1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOctober 5, 20121UL 119OUTLINE OF INVESTIGATIONFORADAPTERS, FITTINGS AND COUPLINGS FOR ANHYDROUS AMMONIA ANDFUEL GASESIssue Number: 3October 5, 2012Summary of TopicsThis is the third issue of the
2、Outline of Investigation for Adapters, Fittingsand Couplings for Anhydrous Ammonia and Fuel Gases, UL 119, includesa revision to clarify the marking requirement for thermal shutoff devices.COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
3、DISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 5, 2012UL 1192No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 General 62.1 Components .62.2 Undated references .72.3 Units of measurement .72.4
4、Pressure rating .72.5 Temperature rating .73 Glossary .8CONSTRUCTION4 General 95 Assembly 96 Excess Flow Mechanisms 97 Quick Connect Couplings and Adapters 108 Thermal Shutoff Devices 109 Sight Flow Indicators .1010 Bodies .1111 Materials .1112 Springs 1313 Diaphragms 1314 Instructions 13PERFORMANCE
5、15 General 1316 Deformation Test .1417 External Leakage Test 1518 Bending Test .1519 Seat Leakage Test 1620 Capacity and Operation Test .1721 Automatic Reset and Bypass Flow Test .1822 Excess Flow Endurance Test 1923 Shutoff and Vent Valve Endurance Test .1924 Quick Connect Coupling Endurance Test 1
6、925 Rotational Test .2026 Pull Test .2027 Temperature Shock Test 2028 Weak Section Strength Test .2029 Impact Test 2130 Hydrostatic Strength Test 2131 Temperature Activated Shutoff Test .2132 Fire Test .2233 10-Day Moist Ammonia Air Stress Cracking Test .2234 Accelerated Aging Test 2335 Fluid Compat
7、ibility Test 2336 Low Temperature Test 24OCTOBER 5, 2012 UL 119 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMANUFACTURING AND PRODUCTION TESTS37 General 24MARKINGS38 General 25OCTOBER 5, 2012UL 1194UL COPYRIGHTED MATERIAL NOT AUTHORIZED F
8、OR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover adapters, couplings and fittings intended for use with natural gas,manufactured gas, liquefied petroleum gas (LP-Gas), and mixtures thereof, or anhydrous ammonia formaking connections in
9、domestic, commercial, or industrial types of systems. Devices that have beenidentified are as follows:a) Adapters and fittings, which include those that convert one connection to another;b) Excess flow and check valve adapters and fittings;c) Filling adapters;d) Gauge adapter and fittings;e) Quick-C
10、onnect Couplings (other than for low pressure couplings in accordance with theStandard for Quick Disconnect Devices for Use with Gas Fuel Appliances, CSA/ANSI Z21.41;f) Sight flow indicators;g) Breakaway couplings;h) Thermal shutoff adapters and fittings; andi) Unloading adapters.1.2 Devices covered
11、 by these requirements are intended for use in systems and facilities covered in oneof the following:a) National Fuel Gas Code, NFPA 54;b) Liquefied Petroleum Gas Code, NFPA 58;c) American National Standard Safety Requirements for the Storage and Handling ofAnhydrous Ammonia, ANSI/CGA G-2.1 (ANSI K6
12、1.1); ord) Standard on Recreational Vehicles, NFPA 1192.1.3 Adapters, couplings and fittings for LP-Gas engine fuel service are covered by the Outline ofInvestigation for LP-Gas and Natural Gas Devices for Engine Fuel Systems, Subject 1337.1.4 These requirements do not apply to adapters, couplings o
13、r fittings for anhydrous ammonia for use oncontainers or in systems for the following:a) Refrigerated storage systems,b) Ammonia manufacturing plants,c) Refrigeration plants where ammonia is used solely as a refrigerant, andd) Ammonia transportation pipelines.OCTOBER 5, 2012 UL 119 5UL COPYRIGHTED M
14、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this outline shall comply with therequirements for that component.2.1.2 A component is not required to comply with a
15、 specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this outline, orb) Is superseded by a requirement in this outline.2.1.3 A component shall be used in accordance with its rating established for the intended co
16、nditions ofuse.2.1.4 Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are intended for use only under limited conditions, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific condi
17、tions.2.1.5 Adapters for actuated liquid withdrawal excess flow valves shall comply with the applicablerequirements of the Standard for Valves for Anhydrous Ammonia and LP-Gas (Other Than Safety Relief),UL 125.2.1.6 Adapters fittings and couplings used in LP-Gas or anhydrous ammonia filling applicat
18、ions thatincorporate a fixed liquid level gauge shall comply with the Seat Leakage Test, Section 19, and the Shutoffand Vent Valve Endurance Test, Section 23.2.1.7 Adapters fittings and couplings used with filler valves for LP-Gas or anhydrous ammonia service,which incorporate a check valve, shall c
19、omply with the applicable requirements of the Standard for Valvesfor Anhydrous Ammonia and LP-Gas (Other Than Safety Relief), UL 125.2.1.8 Gauging devices, including fixed tube and vent valve indicators, used in the assembly of adapters,fittings, or couplings shall comply with the applicable require
20、ments of the Standard for Liquid-LevelGauges and Indicators for Anhydrous Ammonia and LP-Gas, UL 565.2.1.9 A pigtail or flexible hose connection that is part of an adapter, or coupling for LP-Gas shall complywith the applicable requirements of the Standard for Pigtails and Flexible Hose Connectors f
21、or LP-Gas,UL 569.OCTOBER 5, 2012UL 1196UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to th
22、e latest edition of that code or standard.2.3 Units of measurement2.3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.2.4 Pressure rating2.4.1 Adapters, couplings and fittings that are intended for use with liquefied petroleum
23、gas (LP-Gas), oranhydrous ammonia and are intended to be connected directly to containers or container appurtenancesshall be rated for use at a pressure not less than 250 psig. Devices intended to be used downstream ofa LP-Gas pump, or dispensing unit shall be rated for use at a pressure not less th
24、an 350 psig.2.4.2 Adapters, couplings and fittings that are intended for use with natural gas, liquefied petroleum (LP)gases in the gaseous phase and LP-Gas-air mixtures shall be rated for 1/2, 2, 5 psig or higher than 5 psigin 5 psi increments up to and including a maximum operating pressure of 125
25、 psig.2.4.3 Devices other than noted in 2.4.1 and 2.4.2 shall be rated not less than the pressure rating of thepiping system to which they are intended to be installed.2.5 Temperature rating2.5.1 Adapters, couplings and fittings that are intended for use with LP-Gas or anhydrous ammonia at apressure
26、 greater than 20 psig shall be rated for outdoor use. All other devices may be rated for indoor oroutdoor use.2.5.2 Outdoor use shall include an ambient temperature range not less than the range of minus 40F(minus 40C) 130F (55C).2.5.3 Indoor use shall include an ambient temperature range not less t
27、han the range of 32F (0C) 125F (52C).OCTOBER 5, 2012 UL 119 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Glossary3.1 For the purpose of this outline, the following definitions apply.3.2 ADAPTER A fitting that is used to convert one type
28、or size of connection to another.3.3 BODY The principal structure of the device that contains and supports internal mechanisms andconstitutes the main gas passage.3.4 BREAKAWAY COUPLING A coupling that incorporates a weak section that is designed tofracture when a sufficient force is applied.3.5 BYP
29、ASS A passageway, orifice, or path that permits fluid flow entirely independent of the actionof a mechanism or valve.3.6 CHECK VALVE, BACKPRESSURE A device that permits fluid flow in only one direction.3.7 CONNECTION That part of the device that mates with the piping system component, e.g. valve,reg
30、ulator, hose assembly, another fitting or adapter, or piping component.3.8 EXCESS FLOW MECHANISM (VALVE) A device that is in an open position and closes when aspecified amount of flow (liquid or vapor) is obtained.3.9 GAUGING DEVICE A device that measures either pressure or liquid level in a contain
31、er orpiping system. Pressure type gauging devices may be considered leak detectors by indicating pressureloss in a piping system between two shutoff valves.3.10 LIQUEFIED PETROLEUM GAS (LP-GAS OR LPG) Any material having a vapor pressure notexceeding that allowed for commercial propane that is compo
32、sed predominantly of the followinghydrocarbons, either by themselves (excluding propylene) or as mixtures: propane, propylene, butane(normal butane or isobutane) and butylenes.3.11 QUICK CONNECT DEVICE A device that consists of two parts, which provides a means formanually connecting and disconnecti
33、ng components of a piping or hose system or appliance, withoutthe use of tools.3.12 SIGHT FLOW INDICATOR A device that incorporates a means to visually inspect liquid flowconditions.3.13 THERMAL SHUTOFF VALVE A device that is in an open position and closes when the deviceis exposed to a specified te
34、mperature.3.14 TOOL, SPECIAL Tools that are not available on the open retail market.3.15 UNLOADING ADAPTER A device that incorporates a shutoff valve, which allows removal ofliquefied gas from a container that employs a filler valve.OCTOBER 5, 2012UL 1198UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FU
35、RTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONSTRUCTION4 General4.1 Features or special constructions not outlined herein shall be evaluated using other publishedstandards and requirements as appropriate.5 Assembly5.1 An adapter, fitting or coupling shall include all the components
36、required for its normal function.5.2 When an adapter, fitting or coupling is of a design that requires the use of special pipe flanges,gaskets, bolts, or other special parts to create a proper installation, such parts shall be furnished by themanufacturer with each device.Exception: Each portion of
37、a quick connect coupling can be provided separately.5.3 Adapters, fittings and couplings shall be constructed to discourage disassembly in the field beyondthat needed for regular maintenance.5.4 Parts of adapters, fittings or couplings that come in contact with a diaphragm shall not have sharpedges
38、that may damage it.5.5 Manual shutoff valves that are incorporated into adapters and couplings shall comply with therequirements of the Standard for Valves for Anhydrous Ammonia and LP-Gas (other Than Safety Relief),UL 125.5.6 An adapter shall not be constructed with a CGA V-1 Standard Connection No
39、. 510, 555, or 791 nippleand nut assembly, or a Connection No. 810 plug on one end and a Connection 600 valve outlet assemblyon the other end.6 Excess Flow Mechanisms6.1 An excess flow mechanism shall be constructed with mechanical means that will prevent gas flow inexcess of the manufacturers speci
40、fied maximum flow rate at maximum inlet operating pressure atstandard conditions.6.2 An excess flow mechanism for natural gas service, liquefied petroleum (LP) gases in the gaseousphase and LP-Gas-air mixtures not exceeding 1/2 psig shall incorporate an automatic reset feature thatresets only when d
41、esigned to do so.6.3 An excess flow mechanism in a Type I (CGA 791) or Type II (CGA 810) cylinder connection shallcomply with the Standard for Adapters and Cylinder Connection Devices for Portable LP-Gas CylinderAssemblies, UL 2061.6.4 An excess flow mechanism for use with LP-Gas or anhydrous ammoni
42、a at a pressure of 250 psig orgreater shall comply with the Standard for Valves for Anhydrous Ammonia and LP-Gas (other Than SafetyRelief), UL 125.OCTOBER 5, 2012 UL 119 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.5 An excess flow mecha
43、nism for LP-Gas service may employ either an automatic or manual resetfeature.6.6 An excess flow mechanism that incorporates a bypass shall have a bypass area not to exceed thatof a No. 60 size drill (0.040 inch diameter).7 Quick Connect Couplings and Adapters7.1 Quick connect couplings shall be equ
44、ipped with an automatic means to shut off the fluid supply, suchas a resilient seat check valve, when the two parts of the device are disconnected. A check valve mayalso be provided in the downstream portion.7.2 Quick connect couplings for natural, manufactured and mixed gases, or LP-Gas not exceedi
45、ng 1/2 psi(3.5 kPa) shall comply with the applicable requirements of Quick Disconnect Devices for Use With GasFuel Appliances, CSA/ANSI Z21.41.7.3 Adapters, fittings or couplings that incorporate a CGA V-1 Standard Connection No. 791 or 810components shall comply with the applicable requirements of
46、the Standard for Adapters and CylinderConnection Devices for Portable LP-Gas Cylinder Assemblies, UL 2061.Exception No. 1: Filling adapters are permitted to incorporate the profile dimensions of a CGA StandardV-1, Connection Nos. 791 or 810, without having thermal shutoff or excess flow valve compon
47、ents.Exception No. 2: An adapter that incorporates a CGA V-1 Standard Connection No. 791 nipple/couplingnut on one end and a No. 791 valve outlet on the other end shall only be required to incorporate a checkvalve in the No. 791 valve outlet portion of the adapter.8 Thermal Shutoff Devices8.1 Therma
48、l shutoff mechanisms in adapters, fittings, and couplings, other than those incorporated into aCGA Standard V-1, Connection Nos. 791 or 810, shall be of such a design that once activated shall closeand not re-open to allow flow.9 Sight Flow Indicators9.1 Glass covering an opening shall be of the non
49、-shattering or tempered type, secured in place so thatit cannot be readily displaced in service, and shall have a minimum thickness of 1/16 inch (1.6 mm).9.2 Glass shall be provided with self-closing mechanical protection or shall be able to withstand a 5 ft-lb(22.2 N) impact without cracking or breaking. See Impact Test, Section 29.OCTOBER 5, 2012UL 11910UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Bodies10.1 A threaded section of a body designed for connection to pipe threads s
