10.0 Appendix

10.1 Saturated steam tables

For calculation equations, information about volume flow rates and flow velocities in pipes (condensate, steam), refer to Chapter 4.0 Pipes.

Equations:

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 in W/m K at approx. 20 °C