1、6 Campus DriveFirst Floor NorthParsippany, New Jersey07054-4406 www.Pumps.org ANSI/HI9.6.6-2016ANSI/HI 9.6.6-2016American National Standard forRotodynamic Pumpsfor Pump PipingThis page intentionally blank.ANSI/HI 9.6.6-2016American National Standard forRotodynamic Pumpsfor Pump PipingSponsorHydrauli
2、c Institute www.Pumps.org Approved March 23, 2016American National Standards Institute, Inc.Hydraulic Institute Standards, Copyright 1997-2016, All Rights ReservedApproval of an American National Standard requires verification by ANSI that therequirements for due process, consensus and other criteri
3、a for approval have been metby the standards developer.Consensus is established when, in the judgement of the ANSI Board of StandardsReview, substantial agreement has been reached by directly and materially affectedinterests. Substantial agreement means much more than a simple majority, but not nec-
4、essarily unanimity. Consensus requires that all views and objections be considered,and that a concerted effort be made toward their resolution.The use of American National Standards is completely voluntary; their existence doesnot in any respect preclude anyone, whether he has approved the standards
5、 or not,from manufacturing, marketing, purchasing, or using products, processes, or proce-dures not conforming to the standards.The American National Standards Institute does not develop standards and will in nocircumstances give an interpretation of any American National Standard. Moreover, noperso
6、n shall have the right or authority to issue an interpretation of an AmericanNational Standard in the name of the American National Standards Institute. Requestsfor interpretations should be addressed to the secretariat or sponsor whose nameappears on the title page of this standard.CAUTION NOTICE:
7、This American National Standard may be revised or withdrawn atany time. The procedures of the American National Standards Institute require thataction be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers ofAmerican National Standards may receive current information on all
8、 standards by call-ing or writing the American National Standards Institute.Published ByHydraulic Institute6 Campus Drive, First Floor NorthParsippany, NJ 07054-4406www.Pumps.org Copyright 2016 Hydraulic InstituteAll rights reserved.No part of this publication may be reproduced in any form, in an el
9、ectronic retrieval system or otherwise, without prior written permission of the publisher.Printed in the United States of AmericaISBN 978-1-935762-48-5AmericanNationalStandardRecycledpaperHydraulic Institute Standards, Copyright 1997-2016, All Rights ReservediiiContentsPageForeword . . . . . . . . .
10、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii9.6.6 Rotodynamic pumps for pump piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.6.6.1 Scope . . .
11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.6.6.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.6.6.3 In
12、let (suction) piping requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.6.6.3.1 Inlet (suction) pipe size/velocity requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.6.6.3.2 Effect of piping-generate
13、d swirl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39.6.6.3.3 Required straight pipe lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39.6.6.3.4 Need for physical hydraulic model study. . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119.6.6.3.5 Use of computational fluid dynamics (CFD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119.6.6.3.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119.6.6.3.5.2 Simulation methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119.6.6.3.5.3 Acceptable use of CFD modeling in pump suction hydraulics. . . . . . . . . . . . . . .
16、 . . . . . . . . 139.6.6.3.6 Pump suction piping/wet-well connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139.6.6.3.7 Pump suction elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139.6.6.3
17、.8 Pump station retrofit or modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149.6.6.4 Outlet (discharge) piping requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149.6.6.4.1 Pipe size/velocity requ
18、irements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149.6.6.4.2 Required straight pipe lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159.6.6.4.3 Recommended valves. . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159.6.6.4.4 Water hammer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169.6.6.5 Inlet and outlet general piping requirements. . . . . . . . .
20、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169.6.6.5.1 Pipe nozzle alignment/pipe expansion load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169.6.6.5.1.1 Pump nozzle flange analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . 179.6.6.5.2 Pipe supports/anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179.6.6.5.2.1 Design considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、. . . . . . . 189.6.6.5.2.2 Cold spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189.6.6.5.2.3 Final installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . 189.6.6.5.2.4 Field adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189.6.6.5.3 Parallel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. 189.6.6.6 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219.6.6.7 Sources of additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229.6.6
25、.8 List of acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Appendix A System curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24A.
26、1 Calculation of the system curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24A.2 Pipe head loss calculation methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Appendix B Water hammer. . . . .
27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28B.1 Water hammer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Hydraulic Institute Standards, Copyri
28、ght 1997-2016, All Rights ReservedivAppendix C Selecting and locating pipe supports and restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32C.1 Restraint and stops. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29、. . . . . . 32C.2 Pipe supports for vertical loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32C.3 Guides and restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34C.4 Tr
30、ue anchors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34C.5 Spring supports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34C.6 Friction fr
31、om supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Appendix D Expansion joints and couplings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36D.1 Expansion joint types .
32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36D.2 Expansion joint application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Appendix E Specialty piping components and ap
33、plications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40E.1 Check valves and strainers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40E.2 Devices to improve flow to the pump . . . . . . . . . . . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41E.3 Piping for suction lift applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42E.4 Solids/slurry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35、. . . . . . . . . . . . . . . . . . . . . . . 43E.5 Air release valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Appendix F Pressure pulsation and acoustic resonance . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、. . . . . . . . . . . . . . 45F.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45F.2 Outlet (discharge) piping acoustics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、 . . . . . . 45Appendix G Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Figures9.6.6.3 Suction pipe design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
38、 . . . . . . . . . . . . . . . . . . . 29.6.6.3.3a General example pump suction with a required L2length from a flow-disturbing fitting . . . . . . . . 59.6.6.3.3b General example pump suction with an allowed fitting connected directly and a required L2length from a flow-disturbing fitting. . . . .
39、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69.6.6.3.3c Specific example horizontal overhung pump suction with a required L2length from a short-radius reducing elbow ( 50% area reduction 0 1Reducers Concentric Eccentric1 pipe size reduction 0 ( 455Continuous-bore valve (100
40、% open) 0 (Ball and gate valves)Eccentric plug valve - rectangular 80% port 4Eccentric plug valve - rectangular 100% port 3Butterfly valveddCare must be taken when placing a butterfly valve downstream from a fitting such as an elbow or tee. The disk should not be oriented such that it could create n
41、onuniform hydraulic conditions and exacerbate a nonuniform hydraulic condition generated by an upstream fitting.2Notes:1) If an allowed fitting is connected directly to the pump (i.e., a concentric reducer of 1-2 pipe size reduction,an eccentric reducer of 1 pipe size reduction, a continuous-bore va
42、lve, or a fitting approved by the pumpmanufacturer), the next fitting upstream from the fitting connected to the pump shall have the number ofpipe diameters referenced in this table between it and the fitting connected to the pump. If several fittingsare adjacent, the longest L2length requirement wi
43、ll govern.2) Valves shall be installed such that the valve operating shafts shall be parallel to the pump shaft on the suc-tion of axially split case pumps.3) Globe valves and diaphragm valves shall not be used on the suction side of the pumps.4) For vertical in-line pumps, elbows may be located in
44、an orientation parallel to the pump shaft within twodiameters for long-radius and three diameters for short-radius elbows.5) Length of pipe between fitting and pump may be reduced from that presented in the above table withapproval of the pump manufacturer.6) Alternative values may be used if they a
45、re substantiated by long-term experience in a particular applicationor by a physical model study.7) The data in this table are based on commercially available fittings.8) Although special flow-straightening devices such as internal ribs, vanes, or other arrangements have beenapplied successfully, su
46、ch devices are beyond the scope of this document at this time.Hydraulic Institute Standards, Copyright 1997-2016, All Rights ReservedHI Rotodynamic Pumps for Pump Piping 20165allowed fitting is connected directly to the pump; in this case, the pipe diameter D2 shall match the upstream endof the allo
47、wed fitting size, reference Figures 9.6.6.3.3b, d, f, h, and i). The velocity requirements of Section 9.6.6.3.1do not apply to this section of pipe (i.e., the L2/D2section). If several fittings are adjacent, the fitting with the longestlength requirement will govern and that length requirement shall
48、 be applied to the most downstream fitting (refer-ence Figures 9.6.6.3.3f, g, and i). Failure to provide the minimum pipe lengths specified in Table 9.6.6.3.2 can leadto the hydraulic and mechanical issues described in the first paragraph of this section. Double suction pumps are asensitive applicat
49、ion because an elbow in the plane of the shaft mounted on the suction flange will direct more flowto one side of the impeller than the other (see Figure 9.6.6.3.3k). Figure 9.6.6.3.3l shows examples of flow-disturb-ing fittings attached directly to the pump that require approval by the pump manufacturer (any fitting attacheddirectly to the pump that is not specifically allowed by Table 9.6.6.3.2 requires pump manufacturer approval).L2D2-Figure 9.6.6.3.3a General example pump suction with a required L2length from a flow-disturbing fittingHydraulic Institute Stan
