This episode I'm doing something a little different. These are some of my study notes from back when I was Pipefitting school.
The following numbers are the constants discussed in this podcast relevant to the pipe trades.
3.14 =Pi
4°C = water at most dense
39°F = water at most dense
0°C = freezing point of water
32°F = freezing point of water
7.5% = how much water expands when it freezes
100°C = boiling point of water
212°F = boiling point of water
1700 = times water expands volume from water to steam
2 kj/kg/°C = sensible heat of ice
0.5 btu/lb/°F = sensible heat of ice
335 kj/kg = latent heat required to change ice to water
144 btu/lb = latent heat required to change ice to water
4.2 kj/kg/°C = sensible heat of water
1 btu/lb/°F = sensible heat of water
2257 kj/kg = latent heat required to vaporize water to steam
970 btu/lb = latent heat required to vaporize water to steam
2 kj/kg/°C = sensible heat required to raise steam temperature
0.5 btu/lb/°F = sensible heat required to raise steam temperature
0.433 = psi per 1 foot head of water
0.0361 = psi per 1 inch head of water
2.31 ' = 1 psi
27.7 " = 1 psi
62.4 lbs = 1 cubic foot of water
10 lbs = 1 imperial gallon
6.24 = imperial gallons in a cubic foot
0.833 imperial gallons = 1 US gallon
1.2 US gallon = 1 imperial gallon
150 btu per EDR of water
240 btu per EDR of steam
121°C = max temperature of low pressure boiler
250°F = max temperature of low pressure boiler
15 psi = max working pressure of low pressure boiler
33, 475 btu = one boiler horsepower
34.5 lbs of water into steam @ 212°F/100°C = 1 BHP
(°F - 32) / 1.8 = °C
(°C x 1.8) + 32 = °F
2.54 cm = 1 inch
25.4 mm = 1 inch
2.2 lbs = 1 kg
0.24 btu/lb/°f = specific heat capacity of air
1 = relative density of water and air
13.6 = relative density of mercury
0.076 lb = weight of 1 cubic foot of air @STP
14.7 psi = atmospheric pressure @ sea level
29.92" mercury = one atmosphere
760 mm = one atmosphere
30° = angle used on isometric drawings
Best of luck in your journey studying!
8 Mar 2025
Fresh Start
The host reflects on the podcast's origins and expresses renewed enthusiasm for audio editing and engaging with interesting individuals.
15 Sept 2018
Ep 17 | This Is A Man's World | Michelle Hands
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