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#1
03-20-2006, 11:04 AM
 Charles Guest Posts: n/a
In Wg Conversion

What does "In Wg" stand for? It is being used on a pressure chart.
#2
03-23-2006, 02:07 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,416 Rep Power: 12
Re: In Wg Conversion

in wg stands for inch water gauge, another name for the inch water column or just inch of water.

The gauge means its read from a gauge, which actually measures the difference between the pressure in the pipe and the pressure of the atmosphere.
#3
05-29-2007, 11:12 AM
 Unregistered Guest Posts: n/a
Re: In Wg Conversion

How do you convert 1 In Wg to kPa?
#4
05-30-2007, 12:02 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,416 Rep Power: 12
Re: In Wg Conversion

Quote:
 Originally Posted by Unregistered How do you convert 1 In Wg to kPa?
You can find both those units on the Pressure conversion page.
http://www.onlineconversion.com/pressure.htm

1 inch of water [4 °C] = 0.249 088 908 kilopascal
#5
04-21-2009, 02:52 PM
 Unregistered Guest Posts: n/a
Re: In Wg Conversion

In wg is often used as a unit of pressure (inches of water) and is not a standard engineering unit of pressure. (Let's say that its a slang term, probably from the Navy) The standard engineering unit is inches of water (in H2O, in W or in WC for column of water).
#6
04-22-2009, 03:38 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,383 Rep Power: 11
Re: In Wg Conversion

Quote:
 Originally Posted by Unregistered In wg is often used as a unit of pressure (inches of water) and is not a standard engineering unit of pressure. (Let's say that its a slang term, probably from the Navy) The standard engineering unit is inches of water (in H2O, in W or in WC for column of water).
Not where most people live.
#7
04-22-2009, 04:10 PM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,232 Rep Power: 18
Re: In Wg Conversion

True, and expressing the column height in millimeters won't help much either.

Water is cheap, but, at best, a poor man's reference standard with very modest accuracy when used as a standard for density, heat capacity, or pressure.

Columns of fluid really aren't very good pressure standards as they depend on the fluid density which varies with temperature (and pressure) and local gravity, which usually isn't "standard" gravity. It is a rough indicator.
#8
10-11-2009, 08:21 AM
 Unregistered Guest Posts: n/a
Re: In Wg Conversion

Quote:
 Originally Posted by Unregistered How do you convert 1 In Wg to kPa?
how much is 90 wg in bar
#9
10-11-2009, 10:50 AM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,232 Rep Power: 18
Re: In Wg Conversion

Quote:
 Originally Posted by Unregistered how much is 90 wg in bar
90 WHAT? Water gauge may use units of inches, feet, millimeters, centimeters, meters, etc. If it is really the height of a column of water, you need to know temperature and local gravity. The pressure is equal to rho*g*h, where rho is density, which depends on temperature, g is local (or standard) gravity, and h is height.
#10
12-01-2009, 05:12 PM
 ferambiental Guest Posts: n/a
Re: In Wg Conversion

You usually use "in wg" as a parameter to choose an equipment that need to work into tanks, so you will choose an equipment as minimum has a diferencial pressure as the depth of the tank.

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