
231
C Reference
Table C.2:
Typical Roughness Coefficients of Pipes
The values are based on experience and measurements.
material
absolute roughness
[mm]
drawn pipes of non-ferrous metal,
glass, plastics and light metal
0…0.0015
drawn steel pipes
0.01…0.05
fine-planed, polished surface
max. 0.01
planed surface
0.01…0.04
rough-planed surface
0.05…0.1
welded steel pipes, new
0.05…0.1
after long use, cleaned
0.15…0.2
moderately rusted, slightly encrusted max. 0.4
heavily encrusted
max. 3
cast iron pipes:
bitumen lining
> 0.12
new, without lining
0.25…1
rusted
1…1.5
encrusted
1.5…3
Содержание FLUXUS G704
Страница 4: ......
Страница 174: ...174 UMG70XV3 4EN 12 01 2009 FLUXUS G709 dimensions in mm 198 1 208 25 129 222 2 15 122 5 110 M2 5 43 7 213 129 170 5...
Страница 235: ...UMG70XV3 4EN 12 01 2009 235 D Certificates D Certificates...
Страница 236: ...236 UMG70XV3 4EN 12 01 2009 D Certificates...
Страница 237: ......
Страница 238: ......
Страница 239: ......
Страница 240: ...UMG70XV3 4EN 12 01 2009 D Certificates...
Страница 241: ......
Страница 242: ......
Страница 243: ......
Страница 244: ......
Страница 245: ......
Страница 246: ......
Страница 247: ......
Страница 248: ......
Страница 249: ......
Страница 250: ......
Страница 251: ......
Страница 252: ......
Страница 253: ......
Страница 254: ......
Страница 255: ......
Страница 256: ......
Страница 257: ......