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HI: Hydraulic Institute
HI, the Hydraulic Institute, is a nonprofit organization that develops and publishes pump standards. Headquartered in Parsippany, United States, HI membership includes most major U.S. pump manufacturers as active members. With HI standardization efforts closely linked to those of several other SDOs, HI influence goes on to spread far beyond even its own robust membership. Standards from HI are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: [email protected] or 1-212-642-4980 or Request Proposal Price.
Below are HI's best-selling standards. To find additional standards, please use the search bar above.
ANSI/HI 9.6.2-2021
Rotodynamic Pumps for Assessment of Applied Nozzle Loads
In this revision, the committee developed new content on nozzle load evaluations including: mechanical pipe strain forces, hydraulic pressure reaction forces, thermal growth or contraction forces, pump casing stresses and deformation, relative movement between stationary and rotating components, shaft misalignment, hold down bolts, base plate stresses and deflection, and anchor-bolt stresses. In addition, normative content was added or updated to address material adjustment factors related to temperature.
ANSI/HI 14.6-2022
Rotodynamic Pumps for Hydraulic Performance Acceptance Tests
This standard provides acceptance criteria and uniform procedures for performance, net positive suction head, and hydrostatic pressure testing, and data recording and reporting of test results for rotodynamic pumps. It provides acceptance grades that can be specified for various types of applications. It also defines test procedures that will result in consistent and repeatable results.
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ANSI/HI 9.6.6-2022
Rotodynamic Pumps for Pump Piping
This is a revision of the 2016 edition. This standard applies to inlet (suction) and outlet (discharge) piping for rotodynamic pumps in all worldwide markets. It identifies and details the required and recommended practices forpump piping. Major updates in this revision includes a format change to aid users to more easily identify and reference requirements of the standard. Technical updates were made throughout the standard, and changes to some straight pipe length requirements following flow disturbing fittings and prior to the pump inlet were made.
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ANSI/HI 9.6.4-2022
Rotodynamic Pumps for Vibration Measurement and Allowable Values
This standard applies to rotodynamic pumps and covers the evaluation of vibration when the vibration measurements are made on stationary parts associated with bearings (bearing housings). It provides specific maximum allowable vibration values measured on bearing housings of rotodynamic pumps in field and factory test environments. Topics covered in this standard include bearing housing vibration measurement, speeds above and below 600 rpm, vibration measurement instrumentation, vibration acceptance levels for field and factory tests, acceptance test installation and operating conditions, allowable pump bearing housing vibration, suggested vibration test report, factors affecting vibration, vibration criteria at the top of the motor for vertical pumps.
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ANSI/HI 9.8-2024
Rotodynamic Pumps for Pump Intake Design
This standard applies to the design of new intakes as well as the modification of existing designs used with rotodynamic pumps. It outlines standard intake designs based on certain criteria, beyond which requires a physical model study to be in compliance with the standard. Ideally, the flow of liquid into any pump should be uniform, steady, and free from swirl and entrained air. Lack of uniformity at the pump inlet can result in reduced performance, lower efficiency, cavitation, elevated noise and vibration, and other items that result in reduced reliability. Those involved in the design or use of pumps systems that are clean or include solids bearing liquid with free surface intakes that are rectangular, circular, or suction can types should use this standard. Free surface pump intakes are applicable to all industry segments but are most common in municipal water and wastewater, chemical, oil & gas, power generation, cooling water and cooling towers. What’s New: This standard supersedes the ANSI/HI 9.8-2018 edition. Updates in the new edition include: • Revision to physical model study requirement for closed-bottom suction can pumps. • Improved guidance on pump operating conditions that influence intake design. • Updates and additions to terms and definitions. • Updates to content and figures that clarify or improve existing materials.
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ANSI/HI 9.6.1-2017
Rotodynamic Pumps Guideline for NPSH Margin
The purpose of this guideline is to establish recommended net positive suction head available (NPSHA) above the published NPSH required (NPSHR) that will lead to acceptable pump performance and service life.
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ANSI/HI 11.6-2017
Rotodynamic Submersible Pumps: for Hydraulic Performance, Hydrostatic Pressure, Mechanical and Electrical Acceptance Tests
This standard applies to customer acceptance testing of rotodynamic submersible pumps driven by electric motors, unless otherwise agreed or specified. A submersible pump is defined as a close-coupled pump/motor unit designed to operate submerged in the pumped liquid. This definition includes submersible pumps operating in either a wet-pit or dry-pit environment.
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ANSI/HI 9.6.7-2021
Rotodynamic Pumps - Guideline for Effects of Liquid Viscosity on Performance
ANSI/HI 9.6.7 outlines the method for predicting performance of Rotodynamic pumps in Newtonian liquids of viscosity greater than water. The scope of this guideline is the Rotodynamic radial flow pumps of overhung (OH) between bearing (BB) or vertical (VS) type of convential design, within the allowable operating range, pumping Newtonian fluids. What's New: The 2021 edition of ANSI/HI 9.6.7 includes editorial changes from prior publications related to standard deviation for correction factors. Additional clarification on the uncertainty of viscous power consumption is included. What You Will Learn/Overall Benefits: · Understand the effects of viscous liquids on pump performance related to flow, head pressure and required horsepower · Predict the change in pump performance when handling viscous liquids to ensure the correct selection of a pump for use in a specific liquid Applicable Markets: Oil and gas, petroleum refinery, chemicals, pharmaceuticals and any industry using liquids heavier than water.
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ANSI/HI 9.6.3-2024
Rotodynamic Pumps – Guideline for Operating Regions
This standard defines the preferred operating region (POR) for rotodynamic pumps based on pump specific speed. The allowable operating region (AOR) is defined, along with application and design factors that are considered by the manufacturer in the setting of the AOR are detailed. The reader will learn the effects of operating away from the pumps best efficiency point (BEP). This guideline applies to rotodynamic pumps in all markets. It aids the specifying engineer and system designer with a base understanding of pump operating regions, which supports pump selection and the design of the system to achieve reliable and efficiency operation. The pump end user should reference this guideline to understand potential causes of inefficient operation and reliability issues.
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ANSI/HI 9.6.5-2022
Rotodynamic Pumps Guideline for Condition Monitoring
This guideline offers fundamentals of condition-based maintenance for rotodynamic pumps, including monitoring and failure detection techniques for both sealed and sealless designs. Pump condition monitoring methods and control limits are outlined for the monitoring of power, temperature, corrosion, leakage, pressure, vibration, lubricant, flow rate, pump speed, and bearing wear monitoring. This is a revision of the 2016 guideline, which includes some major changes in the document listed below 1. A new section on Pump erosion wear monitoring has been added. 2. Condition based maintenance has been incorporated in the standard. 3. Critical & Safety condition monitoring has been added.
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