1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 125 Flow Control Valves 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 Flow Control Valves for Anhydrous Ammonia and LP-Gas, UL 125 Ninth Edition, Dated March 19, 2014 Summary of Topics This revision of ANSI/UL 125 is being issued to include the following changes:
3、Update Glossary denition in 6.6 to reect the current NFPA denition; Clarify the materials used for a lever on a hose nozzle valve, addition of Exception No. 3 to 8.3; Revision to the Deformation Test to delete machine oil in 23.2; Deletion of the second External Leakage Test in 23.3; Revision to the
4、 Moist Ammonia Air Stress Cracking Test, 34.2 to replace Teon with PTFE tape. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed
5、by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated October 10, 2014. All rights reserved. No part of this publication may be repro
6、duced, 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 expressed or implied, including but not limited to, the impl
7、ied 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 arising out of the use of or the inability to use this Standard
8、, 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 electronic versions of ULs Standards for Safety agree to
9、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 Standard on the purchasers computer system. The requiremen
10、ts 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 requirements that have been revised and that have a future effecti
11、ve date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. FEBRUARY 18, 2015 UL 125 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 18, 2015 UL 125 tr2 No Text on This PageUL COPYRIGHTED MATERIA
12、L NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 19, 2014 (Title Page Reprinted: February 18, 2015) 1 UL 125 Standard for Flow Control Valves for Anhydrous Ammonia and LP-Gas The rst through seventh editions were titled Standard for Valves for Anhydrous Ammo
13、nia and LP-Gas (Other Than Safety Relief). First Edition October, 1956 Second Edition July, 1973 Third Edition February, 1974 Fourth Edition February, 1980 Fifth Edition March, 1993 Sixth Edition February, 1997 Seventh Edition April, 2007 Eighth Edition June, 2009 Ninth Edition March 19, 2014 This A
14、NSI/UL Standard for Safety consists of the Ninth Edition including revisions through February 18, 2015. The most recent designation of ANSI/UL 125 as an American National Standard (ANSI) occurred on February 18, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, T
15、itle 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 (CSDS) at http:/. ULs Standards for Safety are
16、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 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 125
17、-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P
18、ERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Service Pressure Rating .6 3 General 7 3.1 Components .7 4 Units of Measurement .7 5 Undated References 8 6 Glossary .8 CONSTRUCTION 7 General 9 8 Materials 10 9 Bodies 12 10 Springs 12 11 Shutoff Valves All .12 12 Shutoff Valves Automatic 13 13 E
19、xcess Flow Valves .13 14 Back Pressure Check Valves .14 15 Filler Valves 14 16 Vapor Return Valves 15 17 Actuated Liquid Withdrawal Excess-Flow Valves 15 18 Multiple Function Valves .17 19 Internal Valves .17 20 Emergency Shutoff Valves .18 21 Lever Operated Transfer Valves and LP-Gas Hose Nozzle Va
20、lves 18 PERFORMANCE 22 General 19 23 Deformation Test .20 24 External Leakage Test 21 25 Positive Seal Test 21 26 Seat Leakage Test 21 27 Endurance Test 24 28 Hydrostatic Strength Test 25 29 Operation Test .25 29.1 General .25 29.2 Air tests .26 29.3 Water tests 26 30 Weak Section Strength Test .27
21、31 Accelerated Aging Test 27 32 Fluid Compatibility Test 27 33 Low Temperature Test 28 34 Moist Ammonia Air Stress Cracking Test 28 35 Thermal Link Operation Test .29 36 Fire Test .29 37 Drop Test 30 38 Impact Test 30 MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 3UL C
22、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 39 Valve Stem Torque Test .31 40 Start-To-Discharge Pressure Test .31 MANUFACTURING AND PRODUCTION TESTS 41 General 32 MARKING 42 General 33 MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA
23、 AND LP-GAS - UL 125 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover the following types of anhydrous ammonia and liqueed petroleum gas (LP-Gas) valves that are used to control the ow of liq
24、uid and/or vapor into and out of containers, or in piping systems between containers, or between containers and utilization equipment, and are for use at temperatures within the range of minus 40F (minus 40C) to 130F (55C): a) Shutoff Valves (primary or secondary, and manual or automatic), b) Excess
25、 Flow Valves, c) Back Pressure Check Valves, d) Filler Valves, e) Vapor Return Valves, f) Actuated Liquid Withdrawal Excess-Flow Valves, g) Multiple function valves, h) Internal valve, i) Emergency shutoff valve, j) Lever operated transfer valve and k) LP-Gas Hose Nozzle Valve. 1.2 Valves covered by
26、 these requirements are for use in systems and facilities covered in the following Standards: a) Safety Requirements for the Storage and Handling of Anhydrous Ammonia, ANSI/CGA G-2.1 (ANSI K61.1); b) Liqueed Petroleum Gas Code , NFPA 58; and c) Utility LP-Gas Plant Code, NFPA 59. 1.3 These requireme
27、nts do not cover shutoff valves of the type commonly referred to as cylinder valves used on containers constructed under Department of Transportation (DOT) Specications. Requirements for these valves are contained in the Standard for Cylinder Valves, UL 1769. 1.4 These requirements do not cover safe
28、ty relief valves. Requirements for these valves are contained in the Standard for Safety Relief Valves for Anhydrous Ammonia and LP Gas, UL 132. MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI
29、ON WITHOUT PERMISSION FROM UL 1.5 These requirements do not cover automatic shutoff valves that use electricity to actuate the valve member. Requirements for these valves are contained in the Standard for Electrically Operated Valves, UL 429. 1.6 These requirements do not apply to LP-Gas valves for
30、use on containers or in systems for the following: a) Refrigerated storage systems and b) Marine and pipeline terminals, chemical plants, natural gas processing plants, reneries or tank farms, where tank farms do not include storage at industrial locations. 1.7 These requirements do not apply to val
31、ves for anhydrous ammonia for use on containers 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, and d) Ammonia transportation pipelines. 1.8 Except for such observations as are r
32、equired to ascertain performance characteristics, the assigning of ow capacity ratings, other than for excess ow valves, is not within the scope of these requirements. 2 Service Pressure Rating 2.1 The service pressure rating of a valve intended for use in anhydrous ammonia service shall not be less
33、 than 250 pounds per square inch (psi) (1.7 MPa) and shall not exceed 1/5 of its hydrostatic strength test pressure. 2.2 The service pressure rating of a valve intended for use in LP-Gas service shall not exceed 1/5 of its hydrostatic strength test pressure and shall be in accordance with Table 2.1.
34、 MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 2.1 Service pressure rating of LP-Gas valves Service Minimum pressure rating LP-Gas vapor at operating press
35、ure of 125 psi (0.9 MPa) gauge or less 125 psi (0.9 MPa) gauge LP-Gas liquid, or vapor at operating pressure over 125 psi (0.9 MPa) gauge and at or below container pressure 250 psi (1.7 MPa) gauge Higher than container pressure 350 psi (2.4 MPa) gauge, or the MAWP, whichever is higher 3 General 3.1
36、Components 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. 3.1.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application
37、of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 3.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 3.1.4 Specic components are incomplete in construction features or restricted
38、 in performance capabilities. 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. 4 Units of Measurement 4.1 Values stated without parentheses are the requirement. Values
39、in parentheses are explanatory or approximate information. MARCH 19, 2014 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5 Undated References 5.1 Any undated reference to a code
40、 or a standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 6 Glossary 6.1 ACTUATED LIQUID WITHDRAWAL EXCESS FLOW VALVE A type of excess ow valve that must have its mating tting connected to allow ow of uid. It is in
41、tended to be installed into a container opening to allow for uid evacuation. 6.2 BACK PRESSURE CHECK VALVE A type of valve that allows uid ow in only one direction. The amount of ow allowed in the reverse direction is outlined in the seat leakage test. The type of seat material used; i.e. resilient
42、or metal-to-metal, further categorizes back pressure check valves. 6.3 EMERGENCY SHUTOFF VALVE a A shutoff valve incorporating thermal and manual means of closing that also provides for remote means of closing. 6.4 EXCESS FLOW CHECK VALVE (or EXCESS FLOW VALVE) A valve designed to close when the liq
43、uid or vapor passing through it exceeds a prescribed ow rate. 6.5 FILLER VALVE A type of valve connected to a container that is intended under normal operation to allow uid ow into a container for lling purposes, but not out of the container. 6.6 INTERNAL VALVE a A container primary shutoff that can
44、 be closed remotely, which incorporates an internal excess ow valve with the seat and seat disc located within the container so that they remain in place should external damage occur to the valve. 6.6 revised February 18, 2015 6.7 LEVER OPERATED TRANSFER VALVE A manual, primary type of shutoff valve
45、 that is intended to be used at the end of a transfer hose used during the lling of containers. 6.8 LIQUEFIED PETROLEUM GAS (LP-GAS OR LPG) Any material having a vapor pressure not exceeding that allowed for commercial propane, as dened in Standard Specication for Liqueed Petroleum (LP) Gases, ASTM
46、D1835, 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. 6.9 LP-GAS HOSE NOZZLE VALVE A lever operated self closing fuel transfer valve that is used with a LP
47、-Gas dispenser to dispense LP-Gas into a container on a vehicle. a Reproduced with permission from NFPA 58-2014, LP-Gas Code Handbook, Copyright 2013, National Fire Protection Association. FEBRUARY 18, 2015 FLOW CONTROL VALVES FOR ANHYDROUS AMMONIA AND LP-GAS - UL 125 8UL COPYRIGHTED MATERIAL NOT AU
48、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.10 MULTIPLE FUNCTION VALVE (or MULTIPLE HEAD VALVE) A valve incorporating several types of valves into a single unit or body. 6.11 SHUTOFF VALVE A type of valve that incorporates a seat and seat disc member that will clos
49、e an internal orice to prevent further ow of uid through the valve. Shutoff valves are further categorized as primary or secondary, and manual or automatic. 6.12 SHUTOFF VALVE, AUTOMATIC A type of shutoff valve that uses energy (other than electricity) to open and close the valve member, based upon some external input. 6.13 SHUTOFF VALVE, MANUAL A type of valve that incorporates a handle, lever, handwheel or other element that anticipates hu
