1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 448C Stationary, Rotary-Type, Positive-Displacement Pumps for Fire-Protection ServiceUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
2、LUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Stationary, Rotary-Type, Positive-Displacement Pumps for Fire-Protection Service, UL 448C First Edition, Dated February 2, 2009 Summary of Topics These revisions to
3、ANSI/UL 448C include the following changes in requirements: Clarication and Updating of Requirements Related to Pump Construction, Performance Testing and Marking Revised Marking Requirements Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a ve
4、rtical 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 new requirements are substantially in accordance with Pro
5、posal(s) on this subject dated January 31, 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 prior permission of UL. UL provides this St
6、andard 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 similar damages, including loss of prots, lo
7、st savings, loss of data, or any other damages arising 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 Standar
8、d, 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) resulting from any error or deviation
9、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 effective dates as indicated in the note foll
10、owing 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. APRIL 10, 2014 UL 448C tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS
11、TRIBUTION WITHOUT PERMISSION FROM UL APRIL 10, 2014 UL 448C tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 2, 2009 (Title Page Reprinted: April 10, 2014) 1 UL 448C Standard for Stationary, Rotary-Type, Posit
12、ive-Displacement Pumps for Fire-Protection Service Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Stationary, Rotary-Type, Positive-Displacement Pumps for Fire-Protection Service, SU 448C. First Edition February
13、2, 2009 This ANSI/UL Standard for Safety consists of the First Edition including revisions through April 10, 2014. The most recent designation of ANSI/UL 448C as an American National Standard (ANSI) occurred on April 9, 2014. The ANSI approval for this standard does not include the Cover Page, Trans
14、mittal 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 Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards
15、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 shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES I
16、NC. ANSI/UL 448C-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 2, 2009 UL 448C 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCT
17、ION 1 Scope .4 2 Components 4 3 Units of Measurement .5 4 Undated References 5 5 Glossary .5 CONSTRUCTION 6 General 6 7 Pump Casings 7 8 Rotors and Other Internal Components 8 9 Ball and Roller Bearings .8 10 Sleeve Bearings .9 11 Shaft Seals .9 12 Relief Valve 10 PERFORMANCE 13 Hydraulic Performanc
18、e Test 10 14 Hydrostatic Strength Tests .11 15 Dry Operation and Self-Priming Tests .12 16 Endurance Test 12 17 Relief Valve Operation, Flow Capacity and Reseat Tests 13 18 Relief Valve Leakage Test .13 19 Relief Valve Spring Cycling Test 13 MANUFACTURING AND PRODUCTION TESTS 20 General 14 MARKINGS
19、21 General 14 FEBRUARY 2, 2009 UL 448C 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover stationary, rotary type, positive displacement pumps intended for supplying water or foam liquid concen
20、trates to re protection systems. 1.1 revised April 10, 2014 1.2 The pumps covered by these requirements are intended to be installed in accordance with the Standard for Installation of Stationary Pumps for Fire Protection, NFPA 20. 1.2 effective February 2, 2011 2 Components 2.1 Except as indicated
21、in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.1 effective February 2, 2011 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 com
22、ponent in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.2 effective February 2, 2011 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.3 effective February 2, 2011 2.4 Specic components are i
23、ncomplete 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 limits, and shall be used only under those specic conditions. 2.4 effective February 2, 2011 APRIL 10,
24、2014 UL 448C 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.1 effective February 2, 2011
25、4 Undated References 4.1 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. 4.1 effective February 2, 2011 5 Glossary 5.1 For the purposes of this standard, the following denitio
26、ns apply. 5.1 effective February 2, 2011 5.2 CORROSION-RESISTANT MATERIAL A material having resistance to corrosion equivalent to or exceeding that of a brass or bronze alloy, or series 300 stainless steel. 5.2 effective February 2, 2011 5.3 FOAM LIQUID CONCENTRATES Concentrated liquid lm foaming ag
27、ents and other additives intended to enhance the re ghting effectiveness of the water. 5.3 revised April 10, 2014 5.4 PRESSURE, MAXIMUM WORKING For performance tests specied in this standard, the sum of the maximum net pressure developed by the pump and the maximum positive suction pressure marked o
28、n the pump, under any condition of intended use including the relief valve discharging 100 percent of the pump capacity with the valve set at its highest pressure setting. For production tests, this value may be lower, based on the conditions imposed by the particular installation for which the pump
29、 is constructed. Therefore, the values of maximum net pressure and maximum positive suction pressure that are marked on the pump are those that indicate the acceptability of a pump (the limiting pressures) for an installation. 5.4 effective February 2, 2011 5.5 PRESSURE, NET (TOTAL HEAD) The algebra
30、ic difference in psi (kPa) between pressures measured at the discharge ange and at the suction ange, corrected to the pump centerline and corrected for differences in velocity head at the points of gauge attachment. 5.5 effective February 2, 2011 5.6 PUMP LOAD The brake horsepower (kW input) require
31、d to drive a pump at rated speed, and at the capacity and net pressure (including the additional requirements associated with the operation of the relief valve) requiring maximum power for its intended use. 5.6 effective February 2, 2011 5.7 PUMP, ROTARY TYPE POSITIVE DISPLACEMENT A pump characteriz
32、ed by the use of gears, screws, lobes, cams or similar elements to carry and displace liquid. 5.7 effective February 2, 2011 5.8 PUMP ROTOR A gear or similar element used to carry and displace liquid. 5.8 effective February 2, 2011 APRIL 10, 2014 UL 448C 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F
33、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.9 RELIEF VALVE A valve capable of automatically relieving 100 percent of pump capacity at a pressure not exceeding 125 percent of the valve set pressure. 5.9 effective February 2, 2011 5.10 SET PRESSURE Internal pressure at which the r
34、elief valve is intended to start to allow the ow of water. 5.10 effective February 2, 2011 CONSTRUCTION 6 General 6.1 These requirements are intended to address rotary type, positive displacement pumps for re protection systems. This is not intended to preclude the investigation of pumps having diff
35、erent design features as long as an equivalent level of performance is provided. 6.1 effective February 2, 2011 6.2 A casting shall be smooth and free from scale, lumps, cracks, blisters, sand holes, and defects of any nature that may affect the use for which it is intended. A casting shall not be p
36、lugged or lled, but may be impregnated to remove porosity. 6.2 effective February 2, 2011 6.3 A bolt, stud, cap screw, or gland swing bolt used to assemble parts subject to stress due to uid pressure shall have a nominal diameter of not less than 1/4-inch (6.4 mm). 6.3 effective February 2, 2011 6.4
37、 An interior bolt or screw that is exposed to pumped uid shall be a corrosion-resistant material. 6.4 effective February 2, 2011 6.5 The maximum stress on any bolt of a pressure-holding structure shall not exceed one-fourth the elastic limit of the material as computed by using the stress area. The
38、stress area is dened by the equation: in which: A s is the stress area in square inches (m 2 1550); D is the nominal diameter of bolt in inches (mm 0.04); and n is the number of threads per inch (25.4 mm). 6.5 effective February 2, 2011 FEBRUARY 2, 2009 UL 448C 6UL COPYRIGHTED MATERIAL NOT AUTHORIZE
39、D FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.6 The load on the bolts is to be computed on the basis of the internal uid pressure equivalent to the maximum working pressure over the area out to the centerline of the bolts. 6.6 revised April 10, 2014 6.7 The maximum combined
40、 shear stress for a pump shaft shall not exceed 30 percent of the elastic limit in tension or be more than 18 percent of the ultimate tensile strength of the shafting steel used. Compliance with this requirement is to be veried by a review of manufacturers stress calculations 6.7 effective February
41、2, 2011 6.8 Flange dimensions and bolt layouts used in pipe connections shall comply with the requirements in the Standard for Cast Iron Pipe Flanges and Flanged Fittings, ANSI/ASME B16.1, or other national or international pipe ange standards. 6.8 effective February 2, 2011 6.9 A threaded opening u
42、sed for pipe connection shall comply with the requirements in the Standard for Pipe Threads, General Purpose, ANSI/ASME B1.20.1, or other national or international pipe thread standards. 6.9 effective February 2, 2011 6.10 Grooved end connections shall comply with the requirements in the Standard fo
43、r Grooved and Shouldered Joints, ANSI/AWWA C606, or other national or international grooved standards. 6.10 effective February 2, 2011 7 Pump Casings 7.1 The pump casing shall be constructed of a corrosion resistant material and designed to permit examination of rotors and other interior parts witho
44、ut disturbing suction or discharge piping. 7.1 effective February 2, 2011 7.2 The pump shall be provided with feet or provisions for accommodating feet or a fabricated base support, such as bolt holes and a bearing area for attaching the base to the pump. 7.2 effective February 2, 2011 7.3 A drain o
45、pening shall be provided so that all parts of the pump casing can be drained. The opening shall be threaded to receive a plug that is not smaller than 1/8-inch nominal pipe size. 7.3 effective February 2, 2011 APRIL 10, 2014 UL 448C 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
46、 DISTRIBUTION WITHOUT PERMISSION FROM UL 8 Rotors and Other Internal Components 8.1 The rotor, wear ring liners, interior nuts, glands, sleeve bearings, drain plugs and other interior components shall be constructed of a corrosion-resistant material. 8.1 effective February 2, 2011 8.2 The rotors sha
47、ll be secured in an axial direction on the pump shaft or hydraulically balanced, permitting no contact with the casing under operating conditions. 8.2 effective February 2, 2011 9 Ball and Roller Bearings 9.1 Ball and roller bearings shall have an L-10 rating of not less than 5000 hours at maximum p
48、ump load (maximum hydraulic load on the largest rotor operated at any point on its rated speed curve) in accordance with the Standard for Load Ratings and Fatigue Life for Ball Bearings, ANSI/ABMA 9, and the Standard for Load Ratings and Fatigue Life for Roller Bearings, ANSI/ABMA 11, respectively.
49、9.1 effective February 2, 2011 9.2 With reference to 9.1, the L-10 rating in hours is to be calculated from the L-10 rating in revolutions based on the following equation: L h =( L 10 x1 0 6 )/( Nx6 0 ) in which: where: L h is the L-10 rating in hours; L 10 is the L-10 rating in millions of revolutions; N is the rated speed in revolutions per minute; C is the dynamic load rating of bearing in pounds-force; P is the combined force on bearing in pounds; FEBRUARY 2, 2009 UL 448C 8UL COPYRIGHTE
