1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 565 Liquid-Level Gauges for Anhydrous Ammonia and LP-GasUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT
2、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas, UL 565 Sixth Edition, Dated September 13, 2013 Summary of Topics This edition of UL 565 has been published to reect the rst time ANSI approv
3、al of the Standard and the following changes: Revised title; removal of the term indicator; clarication of existing requirements; addition of a glossary section; revisions to reect current requirements regarding calibration, test pressure, a new endurance test of vent valves; revisions regarding ass
4、embly requirement; a new leakage test in the manufacturing and production test section; new marking requirements to correlate with revised 4.6 and new 4.7. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated October 12, 2012 and July 26, 2013. All
5、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 of any kind, either exp
6、ressed or implied, including but not limited to, the implied warranties of merchantability or 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 arisin
7、g out of the use of or the inability to use this Standard, even if UL or an authorized UL representative 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
8、electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless 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 S
9、tandard 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 requireme
10、nts that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. SEPTEMBER 13, 2013 UL 565 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 13,
11、 2013 UL 565 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 13, 2013 1 UL 565 Standard for Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas Prior to the sixth edition, the standard was titled Liquid-Lev
12、el Gauges and Indicators for Anhydrous Ammonia and LP-Gas. First Edition November, 1958 Second Edition January, 1973 Third Edition November, 1986 Fourth Edition December, 1993 Fifth Edition September, 1998 Sixth Edition September 13, 2013 This ANSI/UL Standard for Safety consists of the Sixth Editio
13、n. The most recent designation of ANSI/UL 565 as an American National Standard (ANSI) occurred on September 13, 2013. 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 Sta
14、ndard 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 http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way.
15、 All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 565-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS
16、ION FROM UL SEPTEMBER 13, 2013 LIQUID-LEVEL GAUGES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 565 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 2.1 Components .4 2.2 Units of me
17、asurement .5 2.3 Undated references .5 2.4 Pressure and temperature rating .5 3 Glossary .5 CONSTRUCTION 4 Assembly 6 5 Materials .7 6 Bodies .9 7 Springs 9 8 Floats .9 PERFORMANCE 9 General 9 10 External Leakage Test 10 11 Hydrostatic Strength Test 10 12 Endurance Test 10 13 Float Crush Test 11 14
18、10-Day Moist Ammonia-Air Stress Cracking Test .11 MANUFACTURING AND PRODUCTION TESTS 15 General 12 MARKING 16 General 12 APPENDIX A Standards for ComponentsA1 SEPTEMBER 13, 2013 LIQUID-LEVEL GAUGES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 565 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
19、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover liquid-level gauges for anhydrous ammonia and liqueed petroleum gas (LP-Gas) for use with pressure vessels in nonrefrigerated systems in installations covered by the following American National Standard
20、s and others: a) Compressed Gas Association, CGA G-2.1. b) Liqueed Petroleum Gas Code, NFPA 58. c) Storage and Handling of Liqueed Petroleum Gases at Utility Plants, ANSI/NFPA 59. 1.2 These requirements cover designs of gauges that require the release of liquid or gas phases of the contained uid in
21、order to function and gauges that do not require the release of liquid or gas phases of the contained uid to function. 2 General 2.1 Components 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. See Appendix A
22、for a list of standards covering components generally used in the products covered by this standard. 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 sta
23、ndard, 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 capabilities. Such components are i
24、ntended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. SEPTEMBER 13, 2013 LIQUID-LEVEL GAUGES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 565 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
25、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values stated 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 requireme
26、nts of this standard shall be interpreted as referring to the latest edition of that code or standard. 2.4 Pressure and temperature rating 2.4.1 The rated service-pressure of a gauging device covered by these requirements shall not be less than 250 psig (1.7 MPa gauge). 2.4.2 Gauging devices covered
27、 by these requirements are intended for use at ambient temperatures within the range of minus 40C 55C (minus 40F 55F). 3 Glossary 3.1 For the purpose of this standard the following denitions apply. 3.2 FIXED LIQUID LEVEL GAUGE A liquid level indicator that uses a positive shutoff vent valve to indic
28、ate that the liquid level in a container being lled has reached the point at which the indicator communicates with the liquid level in the container. Reproduced with permission from NFPA 58-2011, LP-Gas Code Handbook, Copyright 2010, National Fire Protection Association 3.3 LIQUEFIED PETROLEUM GAS (
29、LP-GAS OR LPG) Any material having a vapor pressure not exceeding that allowed for commercial propane that is composed predominantly of the following hydrocarbons, either by themselves (excluding propylene) or as mixtures: propane, propylene, butane (normal butane or isobutane) and butylenes. 3.4 MA
30、GNETIC-FLOAT GAUGE A type of variable liquid level gauge that incorporates a oat that rests on the liquid level, which is connected to a series of gears and linkages that move in relation to the liquid level. The dial is connected to the gears and linkages through magnets on either side of the enclo
31、sure so no leakage occurs if there is a failure of the linkage mechanism. This type of gauge does not release contained uid to atmosphere in order to function. 3.5 ROTARY GAUGE A type of variable liquid level gauge that indicates the liquid level on a dial gauge installed on an ASME container by man
32、ually rotating an open ended tube inside the container, which is connected to a positive shutoff vent valve. Reproduced with permission from NFPA 58-2011, LP-Gas Code Handbook, Copyright 2010, National Fire Protection Association 3.6 SLIP TUBE GAUGE A variable liquid level gauge in which a small pos
33、itive shutoff valve is located at the outside end of a straight tube that is installed vertically within a container. Reproduced with permission from NFPA 58-2011, LP-Gas Code Handbook, Copyright 2010, National Fire Protection Association SEPTEMBER 13, 2013 LIQUID-LEVEL GAUGES FOR ANHYDROUS AMMONIA
34、AND LP-GAS - UL 565 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.7 VARIABLE LIQUID LEVEL GAUGE A device that indicates the liquid level in a container throughout a range of levels. Reproduced with permission from NFPA 58-2011, LP-Gas C
35、ode Handbook, Copyright 2010, National Fire Protection Association 3.8 VENT VALVE A type of manual shutoff valve that has a controlled orice. Gauges that employ a vent valve release contained uid to atmosphere to function. CONSTRUCTION 4 Assembly 4.1 A gauge, when not assembled by the manufacturer a
36、s a unit, shall be arranged in as few subassemblies as practical; and shall be capable of being installed as a nal assembly without alteration, other than for adjustment in the length of a gauging tube. 4.2 When a design requires the use of tubing, tubing ttings, pipe ttings, gaskets, bolts, cap scr
37、ews, and the like, for making a proper installation, such parts shall be furnished by the manufacturer with each gauge when shipped. 4.3 The construction shall be such that parts can be readily reassembled in their intended manner after being dismantled to the extent needed for installation and norm
38、al care. 4.4 Convenient means shall be provided for the purpose of making any necessary eld adjustment. 4.5 A brazing material used for joining uid conning parts of a gauge for LP-Gas shall have a melting point (solidus temperature) not less than 538C (1000F). Brazing shall not be used on assemblies
39、 for anhydrous ammonia. 4.6 A dial of a magnetic-oat or of a rotary-tube type gauge intended to be installed on a container greater than 1200 gallons for use with LP-Gas, and which is intended to be used for lling in accordance with the Liqueed Petroleum Gas Code, NFPA 58, shall be marked so that th
40、e maximum liquid level for butane, for a 50-50 butane-propane mixture, and for propane is readily determinable at temperatures between minus 7 and 46C (20 and 115F). Markings shall be in increments of not more than 11C (20F). Exception: If the marked temperature range does not include minus 7 and 46
41、C (20 and 115F), the gauge dial shall be marked in accordance with 16.4. 4.7 A dial of a gauge intended to be installed on a container greater than 1200 gallons that is not to be used for lling shall be marked in accordance with 16.5. 4.8 A dial of a magnetic-oat or of a rotary-tube type gauge inten
42、ded to be installed on ASME containers for use with anhydrous ammonia shall be marked so that the maximum liquid level for anhydrous ammonia is readily determinable at temperatures between minus 7 and 38C (20 and 100F). Markings shall be in increments of not more than 11C (20F). Exception: If the ma
43、rked temperature range does not include minus 7 and 38C (20 and 100F), the gauge dial shall be marked in accordance with 16.4. SEPTEMBER 13, 2013 LIQUID-LEVEL GAUGES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 565 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER
44、MISSION FROM UL 4.9 A dial of a magnetic-oat or of a rotary-tube type gauge for use with LP-Gas shall be marked to indicate whether it is for use with cylindrical or spherical containers and whether it is for use in aboveground or underground service. 4.10 A dial of a magnetic-oat or of a rotary-tub
45、e type gauge for use only in LP-Gas aboveground containers of over 1200 gallons (4542 L) water capacity shall be so marked. 4.11 Dial markings shall be legible and shall not be readily discolored or obliterated by weathering. 4.12 A gauge, other than for farm use as mentioned in 4.13, that requires
46、the release of the contained uid to the atmosphere to function, such as those of the rotary-tube, slip-tube, xed-tube, and vent-valve types, shall be constructed so that the controlling orice is not larger than a No. 54 (0.055-inch diameter) drill size. 4.13 A xed-tube or a vent-valve gauge that is
47、intended for mounting on a container for anhydrous ammonia used solely on farm equipment for eld application of ammonia, is permitted to be constructed with a controlling orice larger than that indicated in 4.12, but not larger than 7/16-inch diameter. Such a device shall be marked with the size of
48、the opening. 4.14 A gauging tube of a slip-tube type of liquid-level gauge shall be constructed with a substantially secured stop on its lower end to prevent the tube from being withdrawn completely from the body of the gauge or forced out by container pressure. 5 Materials 5.1 Fluid conning parts o
49、f a gauge, or its operating parts, the failure of which might result in leakage, shall have the strength and durability necessary to perform their intended function. 5.2 A part in contact with the uid to be handled shall be resistant to the action of such uid. 5.3 Only iron, steel, and certain nonferrous alloys that are suitable for ammonia service, are to be used in contact with anhydrous ammonia. Ammonia containing minute quantities of water will
