conversion of psi to water column

Disscussing old, rare, very specific or otherwise uncommon units and measurements


conversion of psi to water column

Postby rrrservant » Tue Sep 16, 2008 2:36 am

how do I convert 1.5 psi for natural gas to water column

Postby Guest » Mon Oct 27, 2008 6:50 pm

water weighs 62.4 pounds per cubic foot.
There are 1,728 cubic inches in a cubic foot.
62.4/1,728 = weight (in pounds) of a cubic inch of water. (0.036111 pounds)
That cubic inch has a base area of 1 square inch and in one inch tall and weighs
0.036111 pounds for every inch taller you make it.

1 PSI takes 1/.036111 inches of water to equate. (27.692" column of water with a base area of one square inch weighs 1 pound)

"Head pressure" is often stated in untis of "feet."
Divide 27.692" by 12 to get feet of head in 1 psi
(2.3077 ft of head = 1 psi)

The inverse is the PSI in one ft of head.
(1/2.3077) or 0.433PSI = 1 ft. of head.

Tom Stacy

Re: conversion of psi to water column

Postby Guest » Mon Sep 09, 2013 11:59 pm

This doesn't take into account that the density of water listed is in pound mass and pressure is in pound force though. You have to go through and convert from mass to force.

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