10.1 Saturated steam tables
10.2 Superheated steam tables
10.3 Symbols used, units
10.4 Conversion factors for units
10.5 Flow velocities in pipes
For calculation equations, information about volume flow rates and flow velocities in pipes (condensate, steam), refer to Chapter 4.0 Pipes.
Equations:
10.6 Recommended values in technical literature
For calculation equations, information about volume flow rates and flow velocities in pipes (condensate, steam), refer to Chapter 4.0 Pipes.
Equations:
| Steam | w (m/s) | |
| - Steam vent or flash steam | 15 to 25 m/s | |
| - Saturated steam pipes | 20 to 40 m/s | |
| - Low-pressure superheated steam | Less than 10 bar | 20 to 35 m/s |
| - Medium-pressure superheated steam | 10 to 40 bar | 20 to 40 m/s |
| - High-pressure superheated steam | 40 to 125 bar | 30 to 60 m/s |
| - High-pressure superheated steam | High capacities | 45 to 65 m/s |
| Water | ||
| - Feedwater inlet pipes (suction pipes) | 0.5 to 1.0 m/s | |
| - Feedwater discharge pipes | 1.5 to 3.5 m/s | |
| - Feedwater preheaters | 0.01 to 0.15 m/s | |
| - Cooling water suction pipes | 0.7 to 1.5 m/s | |
| - Cooling water discharge pipes | 1.0 to 4.5 m/s | |
| - Condensate pipes, slightly sub-cooled condensate | 0.5 to 1.0 m/s | |
| - Condensate pipes, increased sub-cooling of condensate | 1.0 to 2.0 m/s | |
| - Drinking, service water main pipes | 1.0 to 3.0 m/s | |
| - Local drinking, service water systems | 0.6 to 1.0 m/s | |
| - Turbine pipes, small diameter | 2.0 to 4.0 m/s | |
| - Turbine pipes, large diameter | 3.0 to 7.0 m/s | |
| Gases | ||
| - Gas pipes | Max. 2 bar | 4.0 to 20 m/s |
| - Gas pipes | Max. 5 bar | 11 to 35 m/s |
| - Gas, household pipes | Max. 1.0 m/s | |
| - Compressed air pipes | 15 to 25 m/s | |
| Oils, naphthas | ||
| - Oil pipelines | 1.5 to 2.0 m/s | |
| - Heavy oil pipes | 0.5 to 2.0 m/s | |
| - Naphtha, benzene, gas oil pipes | 1.0 to 2.0 m/s |
Coefficients of thermal conductivity (λ), heat transfer (α) and heat transmission (k)
Coefficients of thermal conductivity λ in W/m K at approx. 20 °C
