1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 144 LP-Gas RegulatorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
2、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for LP-Gas Regulators, UL 144 Eighth Edition, Dated May 25, 2012 Summary of Topics This revision of ANSI/UL 144 includes the addition of CGA 793 tting in 7.5. Text that has been changed in any manner or impacted by ULs electronic pub
3、lishing 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 by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The revised requirements ar
4、e substantially in accordance with Proposal(s) on this subject dated September 19, 2014. All 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 pri
5、or 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 tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or simi
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7、r 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 harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees
8、) 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, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effec
9、tive 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. NOVEMBER 5, 2014 UL 144 tr1UL COPYRIGHTED MATERIAL NOT A
10、UTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 5, 2014 UL 144 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 25, 2012 (Title Page Reprinted: November 5, 2014) 1 UL 144 Stan
11、dard for LP-Gas Regulators The First and Second editions were titled Pressure Regulators for LP-Gas. The Third through Sixth editions were titled Pressure Regulating Valves for LP-Gas. First Edition December, 1959 Second Edition April, 1971 Third Edition October, 1973 Fourth Edition March, 1978 Fift
12、h Edition August, 1985 Sixth Edition April, 1994 Seventh Edition April, 1998 Eighth Edition May 25, 2012 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through November 5, 2014. The most recent designation of ANSI/UL 144 as an American National Standard (ANSI) oc
13、curred on November 5, 2014. 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 should be submitted via a Proposal Req
14、uest 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, ownerships, and rights regarding those Standards
15、 shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 144-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 11, 2014 LP-GAS REGULATORS - UL 144 2 No Text on This PageUL COPYRIGHTED
16、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 6 2.1 Units of measurement .6 2.2 Components .6 2.3 Undated references .6 2.4 Terminology .6 3 Glossary .7 4 Service Pressure and Temperature Ratings 8 CONSTRUCTION
17、 5 Assembly 9 6 Materials .9 7 Bodies and Bonnets 11 8 Bonnet Vent Openings .12 9 Bonnet Caps 13 10 Springs 14 11 Diaphragms 14 12 Linkage Mechanisms 14 13 Hose Assemblies .14 14 Pressure-Regulating Adjustments .14 15 Regulator Overpressure Protection 15 PERFORMANCE 16 General 18 17 Deformation Test
18、 .19 18 Regulating Adjustment Test 20 19 Leakage and Strength of Mechanism Test .21 20 Changeover Leakage Test .21 21 Swivel Coupling Leakage Test .22 22 Excess Pressure Test .22 23 Strength of Body Test .23 24 Lock-Up Test .23 25 Flow Test 24 25.1 General .24 25.2 Test method .25 26 Pressure Relief
19、 Test 26 27 Type I Relief Flow Valve Capacity Test 26 28 Type II Relief Valve Flow Capacity Test .27 29 Overpressure Shutoff (OPSO) Feature Tests .27 29.1 General .27 29.2 Activation test 28 29.3 Leakage and strength test .30 29.4 OPSO feature endurance test .31 29.5 Repeated tests .34 30 Endurance
20、Test 34 30A Endurance Test Manual Shutoff Valves .34A APRIL 11, 2014 LP-GAS REGULATORS - UL 144 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 31 Service-Reserve Indicator Endurance Test .35 32 Service-Reserve Indicator Impact Test 35 33 F
21、reezing Rain Test 35 34 Moist Ammonia-Air Stress Cracking Test 38 35 LP-Gas Compatibility Tests 38 36 Volume Change Test 38A 37 Weight-Loss Test .39 38 Accelerated-Aging Test 39 39 Low Temperature Test 40 MANUFACTURING AND PRODUCTION TESTS 40 General 40 MARKING 41 General 40 APRIL 11, 2014 LP-GAS RE
22、GULATORS - UL 144 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover pressure regulators for use with LP-Gas equipment. 1.2 Regulators covered by these requirements are intended for use in non-
23、refrigerated systems in accordance with the following standards: a) Liqueed Petroleum Gas Code, (National Fire Codes, Vol. 2) NFPA 58; b) National Fuel Gas Code ( IAS/A.G.A. Z223.1), NFPA 54; c) Outdoor Cooking Gas Appliances, IAS/A.G.A. Z21.58; and d) Standard on Recreational Vehicles (RVIAA119.2)
24、(National Fire Codes, Vol. 7), NFPA 501C. 1.3 These requirements do not cover: a) Compressed gas regulators; b) Gas appliance pressure regulators; c) Regulators for use in chemical, petroleum, or utility power plants; pipeline or marine terminals; or related storage facilities at such plants or term
25、inals; d) Combination gas control valves for gas appliances; e) Regulators for use in oxygen-fuel, gas-welding, and cutting operations; and f) Regulators for use in engine fuel (automotive and/or marine) applications. The requirements for (a) (e) are covered in the Standard for Compressed Gas Regula
26、tors, UL 252, and in the Standard for Gas Appliance Pressure Regulators, IAS/A.G.A. Z21.18, and in the Standard for Combination Gas Controls for Gas Appliances, IAS/A.G.A. Z21.78, respectively. 1.4 The assigning of ow ratings to regulators is not within the scope of these requirements, and observati
27、ons of ow values are required to ascertain stability characteristics within the manufacturers rated capacity. These requirements include tests to verify outlet pressure stability characteristics within the manufacturers rated capacity. The manufacturer is to submit this data prior to the investigati
28、on of the device. See the Flow Test, 25.1.1 and 25.1.2, regarding the outlet pressure instability denition. 1.4 revised April 11, 2014 APRIL 11, 2014 LP-GAS REGULATORS - UL 144 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 U
29、nits of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2 Components 2.2.1 Except as indicated in 2.2.2, a component of a product covered by this standard shall comply with the requirements for that componen
30、t. 2.2.2 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 requirement in this standard. 2.2.3 A component shall be used in a
31、ccordance with its rating established for the intended conditions of use. 2.2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied
32、limits, and shall be used only under those specic conditions. 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 or standard. 2.4 Terminology 2.4.1 The term regul
33、ator as used in this standard refers to a device placed in a gas line for reducing, controlling, and maintaining the pressure in that portion of the piping system downstream of the device. MAY 25, 2012 LP-GAS REGULATORS - UL 144 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS
34、TRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3.1 For the purpose of this standard the following denitions apply. 3.2 MANIFOLD, AUTOMATIC CHANGEOVER A unit that combines two high-pressure regulators into a single unit that is intended to be connected to the inlet of a second stage regulator. It in
35、corporates two inlet connections with a single outlet connection, which is intended for use with dual or multiple cylinder installations. It incorporates a service-reserve indicator or provision for attachment of a service-reserve indicator. The manifold automatically changes the LP-Gas vapor withdr
36、awal from the designated service cylinder to the designated reserve cylinder without interruption of service. A switching device is manually selected to alternate between the service and reserve cylinders. 3.3 LOCKUP PRESSURE The outlet pressure of the regulator under no-ow conditions. 3.4 OVERPRESS
37、URE SHUTOFF (OPSO) FEATURE A feature that shuts off the ow of LP-Gas vapor when the outlet pressure of the regulator reaches a predetermined maximum pressure. 3.5 REGULATOR, AUTOMATIC CHANGEOVER An integral two stage regulator that combines two high pressure regulators and a second stage regulator i
38、nto a single unit. It incorporates two inlet connections that is designed for use with dual or multiple cylinder installations. The system automatically changes the LP-Gas vapor withdrawal from the designated service cylinder(s) to the designated reserve cylinder(s) without interruption of service.
39、It incorporates a service-reserve indicator or provision for attachment of a service-reserve indicator. The service-reserve indicator gives a visual indication of the cylinder(s) that are supplying the system. A switching device is manually selected to alternate between the service and reserve cylin
40、ders. 3.6 REGULATOR, FIRST-STAGE A type of high-pressure regulator for LP-Gas vapor service designed to reduce pressure from the container to a nominal pressure of21 0psig (13.7 68.7 kPa). 3.7 REGULATOR FLOW CAPACITY The maximum ow rate of a regulator at conditions as specied by the manufacturer, us
41、ually given in units of BTU/hr and which is based upon factory setting of inlet and outlet (delivery) pressures. 3.8 REGULATOR, HIGH-PRESSURE A pressure regulator for LP-Gas liquid or vapor service designed to reduce pressure from the container to a lower pressure in excess of 1.0 psig (6.9 kPa). 3.
42、9 REGULATOR, INTEGRAL TWO-STAGE A pressure regulator that combines a high pressure regulator and a second-stage regulator into a single unit. 3.10 REGULATOR, MANUAL CHANGEOVER A single stage regulator with a manifold that contains two inlets that allow LP-Gas to ow from one inlet or the other using
43、a handle or lever through the single stage regulator to the gas consuming equipment. It is designed to be used with two LP-Gas containers. When the supply is exhausted from one container, the lever or handle must be manually moved to allow LP-Gas to ow from the second container. 3.11 REGULATOR, SECO
44、ND-STAGE A pressure regulator for LP-Gas vapor service designed to reduce rst-stage regulator outlet pressure to a pressure equal to or less than 14 inch (356 mm) water column nominal 11 inch (279 mm) water column. 3.12 REGULATOR, SINGLE-STAGE A pressure regulator for LP-Gas vapor service designed t
45、o reduce pressure from the container to a pressure of 1 psig (6.9 kPa) or less nominal 11 inch (279 mm) water column. MAY 25, 2012 LP-GAS REGULATORS - UL 144 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.13 REGULATOR, SPECIAL-PURPOSE HI
46、GH PRESSURE A pressure regulator for LP-Gas designed to reduce the prevailing cylinder, tank or other pressure in excess of 1 psig (6.9 kPa) to a lower pressure. This regulator is not intended for installation in two-stage piping systems that serve 1/2 psi appliance systems. 3.14 REGULATOR, SPECIAL-
47、PURPOSE LOW PRESSURE A pressure regulator for LP-Gas vapor service designed to reduce high pressure or rst stage regulator outlet pressure to a maximum pressure of 1 psig (6.9 kPa) or less. This regulator is not intended for installation in two-stage piping systems that serve 1/2 psi appliance syste
48、ms. 3.15 REGULATOR, TWO PSIG SERVICE A type of regulator for LP-Gas vapor service designed to reduce rst-stage regulator outlet pressure to a pressure of 2.5 psig (17.2 kPa) or less nominal 2 psig (13.8 kPa). 3.16 REGULATOR, INTEGRAL TWO PSIG SERVICE A pressure regulator that combines a high pressur
49、e regulator and a two psig service regulator into a single unit. 3.17 SERVICE-RESERVE INDICATOR A device that gives a visual indication when the regulator system has switched from the designated “service” cylinder to the designated “reserve” cylinder. 3.18 VALVE, TYPE I RELIEF A valve that is constructed to relieve pressure resulting from seat leakage due to the inability of the seat mechanism to achieve lock-up. 3.19 VALVE, TYPE II RELIEF A valve th
