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Pipe Sizing - Roughness figures and equivalent range selection

  Product(s): Bentley Hevacomp
  Version(s): V8i (N/A)
  Environment: N/A
  Area: N/A
  Subarea: N/A

Method

The following figures are used by the Netsys Pipe sizing program.

    Range  Roughness     Range  Roughness     Range  Roughness
Steel BS 1387 Medium     0.046 Steel BS 1387 Heavy     0.046 Galvanised BS 1387     0.15
Copper BS 2871 Table X     0.0015 Copper BS 2871 Table Y     0.0015 Copper BS 2871 Table Z     0.0015
PVC-U BS 3505 Class E     0.003 Mapress DIN 2394 Heating Pipes     0.01 Mapress DVGW W 541 Water Pipes     0.0015
Microbore Pipework BS 2871 Table X     0.003 Microbore Pipework BS 2871 Table Y     0.003 MDPE (80) for gas upto 3 bar     0.003
MDPE (80) for gas upto 5.5 bar     0.003 Polybutylene PB 4137     0.007 MDPE (80) For Water upto 8 bar     0.003
MDPE (80) For Water upto 12.5 bar     0.003 ISO Stainless Steel Pipes T=1.6 to 2.6     0.005 PVC-C     0.007
ABS Pipework PN10     0.003 ClimaTherm SDR 7.4     0.007 ClimaTherm SDR 11     0.007
FusioTherm SDR 11     0.007 Fusiotherm Faser SDR 7.4     0.007 Copper BS 2871 Table X Full Range     0.0015
Rautherm Universal/S     0.007 Rautherm Universal/RAUHIS     0.007 Rautherm Universal     0.007
Rautherm S     0.007 RAUHIS     0.007 Rautherm Pipe in Corrugated Sleeve     0.007
Uponor MLC (Unipipe) Pipework     0.0004 Yorkshire Fittings Xpress Galvanised CS     0.01 Yorkshire Fittings Xpress Copper     0.0015
Friatherm Hot/Cold Pipework System     0.007 SuperFlo Chilled/Cold Water (3m)     0.003 SuperFlo Chilled/Cold Water (6m)     0.003
Wefatherm Pipe System PPR (SDR 11)     0.007 Wefatherm Pipe System PPR (SDR 7,4)     0.007 Wefatherm Pipe System PPR (SDR 6)     0.007
Wefatherm Stabi System PPR (SDR 6)     0.007 Wefatherm Stabi System PPR (SDR 6/UV)     0.007 Wefatherm Fiber System PPR (SDR 7,4)     0.007
Geberit Mapress Carbon Steel System     0.01 Geberit Mapress Stainless Steel System     0.0015 Geberit Mapress Copper System     0.001
Geberit Mepla System     0.007  

If you are using this information to help choose an equivalent pipe range to one we have not considered, this table of pipe sizes should be useful. The Netsys program sizes using the Nominal diameter of its pipe types.

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