What is the Hydraulic Institute?
The Hydraulic Institute is an association of pump industry manufacturers in North America that develops and publishes the most frequently cited pump standards for the water and wastewater applications.
Most centrifugal pumps procured for water or wastewater applications – including those in the municipal, HVAC, plumbing, industrial, and fire-protection markets – are designed in accordance with Hydraulic Institute Standards. Some of the most-used HI Standards include:
- Hydraulic Performance Acceptance Tests ANSI/HI 14.6: Testing methods and acceptance grades are defined for all types of rotodynamic (centrifugal) pumps other than submersible pumps.
- Hydraulic Performance, Hydrostatic Pressure, Mechanical, and Electrical Acceptance Tests ANSI/HI 11.6: Testing methods and acceptance grades are defined for submersible pumps.
- Vibration Analysis and Allowable Values ANSI/HI 9.6.4: This standard defines acceptable vibration levels for all types of centrifugal pumps.
- General Guidelines ANSI/HI 9.1-9.5: This standard defines basic pump types, materials of construction, and sound testing guidelines and procedures.
- HI Program Guide for Pump Test Laboratory Approval HI 40.7: This standard establishes a pump test lab inspection, approval, and audit program.
- Manuals Describing Installation, Operation, and Maintenance ANSI/HI 1.4: This manual is designed to assist pump manufacturers in developing IOM manuals.
- Guideline for NPSH Margin ANSI/HI 9.6.1: This guideline assists pump system designers and specifiers to determine the appropriate margin that should be maintained between the NPSH available at pump suction (NPSHa) and the NPSH required by the pump (NPSHr or NPSH3).
- Pump Intake Design ANSI/HI 9.8: This standard assists pump station designers to properly size and design pump intake structures.