Pipe sizing - Pipe Sizing Standards

Duncan Brown — Thu, 18 Jan 2018 12:13:04 GMT

Current Revision posted to Hevacomp Wiki by Duncan Brown on 1/18/2018 12:13:04 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The Design flow rate can then be obtained from Figure B.1, BS EN 806-3, which plots Total flow rate (x-axis, LU) vs Design flow rate (y-axis, l/s), alongside values for the highest single Loading unit. Below, the total flow rate is highlighted in yellow, and the highest single loading unit is highlighted in red:

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

Tags: BS 806-3, results, Standards, netsys, V26, Bentley Hevacomp, BS 6700

Pipe sizing - Pipe Sizing Standards

Duncan Brown — Thu, 18 Jan 2018 11:19:32 GMT

Revision 10 posted to Hevacomp Wiki by Duncan Brown on 1/18/2018 11:19:32 AM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

Tags: BS 806-3, results, Standards, netsys, V26, Bentley Hevacomp, BS 6700

Netsys Pipe Sizing Standards

Duncan Brown — Tue, 07 Feb 2017 12:56:03 GMT

Revision 9 posted to Hevacomp Wiki by Duncan Brown on 2/7/2017 12:56:03 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

Tags: BS 806-3, results, Standards, netsys, V26, Bentley Hevacomp, BS 6700

Netsys Pipe Sizing Standards

Shane Regan — Fri, 21 Oct 2016 13:33:57 GMT

Revision 8 posted to Hevacomp Wiki by Shane Regan on 10/21/2016 1:33:57 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

___________________________________

Existing projects from previous versions of Hevacomp will remain set to BS 6700. All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

___________________________________

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

Tags: BS 806-3, results, Standards, netsys, V26, Bentley Hevacomp, BS 6700

Netsys Pipe Sizing Standards

Duncan Brown — Tue, 10 Mar 2015 12:47:00 GMT

Revision 7 posted to Hevacomp Wiki by Duncan Brown on 3/10/2015 12:47:00 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Duncan Brown — Tue, 02 Dec 2014 16:30:49 GMT

Revision 6 posted to Hevacomp Wiki by Duncan Brown on 12/2/2014 4:30:49 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Shane Regan — Fri, 17 Oct 2014 12:23:58 GMT

Revision 5 posted to Hevacomp Wiki by Shane Regan on 10/17/2014 12:23:58 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Shane Regan — Fri, 17 Oct 2014 12:22:52 GMT

Revision 4 posted to Hevacomp Wiki by Shane Regan on 10/17/2014 12:22:52 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Shane Regan — Fri, 17 Oct 2014 12:21:54 GMT

Revision 3 posted to Hevacomp Wiki by Shane Regan on 10/17/2014 12:21:54 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Shane Regan — Tue, 01 Jul 2014 10:48:17 GMT

Revision 2 posted to Hevacomp Wiki by Shane Regan on 7/1/2014 10:48:17 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: results, netsys, V26, Bentley Hevacomp

Netsys Pipe Sizing Standards

Shane Regan — Tue, 01 Jul 2014 10:47:00 GMT

Revision 1 posted to Hevacomp Wiki by Shane Regan on 7/1/2014 10:47:00 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	v8i (v26)
	Environment:	N/A
	Area:	Netsys
	Subarea:	Pipe Sizing
	Original Author:	Bentley Technical Support Group

Overview

Bentley Hevacomp V8i v26 now includes the option to implement the BS EN 806-3:2006 standards for pipe sizing.

This applies to HWS and CWS systems in both Netsys and System Builder.

Method

Loading units and flow rate calculation methods specified by BS EN 806-3 differ to that of the preceding BS 6700. Both of these standards are available in Hevacomp v8i v26.

The Pipes>Defaults menu now displays options for BS 6700 and BS EN 806-3, as in image below.

Existing projects from previous versions of Hevacomp will remain set to BS 6700.
All new projects created in Hevacomp v26 will default to BS EN 806-3 automatically.

If changing the standards on your project, ensure you recalculate your system.

Information

BS EN 806-3 uses both different loading units and a different flow rate calculation method to that of BS 6700.

Loading Units:
These are detailed in BS EN 806-3, Table 2. Taking a Basin as an example, the difference between the two standards in this regard can be seen in the following side-by-side comparison:

Should you wish to specify a specific flow rate at your outlet rather than use these loading units, then you can instead enter a figure for Continuous flow, as below.

Flow rate calculation method:
Each final pipe connecting to an outlet is sized using the maximum flow rate (l/s) for that outlet.

For diversity in distribution pipes feeding groups of outlets the total of connected Loading units of the outlets fed by that pipe are used. BS EN 806-3 considers the highest single loading unit connected to that run and uses the appropriate line on the graph of Figure B.1, BS EN 806-3 (below) to calculate the diversified flow rate at that point. This process is repeated at each distribution pipe using the highest connected outlet Loading unit.

Example

The effect of the new standards on flow rate results is best shown by example. Consider the following system:

Note that the pipe properties in the example above represent:

Looking at section one, for example, the key figures are:

Total flow rate (in Loading units) = 1 + 1 + 1 + 4 = 7
Highest single Loading Unit at any outlet supplied (i.e. outlet H4) = 4

The point of intersection between these two lines shows the corresponding Design flow rate on the y-axis, in this case 0.483 l/s.

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Pipe sizing - Pipe Sizing Standards

Pipe sizing - Pipe Sizing Standards

Overview

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Example

Pipe sizing - Pipe Sizing Standards

Overview

Method

Information

Example

Netsys Pipe Sizing Standards

Overview

Method

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Example

Netsys Pipe Sizing Standards

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Method

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Example

Netsys Pipe Sizing Standards

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Example

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Netsys Pipe Sizing Standards

Method

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Example

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Netsys Pipe Sizing Standards

Method

Information

Example

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Netsys Pipe Sizing Standards

Method

Information

Example

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Netsys Pipe Sizing Standards

Overview

Method

Information

Example

See Also

External Links

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Netsys Pipe Sizing Standards

Overview

Method

Information

Example

See Also

External Links

Comments or Corrections?

Netsys Pipe Sizing Standards

Overview

Method

Information

Example

See Also

External Links

Comments or Corrections?