ION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85), UL 842A First Edition, Da

3、ted February 18, 2015 Summary of Topics This rst edition of the Standard for Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85), ANSI/UL 842A, covers valves that are intended to be used for the control of uids and their vapors. They are of t

4、he 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 dated October 17, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system,

5、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 of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or

6、tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including 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 repr

7、esentative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmle

8、ss from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect

9、, 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 requirements that have been revised and that have a future effective date are located after the Standar

10、d, and are preceded by a SUPERSEDED REQUIREMENTS notice. FEBRUARY 18, 2015 UL 842A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 18, 2015 UL 842A tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD

11、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL February 18, 2015 1 UL 842A Standard for Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85) Prior to the rst edition, the requirements for the products covered by this standard were included

12、in the Outline of Investigation for Valves for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 E85), UL 842A. First Edition February 18, 2015 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 842A as a

13、n American National Standard (ANSI) occurred on February 18, 2015. 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

14、 should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) 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, ownership

15、s, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 842A-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 18, 2015 UL 842A 2 No Text on

16、 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 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 Shuto

17、ff valves 8 5 Materials .9 5.1 Metallic materials .9 5.2 Nonmetallic materials 12 5.3 Casting impregnation materials 14 5.4 Internal parts .14 5.5 Blending options 15 6 Bodies and Covers .15 7 Seals and Stuffing Boxes .16 8 Diaphragms .16 9 Springs .17 10 Operating Mechanisms 17 PERFORMANCE 11 Gener

18、al 17 12 Long Term Exposure Test .18 12.1 General .18 12.2 Samples 18 12.3 Method .19 12.4 Results .20 13 Deformation Test .20 14 External Leakage Test 21 15 Fire Test 22 16 Weak Section Strength Test .25 17 Endurance Test 25 18 Endurance Test Mechanical Line Leak Detectors .26 19 Hydrostatic Streng

19、th Test 26 20 Moist Ammonia-Air Stress Cracking Test 26 21 Marking Adhesion Test 27 22 Blending Cycling Test .27 MANUFACTURING AND PRODUCTION 23 General 28 INSTALLATION INSTRUCTIONS FEBRUARY 18, 2015 UL 842A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER

20、MISSION FROM UL 24 General 28 MARKING 25 General 28 SUPPLEMENT SA - Test Fluids SA.1 Details .SA1 FEBRUARY 18, 2015 UL 842A 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 in

21、tended to be used for the control of uids and their vapors for the uids indicated in 1.2. They are of the type 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 norma

22、lly within the range of minus 29C (minus 20F) to 52C (125F). 1.2 Valves covered by these requirements are intended for use with one or more of the following as applicable: a) Gasoline formulated in accordance with the Standard Specication for Automotive Spark- Ignition Fuel, ASTM D4814; b) Gasoline/

23、ethanol blends with nominal ethanol concentrations up to 25% ethanol (E25), consisting of gasoline formulated in accordance with the Standard Specication for Automotive Spark-Ignition Fuel, ASTM D4814, when blended with denatured fuel ethanol formulated to be consistent with the Standard Specication

24、 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% formulated in accordance with the Standard Specication in item (b) or formulated in accordance with the St

25、andard Specication for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines, ASTM D5798. 1.3 These requirements cover valves of the manually operated, pressure operated, or temperature operated types, or combinations of such to the exclusion of types operated wholly or partially b

26、y electricity. When they form a part of an assembly which provides for additional functions or service, the requirements are outside the scope of these requirements. 1.4 These requirements do not cover the following: a) Valves for handling liquids under cryogenic conditions; b) Valves for general re

27、nery service, offshore and pipe line terminals, natural gas processing plants, gas distribution systems, petrochemical processing facilities, or the like; c) Constant-level oil valves and electrically operated valves; d) Relief valves and pressure regulators for liqueed petroleum gas (LP-Gas) servic

28、e; 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 or rotating disc type which are evaluated under the Standard for Manually Operated Gas Valves for Appliances, Appliance Connector Valves and

29、Hose End Valves, ANSI Z21.15; 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; FEBRUARY 18, 2015 UL 842A 5UL COPYRIGHTED MATERIAL NOT AU

30、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL h) Hose nozzles; i) Valves covered by the Standard for Manually Operated Metallic Gas 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 Val

31、ves for Use in Aboveground Piping Systems up to 5 PSI, ANSI/ASME B16.44; j) Manually operated valves for diesel fuel, biodiesel fuel, diesel/biodiesel blends, kerosene, or fuel oil, which are covered under the Standard for Valves for Diesel Fuel, Biodiesel Fuel, Diesel/ Biodiesel Blends with Nominal

32、 Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 842B; k) Manually operated valves for LP-Gas, which are covered under the Standard for Valves for Flammable Fluids, UL 842. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by th

33、is 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 covered by this standard, or b) Is superseded by a re

34、quirement 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 components are intended for use only under limited

35、 conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. FEBRUARY 18, 2015 UL 842A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values st

36、ated without parentheses are the requirement. Values 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

37、 or standard. 3 Glossary 3.1 For the purpose of this standard, the following denitions 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) Fixe

38、d blending Blending at the dispenser level that blends two specic fuels into one fuel 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

39、) Variable blending Blending at the dispenser level that blends two specic fuels into 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, E6

40、0, and E85 as the actual dispensed fuel. 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. They incorporate a fusible element and close automatically in the e

41、vent 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 which function to close when the temperature in the vicinity of the

42、 valve exceeds the fusing temperature of the fusible element. 3.5 GASOLINE/ETHANOL BLENDS Blended fuels composed 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). 3.6 S

43、EALS, 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. 3.7 SEALS, STATIC A seal that is not subject to mechanical movement or other applied forces other than compression forces that are applied dur

44、ing installation and maintained during normal use conditions. FEBRUARY 18, 2015 UL 842A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 4 Assembly 4.1 All valves 4.1.1 A valve shall include all of the components required for it

45、s 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 installation, such parts shall be furnished by the manufacturer with each valve. 4.1.3 Two or more subassemblies intended to be assembled in

46、 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 or more valves or actuating devices, or both, are to be used together as one unit, the entire assembly is, for the purpose of these

47、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 becoming dislocated under service conditions as determined by the Endurance Test, Section 17. The means to secure the disc shall not rel

48、y 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 (1000F). 4.1.7 A valve with socket or butt weld ends shall be capable of being installed without damaging nonmetallic seats or seals.

49、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 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 indicated fo