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.