UL842-2021可燃液体阀门(中文)

1、ul842-2021可燃液体阀门(中文) 可燃液体阀门 ul 842 isbn 0-7629-1302-9 valves for flammable fluids 用于可燃液体阀的标准 可燃液体阀门 underwriters laboratories inc. (ul) 333 p ngsten road northbrook, il 60062-2096 ul standard for safety for valves for flammable fluids, ul 842 ninth edition, dated april 19, 2021 summary of topics thi

2、s new edition of ansi/ul 842 includes editorial revisions consisting of updated references and renumbering of the standard. no changes in requirements have been made. ul standards for safety are developed and maintained in the standard generalized markup language (sgml). sgml -an international stand

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4、ents have been changed) may be included in revision pages due to relocation of existing text and reformatting of the standard. as indicated on the title page (page 1), this ul standard for safety is an american national standard. attention is directed to the note on the title page of this standard o

5、utlining the procedures to be followed to retain the approved text of this ansi/ul standard. as indicated on the title page (page1), this ul standard for safety has been adopted by the department of defense. the ul foreword is no longer located within the ul standard. for information concerning the

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19、on of an electronic standard. because of differences in the computer/software/printer setup used by ul and those of electronic standards purchasers, the printed copy obtained by a purchaser may not look exactly like the on-line screen view or the printed standard. an employee of an organization purc

20、hasing a ul standard can make a copy of the page or pages being viewed for their own fair and/or practical internal use. 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 i

21、ndicated 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that have been revised and that have a future effective date are located after the standard, and are preceded by a superseded requirements notice. new product submittals made prior to a speci ed future effective date w

22、ill be judged under all of the requirements in this standard including those requirements 可燃液体阀门 with a speci ed future effective date, unless the applicant speci cally requests that the product be judged under the current requirements. however, if the applicant elects this option, it should be note

23、d that compliance with all the requirements in this standard will be required as a condition of continued listing, recognition, and follow-up services after the effective date, and understanding of this should be signi ed in writing. copyright 2021 underwriters laboratories inc. thisstandardconsists

24、ofpagesdatedasshowninthefollowingchecklist: page date 1-30 .april19,2021 可燃液体阀门 april 19, 2021 ansi/ul 842-2021 ul 842 standard for valves for flammable fluids the rst edition was titled construction and performance of hazardous liquid valves. the second edition was titled valves for hazardous liqui

25、ds. the third and fourth editions were titled valves for flammable liquids and fuel gases. first edition may, 1930 second edition july, 1950 third edition november, 1959 fourth edition may, 1973 fifth edition january, 1974 sixth edition june, 1980 seventh edition june, 1993 eighth edition april, 199

26、7 ninth edition april 19, 2021 the most recent designation of ansi/ul 842 as a reaffirmed american national standard (ans) occurred on april 19, 2021. this ansi/ul standard for safety, which consists of the eighth edition is under continuous maintenance, whereby each revision is ansi approved upon p

27、ublication. an effective date included as a note immediately following certain requirements is one established by underwriters laboratories inc. the department of defense (dod) has adopted ul 842 on august 10, 1989. the publication of revised pages or a new edition of this standard will not invalida

28、te the dod adoption. revisions of this standard will be made by issuing revised or additional pages bearing their date of issue. a ul standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set o

29、f revised requirements. 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 . isbn 0-7629-1302-9 可燃液体阀门 copyright 1974, 2021 underw

30、riters laboratories inc. introduction 引言 1 scope .5 2 glossary .6 3 general .6 3.1 components .6 3.2 units of measurement.7 3.3 undated references.7 construction 装配 4 assembly .7 4.1 all valves .7 4.2 shut off valves.8 4.3 hose nozzle valves .8 5 materials. .10 6 bodies and covers.11 7 seals and stu

31、ffing boxes .11 8 diaphragms .12 9 springs .13 10 operating mechanisms .13 performance 性能测试 11 general.13 12 deformation test .14 13 external leakage test .15 13.1 general .15 13.2 fuel gas valves .15 13.3 diaphragm-type fuel gas valves .16 14 seat leak age test.17 15 hose nozzle valve strength test

32、.18 16 operation test .19 可燃液体阀门 16.1 general .19 16.2 hose nozzle valve.20 17 fire test.20 1 18 weak section strength test .21 19 pull test.22 20 sensitivity test .22 21 endurance test .23 22 hydrostatic strength test .24 23 electrical continuity test .24 24 salt spray test.25 25 10-day moist ammon

33、ia-air stress cracking test .25 26 tests of synthetic rubber parts .26 26.1 general .26 26.2 volume change test .26 26.3 weight loss test .27 27 marking adhesion test .27 manufacturing and production tests 制造及产品测试 28 general.28 installation instructions 29 general 28 marking 30 general.28 可燃液体阀门 int

34、roduction 1 scope 范围 1.1 these requirements cover valves that are intended to be used for the control of ammable uids. they are of the type commonly used in piping systems and in the assembly of motor fuel dispensing and fuel burning equipment. valves covered by this standard are for use with ammabl

35、e uids which are handled at temperatures within the range of minus 29c (minus 20f) to 52c (125f). 1.1 这些条件适用于掌握可燃液体的阀门。他们是常用的管道系统和安排燃料的发动机和燃料的燃烧设备组装使用的类型。本标准所涵盖的阀门使用易燃液体的温度下处理，这是在零下29范围 c（-20 f）至52（125）。 1.2 these requirements cover valves of the manually operated, pressure operated, or temperature

36、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 requirements. 1.2 这些条件包含了手工操作的、压力操作的、温度操作的或者不用电力操作的组

37、合阀门。当他们组成一个整体，具有额外的功能时，就不在这个范围之内。 1.3 these requirements do not cover the following: 不包含以下几种条件： a) valves for handling liquids under cryogenic conditions. 使用低温液体的阀门 b) valves for general re nery service, offshore and pipe line terminals, natural gas processing plants, gas distribution systems, petro

38、chemical processing facilities, or the like. 炼油厂，海洋管道，自然气加工厂，配气系统，石化加工设施，或类似系列的阀门。 c) constant-level oil valves and electrically operated valves. 恒定液体油阀和电控阀 d) relief valves and pressure regulators for lique ed petroleum gas (lp-gas) service. 用液化石油气的平安阀和压力调整阀 e) shutoff and check valves for lique ed

39、 petroleum gas (lp-gas) in the liquid phase. 用液化石油气的切断阀和止回阀 可燃液体阀门 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 hose end valves, ansi z21.15. 依据手动气阀标准或

40、者ansi z21.15（appliance connector valves and hose end valves）可手工操作赌帽和阀体或者要摇动阀瓣的气阀。 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. 标准ans

41、i z21.18（standard for gas appliance pressure regulators）、ansi z21.21（standard for automatic valves for gas appliances）、ansi z21.23（standard for gas appliance thermostats）所包含的阀门。 1.4 a product that contains features, characteristics, components, materials, or systems new or different from those cover

42、ed by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. a produ

43、ct whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and

44、implementation of this standard. 1.4 产品包括功能、特点、元件、材料或跟标准所规定的有所不同，同时涉及到火灾或触电或人身损害风险而增加的元件要符合原标准规定。一个产品其功能，特点，元件，材料，或系统有特别要求与本标准规定相抵触。要求修改的，应当提交申请，修订和新版本实行同一标准。 2 glossary 术语 2.1 emergency shutoff valves valves intended for installation at the inlet of remote control type ammable liquid dispensing dev

45、ices. they are normally held open by a mechanical holding means. they 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). 2.1紧急迫断阀 一种安装在可燃液体设备入水口

46、端用于远程掌握的阀门。通常由机械掌握保持打开状态。运用易熔元件在火灾或爆破时自动关闭。最小承受压力50 psi (345 kpa)。 2.2 flammable fluids fuel oil, gasoline, kerosene, and similar petroleum products, lique ed petroleum gas (lp-gas) in the gaseous phase, 可燃液体阀门 not in excess of 1 pound per square inch (psi) (6.9 kpa), and manufactured and natural fu

47、el gases. 2.2易燃液体-不超过1磅每平方英寸燃料油，汽油，煤油和相像石油产品，液化石油气，以及人造和自然燃料气体。 2.3 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 valve exceeds the fusing temperature of the fusible element. 2.3熔丝切断阀-在输送燃气和燃油时，

48、当阀门四周的温度超过了易熔元件的燃点，起到关闭作用的阀门。 2.4 hose nozzle valve, automatic a hose nozzle valve that incorporates a mechanism that shuts off the ow of liquid during refueling operations to prevent over ow from the ll opening when the tank is over lled. 2.4自动软管喷嘴阀-在加油过程中关闭，防止油箱过满导致溢出的阀门。 2.5 hose nozzle valves se

49、lf-closing type valves designed for an operating pressure of minimum 50 psi (345 kpa) and intended for use at the outlet end of a hose for dispensing ammable liquids. 2.5软管喷嘴阀-在易燃液体的软管出水口使用。最小承受压力为50 psi (345 kpa)的自闭型阀门。 3 general 综述 3.1 components 元件 3.1.1 except as indicated in 3.1.2, a component of a product covered by this standard shall comply with the requirements for that component. 3.1.1除3.1.2所述的元件外，本标准范围内的产