pGina is a pluggable, open source credential provider (and GINA) replacement. It allows for alternate methods of interactive user authentication and access management on machines running the Windows operating system.
Founded in 1917, the is the largest association of pump manufacturers and suppliers in North America. HI develops standards that are harmonized with ISO and ANSI. Among its most enduring publications is the Pipe Friction Manual , now incorporated into the broader HI standards suite.
Tables of resistance coefficients ( ) and equivalent length (
Using the official HI data ensures that designs comply with established industry benchmarks, minimizing risks of cavitation, pump failure, or system underperformance. Core Components: Understanding Pipe Friction
It covers not just straight pipes, but also older pipes with scale buildup, valves, bends, tees, and contractions. Core Methodologies and Formulas
No, not legally. HI relies on sales to fund standards development. However, check if your employer or school has a site license. hydraulic institute pipe friction manual pdf
Covers both water and viscous liquids across industrial, municipal, and commercial use.
The manual addresses a fundamental engineering challenge: . As a fluid flows through a pipe, it experiences resistance due to the viscosity of the fluid and the roughness of the internal pipe walls. This resistance causes a drop in pressure, commonly referred to as "head loss." The HI manual provides the exact metrics needed to quantify this loss across various pipe materials, diameters, and fluid types. Core Engineering Principles Covered
The manual heavily utilizes the Darcy-Weisbach equation, which is widely considered the most accurate formula for calculating pipe friction loss:
Key Contents
Help you find specific friction factors for pipes in the .
Without the HI manual, you might use outdated roughness or ignore temperature effects on viscosity, leading to a 20% error.
Add the straight pipe friction loss to the fitting friction loss. This gives you the total system friction head, which dictates how much pressure your pump must generate. How to Access the Authorized Hydraulic Institute Manual
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Founded in 1917, the is the largest association
The official, fully updated version of the manual has been integrated into broader standards, primarily and relevant engineering data books published directly by the institute.
Field engineers can carry the complete manual on tablets or laptops for on-site troubleshooting and system verification. Authorized Procurement
Guidelines and conversion factors for fluids more viscous than water, such as crude oil, chemical polymers, and food products. Valves and Fittings (K-Factors): Resistance coefficients (
pGina comes with a lot of plugins out of the box (MySQL, LDAP, Logging, Single User, ...). All of the built-in plugins are documented in our documentation pages. However, the whole point of having a plugin model is so that you, the end user, can choose the method and style of user authentication, authorization and management that you wish to use.